Dual controls on carbon loss during drought in peatlands

doi:10.1038/nclimate2643

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	Dual controls on carbon loss during drought in peatlands
	Wang, Hongjun 1; Richardson, Curtis J.; Ho, Mengchi
刊名	NATURE CLIMATE CHANGE
	2015
卷号	5 期号:6 页码:584+
ISSN号	1758-678X
DOI	10.1038/nclimate2643
文献子类	Article
英文摘要	Peatlands store one-third of global soil carbon(1). Drought/drainage coupled with climate warming present the main threat to these stores(1-4). Hence, understanding drought effects and inherent feedbacks related to peat decomposition has been a primary global challenge(5,6). However, widely divergent results concerning drought in recent studies(3,7-11) challenge the accepted paradigm that waterlogging and associated anoxia are the overarching controls locking up carbon stored in peat. Here, by linking field and microcosm experiments, we show how previously unrecognized mechanisms regulate the build-up of phenolics, which protects stored carbon directly by reducing phenol oxidase activity during short-term drought and, indirectly, through a shift from low-phenolic Sphagnum/herbs to high-phenolic shrubs after long-term moderate drought. We demonstrate that shrub expansion induced by drought/warming(2,6,10,12,13) in boreal peatlands might be a long-term self-adaptive mechanism not only increasing carbon sequestration but also potentially protecting historic soil carbon. We therefore propose that the projected 'positive feedback loop' between carbon emission and drought in peatlands(2,3,14,15) may not occur in the long term.
学科主题	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
电子版国际标准刊号	1758-6798
出版地	BERLIN
WOS关键词	PHENOL OXIDASE ACTIVITY ; MICROBIAL COMMUNITY ; ORGANIC-MATTER ; WATER-LEVEL ; SOIL ; DECOMPOSITION ; RESPIRATION ; FEEDBACK ; FLUXES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED) ; Social Science Citation Index (SSCI)
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000356814800037
资助机构	Coastal Carolina/Southeastern Virginia Strategic Habitat Conservation Team ; US Fish and Wildlife Service-Region 4 ; Nature Conservancy of North Carolina ; US DOE Office of Science, Terrestrial Ecosystem Sciences [DE-SC0012272] ; Duke University Wetland Center Endowment
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25848]
专题	植被与环境变化国家重点实验室
作者单位	1.Duke Univ, Wetland Ctr, Nicholas Sch Environm, Box 90333, Durham, NC 27708 USA 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hongjun,Richardson, Curtis J.,Ho, Mengchi. Dual controls on carbon loss during drought in peatlands[J]. NATURE CLIMATE CHANGE,2015,5(6):584+.
APA	Wang, Hongjun,Richardson, Curtis J.,&Ho, Mengchi.(2015).Dual controls on carbon loss during drought in peatlands.NATURE CLIMATE CHANGE,5(6),584+.
MLA	Wang, Hongjun,et al."Dual controls on carbon loss during drought in peatlands".NATURE CLIMATE CHANGE 5.6(2015):584+.