Nitrogen availability regulates topsoil carbon dynamics after permafrost thaw by altering microbial metabolic efficiency

doi:10.1038/s41467-018-06232-y

	Nitrogen availability regulates topsoil carbon dynamics after permafrost thaw by altering microbial metabolic efficiency
	Chen, Leiyi ; Liu, Li 1; Mao, Chao 1; Qin, Shuqi 1; Wang, Jun 1; Liu, Futing 1; Blagodatsky, Sergey 2,3; Yang, Guibiao 1; Zhang, Qiwen 1; Zhang, Dianye 1; Yu, Jianchun 1; Yang, Yuanhe1
	2018
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	9
摘要	Input of labile carbon may accelerate the decomposition of existing soil organic matter (priming effect), with the priming intensity depending on changes in soil nitrogen availability after permafrost thaw. However, experimental evidence for the linkage between the priming effect and post-thaw nitrogen availability is unavailable. Here we test the hypothesis that elevated nitrogen availability after permafrost collapse inhibits the priming effect by increasing microbial metabolic efficiency based on a combination of thermokarst-induced natural nitrogen gradient and nitrogen addition experiment. We find a negative correlation between the priming intensity and soil total dissolved nitrogen concentration along the thaw sequence. The negative effect is confirmed by the reduced priming effect after nitrogen addition. In contrast to the prevailing view, this nitrogen-regulated priming intensity is independent of extracellular enzyme activities but associated with microbial metabolic efficiency. These findings demonstrate that post-thaw nitrogen availability regulates topsoil carbon dynamics through its modification of microbial metabolic efficiency.
学科领域	Multidisciplinary Sciences
DOI	10.1038/s41467-018-06232-y
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; FUMIGATION-EXTRACTION METHOD ; TUSSOCK TUNDRA SOIL ; TIBETAN PLATEAU ; BIOMASS CALIBRATION ; COMMUNITY STRUCTURE ; CLIMATE-CHANGE ; ARCTIC TUNDRA ; FOREST SOILS ; STOICHIOMETRY
WOS记录号	WOS:000445819400002
出版者	NATURE PUBLISHING GROUP
文献子类	Article
出版地	LONDON
资助机构	National Key R&D Program of China [2017YFC0503903] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31770557, 31670482] ; Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SMC049] ; Youth Innovation Promotion Association of Chinese Academy of Science ; Chinese Academy of Sciences-Peking University Pioneer Cooperation Team
作者邮箱	yhyang@ibcas.ac.cn
作品OA属性	Green Published, gold
引用统计	被引频次：122[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20362
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Hohenheim, Inst Agr Sci Trop, Hans Ruthenberg Inst, D-70599 Stuttgart, Germany 4.Russian Acad Sci, Inst Physicochem & Biol Problems Soil Sci, Pushchino 142290, Russia
推荐引用方式 GB/T 7714	Chen, Leiyi,Liu, Li,Mao, Chao,et al. Nitrogen availability regulates topsoil carbon dynamics after permafrost thaw by altering microbial metabolic efficiency[J]. NATURE COMMUNICATIONS,2018,9.
APA	Chen, Leiyi.,Liu, Li.,Mao, Chao.,Qin, Shuqi.,Wang, Jun.,...&Yang, Yuanhe.(2018).Nitrogen availability regulates topsoil carbon dynamics after permafrost thaw by altering microbial metabolic efficiency.NATURE COMMUNICATIONS,9.
MLA	Chen, Leiyi,et al."Nitrogen availability regulates topsoil carbon dynamics after permafrost thaw by altering microbial metabolic efficiency".NATURE COMMUNICATIONS 9(2018).

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