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DOI	10.1038/s41559-021-01551-8
	Exacerbated drought impacts on global ecosystems due to structural overshoot
	Zhang Y.; Keenan T.F.; Zhou S.
发表日期	2021
ISSN	2397-334X
起始页码	1490
结束页码	1498
卷号	5 期号:11
英文摘要	Vegetation dynamics are affected not only by the concurrent climate but also by memory-induced lagged responses. For example, favourable climate in the past could stimulate vegetation growth to surpass the ecosystem carrying capacity, leaving an ecosystem vulnerable to climate stresses. This phenomenon, known as structural overshoot, could potentially contribute to worldwide drought stress and forest mortality but the magnitude of the impact is poorly known due to the dynamic nature of overshoot and complex influencing timescales. Here, we use a dynamic statistical learning approach to identify and characterize ecosystem structural overshoot globally and quantify the associated drought impacts. We find that structural overshoot contributed to around 11% of drought events during 1981–2015 and is often associated with compound extreme drought and heat, causing faster vegetation declines and greater drought impacts compared to non-overshoot related droughts. The fraction of droughts related to overshoot is strongly related to mean annual temperature, with biodiversity, aridity and land cover as secondary factors. These results highlight the large role vegetation dynamics play in drought development and suggest that soil water depletion due to warming-induced future increases in vegetation could cause more frequent and stronger overshoot droughts. ? 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	biodiversity; climate change; drought; ecosystem; forest; Biodiversity; Climate Change; Droughts; Ecosystem; Forests
来源期刊	Nature Ecology & Evolution
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256826
作者单位	Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Environmental Science, Policy and Management, UC Berkeley, Berkeley, CA, United States; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China; Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States; State Key Laboratory of Earth Surface Processes and Resources Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China
推荐引用方式 GB/T 7714	Zhang Y.,Keenan T.F.,Zhou S.. Exacerbated drought impacts on global ecosystems due to structural overshoot[J],2021,5(11).
APA	Zhang Y.,Keenan T.F.,&Zhou S..(2021).Exacerbated drought impacts on global ecosystems due to structural overshoot.Nature Ecology & Evolution,5(11).
MLA	Zhang Y.,et al."Exacerbated drought impacts on global ecosystems due to structural overshoot".Nature Ecology & Evolution 5.11(2021).