Water use efficiency of China's terrestrial ecosystems and responses to drought

Scientific Reports
Yibo LiuXiaocui Wu

Abstract

Water use efficiency (WUE) measures the trade-off between carbon gain and water loss of terrestrial ecosystems, and better understanding its dynamics and controlling factors is essential for predicting ecosystem responses to climate change. We assessed the magnitude, spatial patterns, and trends of WUE of China's terrestrial ecosystems and its responses to drought using a process-based ecosystem model. During the period from 2000 to 2011, the national average annual WUE (net primary productivity (NPP)/evapotranspiration (ET)) of China was 0.79 g C kg(-1) H2O. Annual WUE decreased in the southern regions because of the decrease in NPP and the increase in ET and increased in most northern regions mainly because of the increase in NPP. Droughts usually increased annual WUE in Northeast China and central Inner Mongolia but decreased annual WUE in central China. "Turning-points" were observed for southern China where moderate and extreme droughts reduced annual WUE and severe drought slightly increased annual WUE. The cumulative lagged effect of drought on monthly WUE varied by region. Our findings have implications for ecosystem management and climate policy making. WUE is expected to continue to change under future climate change ...Continue Reading

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Citations

Feb 22, 2017·Scientific Reports·Xiaodong LiuJiyue Li
Jan 9, 2020·Nature Communications·Xiaowei TongRasmus Fensholt
Mar 14, 2019·Frontiers in Plant Science·Chengcheng GangZhongming Wen
Aug 15, 2019·Environmental Monitoring and Assessment·Xingming HaoYing Zhang
Apr 2, 2019·Global Change Biology·Aliénor LavergneIain Colin Prentice
Nov 14, 2020·The Science of the Total Environment·Min WangXuguang Tang
Jul 31, 2021·Environmental Science and Pollution Research International·Zhenyu ZhangYanlian Zhou
Aug 9, 2021·Environmental Science and Pollution Research International·Anzhou ZhaoAnbing Zhang
Oct 9, 2021·Environmental Science and Pollution Research International·Anzhou ZhaoAnbing Zhang

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Software Mentioned

BEPS
Boreal Ecosystem Productivity Simulator ( BEPS )
SPI

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