气候变化领域集成服务门户(CCPortal): Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau

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DOI	10.1016/j.agrformet.2020.108190
	Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau
	Li, Peilin; Zhu, Dan; Wang, Yilong; Liu, Dan
通讯作者	Zhu, D (通讯作者)
发表日期	2020
ISSN	0168-1923
EISSN	1873-2240
卷号	295
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.
关键词	WATER-USE EFFICIENCY CLIMATE EXTREMES ALPINE GRASSLANDS ECOLOGICAL MEMORY CARBON-CYCLE PRODUCTIVITY ECOSYSTEM IMPACTS GROWTH RESILIENCE
英文关键词	Vegetation greenness; Extreme drought; Legacy effect; Tibetan Plateau; Alpine meadow; Alpine steppe
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000582305500022
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260030
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]. 中国科学院青藏高原研究所,2020,295.
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.
MLA	Li, Peilin,et al."Elevation dependence of drought legacy effects on vegetation greenness over the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 295(2020).