干旱区生态环境知识资源中心(Arid): Drought-induced tree growth decline in the desert margins of Northwestern China

Arid

DOI	10.1016/j.dendro.2020.125685
	Drought-induced tree growth decline in the desert margins of Northwestern China
	Wang, Xiaofeng 1,2; Yang, Bao1,3 ; Li, Gang 4
通讯作者	Yang, Bao
来源期刊	DENDROCHRONOLOGIA
ISSN	1125-7865
EISSN	1612-0051
出版年	2020
卷号	60
英文摘要	Water deficiency is the primary limiting factor for tree growth in arid and semi-arid areas. Droughts associated with rising temperatures have increased in severity and frequency globally over the past few decades, making the trees in the drought-prone sites first be affected by water shortages. However, our understanding of tree growth status in these areas, and of their response to drought, is currently insufficient; especially in the context of global warming. Here, we studied 94 Chinese pine (Pinus tabulaeformis) and 86 spruce (Picea crassifolia) trees from different altitudes [2,100-2400 m above sea level (a.s.l.)] distributed at the desert margins of Northwestern China to explore tree growth and drought response from multiple perspectives using dendroecological approaches. Significant growth decline, across all tree species and altitudes, was detected in response to an interdecadal trend towards a drier climate. Moreover, the extent of tree growth decline, the proportion of affected trees, and the degree of moisture dependence have all tended to increase in each sample site, most likely due to enhanced drought severity and duration in recent decades. The more sensitive and susceptible trees were found at lower elevations (drier sites) and may signify a higher vulnerability to heating-induced drought stress. Tree resistance to drought showed strong negative correlation with drought severity across all sample sites. However, the connection between post-drought tree resilience and drought intensity is weak, perhaps because the samples were all collected from living trees, while those that had died were not sampled. The priority for future work should be to combine surviving and dead trees simultaneously, thus achieving a more representative view of tree resilience to drought; this will improve our knowledge of forest dynamics and even ecosystem succession in these vulnerable and sensitive environments.
英文关键词	Growth decline Drought Global warming Altitude gradient Resistance Vulnerability
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000524972400008
WOS关键词	CLIMATE-CHANGE ; SILVER FIR ; GLOBAL TEMPERATURE ; MOUNTAIN REGION ; HELAN MOUNTAIN ; NORWAY SPRUCE ; DIE-OFF ; MORTALITY ; RECONSTRUCTION ; RESPONSES
WOS类目	Forestry ; Geography, Physical
WOS研究方向	Forestry ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314311
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Donggang West Rd 320, Lanzhou 73000, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 10048, Peoples R China; 3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 4.Dongdashan Nat Reserve, Ganzhou Dist 734000, Zhangye, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaofeng,Yang, Bao,Li, Gang. Drought-induced tree growth decline in the desert margins of Northwestern China[J],2020,60.
APA	Wang, Xiaofeng,Yang, Bao,&Li, Gang.(2020).Drought-induced tree growth decline in the desert margins of Northwestern China.DENDROCHRONOLOGIA,60.
MLA	Wang, Xiaofeng,et al."Drought-induced tree growth decline in the desert margins of Northwestern China".DENDROCHRONOLOGIA 60(2020).