2026-05-13T20:36:05Z http://web.app.ufz.de/publikationsdatenbank/oai-pmh

oai:ufz.de:1 2024-11-06T00:55:07Z

Arsel, M. Spoor, M. Abdullayev, I. Mielke, K. Mollinga, P.P. Monsees, Jan Schetter, C. Shah, U. ter Steege, B. 2009 no abstract application/pdf https://dx.doi.org/10.4324/9780203866467 en Routledge, Abingdon Arsel, M., Spoor, M.;; Water, environmental security and sustainable rural development: Conflict and cooperation in Central Eurasia;; 21 - 48 info:eu-repo/semantics/closedAccess ISBN: 9780415461610 Water, war and reconstruction irrigation management in the Kunduz region, Afghanistan info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:2 2025-01-24T00:56:18Z

Adrian, Lorenz ; orcid:0000-0001-8205-0842 Dudková, V. Demnerová, K. Bedard, D.L. 2009 "Dehalococcoides" sp. strain CBDB1 in pure culture dechlorinates a wide range of PCB congeners with three to eight chlorine substituents. Congener-specific high-resolution gas chromatography revealed that CBDB1 extensively dechlorinated both Aroclor 1248 and Aroclor 1260 after four months of incubation. For example, 16 congeners comprising 67.3% of the total PCBs in Aroclor 1260 were decreased by 64%. We confirmed the dechlorination of 43 different PCB congeners. The most prominent dechlorination products were 2,3',5-chlorinated biphenyl (25-3-CB) and 24-3-CB from Aroclor 1248 and 235-25-CB, 25-25-CB, 24-25-CB, and 235-236-CB from Aroclor 1260. Strain CBDB1 removed flanked para chlorines from 3,4-, 2,4,5-, and 3,4,5-chlorophenyl rings, primarily para chlorines from 2,3,4,5-chlorophenyl rings, primarily meta chlorines from 2,3,4- and 2,3,4,6-chlorophenyl rings, and either meta or para chlorines from 2,3,4,5,6-chlorophenyl rings. The site of attack on the 2,3,4-chorophenyl ring was heavily influenced by the chlorine configuration on the opposite ring. This dechlorination pattern matches PCB Process H dechlorination, which was previously observed in situ both in the Acushnet Estuary (New Bedford, MA) and in parts of the Hudson River (New York). Accordingly, we propose that Dehalococcoides bacteria similar to CBDB1 are potential agents of Process H PCB dechlorination in the environment. This is the first time that a complex naturally occurring PCB dechlorination pattern has been reproduced in the laboratory using a single bacterial strain. application/pdf https://dx.doi.org/10.1128/AEM.00102-09 en American Society for Microbiology (ASM), Washington, DC Applied and Environmental Microbiology 75 (13);; 4516 - 4524 info:eu-repo/semantics/openAccess ISSN: 0099-2240 "Dehalococcoides" sp. strain CBDB1 extensively dechlorinates the commercial polychlorinated biphenyl mixture aroclor 1260 info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:3 2025-01-24T00:56:18Z

Adrian, Lorenz ; orcid:0000-0001-8205-0842 2009 The Microflex project, funded within the first call of the European Research Council, focuses on a specific group of bacteria, the Dehalococcoides-like Chloroflexi. This group of bacteria deeply rooting in the phylogenetic tree is formed by several cultivated strains of the proposed genus "Dehalococcoides" and many sequences of uncultivated organisms mostly from marine sediments or terrestrial subsurface locations. The project compares cultivated Dehalococcoides species growing by organohalide respiration using halogenated compounds as electron acceptors with marine Chloroflexi populations. For this comparison a wide array of different approaches and techniques are used including cultivation, biochemical analyses, molecular tools and isotopic fractionation measurements. The project aims at contributing to the understanding of the physiology of Dehalococcoides-like Chloroflexi in deep marine sediments and their mode of living. A second aim of the project is the further understanding of the physiology and biochemistry of dehalogenating Dehalococcoides species and how these bacteria can be used efficiently for bioremediation of contaminated subsurface environments. application/pdf https://dx.doi.org/10.1007/s11157-009-9166-y en Springer Reviews in Environmental Science and Biotechnology 8 (3);; 225 - 229 info:eu-repo/semantics/closedAccess ISSN: 1569-1705 Marine sediments Anaerobic bacteria Reductive dehalogenation ERC-group microflex: microbiology of Dehalococcoides-like Chloroflexi info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:4 2025-01-24T00:56:18Z

Adrian, Lorenz ; orcid:0000-0001-8205-0842 Reinhardt, R. Kube, M. 2009 no abstract application/pdf https://dx.doi.org/10.1016/j.gca.2009.05.001 en Elsevier Geochimica et Cosmochimica Acta 73 (13 Suppl.);; A12 info:eu-repo/semantics/closedAccess ISSN: 0016-7037 Genomics as a tool to analyze bioremediation potentials and functional diversification in subsurface environments info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:5 2023-11-06T10:52:59Z

Alcamo, J. Alcamo, J. Kok, K. Busch, G. Priess, Jörg 2009 application/pdf https://dx.doi.org/10.1016/S1574-101X(08)00404-3 en Elsevier, Amsterdam Alcamo, J.;; Environmental futures. The practice of environmental scenario analysis;; 67 - 103 info:eu-repo/semantics/closedAccess ISBN: 9780444532930 Searching for the future of land: scenarios from the local to global scale info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:6 2023-11-06T10:52:59Z

Alfreider, A. Vogt, Carsten Geiger-Kaiser, M. Psenner, R. 2009 application/pdf https://dx.doi.org/10.1016/j.syapm.2008.11.005 en Elsevier Systematic and Applied Microbiology 32 (2);; 140 - 150 info:eu-repo/semantics/closedAccess ISSN: 0723-2020 Groundwater systems Chemolithoautotrophic bacteria RubisCO genes Distribution and diversity of autotrophic bacteria in groundwater systems based on the analysis of RubisCO genotypes info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:7 2023-11-06T10:52:59Z

Allan, I.J. Booij, K. Paschke, Albrecht Vrana, Branislav Mills, G.A. Greenwood, R. 2009 The performance of seven passive sampling devices for the monitoring of dissolved concentrations of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBS), hexachlorobenzene, and p,p'-DDE was evaluated through simultaneous field exposures of 7-28 days in the River Meuse (The Netherlands). Data from the Chemcatcher, low density polyethylene membranes, two versions of the membrane-enclosed sorptive coating (MESCO) sampler, silicone rods, silicone strips and semipermeable membrane devices (SPMD) was assessed through rate of dissipation of performance reference compounds (PRCs), mass of analyte absorbed by the samplers and time-weighted average concentration (C-TWA) data. Consistent PRC data throughout the range of samplers tested here confirmed the transition from membrane- to boundary layer-controlled exchange at log K-OW 4.5-5.0. The comparison of sampler surface area-normalized masses absorbed for analytes under boundary layer-control showed some variability between samplers that can be attributed to the conformation and deployment of the various samplers and to the uncertainty associated with the analysis conducted in different laboratories. Despite different modes of calculation, relatively consistent C-TWA were obtained for the different samplers. The observed variability is likely to be due to the uncertainty of sampler-water partition coefficients and the extrapolation of analyte uptake rates at the high log K-OW range (under boundary layer-controlled exchange) from a narrow PRC data range, and these issues require further work. Finally, the usefulness of passive sampler-generated contaminant concentrations is demonstrated through the comparison with institutional monitoring and with European Water Framework Directive Environmental Duality Standards (EQS) application/pdf https://dx.doi.org/10.1021/es900608w en American Chemical Society (ACS), Washington, DC info:eu-repo/semantics/closedAccess ISSN: 0013-936X Field performance of seven passive sampling devices for monitoring of hydrophobic substances info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:8 2024-11-12T00:56:35Z

Altenburger, Rolf ; orcid:0000-0003-2929-2978 Greco, W.R. 2009 This is 1 of 12 papers prepared by participants attending the workshop "Risk Assessment in European River Basins-State of the Art and Future Challenges" held in Liepzig, Germany on 12-14 November 2007. The meeting was organized within the framework of the European Commission's Coordination Action RISKBASE program. The objective of RISKBASE is to review and synthesize the outcome of European Commission FP4-FP6 projects, and other major initiatives, related to integrated risk assessment-based management of the water/sediment/soil environment at the river basin scale.Mixture exposure against several stressors is what organisms in the environment typically experience, and combined effects resulting from this are well documented. Risk management often still focuses on the assessment of individual priority compounds. Because of the large number of possible mixtures and their variability in time, experimental investigation of every conceivable mixture for their adverse effects is not a viable option. Instead, during the past decade, modeling approaches have been discussed in ecotoxicology that allow the prediction of expected combination effects based on the knowledge of the biological activity of the individual components. This contribution summarizes mixture exposure situations where consensus has been achieved about extrapolation techniques. In particular, for simultaneous exposure and for sequential exposure with no intervening recovery, currently available evidence demonstrates reasonable predictability of combined effects from the information of the individual mixture components. By contrast, when organisms are exposed to pulsed exposure with recovery periods or when nonchemical stressors interfere, there is still an open research field as how to account for these types of interaction. application/pdf https://dx.doi.org/10.1897/IEAM_2008-038.1 en Wiley Integrated Environmental Assessment and Management 5 (1);; 62 - 68 info:eu-repo/semantics/closedAccess ISSN: 1551-3777 Mixture toxicity Combined effects Sequential exposure Models for risk assessment Extrapolation concepts for dealing with multiple contamination in environmental risk assessment info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:9 2024-11-12T00:56:35Z

Altenburger, Rolf ; orcid:0000-0003-2929-2978 Gündel, Ulrike Ali-Aycheh, M. Hanisch, Karen Küster, Anette Rechenberg, B. Schreiber, R. 2009 no abstract application/pdf https://dx.doi.org/10.1016/j.toxlet.2009.06.857 en Elsevier Toxicology Letters 189 (Suppl. 1);; S191 - S192 info:eu-repo/semantics/closedAccess ISSN: 0378-4274 Models for extrapolation of long-term effects of pharmaceuticals in the environment using therapeutic information info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:10 2024-02-08T00:56:09Z

Borchardt, D. Pusch, M. Altmoos, U. Schmidt, J. Bohle, H.-W. Ibisch, Ralf Borchardt, Dietrich 2009 In the present study the effects of high level treated wastewater on the composition and distribution of hyporheic fauna were examined. The physico-chemical environment and the quantity and quality of organic material in the interstitial pore system showed strong gradients along longitudinal, horizontal and depth profiles of two riffles upstream and downstream of the outlet of a wastewater treatment plant (WWTP). Also, interstitial invertebrate assemblages showed characteristic distribution patterns. In the downwelling zone of riffle A upstream of the WWTP, the invertebrate taxa Diptera, Copepoda, Cladocera and Ephemeroptera accounted for 75 % of the total abundance, while in the down-welling zone of riffle B, 200 m downstream of the WWTP, the most abundant taxa were Nematoda, Oligochaeta and Isopoda accounting for a total of 65 % of the interstitial assemblage. Correlations between invertebrates and environmental parameters showed a shift from a carbon-controlled invertebrate community in riffle A to a community controlled by toxic effects of wastewater in riffle B. Hydrological exchange processes had a substantially impact on the environmental conditions in the hyporheic zone of riffle A. In contrast the composition and the dominance structure of the interstitial assemblage in riffle B was clearly controlled by the effects of wastewater on the environmental conditions. application/pdf en Schweizerbart, Stuttgart Borchardt, D., Pusch, M.;; The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions;; 161 - 184 info:eu-repo/semantics/closedAccess ISSN: 1612-166X ISBN: 9783510470631 Magdeburg, Bibliothek, 00377539, 10-2484 MA : Z Magdeburg, Bibliothek, 00401333, 11-0307 MA : Z Abundance and spatial variability of invertebrate communities in the River Lahn (Germany) and their relation to hyporheic properties info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:11 2023-11-06T10:52:59Z

Scholz, M. Henle, K. Dziock, F. Stab, S. Foeckler, F. Amarell, U. Klotz, Stefan 2009 de Ulmer, Stuttgart Scholz, M., Henle, K., Dziock, F., Stab, S., Foeckler, F.;; Entwicklung von Indikationssystemen am Beispiel der Elbaue;; 171 - 202 info:eu-repo/semantics/closedAccess ISBN: 9783800144273 Leipzig, Bibliothek, Hauptlesesaal, 00354806, 09-1017 DK: 502.6/.7 Ent Halle, Bibliothek, 00354967, 09-1018 Magdeburg, Bibliothek, 00355124, 09-1019 MA : Bi 40 Struktur und Dynamik charakteristischer Pflanzenpopulationen und Vegetationstypen mitteldeutscher Auen als Indikatoren der Standortbedingungen info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:12 2023-11-06T10:52:59Z

Anadón, Jose Daniel Giménez, A. Ballestar, R. Pérez, I. 2009 The use of local ecological knowledge (LEK) has been advocated for biodiversity monitoring and management. To date, however, it has been underused in studying wild populations of animals and, particularly, in obtaining quantitative abundance estimates. We evaluated LEK as a tool for collecting extensive data on local animal abundance and population trends. We interviewed shepherds in southeastern Spain, asking them to estimate the local abundance of the terrestrial tortoise Testudo graeca. We quantified reliability of abundance estimates derived from interviews by comparing them with those obtained from standard field-sampling protocols (distance sampling). We also explored the complementarity of these 2 approaches. LEK provided high-quality and low-cost information about both distribution and abundance of T. graeca. Interviews with shepherds yielded abundance estimates in a much wider range than linear transects, which only detected the species in the upper two-thirds of its abundance range. Abundance estimates from both methodologies showed a close relationship. Analysis of confidence intervals indicated local knowledge could be used to estimate mean local abundances and to detect mean population trends. A cost analysis determined that the information derived from LEK was 100 times cheaper than that obtained through linear-transect surveys. Our results should further the use of LEK as a standard tool for sampling the quantitative abundance of a great variety of taxa, particularly when population densities are low and traditional sampling methods are expensive or difficult to implement. application/pdf https://dx.doi.org/10.1111/j.1523-1739.2008.01145.x en Wiley Conservation Biology 23 (3);; 617 - 625 info:eu-repo/semantics/closedAccess ISSN: 0888-8892 animal abundance cost-efficiency distance sampling local ecological knowledge terrestrial tortoises Testudo graeca Evaluation of local ecological knowledge as a method for collecting extensive data on animal abundance info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:13 2023-12-09T00:55:05Z

Angeles-Wedler, Dalia Mackenzie, Katrin ; orcid:0000-0002-7877-4810 Kopinke, Frank-Dieter 2009 Pd-based catalysts have become important in environmental catalysis for their ability to hydrodechlorinate a wide range of chlorinated organic contaminants in water under ambient conditions. The success of their application in the remediation practice, e.g. for groundwater treatment, is often hindered by the sensitivity of Pd to poisoning by sulphur compounds. In this study, the stability and sulphide-induced deactivation behaviour of a highly active Pd/Al2O3 catalyst was investigated. The specific activity of Pd for the hydrodechlorination of chlorobenzene corresponds to rate coefficients up to kPd = 350 L g-1 min-1. The totally deactivated catalyst, resultant of sulphide poisoning, was regenerated with potassium permanganate. The pH value, as a key parameter which may influence the degree of deactivation as well as the efficiency of catalyst regeneration, was evaluated. Results show that in clean water the Pd/Al2O3 catalyst showed no inherent deactivation regardless of the ageing time and the pH value of the catalyst suspension. The degree of catalyst poisoning effected by 1.8-5.4 µM sulphide, corresponding to molar ratios of S:Pdsurface = 1.5-8.5, was observed to be higher under neutral and alkaline than under acidic conditions. The exposure of the catalyst to higher sulphide concentration of 14.2 µM resulted in complete catalyst deactivation regardless of the pH conditions. However, the efficacy of permanganate as oxidative regenerant for the fouled catalyst showed strong pH-dependence. A regeneration time of 10-30 min at low pH was sufficient to recover completely the high catalytic activity of Pd/Al2O3 for the hydrodechlorination reaction application/pdf https://dx.doi.org/10.1016/j.apcatb.2009.04.023 en Elsevier Applied Catalysis B-Environmental 90 (3-4);; 613 - 617 info:eu-repo/semantics/closedAccess ISSN: 0926-3373 Pd catalyst Sulphides Catalyst poisoning Regeneration Potassium permanganate Hydrodechlorination Sulphide-induced deactivation of Pd/Al2O3 as hydrodechlorination catalyst and its oxidative regeneration with permanganate info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:14 2023-11-06T10:52:59Z

