气候变化领域集成服务门户(CCPortal): Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape

CCPortal

DOI	10.1038/s41561-019-0299-5
	Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape
	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.
发表日期	2019
ISSN	17520894
EISSN	1752-0908
卷号	12 期号:3 页码:180-+
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 CO2, 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.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS记录号	WOS:000460103000011
scopus关键词	air-soil interaction; arid region; carbon cycle; climate conditions; organic carbon; permafrost; terrestrial environment; watershed; Alaska; United States
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/81940
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
推荐引用方式 GB/T 7714	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],2019,12(3):180-+.
APA	Bogard M.J..,Kuhn C.D..,Johnston S.E..,Striegl R.G..,Holtgrieve G.W..,...&Butman D.E..(2019).Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape.Nature Geoscience,12(3),180-+.
MLA	Bogard M.J.,et al."Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape".Nature Geoscience 12.3(2019):180-+.