Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow

doi:10.1111/1365-2435.13300

IGSNRR OpenIR

	Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow
	Zhang, Fangyue 1,2; Quan, Quan 1,2; Ma, Fangfang 1,2; Tian, Dashuan 1; Zhou, Qingping 3; Niu, Shuli 1,2
	2019-05-01
Source Publication	FUNCTIONAL ECOLOGY
ISSN	0269-8463
Volume	33 Issue:5 Pages:889-900
Corresponding Author	Niu, Shuli(sniu@igsnrr.ac.cn)
Abstract	Changes in precipitation have the potential to cause dramatic changes in ecosystem carbon (C) cycling; however, it remains unclear whether different components of the net ecosystem exchange (NEE) (e.g., C uptake vs. release, plant vs. microbe respiration, above-ground vs. below-ground plant respiration) have similar or differential sensitivity to precipitation gradients. We conducted a manipulative field experiment (from 2015 to 2017) with six precipitation treatments, including 1/12 annual precipitation (P), 1/4 P, 1/2 P, 3/4 P, P and 5/4 P in an alpine meadow to investigate the responses of the NEE components. Over the 3years, all C fluxes showed a nonlinear response to the precipitation gradients, except for root respiration. The most extreme drought treatment (1/12 P) caused strong reductions in NEE by 15.57%, gross primary productivity by 17.26% and ecosystem respiration by 19.05%, in contrast to the control. Plant respiration was more sensitive to precipitation change than microbe respiration, and above-ground plant respiration was more susceptible than below-ground respiration. Structural equation models revealed that the response of C fluxes under precipitation changes was primarily due to changes in the soil water content and above-ground net primary productivity. Our findings indicate that future precipitation changes, particularly extreme drought, will decrease ecosystem C fluxes with different magnitudes, leading to a consequent reduction of NEE. These emergent ecosystem properties are essential for the improved elucidation of carbon cycle dynamics and benchmarking models, to predict ecosystem responses to precipitation changes. A plain language summary is available for this article.
Keyword	alpine meadow carbon fluxes climate extremes manipulative experiment nonlinear response precipitation gradient
DOI	10.1111/1365-2435.13300
WOS Keyword	NET PRIMARY PRODUCTIVITY ; PLANT-SPECIES DIVERSITY ; SOIL-MOISTURE ; CLIMATE-CHANGE ; HETEROTROPHIC RESPIRATION ; INTERANNUAL VARIABILITY ; EXPERIMENTAL DROUGHT ; WATER AVAILABILITY ; DIOXIDE EXCHANGE ; EXTREME DROUGHT
Indexed By	SCI
Language	英语
Funding Project	Ministry of Science and Technology of the People's Republic of China[2016YFC0501803] ; National Natural Science Foundation of China[31470528] ; National Natural Science Foundation of China[31625006]
Funding Organization	Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China
WOS Research Area	Environmental Sciences & Ecology
WOS Subject	Ecology
WOS ID	WOS:000471332200013
Publisher	WILEY
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.igsnrr.ac.cn/handle/311030/58676
Collection	中国科学院地理科学与资源研究所
Corresponding Author	Niu, Shuli
Affiliation	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu, Sichuan, Peoples R China
Recommended Citation GB/T 7714	Zhang, Fangyue,Quan, Quan,Ma, Fangfang,et al. Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow[J]. FUNCTIONAL ECOLOGY,2019,33(5):889-900.
APA	Zhang, Fangyue,Quan, Quan,Ma, Fangfang,Tian, Dashuan,Zhou, Qingping,&Niu, Shuli.(2019).Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow.FUNCTIONAL ECOLOGY,33(5),889-900.
MLA	Zhang, Fangyue,et al."Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow".FUNCTIONAL ECOLOGY 33.5(2019):889-900.

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