globalchange  > 气候减缓与适应
DOI: 10.1038/NGEO3051
论文题名:
Variability in organic carbon reactivity across lake residence time and trophic gradients
作者: Evans C.D.; Futter M.N.; Moldan F.; Valinia S.; Frogbrook Z.; Kothawala D.N.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期:11
起始页码: 832
结束页码: 835
语种: 英语
Scopus关键词: carbon budget ; carbon cycle ; environmental gradient ; eutrophication ; lacustrine environment ; land-sea interaction ; organic carbon ; residence time ; trophic environment ; Europe ; North America
英文摘要: The transport of dissolved organic carbon from land to ocean is a large dynamic component of the global carbon cycle. Inland waters are hotspots for organic matter turnover, via both biological and photochemical processes, and mediate carbon transfer between land, oceans and atmosphere. However, predicting dissolved organic carbon reactivity remains problematic. Here we present in situ dissolved organic carbon budget data from 82 predominantly European and North American water bodies with varying nutrient concentrations and water residence times ranging from one week to 700 years. We find that trophic status strongly regulates whether water bodies act as net dissolved organic carbon sources or sinks, and that rates of both dissolved organic carbon production and consumption can be predicted from water residence time. Our results suggest a dominant role of rapid light-driven removal in water bodies with a short water residence time, whereas in water bodies with longer residence times, slower biotic production and consumption processes are dominant and counterbalance one another. Eutrophication caused lakes to transition from sinks to sources of dissolved organic carbon. We conclude that rates and locations of dissolved organic carbon processing and associated CO2 emissions in inland waters may be misrepresented in global carbon budgets if temporal and spatial reactivity gradients are not accounted for. © 2017 Macmillan Publishers Limited, part of Springer Nature. 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/105674
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Centre for Ecology and Hydrology, Deiniol Road, Bangor, United Kingdom; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjälms Väg 9, Uppsala, Sweden; IVL Swedish Environmental Research Institute, PO Box 5302, Göteborg, Sweden; Norwegian Institute for Water Research, Gaustadalléen 21, Oslo, Norway; Scottish Water, 55 Buckstone Terrace, Edinburgh, United Kingdom; Department of Ecology and Genetics/Limnology, Uppsala University, Norbyvägen 18D, Uppsala, Sweden; Swedish Environmental Protection Agency, Valhallavägen 195, Stockholm, Sweden

Recommended Citation:
Evans C.D.,Futter M.N.,Moldan F.,et al. Variability in organic carbon reactivity across lake residence time and trophic gradients[J]. Nature Geoscience,2017-01-01,10(11)
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