Angelstein, Susanne Schubert, H. 2008 Based on the wide range of Elodea nuttallii, from oligo-mesotrophic waters to highly eutrophic environments, it is important to determine its potential effect on the phosphorus cycle, particularly in nutrient-poor lake ecosystems. Therefore, the absorption, transport and release of phosphorus by E. nuttallii plants were studied using 33P. The experiments were conducted in a 2-compartment apparatus for translocation studies and in non-partitioned Erlenmeyer flasks for the determination of uptake kinetics. The plants absorbed phosphorus via both roots and shoots. The phosphorus uptake via shoots significantly exceeded the phosphorus uptake via roots. The absorbed phosphorus was equally translocated via acripetal or basipetal movements, and was incorporated in all parts of the plants tested. The determined phosphorus incorporation rate (IRP) was nearly 5 times lower when phosphorus was fed through the root system, than the IRP when phosphorus was fed through the shoots. Additionally, we detected clear evidence for phosphorus recycling via plants. Phosphorus recycling processes have a substantial effect on the balance of phosphorus acquisition by E. nuttallii. However, phosphorus uptake was exclusively detected during illumination. Considering this strong dependency of phosphorus uptake on light, we assume that the absorption and release of phosphorus might be linked with photosynthesis and respiratory processes. Our results suggest that the effect on lake water of a potential leakage of phosphorus via the shoots might be small. application/pdf https://dx.doi.org/10.3354/ab00080 en Inter-Research, Oldendorf/Luhe Aquatic Biology 3 (3);; 209 - 216 info:eu-repo/semantics/closedAccess ISSN: 1864-7790 Elodea nuttallii Macrophyte Phosphorus cycle in lakes Phosphorus uptake Phosphorus release Phosphorus recycling Elodea nuttallii: uptake, translocation and release of phosphorus info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:15 2023-11-06T10:52:59Z

Angelstein, Susanne Schubert, H. 2009 Light acclimatisation capabilities of Elodea nuttallii at nearly ambient DIC conditions were investigated by determining growth characteristics, main photosynthetic parameters and pigmentation of plants incubated at 5 different irradiances (10-146 µmol photons m-2 s-1). Positive net growth was observed under all light treatments tested. Maximum ratio root versus shoot (r:s) of 1.86 was achieved at medium irradiances (72-94 µmol photons m-2 s-1), whereas at low (10 µmol photons m-2 s-1) and high irradiances (146 µmol photons m-2 s-1) r:s was significantly lower (0.39 and 1.05, respectively). With respect to main photosynthetic parameters, an increase of light compensation points (E c), attended by decreasing ratios of light saturation points of photosynthesis (E k)/irradiance were observed. E c values were comparable to other low-light adapted macrophytes, which indicate that E. nuttallii can be regarded as a low-light adapted plant, under photorespiratory conditions. This was also confirmed by maximum E k values of just 73 µmol photons m-2 s-1. Further support was achieved from pigmentation and non-photochemical quenching (NPQ) data, both indicating rather limited acclimatisation ability at light treatments above 90 µmol photons m-2 s-1. These results are discussed with respect to the competitive abilities of E. nuttallii under nearly ambient (photorespiratory) DIC conditions, especially in dense stands and turbid phytoplankton-dominated waters. application/pdf https://dx.doi.org/10.1007/s11258-008-9500-4 en Springer Plant Ecology 202 (1);; 91 - 101 info:eu-repo/semantics/closedAccess ISSN: 1385-0237 Elodea nuttallii DIC Photosynthesis Pigmentation Growth Competition on light Light acclimatisation of Elodea nuttallii grown under ambient DIC conditions info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:16 2023-11-06T10:52:59Z

Angelstein, Susanne Wolfram, Christa Rahn, Karsten Kiwel, Uwe Frimel, Siegfried Merbach, Ines Schubert, H. 2009 Elodea nuttallii and Myriophyllum spicatum are highly competitive invaders replacing established vegetation in Europe and North America, respectively. In this study, the effect of different sediment nutrient contents on growth and competition potential of these two macrophyte species in nutrient-poor environments was investigated. When the sediment nutrient content was decreased, both species showed a gradual decrease in vitality, in terms of decreasing nutrient contents in the plant tissue, decreasing length relative growth rate (RGR) and increasing root:shoot ratios. E. nuttallii also revealed a decrease in weight RGR. At lower sediment nutrient contents both species were severely phosphorus-limited. As an evidence for inter-specific competition, we found a decreasing strength of the plant tissue: sediment relationships for nitrogen and phosphorus in M. spicatum if exposed to E. nuttallii. application/pdf https://dx.doi.org/10.1127/1863-9135/2009/0175-0049 en Schweizerbart, Stuttgart Fundamental and Applied Limnology 175 (1);; 49 - 57 info:eu-repo/semantics/closedAccess ISSN: 1863-9135 Oligotrophic lake conditions root competition macrophyte sediment fertility phosphorus limitation The influence of different sediment nutrient contents on growth and competition of Elodea nuttallii and Myriophyllum spicatum in nutrient-poor waters info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:17 2023-06-16T10:54:50Z

Angelstein, Susanne 2009 en info:eu-repo/semantics/closedAccess Experimental studies on light-acclimation and phosphorus uptake strategies of Elodea nuttallii (Planchon) St. John info:eu-repo/semantics/doctoralThesis https://purl.org/dc/dcmitype/Text

oai:ufz.de:18 2025-09-09T00:52:39Z

Anton, Christian Boßdorf, Oliver 2009 Innerartliche Variation ist eines der Schlüsselprinzipien der Evolution. Ein Paradebeispiel sind die Gehäuse der Schwarzmündigen Bänderschnecke (Cepaea nemoralis), deren extreme Farb- und Bänderungsvielfalt mit natürlicher Selektion durch Fraßfeinde und anderen Umweltbedingungen zusammenhängt. In einem europaweiten Projekt wollen Evolutionsbiologen nun herausfinden, wie die Verbreitung und Vielfalt der Bänderschnecke durch die aktuelle Klimaerwärmung beeinflusst wird. application/pdf https://dx.doi.org/10.1002/biuz.200990003 de Biologie in unserer Zeit 39 (1);; 14 - 15 info:eu-repo/semantics/closedAccess ISSN: 0045-205X Evolution Megalab: Die geheimnisvolle Vielfalt der Bänderschnecken info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:19 2023-11-06T10:52:59Z

Wirth, C. Gleixner, G. Heimann, M. Armesto, J.J. Smith-Ramírez, C. Carmona, M.R. Celis-Diez, J.L. Díaz, I.A. Gaxiola, A. Gutiérrez, Alvaro Núñez-Avila, M.C. Pérez, C.A. Rozzi, R. 2009 A structural and compositional definition of old-growth forest is presented, which places emphasis on the lack of recurrent human impact, the presence of a shade-tolerant canopy with emergent pioneers, and a patch area that minimises edge effects. Using this definition, we provide an overview of the current conservation status, relevance of plant-animal interactions, and unique features of nutrient fluxes in old-growth forests of southern South America. Chile hosts the largest area and latitudinal extent of old-growth temperate forest remaining in the southern hemisphere, reaching 56° S in the Cape Horn Archipelago. Despite recent public and private efforts to protect remaining old-growth forests and their endemic biodiversity, they continue to decline steeply as a result of new routes of access to commercial stands, lack of protection of coastal areas, anthropogenic fire, and expansion of monoculture-based forestry toward higher latitudes and altitudes. Pollinators (insects and birds) and vertebrate frugivores (birds and an arboreal marsupial) are important mutualists of many Chilean rain forest trees, vines and epiphytes. There is evidence to suggest that some native pollinators and animal seed vectors may be highly susceptible to changes in forest structure due to loss of old-growth forest cover. Forest fragmentation and loss of keystone, animal-pollinated emergent trees due to logging and fires, have radically changed pollinator assemblages in rural landscapes, leading to reproductive dependence on European honey bees and other exotic species. Regarding other ecosystem functions, nutrient cycles in unpolluted old-growth forests of southern Chile are characterised by strong inorganic nitrogen (N) retention and large organic N leakage to forest streams. Non-symbiotic N fixation in litter and soil tends to increase in older stands. Knowledge of these "unpolluted nutrient cycles", particularly N and P, is still meager despite its relevance to understanding the consequences of increased global disruption of element cycles by humans. Development of baseline measurements and experiments in southern Chilean old-growth temperate forests can enhance our understanding of unpolluted ecosystem functioning. application/pdf https://dx.doi.org/10.1007/978-3-540-92706-8_16 en Springer, Berlin, Heidelberg, New York Wirth, C., Gleixner, G., Heimann, M.;; Old-growth forests. Function, fate and value;; 367 - 390 info:eu-repo/semantics/closedAccess ISSN: 0070-8356 ISBN: 9783540927051 Old-growth temperate rainforests of South America: conservation, plant-animal interactions, and baseline biogeochemical processes info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:20 2024-01-30T00:56:13Z

Arnold, Sven Attinger, Sabine Frank, Karin ; orcid:0000-0002-2769-0692 Hildebrandt, Anke 2009 In this paper we develop and apply a conceptual ecohydrological model to investigate the effects of model structure and parameter uncertainty on the simulation of vegetation structure and hydrological dynamics. The model is applied for a typical water limited riparian ecosystem along an ephemeral river: the middle section of the Kuiseb River in Namibia. We modelled this system by coupling an ecological model with a conceptual hydrological model. The hydrological model is storage based with stochastical forcing from the flood. The ecosystem is modelled with a population model, and represents three dominating riparian plant populations. In appreciation of uncertainty about population dynamics, we applied three model versions with increasing complexity. Population parameters were found by Latin hypercube sampling of the parameter space and with the constraint that three species should coexist as observed. Two of the three models were able to reproduce the observed coexistence. However, both models relied on different coexistence mechanisms, and reacted differently to change of long term memory in the flood forcing. The coexistence requirement strongly constrained the parameter space for both successful models. Only very few parameter sets (0.5% of 150 000 samples) allowed for coexistence in a representative number of repeated simulations (at least 10 out of 100) and the success of the coexistence mechanism was controlled by the combination of population parameters. The ensemble statistics of average values of hydrologic variables like transpiration and depth to ground water were similar for both models, suggesting that they were mainly controlled by the applied hydrological model. The ensemble statistics of the fluctuations of depth to groundwater and transpiration, however, differed significantly, suggesting that they were controlled by the applied ecological model and coexistence mechanisms. Our study emphasizes that uncertainty about ecosystem structure and intra-specific interactions influence the prediction of the hydrosystem. application/pdf https://dx.doi.org/10.5194/hess-13-1789-2009 en Copernicus Publications Hydrology and Earth System Sciences 13 (10);; 1789 - 1807 info:eu-repo/semantics/openAccess ISSN: 1027-5606 Uncertainty in parameterisation and model structure affect simulation results in coupled ecohydrological models info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:21 2023-11-06T10:52:59Z

Arp, H.P.H. Goss, Kai Uwe 2009 Equilibrium gas/particle partitioning coefficients of terrestrial aerosols, Kip, are dependent on various intermolecular interactions that can be quantified by experimentally determined compound-specific descriptors. For many compounds of environmental interest, such as emerging contaminants and atmospheric phototransformation products, these compound-specific descriptors are unknown or immeasurable. Often, only the molecular structure is known. Here we present the ability of two computer programs to predict equilibrium partitioning to terrestrial aerosols solely on the basis of molecular structure: COSMOtherm and SPARC. The greatest hurdle with designing such an approach is to identify suitable molecular surrogates to represent the dominating sorbing phases, which for ambient terrestrial aerosols are the water insoluble organic matter (WIOM) phase and the mixed-aqueous phase. For the WIOM phase, hypothetical urban secondary organic aerosol structural units from Kalberer et al. Science 2004, 303, 1659-1662 were investigated as input surrogates, and for the mixed-aqueous phase mildly acidic water was used as a surrogate. Using a validation data set of more than 1400 experimentally determined Kip values for polar, apolar, and ionic compounds ranging over 9 orders of magnitude (including semivolatile compounds such as PCDD/Fs, pesticides, and PBDEs), SPARC and COSMOtherm were generally able to predict Kip values well within an order of magnitude over an ambient range of temperature and relative humidity. This is remarkable as these two models were not fitted or calibrated to any experimental data. As these models can be used for potentially any organic molecule, they are particularly recommended for environmental screening purposes and for use when experimental compound descriptor data are not available. application/pdf https://dx.doi.org/10.1021/es8025165 en American Chemical Society (ACS), Washington, DC info:eu-repo/semantics/closedAccess ISSN: 0013-936X Ambient gas/particle partitioning. 3. Estimating partition coefficients of apolar, polar, and ionizable organic compounds by their molecular structure info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:22 2023-11-06T10:52:59Z

Arp, H.P.H. Goss, Kai Uwe 2009 Experimentally determined gas/particle partitioning constants, Kip, using inverse gas chromatography (IGC) are presented for perfluorocarboxylic acids (PFCAs), covering a diverse set of terrestrial aerosols over an ambient range of relative humidity (RH) and temperature. The results are compared to estimated Kip values using a recently developed model that has been validated for diverse neutral and ionizable organic compounds. The modeling results consistently underestimate the experimental results. This is likely due to additional partition mechanisms unique for surfactants not being accounted for in the model, namely aggregate formation and water surface adsorption. These processes likely also biased the IGC Kip measurements compared to ambient PFCA concentrations. Nevertheless, both the experimental and modeling results indicate that partitioning to terrestrial particles in ambient atmospheres is negligible, though sorption to condensed water can be substantial. This favors rain sequestration as a more important atmospheric removal mechanism than dry particle sequestration. PFCAs found on particle filters during ambient sampling are thus accountable to vapor-phase PFCAs or aqueous-phase PFCAs sorbing directly to the filters, or the trapping of perfluorocarboxylate-salt particles. Further work on understanding the partitioning and speciation of PFCAs in atmospheric water droplets is needed to further quantify and understand their atmospheric behavior. To aid in this, a general RH dependent Kip model for surfactants is presented. application/pdf https://dx.doi.org/10.1021/es901864s en American Chemical Society (ACS), Washington, DC info:eu-repo/semantics/closedAccess ISSN: 0013-936X Gas/particle partitioning behavior of perfluorocarboxylic acids with terrestrial aerosols info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:23 2023-11-06T10:52:59Z

Arp, H.P.H. Goss, Kai Uwe 2009 no abstract application/pdf https://dx.doi.org/10.1016/j.atmosenv.2009.03.001 en Elsevier Atmospheric Environment 43 (22-23);; 3654 - 3655 info:eu-repo/semantics/closedAccess ISSN: 1352-2310 Response to Comment on "Irreversible sorption of trace concentrations of perfluorocarboxylic acids to fiber filters used for air sampling" by Arp and Goss (Atmospheric Environment 42, 6869-6872, 2008) Discussion info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:24 2023-11-06T10:52:59Z

