Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau

doi:10.1016/j.agrformet.2020.108190

	Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau
	Li, Peilin 1; Zhu, Dan 2,3; Wang, Yilong 4; Liu, Dan 1
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2020-12-15
卷号	295 页码:12
关键词	Vegetation greenness Extreme drought Legacy effect Tibetan Plateau Alpine meadow Alpine steppe
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2020.108190
通讯作者	Zhu, Dan(zhudan.celia@gmail.com)
英文摘要	Extreme drought events exert both immediate and prolonged influences on terrestrial ecosystems, yet the patterns and mechanisms of the delayed effects of extreme drought on alpine ecosystems remain largely unknown. In this study, we use satellite-derived normalized difference vegetation index (NDVI) data to examine the legacy effect of severe drought events on vegetation greenness across the Tibetan Plateau (TP). A pervasive, negative drought legacy effect, lasting about one year, is detected for all plant functional types including forests, shrubs and grasslands on the TP. The magnitude of the identified legacy effect, namely, the reduced growing-season NDVI in the first year post-drought, is spatially heterogeneous and exhibits a clear altitude dependence, while divergent relationships between elevation and the legacy effect are observed between alpine meadow and steppe. For alpine meadow, more pronounced legacy effects occur at higher altitudes with lower precipitation and temperature, suggesting a weaker drought resilience of alpine meadow under dryer and colder conditions. Whereas for alpine steppe, the magnitude of the negative legacies reduces as precipitation decreases along the elevation, which might be due to a greater adaptability to drought under more arid conditions that enables plant communities to recover to their normal state faster in these very dry regions. Our results advance the understanding of drought legacy effects on TP alpine ecosystems and highlight future avenues for research into how different alpine ecosystem types will respond to drought stress.
资助项目	National Natural Science Foundation of China[41861134036] ; National Natural Science Foundation of China[41988101] ; Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0405]
WOS关键词	WATER-USE EFFICIENCY ; CLIMATE EXTREMES ; ALPINE GRASSLANDS ; ECOLOGICAL MEMORY ; CARBON-CYCLE ; PRODUCTIVITY ; ECOSYSTEM ; IMPACTS ; GROWTH ; RESILIENCE
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000582305500022
资助机构	National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156751]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhu, Dan
作者单位	1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100101, Peoples R China 2.Univ Autonoma Barcelona, Inst Ciencia & Tecnol Ambientals ICTA, Barcelona, Spain 3.Univ Paris Saclay, CEA CNRS UVSQ, LSCE IPSL, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Peilin,Zhu, Dan,Wang, Yilong,et al. Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2020,295:12.
APA	Li, Peilin,Zhu, Dan,Wang, Yilong,&Liu, Dan.(2020).Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,295,12.
MLA	Li, Peilin,et al."Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 295(2020):12.