Recent Warming-Induced Tree Growth Enhancement at the Tibetan Treeline and the Link to Improved Water-Use Efficiency

doi:10.3390/f12121702

	Recent Warming-Induced Tree Growth Enhancement at the Tibetan Treeline and the Link to Improved Water-Use Efficiency
	Pu, Xing 1; Wang, Xiaochun 2; Lyu, Lixin
	2021
发表期刊	FORESTS
卷号	12 期号:12
摘要	Tree growth in high-elevation forests may increase as a result of increasing temperatures and CO2 concentrations in the atmosphere (C-a). However, the pattern and the physiological mechanism on how these two factors interact to affect tree growth are still poorly understood. Here, we analyzed the temporal changes in radial growth and tree-ring delta C-13 for Picea and Abies trees growing in both treeline and lower-elevation forests on the Tibetan Plateau. We found that the tree growth at the treeline has significantly accelerated during the past several decades but has remained largely stable or slightly declined at lower elevations. Further results based on tree-ring delta C-13 suggest that intrinsic water-use efficiency (iWUE) was generally higher at the treeline than in lower-elevation forests, although increasing trends of iWUE existed for all sites. This study demonstrated that the synergetic effects of elevated C-a and increasing temperatures have increased tree growth at the treeline but may not lead to enhanced tree growth in lower-elevation forests due to drought stress. These results demonstrate the elevational dependence of tree growth responses to climatic changes in high-elevation forests from a physiologically meaningful perspective.
关键词	tree rings cellulose stable isotopes elevation water-use efficiency high-elevation forests drought stress
学科领域	Forestry
DOI	10.3390/f12121702
收录类别	SCI
语种	英语
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; CLIMATE-CHANGE ; PINE ; CO2 ; VULNERABILITY ; DELTA-C-13 ; MORTALITY ; RESPONSES ; ALTITUDE ; IMPACTS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000737658500001
出版者	MDPI
文献子类	Article
出版地	BASEL
EISSN	1999-4907
作者邮箱	puxing201123@ibcas.ac.cn ; wangx@nefu.edu.cn ; lixinlv@ibcas.ac.cn
作品OA属性	gold
引用统计	被引频次：3[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/2S10CLM1/26657
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 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 3.Northeast Forestry Univ, Sch Forestry, Key Lab Sustainable Forest Ecosyst Management, Minist Educ, Harbin 150040, Peoples R China
推荐引用方式 GB/T 7714	Pu, Xing,Wang, Xiaochun,Lyu, Lixin. Recent Warming-Induced Tree Growth Enhancement at the Tibetan Treeline and the Link to Improved Water-Use Efficiency[J]. FORESTS,2021,12(12).
APA	Pu, Xing,Wang, Xiaochun,&Lyu, Lixin.(2021).Recent Warming-Induced Tree Growth Enhancement at the Tibetan Treeline and the Link to Improved Water-Use Efficiency.FORESTS,12(12).
MLA	Pu, Xing,et al."Recent Warming-Induced Tree Growth Enhancement at the Tibetan Treeline and the Link to Improved Water-Use Efficiency".FORESTS 12.12(2021).

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