Attinger, Sabine Dimitrova, J. Kinzelbach, W. 2009 This paper addresses the question of how spatial variability in the hydraulic and chemical properties of groundwater systems affects the transport and sorption behavior of pollutants at the field scale. In this paper, we limit our investigations on pollutants that adsorb according to an equilibrium controlled non-linear Freundlich sorption isotherm. The new contribution of this paper is take into account not only spatially variable Freundlich distribution coefficients K-s but spatially variable Freundlich nonlinearity parameters p as well. Using a homogenization theory approach, we shortly review the impact of spatially variable hydraulic properties on the transport and extend the theory to spatially variable chemical properties. We show that spatially variable Freundlich exponents cause a very different field scale transport and sorption behavior than spatial variations in the distribution coefficients only since in the first case field scale Freundlich parameters and field scale dispersion coefficients become concentration dependent. In particular, field scale retardation is much larger than small-scale retardation. (C) 2009 Elsevier Ltd. All rights reserved application/pdf https://dx.doi.org/10.1016/j.advwatres.2009.01.011 en Elsevier Advances in Water Resources 32 (5);; 767 - 777 info:eu-repo/semantics/closedAccess ISSN: 0309-1708 Upscaling Homogenization Freundlich isotherm Effective parameters Homogenization of the transport behavior of nonlinearly adsorbing pollutants in physically and chemically heterogeneous aquifers info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:25 2023-11-06T10:52:59Z

Babel, Wolfgang 2009 Microorganisms are used in biotechnology. They are either (i) aim and purpose of a process, e.g. with the production of single cell proteins, or (ii) mean to an end insofar as they serve as a catalyst or factory for syntheses (e.g. of products of primary and secondary metabolism, of enzymes and antibiotics) or for the degradation and detoxification of harmful organics and inorganics. In all cases, the efficiency and velocity, finally the productivity, are parameters which essentially determine the economy of the processes. Therefore, search for approaches to optimize these processes is a permanent task and challenge for scientists and engineers. It is shown that the auxiliary substrate concept is suitable to increase the yield coefficients. It is based on the energetic evaluation of organics, on the knowledge that organics as sources of carbon and energy for growth are deficient in ATP and/or reducing equivalents, and says that it is possible to improve the carbon conversion efficiency up to the carbon metabolism determined upper limit. The latter is determined by inevitable losses of carbon along the way of assimilation and anabolism and amounts to about 85% for so-called glycolytic substrates, e.g. glucose, methanol, and to about 75% for gluconeogenetic substrates, e.g. C2-substrates (acetic acid, hexadecane). The approach is explained and some experimental examples are presented. By simultaneous utilization of an extra energy source (auxiliary substrate) the yield coefficient can be increased (i) in glucose from about 0.5 to 0.7 g/g (by means of formate), (ii) in acetate from 0.34-0.4 to 0.5-0.65 g/g (by means of formate and thiosulfate, respectively), and (iii) in hexadecane from about 0.94 to 1.26 g/g (by means of formate). The precalculated yield coefficients and mixing ratios agree well with the experimentally attained ones. The approach is easily feasible and economically valuable. application/pdf https://dx.doi.org/10.1002/elsc.200900027 en Wiley Engineering in Life Sciences 9 (4);; 285 - 290 info:eu-repo/semantics/closedAccess ISSN: 1618-0240 Auxiliary substrate Energetic evaluation Upper limit Yield coefficient The auxiliary substrate concept: from simple considerations to heuristically valuable knowledge info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:26 2023-11-06T10:52:59Z

Babik, Wieslaw Pabijan, M. Arntzen, J.W. Cogălniceanu, D. Durka, Walter ; orcid:0000-0002-6611-2246 Radwan, Jacek 2009 Depletion of polymorphism at major histocompatibility complex (MHC) genes has been hypothesized to limit the ability of populations to respond to emerging pathogens, thus putting their survival at risk. As pathogens contribute substantially to the global amphibian decline, assessing patterns of MHC variation is important in devising conservation strategies. Here, we directly compare levels of MHC class II and neutral variation between multiple populations of the great crested newt (Triturus cristatus) from refugial (REF: Romania) and postglacial expansion (PGE: Germany, Poland and UK) areas. REF populations harboured high levels of adaptive variation (24 expressed alleles), exhibiting clear signatures of historical positive selection, which points to the overall importance of MHC class II variation in this species. On the other hand, PGE populations were extremely depauperate (two alleles) but nevertheless have survived for c. 10 000 years, since the postglacial expansion. Variation in putative MHC class II pseudogenes, microsatellites and allozymes also showed a significant southern richness-northern purity pattern. The populations in the postglacial expansion area thus provide the clearest example to date of the long-term survival of populations in which MHC variation, historically under positive selection, has been depleted application/pdf https://dx.doi.org/10.1111/j.1365-294X.2008.04057.x en Wiley Molecular Ecology 18 (5);; 769 - 781 info:eu-repo/semantics/closedAccess ISSN: 0962-1083 amphibian decline glacial refugia MHC class II MHC pseudogenes positive selection Triturus cristatus Long-term survival of a urodele amphibian despite depleted major histocompatibility complex variation info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:27 2023-12-09T00:55:05Z

Baborowski, Martina Schäfer, J. Blanc, G. Pelzer, J. Ternes, T. von Tümpling, Wolf ; orcid:0000-0003-1815-4764 Claus, E. 2009 application/pdf de Gesellschaft Deutscher Chemiker (GDCh), Frankfurt/Main Wasser 2009. Jahrestagung der Wasserchemischen Gesellschaft, Stralsund, 18.-20.05.2009;; 261 - 265 info:eu-repo/semantics/closedAccess Der Einfluss von Niedrigwasser auf Stofftransport und Umsetzungen in großen Flüssen - Beispiel Elbe info:eu-repo/semantics/conferenceItem https://purl.org/dc/dcmitype/Text

oai:ufz.de:28 2023-11-06T10:52:59Z

Baborowski, Martina 2009 application/pdf de Bundesanstalt für Gewässerkunde, Koblenz Aspekte des Schadstoffmonitorings an Schwebstoffen und Sedimenten in der aquatischen Umwelt / 18. Chemisches Kolloquium am 16./17. Juni 2009 in Koblenz;; 23 - 31 info:eu-repo/semantics/closedAccess ISSN: 1866-220X Monitoring bei Hochwasser - Beispiel Schwermetalle info:eu-repo/semantics/conferenceItem https://purl.org/dc/dcmitype/Text

oai:ufz.de:29 2023-11-06T10:52:59Z

Badea, Silviu Vogt, Carsten Weber, Stefanie Danet, A.-F. Richnow, Hans Hermann 2009 Carbon isotope fractionation factors were determined with the dichloro elimination of g-hexachlorocyclohexane (g-HCH) by the sulfate-reducing bacteria Desulfococcus multivorans DSM 2059 and Desulfovibrio gigas DSM 1382. Both strains are known for cometabolic HCH dechlorination. Degradation experiments with g-HCH in concentrations of 22-25 µM were carried out using benzoate (for D. multivorans) and lactate (for D. gigas) as electron donors, respectively. g-HCH was dechlorinated by both bacterial strains within four weeks, and the metabolites g-3,4,5,6-tetrachlorocyclohexene (g-TCCH), chlorobenzene (CB), and benzene were formed. The carbon isotope fractionation of g-HCH dechlorination was quantified by the Rayleigh model, using a bulk enrichment factor (eC) of -3.9 ± 0.6 for D. gigas and -3.4 ± 0.5 for D. multivorans, which correspond to apparent kinetic isotope effect (AKIEC) values of 1.023 ± 0.004 or 1.02 ± 0.003 for stepwise Cl-C bond cleavage. The extent and range of isotope fractionation suggest that g-HCH dechlorination can be monitored in anoxic environments by compound-specific isotope analysis (CSIA). application/pdf https://dx.doi.org/10.1021/es801284m en American Chemical Society (ACS), Washington, DC info:eu-repo/semantics/closedAccess ISSN: 0013-936X Stable isotope fractionation of γ-hexachlorocyclohexane (lindane) during reductive dechlorination by two strains of sulfate-reducing bacteria info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:30 2023-11-06T10:52:59Z

Badeck, F. Pompe, Sven Glauer, A. 2009 no abstract application/pdf http://www.bfn.de/fileadmin/MDB/documents/service/Skript246.pdf de Bundesamt für Naturschutz (BfN), Bonn Biodiversität und Klima - Vernetzung der Akteure in Deutschland IV, Insel Vilm, 14.-17.10.2007;; 14 - 16 info:eu-repo/semantics/openAccess Klimaszenarien, bioklimatische Daten und Regionalisierungsansätze info:eu-repo/semantics/reportPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:31 2023-11-06T10:52:59Z

Bailón, L. Nikolausz, Marcell Kästner, Matthias Veiga, M.C. Kennes, C. 2009 The removal of dichloromethane (DCM) from polluted air was studied both in biotrickling filters and in continuous stirred tank bioreactors, using either a single-liquid aqueous phase or a combination of an aqueous-organic liquid phase. The presence of the organic phase, i.e. silicone oil, at a volume ratio of 10% of the liquid phase, increased the maximum EC by about 25% in the BTF, reaching 200 g m3/h, and by as much as 300% in the CSTB, reaching 350 g m3/h. Based on data of chloride release in the aqueous phase and carbon dioxide production in the gas phase, complete dechlorination and mineralization of the pollutant could be confirmed. When applying shock loads, a more stable behaviour was observed in the presence of the organic phase. Generally, the completely mixed reactors were also more stable than the plug-flow biotrickling filters, irrespective of the presence of the organic phase. The use of molecular techniques allowed showing that the originally inoculated DCM-degrading Hyphomicrobium strains remained present, although not dominant, after long-term bioreactor operation. Different new bacterial populations did also appear in the systems, some of which were unable to degrade DCM. application/pdf https://dx.doi.org/10.1016/j.watres.2008.09.031 en Elsevier Water Research 43 (1);; 11 - 20 info:eu-repo/semantics/closedAccess ISSN: 0043-1354 Activated sludge reactor Air pollution Completely mixed reactor Dichloromethane Hyphomicrobium Plug flow Shock load Removal of dichloromethane from waste gases in one- and two-liquid-phase stirred tank bioreactors and biotrickling filters info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:32 2023-11-06T10:52:59Z

Balcke, Gerd Paschke, Heidrun Vogt, Carsten Schirmer, M. 2009 Chlorobenzene-contaminated groundwater was used to assess pulsed gas sparging as a minimum effort aeration strategy to enhance intrinsic natural attenuation. In contrast to existing biosparging operations, oxygen was supplied at minimum rate by reducing the gas injection frequency to 0.33 day-1. Field tests in a model aquifer were conducted in a 12 m long reactor, filled with indigenous aquifer material and continuously recharged with polluted groundwater over 3 years. The closed arrangement allowed yield balances, cost accounting as well as the investigation of spatial distributions of parameters which are sensitive to the biodegradation process. Depending on the injection frequency and on the gas chosen for injection (pure oxygen or air) oxygen-deficient conditions prevailed in the aquifer. Despite the limiting availability of dissolved oxygen in the groundwater, chlorobenzene degradation under oxygen-deficient conditions proved to be more effective than under conditions with dissolved oxygen being available in high concentrations.Minimum rate gas sparging resulted in sustained biodegradation of chlorobenzene in a polluted groundwater aquifer. application/pdf https://dx.doi.org/10.1016/j.envpol.2009.02.030 en Elsevier Environmental Pollution 157 (7);; 2011 - 2018 info:eu-repo/semantics/closedAccess ISSN: 0269-7491 Groundwater Oxygen-deficient Remediation Oxygenation Chlorobenzene Pulsed gas injection: a minimum effort approach for enhanced natural attenuation of chlorobenzene in contaminated groundwater info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:33 2024-11-12T00:56:35Z

Bandow, Nicole Altenburger, Rolf ; orcid:0000-0003-2929-2978 Lübcke-von Varel, Urte Paschke, Albrecht Streck, Georg Brack, Werner 2009 One of the major challenges of effect-directed identification of hazardous chemicals in sediments is the appropriate consideration of bioavailability for a hazard-based prioritization of fractions and toxicants. The equilibrium partitioning approach is frequently used to estimate the bioavailability of sediment contaminants. To simulate partitioning of the constituents of complex sediment contaminations in the sediment-water-biota system, a new dosing technique based on silicone elastomer stirrer bars (silicone rods) for use in a growth inhibition test with the green algae Scenedesmus vacuolatus was developed. The dosing technique has a high loading capacity and a fast achievement of equilibrium (5-50 min) for a broad range of model compounds. The subsequent delivery of compounds stored by the silicone during the bioassay compensates possible losses of compounds and keeps the concentrations constant. Furthermore, a dose-dependent response is achieved for single compounds and complex mixtures from sediment extracts. The extracts of three sediment samples from the Elbe River Basin were fractionated using a multistep HPLC method and investigated in the bioassay using conventional DMSO dosing and loaded silicone rods. The results of the toxicity test clearly show that the toxicity patterns are quite different for the two dosing techniques, whereas the differences between the sampling locations are less pronounced. We suggest that partitioning-based dosing better reflects exposure in sediments and thus provides a more realistic identification of key toxicants. application/pdf https://dx.doi.org/10.1021/es803453h en American Chemical Society (ACS), Washington, DC info:eu-repo/semantics/closedAccess ISSN: 0013-936X Partitioning-based dosing: an approach to include bioavailability in the effect-directed analysis of contaminated sediment samples info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:34 2024-11-12T00:56:35Z

Bandow, Nicole Altenburger, Rolf ; orcid:0000-0003-2929-2978 Streck, Georg Brack, Werner 2009 Effect-directed analysis (EDA) has been frequently and successfully used to identify key toxicants in sediment extracts. However, by disregarding bioavailability this approach may lead to a biased prioritisation of fractions and toxicants with respect to hazards and risks. To overcome this problem the present EDA of sediment components from the Blina river (Most, Czech Republic), that inhibit growth of the green algae Scenedesmus vacuolatus, applies a novel partition-based dosing technique to prioritize and identify major toxic fractions and compounds in comparison to conventional solvent dosing. The novel dosing technique is based on partitioning from loaded silicone rods to the aqueous phase similar to partition processes that determine exposure in native sediment-water systems. In the present study the application of partition-based dosing had a big influence suggesting polar compounds such as triclosan as key toxicants while polycyclic aromatic hydrocarbon (PAH) fractions did not exhibit significant effects. In contrast, conventional dosing prioritized mainly PAHs in agreement with previous studies. For both approaches individual toxicants could be confirmed quantitatively based on the index of confirmation quality (ICQ), which compares the effect of fractions and artificial mixtures of identified and quantified toxicants over the full range of effect levels. application/pdf https://dx.doi.org/10.1021/es901351z en American Chemical Society (ACS), Washington, DC info:eu-repo/semantics/closedAccess ISSN: 0013-936X Effect-directed analysis of contaminated sediments with partition-based dosing using green algae cell multiplication inhibition info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:35 2023-11-06T10:52:59Z

