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The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe
AG. Bravo, DN. Kothawala, K. Attermeyer, E. Tessier, P. Bodmer, JLJ. Ledesma, J. Audet, JP. Casas-Ruiz, N. Catalán, S. Cauvy-Fraunié, M. Colls, A. Deininger, VV. Evtimova, JA. Fonvielle, T. Fuß, P. Gilbert, S. Herrero Ortega, L. Liu, C....
Jazyk angličtina Země Anglie, Velká Británie
Typ dokumentu časopisecké články, práce podpořená grantem
- MeSH
- chemické látky znečišťující vodu analýza chemie MeSH
- ekosystém MeSH
- jezera chemie MeSH
- methylortuťné sloučeniny analýza chemie MeSH
- monitorování životního prostředí metody MeSH
- půda chemie MeSH
- řeky chemie MeSH
- rtuť analýza chemie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Evropa MeSH
Large-scale studies are needed to identify the drivers of total mercury (THg) and monomethyl-mercury (MeHg) concentrations in aquatic ecosystems. Studies attempting to link dissolved organic matter (DOM) to levels of THg or MeHg are few and geographically constrained. Additionally, stream and river systems have been understudied as compared to lakes. Hence, the aim of this study was to examine the influence of DOM concentration and composition, morphological descriptors, land uses and water chemistry on THg and MeHg concentrations and the percentage of THg as MeHg (%MeHg) in 29 streams across Europe spanning from 41°N to 64 °N. THg concentrations (0.06-2.78 ng L-1) were highest in streams characterized by DOM with a high terrestrial soil signature and low nutrient content. MeHg concentrations (7.8-159 pg L-1) varied non-systematically across systems. Relationships between DOM bulk characteristics and THg and MeHg suggest that while soil derived DOM inputs control THg concentrations, autochthonous DOM (aquatically produced) and the availability of electron acceptors for Hg methylating microorganisms (e.g. sulfate) drive %MeHg and potentially MeHg concentration. Overall, these results highlight the large spatial variability in THg and MeHg concentrations at the European scale, and underscore the importance of DOM composition on mercury cycling in fluvial systems.
Catalan Institute for Water Research Girona Spain
Department of Ecology and Environmental Science Umeå University Umeå Sweden
Department of Life and Environmental Sciences Bournemouth University UK
Ecohydrology Leibniz Institute of Freshwater Ecology and Inland Fisheries Berlin Germany
Institute for Environmental Sciences University of Koblenz Landau Landau Germany
IRSTEA UR RiverLy Centre de Lyon Villeurbanne Villeurbanne Cedex France
Limnology Department of Ecology and Genetics Uppsala University Uppsala Sweden
Microbial Resource Management Institute of Microbiology University of Innsbruck Innsbruck Austria
Research Centre in Biodiversity and Genetic Resources University of Porto Porto Portugal
River and Conservation Research Institute of Ecology University of Innsbruck Innsbruck Austria
Citace poskytuje Crossref.org
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- $a Bravo, Andrea G $u Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA), Spanish National Research Council (CSIC), Barcelona, Spain. Electronic address: jandriugarcia@gmail.com.
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- $a The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe / $c AG. Bravo, DN. Kothawala, K. Attermeyer, E. Tessier, P. Bodmer, JLJ. Ledesma, J. Audet, JP. Casas-Ruiz, N. Catalán, S. Cauvy-Fraunié, M. Colls, A. Deininger, VV. Evtimova, JA. Fonvielle, T. Fuß, P. Gilbert, S. Herrero Ortega, L. Liu, C. Mendoza-Lera, J. Monteiro, JR. Mor, M. Nagler, GH. Niedrist, AC. Nydahl, A. Pastor, J. Pegg, C. Gutmann Roberts, F. Pilotto, AP. Portela, CR. González-Quijano, F. Romero, M. Rulík, D. Amouroux,
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- $a Large-scale studies are needed to identify the drivers of total mercury (THg) and monomethyl-mercury (MeHg) concentrations in aquatic ecosystems. Studies attempting to link dissolved organic matter (DOM) to levels of THg or MeHg are few and geographically constrained. Additionally, stream and river systems have been understudied as compared to lakes. Hence, the aim of this study was to examine the influence of DOM concentration and composition, morphological descriptors, land uses and water chemistry on THg and MeHg concentrations and the percentage of THg as MeHg (%MeHg) in 29 streams across Europe spanning from 41°N to 64 °N. THg concentrations (0.06-2.78 ng L-1) were highest in streams characterized by DOM with a high terrestrial soil signature and low nutrient content. MeHg concentrations (7.8-159 pg L-1) varied non-systematically across systems. Relationships between DOM bulk characteristics and THg and MeHg suggest that while soil derived DOM inputs control THg concentrations, autochthonous DOM (aquatically produced) and the availability of electron acceptors for Hg methylating microorganisms (e.g. sulfate) drive %MeHg and potentially MeHg concentration. Overall, these results highlight the large spatial variability in THg and MeHg concentrations at the European scale, and underscore the importance of DOM composition on mercury cycling in fluvial systems.
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