气候变化领域集成服务门户(CCPortal): Interactive and individual effects of multi-factor controls on water use efficiency in Central Asian ecosystems

CCPortal

DOI	10.1088/1748-9326/ab8e8b
	Interactive and individual effects of multi-factor controls on water use efficiency in Central Asian ecosystems
	Zhu S.; Zhang C.; Fang X.; Cao L.
发表日期	2020
ISSN	17489318
卷号	15 期号:8
英文摘要	Water use efficiency (WUE) characterizes the relationship between water dissipation and carbon sequestration. Knowledge of WUE dynamics and its responses to complex climate controls are prerequisites for addressing the challenges of future climate change and human disturbance of wild lands. Owing to a lack of experimental observations and the complexity of quantifying the individual and interactive effects of different environmental factors, the mechanism of WUE dynamics and the spatiotemporal characteristics of WUE in Central Asian ecosystems remain unclear. Here, a specific Arid Ecosystem Model was used to assess WUE dynamics under environmental stresses, specifically isolating and identifying proprietary features from complex coupling effects, across different ecosystems in Central Asia from 1980 to 2014. WUE declined in southern Xinjiang but exhibited an upward trend in the Tianshan Mountains and northern Kazakhstan. Precipitation and CO2 controlled WUE of 39% and 54% of Central Asia, respectively. The factor analysis showed that the negative effects of climate change were largely compensated by the CO2 fertilization effect, and their interaction produced negative feedback to WUE. This resulted in inhibition of the CO2 fertilization effect during long droughts. The negative effects of warming included increased water stress and enhanced evapotranspiration from vegetation. Based on variations in precipitation and net primary production, we determined that southern Xinjiang and the Turgay Plateau were environmentally vulnerable areas. Our study provides guidance regarding how ecologically fragile regions in Central Asia might cope with environmental pressures under extreme climate change in the future. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	AEM; Central Asia; climate change; water use efficiency
语种	英语
scopus关键词	Carbon dioxide; Dynamics; Ecosystems; Efficiency; Feedback; Water supply; Complex coupling effects; Ecologically fragile regions; Environmental factors; Environmental pressures; Environmental stress; Net primary production; Spatiotemporal characteristics; Water-use efficiency; Climate change; arid environment; carbon dioxide; carbon sequestration; climate change; control system; dissipation; nature-society relations; water footprint; water use efficiency; Central Asia; China; Kazakhstan; Turgay Basin; Xinjiang Uygur
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153856
作者单位	Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi, 276000, China; International Institute for Earth System Science, Nanjing University, Nanjing, 210093, China; Jiangsu Ctr. for Collab. Innovation in Geographical Information Resource Development and Application, Nanjing, China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Xinjiang Institute of Engineering, Urumqi, Xinjiang830091, China; Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi, 830011, China
推荐引用方式 GB/T 7714	Zhu S.,Zhang C.,Fang X.,et al. Interactive and individual effects of multi-factor controls on water use efficiency in Central Asian ecosystems[J],2020,15(8).
APA	Zhu S.,Zhang C.,Fang X.,&Cao L..(2020).Interactive and individual effects of multi-factor controls on water use efficiency in Central Asian ecosystems.Environmental Research Letters,15(8).
MLA	Zhu S.,et al."Interactive and individual effects of multi-factor controls on water use efficiency in Central Asian ecosystems".Environmental Research Letters 15.8(2020).