Banzhaf, Ellen Grescho, Volker Kindler, Annegret 2009 Urban planning mainly concentrates on the management of cities as an administrative unit. Urban regions, their state and development, constitute the major interaction of urbanization processes. Such regions comprise the urban core and its associated peri-urban and rural areas. Urbanization processes along the rural-urban continuum need to be monitored by a complex set of indicators. In this paper the phenomena of growth and shrinkage patterns are investigated for an inner urban to peri-urban gradient. The area of investigation is a transect covering the eastern part of the urban region of the city of Leipzig, Germany, with its surrounding communes. Selected patterns of spatial processes are analysed for the gradient using Satellite pour l'Observation de la Terre (SPOT) XS data, and additionally, Landsat Thematic Mapper (TM) data where SPOT data were missing. Further statistical information on social, economic and environmental sustainability issues related to land-use changes is analysed. These spatial and statistical analyses are data-driven and reflect a wide range of spatial, socio-economic and ecological development being mutually intertwined. It will be shown how suburban communes and local districts within the city have developed disregarding sustainable planning. By the end of the 1990s peri-urban communes started to be organized in a better coordinated regional development plan, this case study being part of the Grner Ring Leipzig (Green Belt of Leipzig). application/pdf https://dx.doi.org/10.1080/01431160802642297 en International Journal of Remote Sensing 30 (7);; 1675 - 1696 info:eu-repo/semantics/closedAccess ISSN: 0143-1161 Monitoring urban to peri-urban development with integrated remote sensing and GIS information: a Leipzig, Germany case study info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:36 2023-11-06T10:52:59Z

Barra, R. Quiroz, R. Saez, K. Araneda, A. Urrutia, R. Popp, Peter 2009 Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment; there are concerns about them due to their toxic properties. Human activities could significantly contribute to the total PAH burden in river sediments. In this work, we document the analysis of PAHs in sediments taken in the middle stretch of the Biobio River in south central Chile. This river is a principal system, draining more than 24,000 km2 and subjected to a diverse variety of human-made stressors (pulp mill and urban effluents, agricultural drainage systems, etc). During 2003, several sediment samples were taken in more than 45 sampling sites located in the river's middle stretch. Due to the granulometric characteristics (mainly sandy sediments), only 17 samples were analyzed, taking into consideration the presence of a fine section within the sediment sample. Using HPLC with fluorescence detection, 15 EPA priority PAHs and perylene were analyzed. The composition of PAHs in the sediment samples is rather similar between sites and levels averaged 104 ± 78 ng g-1 d.w. The highest levels were detected downstream from an industrial discharge. A good correlation was observed between PAH levels and organic carbon content in the tested sediments; however, concentrations above 134 ng g-1 d.w. did not indicate correlation. The samples PAH ratios (Flu/Pyr and Chr/B(a)A) reveal a strong pyrolytic PAH pattern in the sediments tested, supporting evidence indicating that PAHs come mainly from pyrolytic sources. This result contrasts with previous records that have shown a natural influence in the upper basin and a petrogenic pattern near the mouth. application/pdf https://dx.doi.org/10.1007/s10311-008-0148-z en Springer Environmental Chemistry Letters 7 (2);; 133 - 139 info:eu-repo/semantics/closedAccess ISSN: 1610-3653 PAHs Sediments Biobio River Chile Pollution Sources of polycyclic aromatic hydrocarbons (PAHs) in sediments of the Biobio River in south central Chile info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:37 2023-12-09T00:55:05Z

Barth, J.A.C. Grathwohl, P. Fowler, H.J. Bellin, A. Gerzabek, M.H. Lair, G.J. Barceló, D. Petrovic, M. Navarro, A. Négrel, P. Petelet-Giraud, E. Darmendrail, D. Rijnaarts, H. Langenhoff, A. de Weert, J. Slob, A. van der Zaan, B.M. Gerritse, J. Frank, E. Gutierrez, A. Kretzschmar, R. Gocht, T. Steidle, D. Garrido, F. Jones, K.C. Meijer, S. Moeckel, C. Marsman, A. Klaver, G. Vogel, T. Bürger, C. Kolditz, Olaf ; orcid:0000-0002-8098-4905 Broers, H.P. Baran, N. Joziasse, J. von Tümpling, Wolf ; orcid:0000-0003-1815-4764 Van Gaans, P. Merly, C. Chapman, A. Brouyère, S. Batlle Aguilar, J. Orban, P. Tas, N. Smidt, H. 2009 AquaTerra is one of the first environmental projects within the 6th Framework program by the European Commission. It began in June 2004 with a multidisciplinary team of 45 partner organizations from 13 EU countries, Switzerland, Serbia, Romania and Montenegro. Results from sampling and modeling in 4 large river basins (Ebro, Danube, Elbe and Meuse) and one catchment of the Brévilles Spring in France led to new evaluations of diffuse and hotspot input of persistent organic and metal pollutants including dynamics of pesticides and polycyclic aromatic hydrocarbons, as well as metal turnover and accumulation. While degradation of selected organic compounds could be demonstrated under controlled conditions in the laboratory, turnover of most persistent pollutants in the field seems to range from decades to centuries. First investigations of long-term cumulative and degradation effects, particularly in the context of climate change, have shown that it is also necessary to consider the predictions of more than one climate model when trying to assess future impacts. This is largely controlled by uncertainties in climate model responses. It is becoming evident, however, that changes to the climate will have important impacts on the diffusion and degradation of pollutants in space and time that are just at the start of their exploration. application/pdf https://dx.doi.org/10.1051/agro:2007060 en Springer Agronomy for Sustainable Development 29 (1);; 161 - 173 info:eu-repo/semantics/closedAccess ISSN: 1774-0746 contaminants organic inorganic European river basins climate change sorption biodegradation soil sediment ground- and surface water heavy metals review pesticides atrazine isoproturon alkyphenol acetochlor chlortoluron organochlorine Br diphenyl ethers drugs TOF mass spectrometry 87Sr Mobility, turnover and storage of pollutants in soils, sediments and waters: achievements and results of the EU project AquaTerra. A review info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:38 2023-11-06T10:52:59Z

Bartke, Stephan Schwarze, Reimund 2009 application/pdf de Luchterhand, Köln Grundstücksmarkt und Grundstückswert 20 (4);; 195 - 202 info:eu-repo/semantics/closedAccess ISSN: 0938-0175 Marktorientierte Risikobewertung vornutzungsbelasteter Grundstücke: neue Wege zur transparenten Quantifizierung merkantiler Minderwerte info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:39 2023-11-06T10:52:59Z

Bartke, Stephan Schwarze, Reimund 2009 http://www.sinbra.de/cms/upload/downloads/SINBRA-Ebene_2_Methodenkatalog_0509Endversion.pdf de Brandenburgische Boden Gesellschaft für Grundstücksverwaltung und -verwertung, Zossen SINBRA-Methodenkatalog - Vorstellung der im Verbundvorhaben SINBRA entwickelten Methoden zur Inwertsetzung nicht wettbewerbsfähiger Brachflächen;; 96 - 111 info:eu-repo/semantics/closedAccess Marktorientierte Wertermittlung - Das EUGEN-Wertermittlungsmodul und das Konzept des Marktorientierten Risikoabschlags (MRA) info:eu-repo/semantics/reportPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:40 2023-11-06T10:52:59Z

Bartke, Stephan Morio, M. Schädler, S. Schwarze, Reimund Finkel, M. 2009 http://www.sinbra.de/cms/upload/downloads/TV_1_und_3_SINBRA-Abschlussbericht.pdf de Universität Tübingen, Tübingen info:eu-repo/semantics/closedAccess Forschungsvorhaben SINBRA, Strategien zur nachhaltigen Inwertsetzung nicht wettbewerbsfähiger Brachflächen am Beispiel der Militärliegenschaft Potsdam-Krampnitz: Abschlussbericht der Teilvorhaben 1 und 3" F+E-Vorhaben des BMBF Förderkennzeichen 0330757C info:eu-repo/semantics/report https://purl.org/dc/dcmitype/Text

oai:ufz.de:41 2026-01-15T00:52:50Z

Bastian, S. Busch, Wibke ; orcid:0000-0002-5497-6266 Kühnel, Dana ; orcid:0000-0003-1712-6278 Springer, A. Meißner, T. Holke, R. Scholz, Stefan ; orcid:0000-0002-6990-4716 Iwe, M. Pompe, W. Gelinsky, M. Potthoff, A. Richter, V. Ikonomidou, H. Schirmer, Kristin 2009 Background: Tungsten carbide nanoparticles are being explored for their use in the manufacture of hard metals. To develop nanoparticles for broad applications, potential risks to human health and the environment should be evaluated and taken into consideration. Objective: We aimed to assess the toxicity of well-characterized tungsten carbide (WC) and cobalt-doped tungsten carbide (WC-Co) nanoparticle suspensions in an array of mammalian cells. Methods: We examined acute toxicity of WC and of WC-Co (10% weight content Co) nanoparticles in different human cell lines (lung, skin, and colon) as well as in rat neuronal and glial cells (i.e., primary neuronal and astroglial cultures and the oligodendrocyte precursor cell line OLN-93) . Furthermore, using electron microscopy, we assessed whether nanoparticles can be taken up by living cells. We chose these in vitro systems in order to evaluate for potential toxicity of the nanoparticles in different mammalian organs (i.e., lung, skin, intestine, and brain) . Results: Chemical-physical characterization confirmed that WC as well as WC-Co nanoparticles with a mean particle size of 145 nm form stable suspensions in serum-containing cell culture media. WC nanoparticles were not acutely toxic to the studied cell lines. However, cytotoxicity became apparent when particles were doped with Co. The most sensitive were astrocytes and colon epithelial cells. Cytotoxicity of WC-Co nanoparticles was higher than expected based on the ionic Co content of the particles. Analysis by electron microscopy demonstrated presence of WC nanoparticles within mammalian cells. Conclusions: Our findings demonstrate that doping of WC nanoparticles with Co markedly increases their cytotoxic effect and that the presence of WC-Co in particulate form is essential to elicit this combinatorial effect. application/pdf https://dx.doi.org/10.1289/ehp.0800121 en National Institute of Environmental Health Sciences, Research Triangle Park, NC Environmental Health Perspectives 117 (4);; 530 - 536 info:eu-repo/semantics/openAccess ISSN: 0091-6765 cellular uptake cobalt doping cobalt salt human cell cultures in vitro nanoparticle behavior toxicity tungsten carbide nanoparticles Toxicity of tungsten carbide and cobalt-doped tungsten carbide nanoparticles in mammalian cells in vitro info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:42 2023-11-06T10:52:59Z

Bathe, Frauke Klauer, Bernd 2009 application/pdf de Deutsche Vernetzungsstelle Ländliche Räume in der Bundesanstalt für Landwirtschaft und Ernährung LandInForm (12);; 12 - 13 info:eu-repo/semantics/closedAccess ISSN: 1866-3176 Die Wasserrahmenrichtlinie: Kernelemente und Knackpunkte info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:43 2023-11-06T10:52:59Z

Bauer, Mario Dondero, F. Olivieri, C. Viarengo, A.G. Rudzok, Susanne 2009 no abstract application/pdf https://dx.doi.org/10.1016/j.toxlet.2009.06.275 en Elsevier Toxicology Letters 189 (Suppl. 1);; S91 - S91 info:eu-repo/semantics/closedAccess ISSN: 0378-4274 Comparative transcriptomic responses to acute nickel and chlorpyrifos exposure in human HepG2 info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:44 2023-11-06T10:52:59Z

Bauer, R.D. Rolle, M. Eberhardt, C. Grathwohl, P. Bauer, Sebastian Kolditz, Olaf ; orcid:0000-0002-8098-4905 Meckenstock, R.U. Griebler, C. 2009 In case of dissolved electron donors and acceptors, natural attenuation of organic contaminant plumes in aquifers is governed by hydrodynamic mixing and microbial activity. Main objectives of this work were (i) to determine whether aerobic and anaerobic biodegradation in porous sediments is controlled by transverse dispersion, (ii) to elucidate the effect of sediment heterogeneity on mixing and biodegradation, and (iii) to search for degradation-limiting factors. Comparative experiments were conducted in two-dimensional sediment microcosms. Aerobic toluene and later ethylbenzene degradation by Pseudomonas putida strain F1 was initially followed in a plume developing from oxic to anoxic conditions and later under steady-state mixing-controlled conditions. Competitive anaerobic degradation was then initiated by introduction of the denitrifying strain Aromatoleum aromaticum EbN1. In homogeneous sand, aerobic toluene degradation was clearly controlled by dispersive mixing. Similarly, under denitrifying conditions, microbial activity was located at the plume's fringes. Sediment heterogeneity caused flow focusing and improved the mixing of reactants. Independent from the electron accepting process, net biodegradation was always higher in the heterogeneous setting with a calculated efficiency plus of 23-100% as compared to the homogeneous setup. Flow and reactive transport model simulations were performed in order to interpret and evaluate the experimental results. application/pdf https://dx.doi.org/10.1016/j.jconhyd.2008.11.004 en Elsevier Journal of Contaminant Hydrology 105 (1-2);; 56 - 68 info:eu-repo/semantics/closedAccess ISSN: 0169-7722 Biodegradation Contaminant plume Natural attenuation Sediment heterogeneity Toluene oxidation Transverse dispersion Enhanced biodegradation by hydraulic heterogeneities in petroleum hydrocarbon plumes info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:45 2023-11-06T10:52:59Z

Bayer-Raich, Marti Jarsjö, J. Teutsch, Georg 2009 Monitoring of contaminant plumes and predicting their future fate are essential for effective management of groundwater contaminants. Solute breakthrough curves from operating pumping wells can provide information on the water quality in relatively large aquifer regions, which may be unavailable to instrumentation and direct measurement for practical and/or economical reasons. Relations between spatially varying aquifer concentrations C 0(x, y) initially surrounding a well and temporally varying concentrations of subsequently extracted well water, C (t), then need to be quantified. However, limited applicability of analytical expressions and numerical inaccuracies related to solving transport equations for converging flow fields hamper such quantifications even in homogeneous aquifers. We use a stream-tube approach and provide a general problem formulation that accounts for first-order degradation and linear, instantaneous, sorption/retardation in heterogeneous aquifers. An analytical expression is obtained for homogeneous aquifer conditions (in the well vicinity), relating any given initial C 0(x, y) function and the subsequent contaminant breakthrough C (t) in the well. Results for wide plumes subject to first-order degradation show that concentrations at the extraction well will increase as a function of pumping time. This increase is despite the fact that late-time data reflect longer transport paths (to the well), along which mass is removed through degradation. We also derive unique solutions for the inverse problem, in particular considering how the average contaminant concentration C (averaged along a control plane through the well within its capture zone, perpendicular to the mean groundwater flow direction) depends on the measurable C (t). The solutions demonstrate that the longer the pumping time, the more sensitive the solutions for C become to degradation rate constants, which if needed can be determined in situ using multiple control planes. application/pdf https://dx.doi.org/10.1029/2007WR006075 en American Geophysical Union (AGU), Washington, DC Water Resources Research 45 (2);; W02413 info:eu-repo/semantics/openAccess ISSN: 0043-1397 Breakthrough of attenuating contaminant plumes in pumping wells: Analytical model and implications for integral pumping tests info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:46 2026-04-14T00:52:55Z

Beck, Silke Kuhlicke, Christian ; orcid:0000-0002-1193-228X Görg, Christoph 2009 application/pdf en Helmholtz Centre for Environmental Research - UFZ, Leipzig info:eu-repo/semantics/openAccess ISSN: 0948-9452 Leipzig - Reportsammlung, Bibliothek, 00355957, 09-1222 F/E Climate Policy Integration, Coherence, and Governance in Germany: PEER Climate Change Initiative - Project 2: "Climate Policy Integration, Coherence and Governance" info:eu-repo/semantics/report https://purl.org/dc/dcmitype/Text

oai:ufz.de:47 2023-11-06T10:52:59Z

Beck, Silke 2009 de Metropolis, Marburg info:eu-repo/semantics/closedAccess ISBN: 9783895187711 Leipzig, Bibliothek, Hauptlesesaal, 00356923, 09-1123 DK: 551.58 Bec Halle, Bibliothek, 00355933, 09-1240 Intergovernmental Panel on Climate Change Climatic changes - Government policy Climatic changes - International cooperation IPCC Klimaänderung Anthropogener Einfluss Expertise Politikberatung Das Klimaexperiment und der IPCC: Schnittstellen zwischen Wissenschaft und Politik in den internationalen Beziehungen info:eu-repo/semantics/book https://purl.org/dc/dcmitype/Text

oai:ufz.de:48 2023-11-06T10:52:59Z

Halfmann, J. Schützenmeister, F. Beck, Silke 2009 application/pdf de VS Verlag für Sozialwissenschaften, Wiesbaden Halfmann, J., Schützenmeister, F.;; Organisationen der Forschung: der Fall der Atmosphärenwissenschaft;; 120 - 144 info:eu-repo/semantics/closedAccess ISBN: 9783531157894 Von der Beratung zur Verhandlung - Der Fall IPCC info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:49 2023-11-06T10:52:59Z

