1. Widespread diminishing anthropogenic effects on calcium in freshwaters
- Author
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Weyhenmeyer, Gesa A., Hartmann, Jens, Hessen, Dag O., Kopáček, Jiří, Hejzlar, Josef, Jacquet, Stéphan, Hamilton, Stephen K., Verburg, Piet, Leach, Taylor H., Schmid, Martin, Flaim, Giovanna, Nõges, Tiina, Nõges, Peeter, Wentzky, Valerie C., Rogora, Michela, Rusak, James A., Kosten, Sarian, Paterson, Andrew M., Teubner, Katrin, Higgins, Scott N., Lawrence, Gregory, Kangur, Külli, Kokorite, Ilga, Cerasino, Leonardo, Funk, Clara, Harvey, Rebecca, Moatar, Florentina, de Wit, Heleen A., Zechmeister, Thomas, Centre for Limnology. Institute of Agricultural and Environmental Sciences, Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), National Institute of Water and Atmospheric Research [Wellington] (NIWA), Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf] (EAWAG), Research and Innovation Centre [Italie], Fondazione Edmund Mach - Edmund Mach Foundation [Italie] (FEM), Estonian University of Life Sciences, Inst Environm & Agr Sci, Ctr Limnol, Rannu, Tartu Country, Estonia, Institute of Agricultural and Environmental Sciences, Centre for Limnology, Estonian University of Life Sciences (EMU), Consiglio Nazionale delle Ricerche (CNR), Program in Genetics and Genomic Biology, Hospital for Sick Children-University of Toronto McLaughlin Centre, Department of Limnology and Bio-Oceanography, Universität Wien, International Institute for Sustainable Development (IISD), Institute of Agricultural and Environmental Sciences, GéoHydrosystèmes COntinentaux (GéHCO EA6293), Université de Tours (UT), Swedish Research Council2016-04153European Union (EU)643052Knut and Alice Wallenberg Foundation (KAW project) German Research Foundation (DFG)390683824, LIMNOLOGY DEPARTMENT OF ECOLOGY AND GENETICS UPPSALA UNIVERSITY UPPSALA SWE, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Institute for Geology, Universität Hamburg, Center for Earth System Research and Sustainability (CEN), Bundesstrasse 55, 20146, Hamburg, Germany, University of Oslo (UiO), Institute of Hydrobiology [Sádkách] (BIOLOGY CENTRE CAS), Biology Centre of the Czech Academy of Sciences (BIOLOGY CENTRE CAS), Czech Academy of Sciences [Prague] (CAS)-Czech Academy of Sciences [Prague] (CAS), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), W. K. Kellogg Biological Station (KBS), Michigan State University [East Lansing], Michigan State University System-Michigan State University System, National Institute of Water and Atmosphere [Hamilton] (NIWA), RENSSELAER POLYTECHNIC INSTITUTE TROY USA, Department of Sustainable Agro-Ecosystems and Bioresources, Edmund Mach Foundation (FEM), Institute of Agricultural and Environmental Sciences (IAES), Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ), CNR Water Research Institute (IRSA), Dorset Environmental Science Centre, Ontario Ministry of the Environment and Climate Change, Department of Aquatic Ecology & Environmental Biology, Radboud university [Nijmegen], University of Vienna [Vienna], IISD EXPERIMENTAL LAKES AREA CAN, NEW YORK WATER SCIENCE CENTER US GEOLOGICAL SURVEY USA, CENTRE FOR LIMNOLOGY INSTITUTE OF AGRICULTURAL AND ENVIRONMENTAL SCIENCES OF ESTONIAN UNIVERSITY OF LIFE SCIENCES EST, University of Latvia (LU), U.S. Environmental Protection Agency, VERMONT DEPARTMENT OF ENVIRONMENTAL SERVICES USA, RiverLy (UR Riverly), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Norwegian Institute for Water Research (NIVA), BIOLOGICAL STATION LAKE NEUSIEDL ILLMITZ AUT, and Université de Tours
- Subjects
[SDV]Life Sciences [q-bio] ,[SDE.MCG]Environmental Sciences/Global Changes ,alkalinity ,lcsh:Medicine ,Article ,Isolation ,anthropogenic effects ,Environmental impact ,biogeochemistry ,anthropique ,Lake Geneva Abbreviations: BALO: Bdellovibrio and Like Organisms ,Settore BIO/07 - ECOLOGIA ,Element cycles ,freshwaters ,Bdellovibrio sp ,freshwater ,lcsh:Science ,Ekologi ,calcium ,Ecology ,BSA: Bovine Serum Albumin ,lcsh:R ,trend ,eau douce ,[SDU]Sciences of the Universe [physics] ,Bacterial Predator ,SDS: Sodium Dodecyl Sulfate ,[SDE]Environmental Sciences ,articles ,Freshwater ecology ,lcsh:Q ,Preys - Abstract
Calcium (Ca) is an essential element for almost all living organisms. Here, we examined global variation and controls of freshwater Ca concentrations, using 440 599 water samples from 43 184 inland water sites in 57 countries. We found that the global median Ca concentration was 4.0 mg L−1 with 20.7% of the water samples showing Ca concentrations ≤ 1.5 mg L−1 , a threshold considered critical for the survival of many Ca-demanding organisms. Spatially, freshwater Ca concentrations were strongly and proportionally linked to carbonate alkalinity, with the highest Ca and carbonate alkalinity in waters with a pH around 8.0 and decreasing in concentrations towards lower pH. However, on a temporal scale, by analyzing decadal trends in >200 water bodies since the 1980s, we observed a frequent decoupling between carbonate alkalinity and Ca concentrations, which we attributed mainly to the influence of anthropogenic acid deposition. As acid deposition has been ameliorated, in many freshwaters. Financial support was received from the Swedish Research Council (Grant No. 2016-04153), the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 643052 (C-CASCADES project), and from the Knut and Alice Wallenberg Foundation (KAW project). This work is part of the international Global Lake Ecological Observatory Network (GLEON). The work of J.H. is supported by the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy – EXC 20 2037 ‘Climate, Climatic Change, and Society’ – Project Number: 390683824, contribution to the Center for Earth System Research and Sustainability (CEN) of Universität Hamburg. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. We thank all data providers, listed in Supplementary Table 1. Financial support was received from the Swedish Research Council (Grant No. 2016-04153), the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 643052 (C-CASCADES project), and from the Knut and Alice Wallenberg Foundation (KAW project). This work is part of the international Global Lake Ecological Observatory Network (GLEON). The work of J.H. is supported by the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy – EXC 20 2037 ‘Climate, Climatic Change, and Society’ – Project Number: 390683824, contribution to the Center for Earth System Research and Sustainability (CEN) of Universität Hamburg. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. We thank all data providers, listed in Supplementary Table 1.
- Published
- 2019
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