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, Ruochen1; Hu, Zhongmin1,2; Jiang, Zhiyun1,3; Yang, Yuting4; Zhao, Wei5; Wu, Genan5,6; Feng, Xiaoming6,7; Chen, Ruru5,6; Hao, Guangcun1
Corresponding AuthorHu, Zhongmin(huzm@m.scnu.edu.cn)
2020-09-15
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
Volume291Pages:9
AbstractEcosystem 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.
KeywordLoess plateau Water use efficiency Revegetation Climate change Temporal dynamics
DOI10.1016/j.agrformet.2020.108100
WOS KeywordVAPOR-PRESSURE DEFICIT ; ECOLOGICAL RESTORATION ; ENVIRONMENTAL CONTROLS ; VEGETATION CONTROL ; CARBON-DIOXIDE ; EVAPOTRANSPIRATION ; TRANSPIRATION ; FOREST ; AFFORESTATION ; RESPONSES
Indexed BySCI ; SCI
Language英语
Funding ProjectNational 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 Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
Funding OrganizationNational 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 SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:000556177600056
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15135
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorHu, Zhongmin
Affiliation1.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
Recommended Citation
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.
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