Hötzl, H. Beck, Silke 2009 application/pdf http://www.iwrm-smart.org en Hötzl, H.;; Sustainable management of available water resources with innovative technologies;; 1 - 23 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/reportPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:50 2023-11-06T10:52:59Z

Beketov, Mikhail 2009 application/pdf https://dx.doi.org/10.1016/j.trac.2009.09.006 en Elsevier TrAC-Trends in Analytical Chemistry 28 (10);; III info:eu-repo/semantics/closedAccess ISSN: 0165-9936 SPEAR (pesticide) pinpoints pollution in minutes info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:51 2023-11-06T10:52:59Z

Beketov, Mikhail 2009 Aim To test two hypotheses: (i) the Rapoport effect is valid for a river continuum, particularly regarding the altitudinal distribution of mayflies over the large-scale continuum from alpine stream to medium-sized lowland river, and (ii) the observed Rapoport effect is based on high nestedness of the meta-assemblage, implying the presence of a common species pool and species-thinned nested subsets. Location Geometric centre of Eurasia, south-western Siberia, Russia. Methods Regression analysis of breadth and midpoints of species altitudinal ranges, species richness and altitude. Comparison of the observed patterns with the null model predicted by the mid-domain effect and conventional null hypothesis. Nestedness analysis. Results The Rapoport effect was explicitly demonstrated: species altitudinal ranges expanded with increase in the ranges' midpoints and average per-altitude ranges increased with increase in altitude and concurrent decrease in species richness. The significance of each trend was confirmed with respect to both the null models applied. Nestedness analysis has revealed that the observed Rapoport effect is based on nested organization of the meta-assemblage over the river altitudinal/longitudinal gradient: a common species pool at low (but not the lowest) altitudes and nested subsets of this pool at higher altitudes. Main conclusions This study for the first time credibly shows the altitudinal Rapoport effect in freshwaters. This finding demonstrates cross-habitat-type consistency of the Rapoport effect, but does not suggest that the Rapoport effect is an obligatory attribute of river systems or lotic organisms. High nestedness underlying the observed Rapoport effect together with some previous studies indicate that the Rapoport effect in altitudinal and bathymetric gradients in general may be based on nested organization. The study highlights a deficiency of cross-habitat-type analyses of macroecological patterns (i. e. over terrestrial, freshwater and marine habitats) application/pdf https://dx.doi.org/10.1111/j.1466-8238.2009.00466.x en Wiley Global Ecology and Biogeography 18 (4);; 498 - 506 info:eu-repo/semantics/closedAccess ISSN: 1466-822X Altitude freshwater macroecology mayflies mid-domain effect nestedness Rapoport effect river continuum river system surface waters The Rapoport effect is detected in a river system and is based on nested organization info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:52 2023-11-06T10:52:59Z

Beketov, Mikhail Foit, Kaarina Schäfer, Ralf Schriever, Carola Sacchi, Angela Capri, E. Biggs, J. Wells, C. Liess, Matthias 2009 To detect effects of pesticides on non-target freshwater organisms the Species at risk (SPEAR(pesticides)) bioindicator based on biological traits was previously developed and successfully validated over different biogeographical regions of Europe using species-level data on stream invertebrates. Since many freshwater biomonitoring programmes have family-level taxonomic resolution we tested the applicability of SPEAR(pesticides) with family-level biomonitoring data to indicate pesticide effects in streams (i.e. insecticide toxicity of pesticides). The study showed that the explanatory power of the family-level SPEAR(fm)(pesticides) is not significantly lower than the species-level index. The results suggest that the family-level SPEAR(fm)(pesticides) is a sensitive, cost-effective, and potentially European-wide bioindicator of pesticide contamination in flowing waters. Class boundaries for SPEAR(pesticides) according to EU Water Framework Directive are defined to contribute to the assessment of ecological status of water bodies. application/pdf https://dx.doi.org/10.1016/j.envpol.2009.01.021 en Elsevier Environmental Pollution 157 (6);; 1841 - 1848 info:eu-repo/semantics/closedAccess ISSN: 0269-7491 SPEAR indicates pesticide effects in streams - Comparative use of species- and family-level biomonitoring data info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:53 2023-11-06T10:52:59Z

Beketov, Mikhail 2009 The aim of the study was to test the hypothesis that patterns of cross-Eurasian longitudinal distribution of lotic mayflies are determined by species' ecological requirements and the presence of the West Siberian Lowland. In particular, the objective was to test whether this great lowland is an environmental barrier preventing longitudinal dispersal of the rheophilic (i.e., preferring fast-running highland waters), but not the potamophilic (i.e., preferring slow-current lowland waters) mayflies, as its entire territory contains no rapidly-flowing streams suitable for rheophilic species. This hypothesis was tested indirectly by comparison of altitudinal ranges of species characterised by different cross-Eurasian distribution patterns (mainly East Palaearctic and Transpalaearctic species distributed over the Asian part of Palaearctica and entire Palaearctica respectively), The material used for the analyses was collected in the centre of Eurasia, southwestern Siberia, Russia. The region covered both lowland and mountain territories. The studied biogeographical groups of mayflies have distinctly different altitudinal distribution: the Transpalaearctic species inhabit lowland. watercourses only, while the East Palaearctic species inhabit the entire altitudinal range with most of the species preferring high elevations (on average 700 m a.s.l.). These results confirmed the stated hypothesis and showed that for most of the East Palaearctic (but not Transpalaearctic) species the West Siberian Lowland can be an environmental barrier preventing their westward dispersal and therefore precluding mixing of the East and West Palaearctic rheophilic faunas. However, possible alternative hypotheses cannot be ruled out, as altitudinal ranges of some of these species do not fall out of the elevation range of the West Siberian Lowland. Remarkably, the East Palaearctic species, which by definition have narrower distribution than the Transpalaearctic species, have broader altitudinal ranges than the Transpalaearctic species. This pattern is related to the altitudinal Rapoport effect recently detected for mayfly distribution over the river systems. application/pdf https://dx.doi.org/10.1051/limn/2009024 en EDP Sciences, Les Ulis Annales de Limnologie-International Journal of Limnology 45 (4);; 209 - 218 info:eu-repo/semantics/closedAccess ISSN: 0003-4088 Altitude ecological requirements Ephemeroptera macroecology range Cross-Eurasian and altitudinal distribution of lotic mayflies - species with wider altitudinal ranges have narrower geographical distribution info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:54 2022-11-04T13:41:00Z

oai:ufz.de:55 2023-11-06T10:52:59Z

Benndorf, Dirk Vogt, Carsten Jehmlich, Nico ; orcid:0000-0002-5638-6868 Schmidt, Yvonne Thomas, H. Woffendin, G. Shevchenko, A. Richnow, Hans Hermann von Bergen, Martin 2009 BTEX compounds such as benzene are frequent soil and groundwater contaminants that are easily biodegraded under oxic conditions by bacteria. In contrast, benzene is rather recalcitrant under anaerobic conditions. The analysis of anoxic degradation is often hampered by difficult sampling conditions, limited amounts of biomass and interference of matrix compounds with proteomic approaches. In order to improve the procedure for protein extraction we established a scheme consisting of the following steps: dissociation of cells from lava granules, cell lysis by ultrasonication and purification of proteins by phenol extraction. The 2D-gels revealed a resolution of about 240 proteins spots and the spot patterns showed strong matrix dependence, but still differences were detectable between the metaproteomes obtained after growth on benzene and benzoate. Using direct data base search as well as de novo sequencing approaches we were able to identify several proteins. An enoyl-CoA hydratase with cross species homology to Azoarcus evansii, is known to be involved in the anoxic degradation of xenobiotics. Thereby the identification confirmed that this procedure has the capacity to analyse the metaproteome of an anoxic living microbial community. application/pdf https://dx.doi.org/10.1007/s10532-009-9261-3 en Springer Biodegradation 20 (6);; 737 - 750 info:eu-repo/semantics/closedAccess ISSN: 0923-9820 Extraction and purification of proteins Benzene biodegradation Microbial community Metaproteome analysis Contaminated groundwater Improving protein extraction and separation methods for investigating the metaproteome of anaerobic benzene communities within sediments info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:56 2023-11-06T10:52:59Z

Berg, R.H. Taylor, C.G. Berg, R.H. Fester, Thomas Taylor, C.G. 2009 The root-knot nematode feeding cell is a remarkable example of the reprogramming of plant cells by biotrophic pathogens. With the aid of molecules secreted into plant cells from three esophageal gland cells, the root-knot nematode Meloidogyne sp. orchestrates a fundamental change in those cells surrounding its head in the plant root. These cells expand in volume over tenfold and become a virtual factory for the production of cytoplasm that is a rich source of nutrients for the nematode. Because of the large size of the cells, Treub (1887) coined the term "giant-cell" to describe them. Giant-cells have attracted the attention of biologists for over 100 years (reviewed in Christie 1936) and they continue to challenge investigators that are using modern techniques in molecular biology, biochemistry, and microscopy to answer long-held questions. This chapter examines giant-cells from a cell biologist's point of view, i.e., with an eye on identifying notable features of development at a cellular and subcellular level. application/pdf https://dx.doi.org/10.1007/978-3-540-85215-5_5 en Springer, Berlin, Heidelberg, New York Berg, R.H., Taylor, C.G.;; Cell biology of plant nematode parasitism;; 115 - 152 info:eu-repo/semantics/closedAccess ISSN: 1861-1370 ISBN: 9783540852131 Development of the root-knot nematode feeding cell info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:57 2023-11-06T10:52:59Z

Bleeker, W. Hurka, H. Berghöfer, Uta Rauschmayer, Felix 2009 application/pdf de Universität Osnabrück, Osnabrück Bleeker, W., Hurka, H.;; Biologische Invasionen und Phytodiversität. Auswirkungen und Handlungsoptionen;; 24 - 25 info:eu-repo/semantics/closedAccess ISBN: n.a. Leipzig, Bibliothek, Hauptlesesaal, 00356176, 10-0021 DK: 581.9 Bio Ambrosia: vom Vogelfutter zum Risikomanagement info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:58 2023-11-06T10:52:59Z

Bergmann, J. Pompe, Sven Ohlemüller, R. Freiberg, M. Klotz, Stefan Kühn, Ingolf ; orcid:0000-0003-1691-8249 2009 application/pdf http://www.bfn.de/fileadmin/MDB/documents/service/Skript246.pdf de Bundesamt für Naturschutz (BfN), Bonn Biodiversität und Klima - Vernetzung der Akteure in Deutschland IV, Insel Vilm, 14.-17.10.2007;; 35 - 37 info:eu-repo/semantics/openAccess Klimaanaloge Regionen in Europa als Quelle neuer Artenpools für Deutschland - Test eines neuen methodischen Ansatzes info:eu-repo/semantics/reportPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:59 2023-11-06T10:52:59Z

Bernt, Matthias 2009 application/pdf de Bund Demokratischer Wissenschaftler (BDWI), Marburg Forum Wissenschaft 26 (1);; 19 - 22 info:eu-repo/semantics/openAccess ISSN: 0178-6563 Stadtumbau Ost. Wohnungsleerstand und Abrisse in Ostdeutschland info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:60 2023-11-06T10:52:59Z

Bernt, Matthias 2009 Recent discussions of urban governance have emphasized a trend towards the 'entrepreneurialization' of local politics. This model has been intensively discussed and well documented. However, although this concept has been well tested in economically prosperous locations, less attention has been paid to the situation in marginalized regions characterized by a weak economy and a declining population. Taking eastern Germany as an example of a socio-economic context marked by deindustrialization and population decline, the article discusses three main aspects of local governance arrangements under such conditions. First 'coping with decline' has become a more important issue in local politics than 'entrepreneurial' growth-strategies. Second, successful public-private coalition-building is severely complicated. Third, local politics are more dependent on resources from the national government than on private investment, lending greater significance to the national level and resulting in 'grant coalitions' rather than 'growth coalitions'. The article focuses on these different experiences and discusses their implications for the analysis of urban governance application/pdf https://dx.doi.org/10.1111/j.1468-2427.2009.00856.x en Wiley International Journal of Urban and Regional Research 33 (3);; 754 - 769 info:eu-repo/semantics/closedAccess ISSN: 0309-1317 Partnerships for demolition: the governance of urban renewal in East Germany's shrinking cities info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:61 2023-11-06T10:52:59Z

Bernt, Matthias Holm, A. 2009 Building on Peter Marcuse's definition of displacement, this paper examines Berlin's urban renewal policy since the 1990s and studies how different definitions of displacement support different policy alternatives. It argues that the conceptualisation of displacement is not merely an academic exercise, but has enormous political implications. We show how theoretical differences in the definition of displacement have been taken up by policy-makers and used as justification for the withdrawal from 'welfarist' politics of market intervention to be replaced by advisory services to individual tenants. We argue that social scientists are partly responsible for this change and call for more critical intervention of scholars into public debates and a clearer specification of policy alternatives. application/pdf https://dx.doi.org/10.1080/13604810902982268 en Routledge, Abingdon City 13 (2-3);; 312 - 324 info:eu-repo/semantics/closedAccess ISSN: 1360-4813 Cultural Studies Urban Cultures Urban Geography Urban Policy Urban Sociology Urban Sociology - Urban Studies Urban Studies Urban Studies: Urban Studies Is it, or is it not? The conceptualisation of gentrification and displacement and its political implications. The case of Prenzlauer Berg info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:62 2023-11-06T10:52:59Z

Porter, L. Shaw, K. Bernt, Matthias 2009 en Routledge, London Porter, L., Shaw, K.;; Whose urban renaissance? An international comparison of policy drivers and responses to urban regeneration strategies;; 75 - 83 info:eu-repo/semantics/closedAccess ISBN: 9780415456821 Renaissance through demolitions? Leipzig's response to urban shrinkage info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:63 2023-11-06T10:52:59Z

