The frequency and severity of past droughts shape the drought sensitivity of juniper trees on the Tibetan plateau

doi:10.1016/j.foreco.2021.118968

	The frequency and severity of past droughts shape the drought sensitivity of juniper trees on the Tibetan plateau
	Fang, Ouya 1; Zhang, Qi-Bin ; Vitasse, Yann 1; Zweifel, Roman 1; Cherubini, Paolo 1,2
	2021
发表期刊	FOREST ECOLOGY AND MANAGEMENT
ISSN	0378-1127
卷号	486
摘要	The resistance of forests to extreme climatic events such as drought shapes their sensitivity to future extreme events in space and time. To a large extent, the ability of trees to learn from prior droughts explains how trees adjust their sensitivity to water deficit. We use tree-ring width data collected from 1565 juniper trees (Juniperus prezwalskii and Juniperus tibetica) across 57 sites on the Tibetan Plateau to model tree resistance to water deficit and to map drought sensitivity across the species' distribution. We test the effect of both the frequency and severity of drought on the drought memory of trees. We find that trees at mid-latitudes and in the northwestern part of the juniper distribution range exhibit higher drought sensitivity. Water deficit is the main factor controlling tree resistance and thus affects spatial sensitivity to drought. At wetter sites, higher drought frequency enhances tree adaptability through ecological memory, thereby promoting tree resistance and decreasing tree sensitivity to extreme drought events. At drier sites, higher drought frequency causes junipers' growth decline that is not beneficial for tolerance to extreme drought events. Regional drought conditions and the frequency of pre-droughts affect tree resistance and sensitivity to extreme drought events. This explains the spatial pattern of drought risk for juniper forests on the Tibetan Plateau, and helps us to better understand the vulnerability of this high-elevation forest ecosystem. Such information is important for maintaining forest health and informing the sustainable development of the Tibetan Plateau under a changing climate.
关键词	Resistance Resilience Dendroecology Tree rings Juniper Drought
学科领域	Forestry
DOI	10.1016/j.foreco.2021.118968
收录类别	SCI
语种	英语
WOS关键词	GROWTH DECLINE ; ABIES-ALBA ; CLIMATE ; RESILIENCE ; FOREST ; RESISTANCE ; DIVERSITY ; CLASSIFICATION ; MORTALITY ; PATTERNS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000621599200011
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-7042
资助机构	Second Tibetan Plateau Scientific Expedition and Research Program, China (STEP) [2019QZKK0301] ; National Natural Science Foundation of China, China [31870460, 31700412]
作者邮箱	qbzhang@ibcas.ac.cn
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26584
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Swiss Fed Res Inst WSL, Birmensdorf, Switzerland 3.Univ British Columbia, Dept Forest & Conservat Sci, Forest Sci Ctr, Vancouver, BC, Canada
推荐引用方式 GB/T 7714	Fang, Ouya,Zhang, Qi-Bin,Vitasse, Yann,et al. The frequency and severity of past droughts shape the drought sensitivity of juniper trees on the Tibetan plateau[J]. FOREST ECOLOGY AND MANAGEMENT,2021,486.
APA	Fang, Ouya,Zhang, Qi-Bin,Vitasse, Yann,Zweifel, Roman,&Cherubini, Paolo.(2021).The frequency and severity of past droughts shape the drought sensitivity of juniper trees on the Tibetan plateau.FOREST ECOLOGY AND MANAGEMENT,486.
MLA	Fang, Ouya,et al."The frequency and severity of past droughts shape the drought sensitivity of juniper trees on the Tibetan plateau".FOREST ECOLOGY AND MANAGEMENT 486(2021).

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