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DOI	10.1088/1748-9326/abb332
	The collapse points of increasing trend of vegetation rain-use efficiency under droughts
	Chen Z.; Wang W.; Yu Z.; Xia J.; Schwartz F.W.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	The vegetation rain-use efficiency (RUE) represents the ability of an ecosystem to use rainfall and is an important descriptor of ecological functions of terrestrial system. Although studies have been conducted to investigate the impact of droughts on vegetation, we still lack critical understanding of how exactly RUE responds to droughts of different time scales and intensities. Here, we present evidence for a rapid response in RUE, and collapse points of RUE increase trend during droughts by using multi-source meteorological data and satellite-derived vegetation indices. The highest correlation was found consistently between RUE and computed drought index at time scale of 1 month for all biome types and climate regimes. We further discovered that RUE increased significantly with amplification of drought intensity to a maximum RUE, especially for semi-arid and arid biomes. As drought is prolonged, RUE increased till a tipping point was reached across all biomes and climatic conditions, indicating that the long-term droughts weaken the sensitivities of RUE to drought and threaten the resilience of ecosystem. This study comprehensively provides a satellite-based evaluation of RUE response to different drought features. We envisage that the findings would contribute to the development of drought early warning from an ecological perspective and to provide the sustainable environmental management. © 2020 The Author(s).
英文关键词	Drought; Global biome; Rain-use efficiency; SPEI; Tipping point
语种	英语
scopus关键词	Ecosystems; Efficiency; Environmental management; Rain; Sustainable development; Vegetation; Climatic conditions; Different time scale; Drought intensities; Ecological functions; Meteorological data; Sustainable environmental management; Terrestrial systems; Vegetation index; Drought; biome; drought; early warning system; ecosystem resilience; rainfall; satellite data; sustainable development; trend analysis; vegetation index
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/153616
作者单位	State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China; College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China; School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan, 430072, China; School of Earth Sciences, Ohio State University, Columbus, OH 43210, United States
推荐引用方式 GB/T 7714	Chen Z.,Wang W.,Yu Z.,et al. The collapse points of increasing trend of vegetation rain-use efficiency under droughts[J],2020,15(10).
APA	Chen Z.,Wang W.,Yu Z.,Xia J.,&Schwartz F.W..(2020).The collapse points of increasing trend of vegetation rain-use efficiency under droughts.Environmental Research Letters,15(10).
MLA	Chen Z.,et al."The collapse points of increasing trend of vegetation rain-use efficiency under droughts".Environmental Research Letters 15.10(2020).