Beyer, C. Konrad, W. Rügner, Hermann Bauer, Sebastian Liedl, R. Grathwohl, P. 2009 In this study, contaminant leaching from three different secondary materials (demolition waste, municipal solid waste incineration ash, and blast furnace slag) to groundwater is assessed by numerical modeling. Reactive transport simulations for a noise protection dam and a road dam (a typical German autobahn), in which secondary materials are reused as base layers, were performed to predict the breakthrough of a conservative tracer (i.e., a salt) and sorbing contaminants (e.g., PAHs like naphthalene and phenanthrene or heavy metals) at the groundwater table. The dam constructions have a composite architecture with soil covers in inclined layers and distinct contrasts in the unsaturated hydraulic properties of the used materials. Capillary barrier effects result in strong spatial variabilities of flow and transport velocities. Contaminant breakthrough curves at the groundwater table show significant tailing due to slow sorption kinetics and a wide distribution of travel times. While conservative tracer breakthrough depends primarily on subsoil hydraulic properties, equilibrium distribution coefficients and sorption kinetics represent additional controlling factors for contaminant spreading. Hence, the three secondary materials show pronounced differences in the temporal development of leached contaminant concentrations with consequences for breakthrough times and peak concentrations at the groundwater table. Significant concentration reductions due to dispersion occur only if the source concentrations decrease significantly prior to the arrival of the contaminant at the groundwater table. Biodegradation causes significant reduction of breakthrough concentrations only if flow velocities are low. application/pdf https://dx.doi.org/10.1016/j.wasman.2008.06.025 en Elsevier Waste Management 29 (2);; 839 - 850 info:eu-repo/semantics/closedAccess ISSN: 0956-053X Model-based prediction of long-term leaching of contaminants from secondary materials in road constructions and noise protection dams info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:64 2022-11-04T13:41:00Z

oai:ufz.de:65 2023-11-06T10:52:59Z

Biganzoli, F. Wiegand, Thorsten Batista, W.B. 2009 We examined spatial patterns of fire-caused mortality and after-fire establishment of two dominant shrub species, Baccharis dracunculifolia and Eupatorium buniifolium in a humid temperate South American savannah. Our objective was to determine whether fires mediate in interactions between these two species. After a natural fire burned a large tract of savannah, we established two plots (respectively 550 and 500 m2) within which we mapped all surviving and dead shrubs as well as all individuals of shrub species that recruited in the following year. We used techniques of point-pattern analysis to test specific null hypotheses about spatial associations in the distribution, mortality, and establishment of shrubs. Results support the notions that fire mediates interactions between these two species. Fire-caused death of E. buniifolium tended to occur selectively in the vicinities of Baccharis individuals, and recruitment of B. dracunculifolia tended to be concentrated in the places of dead shrubs. These responses, however, were contingent on local abundances of shrubs which depend in part from the recent fire history. Anthropogenic perturbation of the natural fire regime would have therefore distorted the role of fire mediated interactions as drivers of the dynamics of the vegetation of this temperate savannah. application/pdf https://dx.doi.org/10.1111/j.1600-0706.2009.17349.x en Wiley Oikos 118 (9);; 1383 - 1395 info:eu-repo/semantics/closedAccess ISSN: 0030-1299 Fire-mediated interactions between shrubs in a South American temperate savannah info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:66 2023-11-06T10:52:59Z

Birmili, W. Alaviippola, B. Hinneburg, D. Knoth, O. Tuch, Thomas Borken-Kleefeld, J. Schacht, A. 2009 Atmospheric particle number size distributions of airborne particles (diameter range 10-500 nm) were collected over ten weeks at three sites in the vicinity of the A100 urban motorway in Berlin, Germany. The A100 carries about 180 000 vehicles on a weekday. The roadside particle distributions showed a number maximum between 20 and 60 nm clearly related to the motorway emissions. The average total number concentration at roadside was 28 000 cm(-3) with a total range of 1200-168 000 cm(-3). At distances of 80 and 400m from the motorway the concentrations decreased to mean levels of 11 000 and 9000 cm(-3), respectively. An obstacle-resolving dispersion model was applied to simulate the 3-D flow field and traffic tracer transport in the urban environment around the motorway. By inverse modelling, vehicle emission factors were derived that are representative of a fleet with a relative share of 6% lorry-like vehicles, and driving at a speed of 80 km h(-1). Three different calculation approaches were compared, which differ in the choice of the experimental winds driving the flow simulation. The average emission factor per vehicle was 2.1 (+/- 0.2) . 10(14) km(-1) for particle number and 0.077 (+/- 0.01) . 10(14) cm(3) km(-1) for particle volume. Regression analysis suggested that lorry-like vehicles emit 123 (+/- 28) times more particle number than passenger car-like vehicles, and lorry-like vehicles account for about 91% of particulate number emissions on weekdays. Our work highlights the increasing applicability of 3-D flow models in urban microscale environments and their usefulness for determining traffic emission factors application/pdf https://dx.doi.org/10.5194/acp-9-2355-2009 en Copernicus Publications Atmospheric Chemistry and Physics 9 (7);; 2355 - 2374 info:eu-repo/semantics/openAccess ISSN: 1680-7316 Dispersion of traffic-related exhaust particles near the Berlin urban motorway - estimation of fleet emission factors info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:67 2023-11-06T10:52:59Z

Bischoff, A. Warthemann, G. Klotz, Stefan 2009 Classical ecological theory predicts a succession towards plant communities that are determined by environmental conditions. However, in ecological restoration, species composition often remains different from the predicted target community, compromising the success of restoration measures.We analysed the relative importance of environmental conditions, management and distance to source populations for floodplain grassland succession following re-conversion from intensive to traditional use. The study was established at 33 grassland sites in central German river valleys. Species composition, environmental variables, past and current management, and the distance to source populations of characteristic species of traditional management (indicator species) were recorded and compared using multivariate statistics. We further tested the speed of colonization by two indicator species, Silaum silaus and Serratula tinctoria, along transects from source populations into unoccupied fields.The species composition of the successional grassland was mainly determined by elevation, total soil nitrogen, distance to remnant species-rich grasslands and frequency of mowing or grazing. Elevation and distance were negatively, and frequency was positively related to the occurrence of late successional species.Colonization by indicator species was only dependent on the distance to source populations; other explanatory variables were not significant. Migration from adjacent source sites of S. silaus and S. tinctoria into re-converted grasslands was slow, reaching only 40 m and 15 m after 15 years.Synthesis and applications. The results demonstrated the limitations of the deterministic view on plant succession and the high relative importance of propagule availability in grassland restoration. Natural colonization will only be successful if source populations of the target species are adjacent to the restoration sites. Artificial introduction techniques are recommended to overcome dispersal barriers. application/pdf https://dx.doi.org/10.1111/j.1365-2664.2008.01581.x en Wiley Journal of Applied Ecology 46 (1);; 241 - 249 info:eu-repo/semantics/openAccess ISSN: 0021-8901 colonization dispersal limitation grassland restoration river valley Serratula tinctoria Silaum silaus species pool Succession of floodplain grasslands following reduction in land use intensity: the importance of environmental conditions, management and dispersal info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:68 2023-11-06T10:52:59Z

Bleicher, Alena Groß, Matthias Gross, Matthias 2008 application/pdf en Helmholtz Centre for Environmental Research - UFZ, Leipzig ConSoil 2008. Proceedings of the 10th International UFZ-Deltares/TNO Conference on Soil-Water Systems in cooperation with Provincia di Milano, Italy, 3-6 June 2008;; 215 - 220 info:eu-repo/semantics/closedAccess ISBN: 9783000245985 Leipzig, Bibliothek, elektronische Medien, 00316682, 08-0742 EM Halle, Bibliothek, 00317160, 08-0743 EM Magdeburg, Bibliothek, 00317009, 08-0744 MA EM Cleaning up the mess: governance strategies in the revitalization of contaminated land in Germany. Theme A: Policies on soil-water systems (strategies, legislation, regulations, guidelines, etc.) info:eu-repo/semantics/conferenceItem https://purl.org/dc/dcmitype/Text

oai:ufz.de:69 2023-12-20T00:55:29Z

Bleicher, Alena Bittens, Martin Groß, Matthias 2009 In Europa existieren etwa 20.000 großflächig kontaminierte Flächen, so genannte Megasites. Als Megasites werden industriell kontaminierte Landschaften bezeichnet, auf denen weiträumig zahlreiche Schadstoffquellen und komplexe Schadstoffgemische im Untergrund vorhanden sind. Im Rahmen des Forschungsprogramms SAFIRA II, vorgestellt im altlasten spektrum vom Januar 2007, werden Methoden und Strategien zur Revitalisierung von Megasites entwickelt. Ein Teilprojekt ist die Entwicklung eines computerbasierten Systems zur Unterstützung von Entscheidungen bei der Durchführung von Revitalisierungsmaßnahmen. Als Grundlage für dieses System analysiert die sozialwissenschaftliche Forschung Entscheidungsprozesse und Kommunikationsstrukturen von Sanierungsprojekten. Eine der Besonderheiten in den Entscheidungsabläufen im Kontext der Revitalisierung von Megasites ist das Entscheiden unter Bedingungen des Nichtwissens. Innerhalb der Risikoforschung hat sich seit geraumer Zeit die Frage nach der Bedeutung des Nichtwissens (ignorance) in Abgrenzung zum Risiko herausgebildet. application/pdf https://dx.doi.org/10.37307/j.1864-8371.2009.03.05 de Erich Schmidt, Berlin altlasten spektrum 18 (3);; 136 - 141 info:eu-repo/semantics/closedAccess ISSN: 0942-3818 "Keiner weiß genau was da unten ist": Vom erfolgreichen Umgang mit Nichtwissen in Sanierungsprojekten info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:70 2023-11-06T10:52:59Z

Bleicher, Alena Gross, Matthias 2009 no abstract application/pdf en Springer History and Philosophy of the Life Sciences 31 (1);; 119 - 121 info:eu-repo/semantics/closedAccess ISSN: 0391-9714 Book review: "Aulikki Litzen, Genius Logistics. Occupational Geographical Mobility of Nobel Prize Winners in Science 1860-2005, Helsinki: The Finnish Society of Science and Letters, 2008, Illus., 157 pp." info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:71 2023-11-06T10:52:59Z

Boehrer, Bertram Fukuyama, R. Chikita, K. Kikukawa, H. 2009 From six deep caldera lakes in Japan, namely lakes Ikeda, Towada, Tazawa, Toya, Kuttara and Shikotsu (in Japanese referred to as Ikedako, Towadako, Tazawako, Toyako, Kuttarako and Shikotsuko), fine resolution profiles of temperature, electrical conductivity, dissolved oxygen and pH have been measured. Measurements were conducted just after deep circulation from the end of March to the end of May 2005. Lake Ikeda and Lake Towada did not undergo a complete turnover. Both showed meromictic features with a clear interface separating the recirculated mixolimnion from the deeper monimolimnion. Lake Tazawa and Lake Toya showed a complete turnover in winter 2004/05, while in Lake Kuttara and Lake Shikotsu, a deep water body remained throughout winter due to pressure effects on the temperature of maximum density. Although these deep waters were never fully recycled into the mixolimnion, they presented themselves as well supplied with oxygen and well circulated within themselves. Where overturn had not been complete small gradients in the oxygen profile, pH profiles and electrical conductivity profiles could be detected. However only in Lake Towada were concentrations of dissolved substances and gradients high enough to have decisive impact on the circulation pattern. application/pdf https://dx.doi.org/10.1007/s10201-008-0257-1 en Springer Limnology 10 (1);; 17 - 24 info:eu-repo/semantics/closedAccess ISSN: 1439-8621 Physical limnology Stratification Density Deep water Meromixis Deep water stratification in deep caldera lakes Ikeda, Towada, Tazawa, Kuttara, Toya and Shikotsu info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:72 2023-11-06T10:52:59Z

Likens, G.E. Boehrer, Bertram Schultze, Martin 2009 Most lakes show periods of density stratification. The stratification controls currents and vertical circulation, and hence is crucial for understanding and predicting the evolution of water quality in lakes. The availability of nutrients and oxygen, for example, impacts on organisms that can live in the lake. Water properties above the lake bed control recycling of settling material and recycling by bioturbation from buried material in the sediment. Exposure of the lake surface to seasonal changes of weather conditions, inflows and outflows as well as internal chemical transformations create gradients in the distribution of heat and dissolved substances. Both factors contribute to density. Diffusive processes, wind impact on the lake surface, as well as surface cooling and geothermal heating, in general, erode this stratification. In most lakes, mixing overcomes the stratifying processes at times and lakes show circulation periods alternating with stratification periods during an annual cycle. Some lakes, however, can stay permanently stratified. To understand the density stratification, various approaches have been developed to evaluate density at required accuracy. Most usually, temperature and conductivity measurements are used to calculate (potential) density by applying empirical regression curves. In many cases, lake-specific coefficients need to be evaluated. The resulting profiles of stability quantities can be used to estimate vertical transport in a stratified lake. Bulk quantities for the stability indicate the strength of wind forcing that is required for intense upwelling. application/pdf https://dx.doi.org/10.1016/B978-012370626-3.00077-6 en Elsevier, Amsterdam Likens, G.E.;; Encyclopedia of inland waters;; 583 - 593 info:eu-repo/semantics/closedAccess ISBN: 9780120884629 Density stratification and stability info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:73 2023-11-06T10:52:59Z

Castendyk, D.N. Eary, L.E. Boehrer, Bertram Schultze, Martin 2009 application/pdf en Society for Mining, Metallurgy, and Exploration, Littleton, CO Castendyk, D.N., Eary, L.E.;; Mine pit lakes: characteristics, predictive modeling, and sustainability;; 45 - 59 info:eu-repo/semantics/closedAccess ISBN: 9780873353052 Stratification and circulation of pit lakes info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:74 2023-11-06T10:52:59Z

Boehrer, Bertram Dietz, Severine von Rohden, C. Kiwel, Uwe Jöhnk, K.D. Naujoks, S. Ilmberger, J. Lessmann, D. 2009 From a small meromictic lake, we present observations of a circulation pattern that has not been documented in the limnological literature before. While surface cooling drives a vertical circulation of the upper water layer (mixolimnion), the deeper water layer (monimolimnion) is not included because of its higher salt concentration. However, double diffusion (higher diffusivity of heat than of dissolved substances) facilitates the faster escape of heat from the monimolimnion compared to dissolved substances during cold periods. As a consequence, interfacial cooling drives a vertical circulation within the monimolimnion without breaking the stratification toward the mixolimnion. In the presented case, the geochemical setting does not permit dissolved substances to accumulate in the mixolimnion. As a consequence, the system approaches the case of two immiscible layers in thermal contact. Below the interface, a convection layer is formed that exceeds the staircase layer thickness of double diffusion when conservative salts are involved. Finally, the entire lake circulates as two separate convection layers. This has a decisive impact on the formation of gradients and the redistribution of dissolved substances in lakes. application/pdf https://dx.doi.org/10.1029/2009GC002389 en American Geophysical Union (AGU), Washington, DC Geochemistry Geophysics Geosystems 10 (6);; Q06006 info:eu-repo/semantics/openAccess ISSN: 1525-2027 Double-diffusive deep water circulation in an iron-meromictic lake info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:75 2023-11-06T10:52:59Z

Boettger, Tatjana Hiller, A. Junge, F.W. Mania, D. Kremenetski, C. 2009 The 7 m thick sediment profile at Plinz in northern Thuringia (central Germany) covering the time span between 10,000 and at least 8000 14C years BP (about 11,600-9000 cal BP) was studied using radiocarbon, stable isotopes and pollen analysis. The results reflect the very fast climatic transition from the Late Glacial to the Holocene as a change from cold and dry to warmer and wetter conditions. A short climatic deterioration during the Preboreal oscillation (PBO) at around 9800 14C years BP is clearly reflected by a sharp drop in the Pinus concentration accompanied by a considerable increase in Betula, Salix, various herbs and the distinct occurrence of aquatic plants. During the Preboreal stable isotopes of biogenic carbonate show several episodes with altered levels of atmospheric moisture. Continuous climatic improvement without any oscillations can be suggested for the period covering the end of Preboreal and the Boreal. application/pdf https://dx.doi.org/10.1016/j.quaint.2008.04.022 en Elsevier Quaternary International 203 (1-2);; 105 - 112 info:eu-repo/semantics/closedAccess ISSN: 1040-6182 Late Glacial/Early Holocene environmental changes in northern Thuringia, central Germany: stable isotope record, radiocarbon stratigraphy and vegetation history info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:76 2023-11-06T10:52:59Z

