Experimental warming shifts coupling of carbon and nitrogen cycles in an alpine meadow

doi:10.1093/jpe/rtab008

	Experimental warming shifts coupling of carbon and nitrogen cycles in an alpine meadow
	Wang, Song 1,3; Quan, Quan 1,3; Meng, Cheng 1; Chen, Weinan 1,3; Luo, Yiqi 2; Niu, Shuli 1,3
刊名	JOURNAL OF PLANT ECOLOGY
	2021-06-01
卷号	14 期号:3 页码:541-554
关键词	Bayesian probabilistic inversion Markov-Chain Monte-Carlo (MCMC) warming carbon and nitrogen cycles stoichiometry alpine meadow
ISSN号	1752-9921
DOI	10.1093/jpe/rtab008
通讯作者	Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	Aims Terrestrial ecosystem carbon (C) uptake is remarkably regulated by nitrogen (N) availability in the soil. However, the coupling of C and N cycles, as reflected by C:N ratios in different components, has not been well explored in response to climate change. Methods Here, we applied a data assimilation approach to assimilate 14 datasets collected from a warming experiment in an alpine meadow in China into a grassland ecosystem model. We attempted to evaluate how experimental warming affects C and N coupling as indicated by constrained parameters under ambient and warming treatments separately. Important Findings The results showed that warming increased soil N availability with decreased C:N ratio in soil labile C pool, leading to an increase in N uptake by plants. Nonetheless, C input to leaf increased more than N, leading to an increase and a decrease in the C:N ratio in leaf and root, respectively. Litter C:N ratio was decreased due to the increased N immobilization under high soil N availability or warming-accelerated decomposition of litter mass. Warming also increased C:N ratio of slow soil organic matter pool, suggesting a greater soil C sequestration potential. As most models usually use a fixed C:N ratio across different environments, the divergent shifts of C:N ratios under climate warming detected in this study could provide a useful benchmark for model parameterization and benefit models to predict C-N coupled responses to future climate change.
资助项目	National Natural Science Foundation of China[31625006] ; National Natural Science Foundation of China[31988102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23080302] ; International Collaboration Project of Chinese Academy of Sciences[131A11KYSB20180010]
WOS关键词	QINGHAI-TIBET PLATEAU ; PARAMETER-ESTIMATION ; MICROBIAL BIOMASS ; DATA ASSIMILATION ; USE EFFICIENCY ; CLIMATE ; RESPONSES ; ECOSYSTEM ; FOREST ; FEEDBACKS
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000648966700015
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Collaboration Project of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163949]
专题	中国科学院地理科学与资源研究所
通讯作者	Niu, Shuli
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Song,Quan, Quan,Meng, Cheng,et al. Experimental warming shifts coupling of carbon and nitrogen cycles in an alpine meadow[J]. JOURNAL OF PLANT ECOLOGY,2021,14(3):541-554.
APA	Wang, Song,Quan, Quan,Meng, Cheng,Chen, Weinan,Luo, Yiqi,&Niu, Shuli.(2021).Experimental warming shifts coupling of carbon and nitrogen cycles in an alpine meadow.JOURNAL OF PLANT ECOLOGY,14(3),541-554.
MLA	Wang, Song,et al."Experimental warming shifts coupling of carbon and nitrogen cycles in an alpine meadow".JOURNAL OF PLANT ECOLOGY 14.3(2021):541-554.