globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14129
Scopus记录号: 2-s2.0-85045844439
论文题名:
Global change-driven effects on dissolved organic matter composition: Implications for food webs of northern lakes
作者: Creed I.F.; Bergström A.-K.; Trick C.G.; Grimm N.B.; Hessen D.O.; Karlsson J.; Kidd K.A.; Kritzberg E.; McKnight D.M.; Freeman E.C.; Senar O.E.; Andersson A.; Ask J.; Berggren M.; Cherif M.; Giesler R.; Hotchkiss E.R.; Kortelainen P.; Palta M.M.; Vrede T.; Weyhenmeyer G.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:8
起始页码: 3692
结束页码: 3714
语种: 英语
英文关键词: atmospheric change ; cyanobacteria ; dissolved organic matter ; food webs ; lake ; mercury ; northern
Scopus关键词: cyanobacterium ; dissolved organic matter ; ecosystem response ; food web ; global change ; lake ecosystem ; mercury (element) ; terrestrial ecosystem ; Cyanobacteria
英文摘要: Northern ecosystems are experiencing some of the most dramatic impacts of global change on Earth. Rising temperatures, hydrological intensification, changes in atmospheric acid deposition and associated acidification recovery, and changes in vegetative cover are resulting in fundamental changes in terrestrial–aquatic biogeochemical linkages. The effects of global change are readily observed in alterations in the supply of dissolved organic matter (DOM)—the messenger between terrestrial and lake ecosystems—with potentially profound effects on the structure and function of lakes. Northern terrestrial ecosystems contain substantial stores of organic matter and filter or funnel DOM, affecting the timing and magnitude of DOM delivery to surface waters. This terrestrial DOM is processed in streams, rivers, and lakes, ultimately shifting its composition, stoichiometry, and bioavailability. Here, we explore the potential consequences of these global change-driven effects for lake food webs at northern latitudes. Notably, we provide evidence that increased allochthonous DOM supply to lakes is overwhelming increased autochthonous DOM supply that potentially results from earlier ice-out and a longer growing season. Furthermore, we assess the potential implications of this shift for the nutritional quality of autotrophs in terms of their stoichiometry, fatty acid composition, toxin production, and methylmercury concentration, and therefore, contaminant transfer through the food web. We conclude that global change in northern regions leads not only to reduced primary productivity but also to nutritionally poorer lake food webs, with discernible consequences for the trophic web to fish and humans. © 2018 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110322
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada; Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden; Interfaculty Program on Public Health & Department of Biology, Western University, London, ON, Canada; School of Life Sciences, Arizona State University, Tempe, AZ, United States; Section for Aquatic Biology and Toxicology, University of Oslo, Oslo, Norway; Climate Impacts Research Centre, Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden; Department of Biology and Canadian Rivers Institute, University of New Brunswick, Saint John, NB, Canada; Department of Biology, Lund University, Lund, Sweden; INSTAAR, University of Colorado, Boulder, CO, United States; Department of Geography, Western University, London, ON, Canada; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden; Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States; Finnish Environment Institute, Helsinki, Finland; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden; Department of Ecology and Genetics, Limnology, Uppsala University, Uppsala, Sweden

Recommended Citation:
Creed I.F.,Bergström A.-K.,Trick C.G.,et al. Global change-driven effects on dissolved organic matter composition: Implications for food webs of northern lakes[J]. Global Change Biology,2018-01-01,24(8)
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