Boettger, Tatjana Friedrich, M. 2009 The study presents a new serial pooling method of shifted tree ring blocks for the building of isotope chronologies. This method combines the advantages of traditional 'serial' and 'intertree' pooling, and can be recommended for the construction of sub-regional long isotope chronologies with sufficient replication, and on annual resolution, especially for the case of extremely narrow tree rings. For Scots pines (Pinus sylvestris L., Khibiny Low Mountains, NW Russia) and Silver firs (Abies alba Mill., Franconia, Southern Germany), serial pooling of five consecutive tree rings seems appropriate because the species- and site-specific particularities lead to blurs of climate linkages in their tree rings for the period up to ca. five years back. An equivalent to a five-year running means that curve gained on the base annual data sets of single trees can be derived from the analysis of yearly shifted five-year blocks of consecutive tree rings, and therefore, with approximately 20% of the expense. Good coherence of d13C- and d18O-values between calculated means of annual total rings or late wood data and means of five-year blocks of consecutive total tree rings analysed experimentally on most similar material confirms this assumption. application/pdf https://dx.doi.org/10.1080/10256010802522218 en Isotopes in Environmental and Health Studies 45 (1);; 68 - 80 info:eu-repo/semantics/closedAccess ISSN: 1025-6016 carbon-13 dendrochronology oxygen-18 palaeoclimate pooling sampling strategy A new serial pooling method of shifted tree ring blocks to construct millennia long tree ring isotope chronologies with annual resolution info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:77 2024-04-13T00:56:32Z

Bombach, Petra 2009 application/pdf https://www.ufz.de/index.php?de=36795 de Helmholtz-Zentrum für Umweltforschung - UFZ, Leipzig info:eu-repo/semantics/openAccess ISSN: 2941-3885 Leipzig, Bibliothek, Reportsammlung, 00354493, 09-0941 F/E In situ Mikrokosmen zur Charakterisierung des mikrobiellen Schadstoffabbaus in einem BTEX kontaminierten Aquifer info:eu-repo/semantics/doctoralThesis https://purl.org/dc/dcmitype/Text

oai:ufz.de:78 2024-01-20T00:55:54Z

Borchardt, Dietrich Pusch, M. 2009 en Schweizerbart, Stuttgart info:eu-repo/semantics/closedAccess ISSN: 1612-166X ISBN: 9783510470631 The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions info:eu-repo/semantics/bookEdited https://purl.org/dc/dcmitype/Text

oai:ufz.de:79 2024-02-08T00:56:09Z

Borchardt, D. Pusch, M. Borchardt, Dietrich Pusch, M. 2009 The hyporheic zone was recognized as an ecologically discrete compartment between ground and running waters in aseries of scientific studies starting about half a century ago. Generally, the character and spatial extent of the hyporheic zone follow distinct gradients being dependent from geomorphic features and usually decrease in the longitudinal direction of rivers and from mountainous to lowland regions. The upper sediment layers of lotic systems are an essential habitat for aquatic communities, since a majority of stream dwelling organisms have Iife-cyc1e stages associated with the hyporheic zone. At the same time, intensive material exchange and transformation processes are located here. As a result, the abiotic conditions in the hyporheic zone usually deviate significantly when compared to surface f10ws and have to be understood as a result of complex processes inc1uding hydraulic exchange. transport and transformation of water constituents being controlled by both physical and biological processes. Our results presented in this special issue clearly indicate that the hyporheic zone has to be understood as a bottleneck for the ecological integrity in many streams and rivers. Therefore, in both river ecology and water resources management, the hyporheic zone has to be considered much more carefully and according to their reJevance for the ecological functioning of running waters. According to the complexity and dose links between physical and biological processes integrative, interdisciplinary research approaches are needed in order to further develop a process understanding with predictive capabilities for ecological functions. application/pdf en Schweizerbart, Stuttgart Borchardt, D., Pusch, M.;; The ecology of the hyporheic zone of running waters. Patterns, processes and bottleneck functions;; 1 - 7 info:eu-repo/semantics/closedAccess ISSN: 1612-166X ISBN: 9783510470631 Magdeburg, Bibliothek, 00377539, 10-2484 MA : Z Magdeburg, Bibliothek, 00401333, 11-0307 MA : Z An integrative, interdisciplinary research approach for the identification of patterns, processes and bottleneck functions of the hyporheic zone of running waters info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:80 2023-11-06T10:52:59Z

Borchardt, Dietrich Ehlert, T. Follner, Klaus Hoffmann, A. Griebler, C. Ilg, Christiane Koenzen, U. Meiners, G. Mohaupt, V. Neukirchen, B. Richter, S. Scholz, Mathias ; orcid:0000-0002-8463-9500 van de Weyer, K. 2009 en Umweltbundesamt (UBA) / Bund für Naturschutz (BfN) info:eu-repo/semantics/closedAccess Biodiversity of surface waters, floodplains and groundwater - Results of the Symposium, October 29./30.2008, Bonn, Germany info:eu-repo/semantics/conferenceProceedings https://purl.org/dc/dcmitype/Text

oai:ufz.de:81 2024-04-13T00:56:32Z

Born, Wanda 2009 application/pdf https://www.ufz.de/index.php?de=36795 en Helmholtz-Zentrum für Umweltforschung - UFZ, Leipzig info:eu-repo/semantics/openAccess ISSN: 2941-3885 Leipzig, Bibliothek, Reportsammlung, 00343794, 09-0204 F/E Ecological-economic assessment of biological invasions - a conceptual contribution on the basis of the concept of ecosystem services info:eu-repo/semantics/doctoralThesis https://purl.org/dc/dcmitype/Text

oai:ufz.de:82 2023-11-06T10:52:59Z

Bleeker, W. Hurka, H. Born, Wanda 2009 application/pdf de Universität Osnabrück, Osnabrück Bleeker, W., Hurka, H.;; Biologische Invasionen und Phytodiversität. Auswirkungen und Handlungsoptionen;; 26 info:eu-repo/semantics/closedAccess ISBN: n.a. Leipzig, Bibliothek, Hauptlesesaal, 00356176, 10-0021 DK: 581.9 Bio Gesundheitskosten durch die Beifuß-Ambrosie info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:83 2023-11-06T10:52:59Z

Borsdorf, Helko ; orcid:0000-0001-7959-7046 Neitsch, Kristian Eiceman, G.A. Stone, J.A. 2009 Ion mobility spectra for a series of mono-substituted toluenes and a series of mono-substituted anilines were obtained using three different methods of atmospheric pressure ionization including photoionization, chemical ionization from a 63Ni source, and chemical ionization from a corona discharge source. The product ion peak intensities were measured as functions of analyte concentration at 323 K in a purified air atmosphere. Two, and sometimes three, product ion peaks were observed in spectra from chemical ionization with the 63Ni source and it is suggested that the major peak, due to the protonated molecule, arose in both series by proton transfer from H3O+(H2O). The second peak with diminished intensity and longer drift time than the protonated molecule can be seen with the toluenes and was understood to be the NO+ adduct, formed from the reactant ion NO+(H2O). Electron transfer from the anilines to the latter ion yields the molecular ions, identified by having the same reduced mobility coefficients as the molecular ions produced by photoionization. The structure of these product ions was determined by investigations using the coupling of ion mobility spectrometry with atmospheric pressure photoionization and mass spectrometry (APPI-IMS-MS). The relative abundances of both the NO+ adducts with the toluenes and the molecular ions with the anilines are enhanced with a corona discharge source where relatively more NO+(H2O) is produced than in a 63Ni source. Ab initio calculations show that only the protonated anilines of all the product ions are significantly hydrated with 1 ppmv of moisture in the supporting atmosphere of the ion mobility spectrometer. application/pdf https://dx.doi.org/10.1016/j.talanta.2009.02.043 en Elsevier Talanta 78 (4-5);; 1464 - 1475 info:eu-repo/semantics/closedAccess ISSN: 0039-9140 Ion mobility spectrometry Atmospheric pressure ionization Mass spectrometry Isomeric compounds A comparison of the ion chemistry for mono-substituted toluenes and anilines by three methods of atmospheric pressure ionization with ion mobility spectrometry info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:84 2023-11-06T10:52:59Z

Borsdorf, Helko ; orcid:0000-0001-7959-7046 Neitsch, Kristian 2009 We investigated the influence of structural differences on the ionization pathways and drift behavior in ion mobility spectrometry for cyclic and aliphatic hydrocarbons with different functional groups. The sets of cyclic and aliphatic compounds had an identical mass or a mass difference of 2 Da. Therefore, mass effects can be neglected during the investigation of these compounds. Depending on the functional group, considerable differences were found in the detectable concentration ranges and in the number and position of product ion peaks in ion mobility spectra. The spectra of chlorinated compounds and hydrocarbons show no correlation to their calculated collisional cross sections. Differences in collisional cross section between cyclic and aliphatic substances investigated were only found to influence the drift times detected for amines and aliphatic aldehydes while complex ion chemistry was observed for the other substances. application/pdf https://dx.doi.org/10.1007/s12127-009-0023-z en Springer International Journal for Ion Mobility Spectrometry 12 (2);; 39 - 46 info:eu-repo/semantics/closedAccess ISSN: 1435-6163 on mobility spectrometry (IMS) Atmospheric pressure ionization (API) Ion mobility spectra of cyclic and aliphatic hydrocarbons with different substituents info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:85 2023-11-06T10:52:59Z

Borsdorf, Helko ; orcid:0000-0001-7959-7046 Roetering, S. Nazarov, E.G. Weickhardt, C. 2009 A procedure based on the coupling of pulsed laser desorption and differential mobility spectrometry is described which allows the fast screening of surfaces in respect to organic contaminations, in particular pesticides. We investigated the general capability of this technique for the rapid screening of pesticides from fruit surfaces. Although the coupling presented requires further optimization, the method developed permits the fast detection of pesticides from the surfaces of apples, grapes, tomatoes and pepper in the ng range. The initial results regarding the detection and quantification of a few prominent pesticides on different materials are presented. application/pdf https://dx.doi.org/10.1007/s12127-008-0014-5 en Springer International Journal for Ion Mobility Spectrometry 12 (1);; 15 - 22 info:eu-repo/semantics/closedAccess ISSN: 1435-6163 Pesticides Food analysis Laser desorption Differential mobility spectrometry Ion mobility spectrometry Rapid screening of pesticides from fruit surfaces: preliminary examinations using a laser desorption-differential mobility spectrometry coupling info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:86 2023-11-06T10:52:59Z

Bossdorf, Oliver Pigliucci, M. 2009 Thigmomorphogenesis, the characteristic phenotypic changes by which plants react to mechanical stress, is a widespread and probably adaptive type of phenotypic plasticity. However, little is known about its genetic basis and population variation. Here, we examine genetic variation for thigmomorphogenesis within and among natural populations of the model system Arabidopsis thaliana. Offspring from 17 field-collected European populations was subjected to three levels of mechanical stress exerted by wind. Overall, plants were remarkably tolerant to mechanical stress. Even high wind speed did not significantly alter the correlation structure among phenotypic traits. However, wind significantly affected plant growth and phenology, and there was genetic variation for some aspects of plasticity to wind among A. thaliana populations. Our most interesting finding was that phenotypic traits were organized into three distinct and to a large degree statistically independent covariance modules associated with plant size, phenology, and growth form, respectively. These phenotypic modules differed in their responsiveness to wind, in the degree of genetic variability for plasticity, and in the extent to which plasticity affected fitness. It is likely, therefore, that thigmomorphogenesis in this species evolves quasi-independently in different phenotypic modules. application/pdf https://dx.doi.org/10.1007/s10682-008-9263-3 en Evolutionary Ecology Ltd., Tucson, AZ Evolutionary Ecology 23 (5);; 669 - 685 info:eu-repo/semantics/closedAccess ISSN: 0269-7653 Genetic differentiation Mechanical stimulation Phenotypic integration Phenotypic plasticity Thigmomorphogenesis Plasticity to wind is modular and genetically variable in Arabidopsis thaliana info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:87 2023-11-06T10:52:59Z

Bovet, Jana 2009 application/pdf de Informationskreis für Raumplanung (IfR), Dortmund RaumPlanung 142;; 16 - 20 info:eu-repo/semantics/closedAccess ISSN: 0176-7534 Rechtliche Steuerungsoptionen des Siedlungsflächenverbrauchs. Eine vergleichende Untersuchung zur regionalplanerischen Praxis info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:89 2023-11-06T10:52:59Z

Böhme, Alexander Thaens, Diana Paschke, Albrecht Schüürmann, Gerrit 2009 Glutathione (GSH) is a soft nucleophile and, as such, can be used to sense the reactivity of electrophilic agents toward the thiol group and other electron-rich sites of molecular structures. A new kinetic GSH chemoassay is introduced that employs a photometric method to quantify GSH loss and enables an efficient determination of second-order rate constants, kGSH, of the reaction between electrophilic substances and GSH. Comparison with an existing 2 h static assay shows that the new kinetic variant is superior with respect to the detectable range of electrophilic reactivity and to confounding factors such as additional GSH loss due to oxidation. Analysis of the chemoassay degradation kinetics provides insight into the characteristic reaction times and the contributions of GSH-electrophile Michael addition and GSH oxidation to the overall GSH loss. For 15 a,ß-unsaturated ketones, nine acrylates, and two propiolates acting as Michael acceptors, the measured kGSH values span ca. 5 orders of magnitude. Moreover, log kGSH correlates with the compounds' toxicity toward the ciliates Tetrahymena pyriformis in terms of 48 h log EC50 (50% growth inhibition) values, yielding a squared correlation coefficient (r2) of 0.91 and a root-mean-square error of 0.30 log units. It shows that for these and related compounds, aquatic toxicity is driven by electrophilic reactivity. The findings demonstrate that the kinetic GSH chemoassay can be used as an efficient tool to analyze, interpret, and predict correspondingly reactive toxicity in the context of qualitative and quantitative structure-activity relationship studies and as a nonanimal tool of integrated testing strategies for REACH to screen compounds for excess toxicity. application/pdf https://dx.doi.org/10.1021/tx800492x en American Chemical Society (ACS), Washington, DC Chemical Research in Toxicology 22 (4);; 742 - 750 info:eu-repo/semantics/closedAccess ISSN: 0893-228X Kinetic glutathione chemoassay to quantify thiol reactivity of organic electrophiles - application to α,β-unsaturated ketones, acrylates, and propiolates info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:90 2023-11-06T10:52:59Z

Böhme, Alexander Thaens, Diana Paschke, Albrecht Schüürmann, Gerrit 2009 no abstract application/pdf https://dx.doi.org/10.1016/j.toxlet.2009.06.308 en Elsevier Toxicology Letters 189 (Suppl. 1);; S62 - S62 info:eu-repo/semantics/closedAccess ISSN: 0378-4274 Kinetic glutathione chemoassay-A non-animal component of integrated testing strategies to identify compounds with an electrophilic potential for reactive toxicity info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:91 2023-11-23T00:55:17Z

Scholz, M. Henle, K. Dziock, F. Stab, S. Foeckler, F. Böhnke, R. Geyer, Stefan ; orcid:0000-0003-1746-9019 2009 de Ulmer, Stuttgart Scholz, M., Henle, K., Dziock, F., Stab, S., Foeckler, F.;; Entwicklung von Indikationssystemen am Beispiel der Elbaue;; 101 - 126 info:eu-repo/semantics/closedAccess ISBN: 9783800144273 Leipzig, Bibliothek, Hauptlesesaal, 00354806, 09-1017 DK: 502.6/.7 Ent Halle, Bibliothek, 00354967, 09-1018 Magdeburg, Bibliothek, 00355124, 09-1019 MA : Bi 40 Hydrodynamik info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:92 2023-11-06T10:52:59Z

