Shifts in ecosystem water use efficiency on china's loess plateau caused by the interaction of climatic and biotic factors over 1985-2015

doi:10.1016/j.agrformet.2020.108100

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Shifts in ecosystem water use efficiency on china's loess plateau caused by the interaction of climatic and biotic factors over 1985-2015
	Cao, Ruochen 1; Hu, Zhongmin 1,2; Jiang, Zhiyun 1,3; Yang, Yuting 4; Zhao, Wei 5; Wu, Genan 5,6; Feng, Xiaoming 6,7; Chen, Ruru 5,6; Hao, Guangcun 1
通讯作者	Hu, Zhongmin(huzm@m.scnu.edu.cn)
	2020-09-15
发表期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
卷号	291 页码:9
摘要	Ecosystem water use efficiency (WUE), defined as the ratio of gross primary productivity (GPP) to total ecosystem evapotranspiration (ET), is an important indicator of the coupling between the terrestrial carbon and water cycles. China's Loess Plateau (CLP) has been experiencing climatic warming in recent decades and large-scale revegetation since the early 2000s. Understanding the combined effects of revegetation and climate change on ecosystem WUE patterns is important for a better prediction of future changes of the water and carbon cycles in the region. In this study, we decompose ecosystem WUE into a two-component process, i.e., the ratio of carbon uptake to plant transpiration, GPP/T, and the ratio of plant transpiration to total evapotranspiration, T/ET. Based on this, we investigate the temporal variations of ecosystem WUE and examine the underlying controls of WUE dynamics on CLP during 1985-2015. We find that ecosystem WUE on CLP remains more or less unchanged during 1985-1999 as a result of an increased T/ET that is largely offset by a decreased GPP/T induced by increases in atmospheric vapor pressure deficit. In comparison, ecosystem WUE significantly increases during 2000-2015, owing to the increased leaf area index, which promotes the fraction of plant transpiration over total ET (i.e., T/ET). In facing the upcoming peak of greenness and continuing climate warming, our results suggest that CLP's ecosystem WUE may experience a downward trend in the future due to diminishing positive effects of leaf area index but increasing negative effects of atmospheric vapor pressure deficit. Our study highlights the importance of decomposing ecosystem WUE into component processes to better understand the mechanisms that underlying the changes of ecosystem WUE and to predict future ecosystem WUE dynamics.
关键词	Loess plateau Water use efficiency Revegetation Climate change Temporal dynamics
DOI	10.1016/j.agrformet.2020.108100
关键词[WOS]	VAPOR-PRESSURE DEFICIT ; ECOLOGICAL RESTORATION ; ENVIRONMENTAL CONTROLS ; VEGETATION CONTROL ; CARBON-DIOXIDE ; EVAPOTRANSPIRATION ; TRANSPIRATION ; FOREST ; AFFORESTATION ; RESPONSES
收录类别	SCI ; SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFA0604801] ; National Key R&D Program of China[2016YFC0501603] ; National Natural Science Foundation of China[31922053] ; National Natural Science Foundation of China[31570437] ; Innovation Project of Graduate School of South China Normal University[2019LKXM044] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment[SKLLQG1910]
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
项目资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; Innovation Project of Graduate School of South China Normal University ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000556177600056
出版者	ELSEVIER
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15135
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Hu, Zhongmin
作者单位	1.South China Normal Univ, Sch Geog, Shipai Campus, Guangzhou 510631, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 4.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 5.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 6.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 7.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Cao, Ruochen,Hu, Zhongmin,Jiang, Zhiyun,et al. Shifts in ecosystem water use efficiency on china's loess plateau caused by the interaction of climatic and biotic factors over 1985-2015[J]. AGRICULTURAL AND FOREST METEOROLOGY,2020,291:9.
APA	Cao, Ruochen.,Hu, Zhongmin.,Jiang, Zhiyun.,Yang, Yuting.,Zhao, Wei.,...&Hao, Guangcun.(2020).Shifts in ecosystem water use efficiency on china's loess plateau caused by the interaction of climatic and biotic factors over 1985-2015.AGRICULTURAL AND FOREST METEOROLOGY,291,9.
MLA	Cao, Ruochen,et al."Shifts in ecosystem water use efficiency on china's loess plateau caused by the interaction of climatic and biotic factors over 1985-2015".AGRICULTURAL AND FOREST METEOROLOGY 291(2020):9.