globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85061384332
论文题名:
Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape
作者: Bogard M.J.; Kuhn C.D.; Johnston S.E.; Striegl R.G.; Holtgrieve G.W.; Dornblaser M.M.; Spencer R.G.M.; Wickland K.P.; Butman D.E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2019
语种: 英语
英文摘要: High-latitude environments store nearly half of the planet’s below-ground organic carbon (OC), mostly in perennially frozen permafrost soils. Climatic changes drive increased export of terrestrial OC into many aquatic networks, yet the role that circumpolar lakes play in mineralizing this carbon is unclear. Here we directly evaluate ecosystem-scale OC cycling for lakes of interior Alaska. This arid, low-relief lake landscape is representative of over a quarter of total northern circumpolar lake area, but is greatly under-represented in current studies. Contrary to projections based on work in other regions, the studied lakes had a negligible role in mineralizing terrestrial carbon; they received little OC from ancient permafrost soils, and had small net contribution to the watershed carbon balance. Instead, most lakes recycled large quantities of internally derived carbon fixed from atmospheric CO 2 , underscoring their importance as critical sites for material and energy provision to regional food webs. Our findings deviate from the prevailing paradigm that northern lakes are hotspots of terrestrial OC processing. The shallow and hydrologically disconnected nature of lakes in many arid circumpolar landscapes isolates them from terrestrial carbon processing under current climatic conditions. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122626
Appears in Collections:气候变化事实与影响

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作者单位: School of Environmental and Forest Sciences, University of Washington, Seattle, WA, United States; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States; United States Geological Survey, Boulder, CO, United States; School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA, United States; School of Engineering and Environmental Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Bogard M.J.,Kuhn C.D.,Johnston S.E.,et al. Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape[J]. Nature Geoscience,2019-01-01
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