Böl, M. Möhle, R.B. Haesner, Marian Neu, Thomas Horn, H. Krull, R. 2009 In this work, a three-dimensional model of fluid-structure interactions (FSI) in biofilm systems is developed in order to simulate biofilm detachment as a result of mechanical processes. Therein, fluid flow past the biofilm surface results in a mechanical load on the structure which in turn causes internal stresses in the biofilm matrix. When the strength of the matrix is exceeded parts of the structure are detached. The model is used to investigate the influence of several parameters related to the mechanical strength of the biofilm matrix, Young's modulus, Reynolds number, and biofilm structure on biofilm detachment. Variations in biofilm strength and flow conditions significantly influence the simulation outcome. With respect to structural properties the model is widely independent from a change of Young's modulus. A further result of this work indicates that the change of biofilm structure due to growth or other processes will significantly change the stress distribution in the biofilm and thereby the detachment rate. An increase of the mechanical load by increasing fluid flow results in a flat surface of the remaining biofilm structure. It is concluded that the change of structure during biofilm development is the key determinant in terms of the detachment behavior. Biotechnol. Bioeng. 2009;103: 177-186. © 2008 Wiley Periodicals, Inc. application/pdf https://dx.doi.org/10.1002/bit.22235 en Wiley Biotechnology and Bioengineering 103 (1);; 177 - 186 info:eu-repo/semantics/closedAccess ISSN: 0006-3592 biofilm biofilm detachment biofilm modeling fluid-structure interaction tubular flow CLSM 3D finite element model of biofilm detachment using real biofilm structures from CLSM data info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:93 2023-11-06T10:52:59Z

Böselt, I. Römpler, H. Hermsdorf, T. Thor, D. Busch, Wibke ; orcid:0000-0002-5497-6266 Schulz, A. Schöneberg, T. 2009 Mammals adapted to a great variety of habitats with different accessibility to water. In addition to changes in kidney morphology, e.g. the length of the loops of Henle, several hormone systems are involved in adaptation to limited water supply, among them the renal-neurohypophysial vasopressin/vasopressin receptor system. Comparison of over 80 mammalian V2 vasopressin receptor (V2R) orthologs revealed high structural and functional conservation of this key component involved in renal water reabsorption. Although many mammalian species have unlimited access to water there is no evidence for complete loss of V2R function indicating an essential role of V2R activity for survival even of those species. In contrast, several marsupial V2R orthologs show a significant increase in basal receptor activity. An increased vasopressin-independent V2R activity can be interpreted as a shift in the set point of the renal-neurohypophysial hormone circuit to realize sufficient water reabsorption already at low hormone levels. As found in other desert mammals arid-adapted marsupials show high urine osmolalities. The gain of basal V2R function in several marsupials may contribute to the increased urine concentration abilities and, therefore, provide an advantage to maintain water and electrolyte homeostasis under limited water supply conditions. application/pdf https://dx.doi.org/10.1371/journal.pone.0005573 en Public Library of Science (PLoS) PLoS ONE 4 (5);; e5573 info:eu-repo/semantics/openAccess ISSN: 1932-6203 Involvement of the V2 vasopressin receptor in adaptation to limited water supply info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:94 2023-11-06T10:52:59Z

Brack, Werner Apitz, S.E. Borchardt, Dietrich Brils, J. Cardoso, A.C. Foekema, E.M. van Gils, J. Jansen, S. Harris, B. Hein, Michaela Heise, S. Hellsten, S. de Maagd, P.G.-J. Müller, Diana Panov, V.E. Posthuma, L. Quevauviller, P. Verdonschot, P.F.M. von der Ohe, Peter 2009 The EU Water Framework Directive (WFD) requires a good chemical and ecological status by 2015. Integrated, risk-based management of river basins is presumed to be an appropriate tool to achieve that goal. The approach of focusing on distinct hazardous substances in surface waters together with investment in Best Available Technology (BAT) was successful in significantly reducing excessive contamination of several European river basins. The use of the concept of chemical status in the WFD is based on this experience and focuses on chemicals for which there is a general agreement that they should be phased out. However, the chemical status, based on a list of 33 priority pollutants, considers only a small portion of possible toxicants and does not prevent ecotoxicological stress in general. Recommendations for a further development of this concept are: 1) to focus on river basin-specific toxicants, 2) to regularly update priority lists with a focus on emerging toxicants, 3) to reduce monitoring efforts for compounds no longer in use, where appropriate, 4) to consider state-of-the-art mixture toxicity concepts and bioavailability to link chemical and ecological status, and 5) to add a short list of priority effects and to develop Environmental Quality Standards for these effects. The ecological status reflected by ecological quality ratios is a second leading principle of the WFD. While on the European scale the improvement of hydromorphological conditions and control of eutrophication are crucial to achieve a good ecological status, on a local and regional scale managers have to deal with multiple pressures. On this scale, toxic pollution may play an important role. Strategic research is necessary 1) to identify dominant pressures, 2) to predict multi-stressor effects, 3) to develop stressor- and type-specific metrics of pressures, and 4) to better understand the ecology of recovery. The concept of reference conditions to define the ecological status is hard to apply and tends to ignore the fact that ecosystems can be highly dynamic. A better understanding of ecosystem responses to changes as well as early warning systems and concepts to discriminate disturbances from natural variation are required. Because ecosystems are closely interconnected an integrated monitoring, diagnosis and stressors-based management of the whole water-, sediment-, groundwater- and soil system is required including land-use and the interaction with a changing climate. Extending this holistic approach beyond a consideration of existing pressures by anticipating on future ones to protect the aquatic environment sustainably is one of the big challenges. application/pdf https://dx.doi.org/10.1897/ieam_2008-024.1 en Wiley Integrated Environmental Assessment and Management 5 (1);; 5 - 10 info:eu-repo/semantics/closedAccess ISSN: 1551-3777 Chemical status ecological status EU Water Framework Directive holistic management ecosystem Towards a holistic and risk-based management of European river basins info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:95 2023-11-06T10:52:59Z

Brack, Werner Posthuma, L. Hein, Michaela von der Ohe, Peter 2009 application/pdf https://dx.doi.org/10.1897/1551-3793-5.1.2 en Wiley Integrated Environmental Assessment and Management 5 (1);; 2 - 4 info:eu-repo/semantics/closedAccess ISSN: 1551-3777 European river basins at risk info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:96 2023-11-06T10:52:59Z

Brack, Werner Bandow, Nicole Schwab, Katrin Schulze, Tobias ; orcid:0000-0002-9744-8914 Streck, Georg 2009 Ignoring bioavailability in effect-directed analysis (EDA) of sediments may bias prioritization of toxic fractions and compounds towards lipophilic toxic fractions, which are hardly bioavailable. While EDA in benthic organisms is limited to answering specific questions, bioaccessibility-directed extraction (BDE) appears generally applicable as a first step in sediment EDA. However, big differences in the efficiency of such extraction methods suggest the need for standardized criteria to simulate bioaccessibility. The most promising approach to simulate desorption and partitioning and thus bioavailability in sediments may be to combine BDE with partition-based dosing techniques. application/pdf https://dx.doi.org/10.1016/j.trac.2009.02.010 en Elsevier TrAC-Trends in Analytical Chemistry 28 (5);; 543 - 549 info:eu-repo/semantics/closedAccess ISSN: 0165-9936 Bioaccessibility-directed extraction Bioavailability Cyclodextrin Effect-directed analysis Organic toxicant Partition-based dosing Sediment Silicone rod TENAX Toxicity Bioavailability in effect-directed analysis of organic toxicants in sediments info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:97 2026-02-04T00:53:01Z

Brand, W.A. Coplen, T.B. Aerts-Bijma, A. Böhlke, J.K. Gehre, Matthias ; orcid:0000-0001-7177-0422 Geilmann, H. Gröning, M. Jansen, H.G. Meijer, H.A.J. Mroczkowski, S.J. Qi, H. Soergel, K. Stuart-Williams, H. Weise, Stephan Werner, R.A. 2009 Internationally distributed organic and inorganic oxygen isotopic reference materials have been calibrated by six laboratories carrying out more than 5300 measurements using a variety of hightemperature conversion techniques (HTC)a in an evaluation sponsored by the International Union of Pure and Applied Chemistry (IUPAC). To aid in the calibration of these reference materials, which span more than 125%, an artificially enriched reference water (d18O of R78.91%) and two barium sulfates (one depleted and one enriched in 18O) were prepared and calibrated relative to VSMOW2b and SLAP reference waters. These materials were used to calibrate the other isotopic reference materials in this study, which yielded:Reference material d18O and estimated combined uncertaintyIAEA-602 benzoic acid þ71.280.36%USGS35 sodium nitrate þ56.810.31%IAEA-NO-3 potassium nitrate þ25.320.29%IAEA-601 benzoic acid þ23.140.19%IAEA-SO-5 barium sulfate þ12.130.33%NBS 127 barium sulfate þ8.590.26%VSMOW2 water 0%IAEA-600 caffeine 3.480.53%IAEA-SO-6 barium sulfate 11.350.31%USGS34 potassium nitrate 27.780.37%SLAP water 55.5%According to IUPAC rules delta is defined as dB,RŒrB/rR - 1 (with rB being the isotope amount ratio in sample B and rR in reference R, without the extraneous factor 1000). In this paper we express the corresponding delta values either as 103 dB,R or we use the % sign behind the number, depending on space availability and readability.The seemingly large estimated combined uncertainties arise from differences in instrumentation and methodology and difficulty in accounting for all measurement bias. They are composed of the 3-fold standard errors directly calculated from the measurements and provision for systematic errors discussed in this paper. A primary conclusion of this study is that nitrate samples analyzed for d18O should be analyzed with internationally distributed isotopic nitrates, and likewise for sulfates and organics. Authors reporting relative differences of oxygen-isotope ratios (d18O) of nitrates, sulfates, or organic material should explicitly state in their reports the d18O values of two or more internationally distributed nitrates (USGS34, IAEA-NO-3, and USGS35), sulfates (IAEA-SO-5, IAEA-SO-6, and NBS 127), or organic material (IAEA-601 benzoic acid, IAEA-602 benzoic acid, and IAEA-600 caffeine), as appropriate to the material being analyzed, had these reference materials been analyzed with unknowns. This procedure ensures that readers will be able to normalize the d18O values at a later time should it become necessary.The high-temperature reduction technique for analyzing d18O and d2H is not as widely applicable as the well-established combustion technique for carbon and nitrogen stable isotope determination. To obtain the most reliable stable isotope data, materials should be treated in an identical fashion; within the same sequence of analyses, samples should be compared with working reference materials that are as similar in nature and in isotopic composition as feasible. application/pdf https://dx.doi.org/10.1002/rcm.3958 en Wiley Rapid Communications in Mass Spectrometry 23 (7);; 999 - 1019 info:eu-repo/semantics/closedAccess ISSN: 0951-4198 Comprehensive inter-laboratory calibration of reference materials for δ18O versus VSMOW using various on-line high-temperature conversion techniques info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:98 2023-11-06T10:52:59Z

Bräuer, Karin Kämpf, H. Strauch, Gerhard 2009 application/pdf https://dx.doi.org/10.1029/2009gl039615 en American Geophysical Union (AGU), Washington, DC Geophysical Research Letters 36;; L17309 info:eu-repo/semantics/openAccess ISSN: 0094-8276 Earthquake swarms in non-volcanic regions: what fluids have to say info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text

oai:ufz.de:99 2023-11-06T10:52:59Z

Breuste, J. Kozová, M. Finka, M. Breuste, J. Haase, Dagmar 2009 application/pdf en Breuste, J., Kozová, M., Finka, M.;; European landscapes in transformation: challenges for landscape ecology and management; European IALE Conference 2009, Salzburg, Austria, July, 12-16;; 516 - 521 info:eu-repo/semantics/closedAccess ISBN: 9788022731003 Workshop 2: Challenges for urban landscape in Europe info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:100 2023-11-06T10:52:59Z

Brumme, R. Khanna, P.K. Brumme, R. Raubuch, M. Priess, Jörg Wang, C.P. Anderson, T.-H. 2009 Micro-organisms (bacteria, fungi) contribute to more than 90% of the carbon dioxide evolved during decomposition of forest litter (Schaefer 1991), indicating their role in the element cycling in forest ecosystems. Nitrogen is mostly cycled between primary producers and decomposer biota. The activity and growth of micro-organisms depend on carbon and nutrient supply and the physico-chemical environment because of their high surface area/volume ratio of microbial bodies (Hattori and Hattori 1976; Paul and Clark 1996). Soil acidity has often been shown to reduce microbial biomass (Cmic) and to increase metabolic respiration (qCO2, ratio between microbial-respiration-C and microbial-biomass-C) in the surface mineral soil which was interpreted as an increased stress on micro-organisms living in acid soils (Anderson and Domsch 1993; Anderson, Chap. 20, this volume). In addition to the chemical stress, soil acidity may change the litter quality, litter amount and their distribution in the soil profile by acid sensitive earthworms. Quality and amount of litter determine the amount of micro-organisms that would live on the organic matter, and is indicated by the fraction of Cmic in organic carbon (Corg) (Anderson and Domsch 1986). Another effect of soil acidity relates to an increase in bacterial respiration with increasing pH. Less is known of microbial biomass and the mentioned relationships in the surface organic layer and deeper soil horizons. Here, we provide depthwise distribution of microbial carbon (Cmic), microbial nitrogen (Nmic), metabolic quotient (qCO2), the fraction of Cmic in Corg (Cmic-to-Corg ratio) and the fraction of fungal respiration of soil respiration in three beech forest soils, the Göttinger Wald, Zierenberg, and the Solling sites (for site description see Part A). The following questions will be addressed. (1) Does soil acidity reduce the microbial biomass and the qCO2 value in the acid soil profile at Solling site compared to the less acid soils at Göttinger Wald and Zierenberg sites? (2) Does better substrate quality at Göttinger Wald and Zierenberg sites increase the Cmic-to-Corg ratio? (3) What is the contribution of bacteria and fungi to soil respiration and how does soil acidity affect these contributions? application/pdf https://dx.doi.org/10.1007/978-3-642-00340-0_6 en Springer, Berlin, Heidelberg, New York Brumme, R., Khanna, P.K.;; Functioning and management of European beech ecosystems;; 87 - 92 info:eu-repo/semantics/closedAccess ISSN: 0070-8356 ISBN: 9783642003394 Microbial biomass info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text

oai:ufz.de:101 2023-11-06T10:52:59Z

Brumme, R. Khanna, P.K. Brumme, R. Priess, Jörg Wang, C.P. Raubuch, M. Steinmetz, G. Meyer, H. 2009 Carbon and nitrogen are squantitatively important elements in forest ecosystems. Most of the carbon and nitrogen are stored in the soil and have a long turnover time. Only a small fraction of the N-pool is cycled every year through growth and litter fall and mineralisation of litter. Industrialisation has caused high acid and nitrogen inputs to ecosystems which have affected carbon and nitrogen stocks and mineralisation processes in forest ecosystems. In addition, global change of temperature and precipitation will also have a direct influence on carbon and nitrogen cycles in the short-term and on their stocks in the long-term. In order to detect measurable changes in the carbon and nitrogen stocks of forest soils, several decades and sometimes centuries may be needed because they have by nature high spatial variability and occur in large stocks. Therefore, it is very difficult to obtain information on fluxes of these elements by measuring changes in the bulk stocks. Direct measurements of input and output fluxes may provide useful information to assess any changes of the bulk stocks, and on understanding of human-induced changes in the mineralisation processes, as long as the values of input and output fluxes can be accurately measured. application/pdf https://dx.doi.org/10.1007/978-3-642-00340-0_13 en Springer, Berlin, Heidelberg, New York Brumme, R., Khanna, P.K.;; Functioning and management of European beech ecosystems;; 231 - 251 info:eu-repo/semantics/closedAccess ISSN: 0070-8356 ISBN: 9783642003394 Nitrogen and carbon transformations info:eu-repo/semantics/bookPart https://purl.org/dc/dcmitype/Text 3624076fce3051ab4bd96ddc741ecfde