globalchange  > 气候变化事实与影响
DOI: 10.1002/2017GB005749
Scopus记录号: 2-s2.0-85031758536
论文题名:
Widespread Increases in Iron Concentration in European and North American Freshwaters
作者: Björnerås C; , Weyhenmeyer G; A; , Evans C; D; , Gessner M; O; , Grossart H; -P; , Kangur K; , Kokorite I; , Kortelainen P; , Laudon H; , Lehtoranta J; , Lottig N; , Monteith D; T; , Nõges P; , Nõges T; , Oulehle F; , Riise G; , Rusak J; A; , Räike A; , Sire J; , Sterling S; , Kritzberg E; S
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期:10
起始页码: 1488
结束页码: 1500
语种: 英语
英文关键词: browning ; climate change ; freshwaters ; iron ; trends
Scopus关键词: biogeochemical cycle ; biogeochemistry ; climate change ; concentration (composition) ; coniferous tree ; freshwater environment ; geographical distribution ; iron ; organic carbon ; river basin ; trend analysis ; Europe ; North America ; Coniferophyta
英文摘要: Recent reports of increasing iron (Fe) concentrations in freshwaters are of concern, given the fundamental role of Fe in biogeochemical processes. Still, little is known about the frequency and geographical distribution of Fe trends or about the underlying drivers. We analyzed temporal trends of Fe concentrations across 340 water bodies distributed over 10 countries in northern Europe and North America in order to gain a clearer understanding of where, to what extent, and why Fe concentrations are on the rise. We found that Fe concentrations have significantly increased in 28% of sites, and decreased in 4%, with most positive trends located in northern Europe. Regions with rising Fe concentrations tend to coincide with those with organic carbon (OC) increases. Fe and OC increases may not be directly mechanistically linked, but may nevertheless be responding to common regional-scale drivers such as declining sulfur deposition or hydrological changes. A role of hydrological factors was supported by covarying trends in Fe and dissolved silica, as these elements tend to stem from similar soil depths. A positive relationship between Fe increases and conifer cover suggests that changing land use and expanded forestry could have contributed to enhanced Fe export, although increases were also observed in nonforested areas. We conclude that the phenomenon of increasing Fe concentrations is widespread, especially in northern Europe, with potentially significant implications for wider ecosystem biogeochemistry, and for the current browning of freshwaters. ©2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77700
Appears in Collections:气候变化事实与影响

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作者单位: Aquatic Ecology, Department of Biology, Lund University, Lund, Sweden; Ecology and Genetics/Limnology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden; Centre for Ecology and Hydrology, Environment Centre Wales, Bangor, United Kingdom; Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany; Department of Ecology, Berlin Institute of Technology (TU Berlin), Berlin, Germany; Institute of Biochemistry and Biology, Potsdam University, Potsdam, Germany; Centre for Limnology, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Rannu, Estonia; Institute of Biology, University of Latvia, Riga, Latvia; Finnish Environment Institute, Helsinki, Finland; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden; Trout Lake Station, Center for Limnology, University of Wisconsin, Madison, WI, United States; NERC Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom; Centre for Limnology, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia; Czech Geological Survey, Klárov 3, Prague, Czech Republic and Global Change Research Institute CAS, Brno, Czech Republic; Norwegian University of Life Sciences (NMBU), Ås, Norway; Dorset Environmental Science Centre, Ontario Ministry of the Environment and Climate Change, Dorset, ON, Canada; Inland Waters Division, Latvian Environment Geology and Meteorology Centre, Riga, Latvia; Hydrology Research Group, Department of Earth Sciences, Dalhousie University, Halifax, NS, Canada

Recommended Citation:
Björnerås C,, Weyhenmeyer G,A,et al. Widespread Increases in Iron Concentration in European and North American Freshwaters[J]. Global Biogeochemical Cycles,2017-01-01,31(10)
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