Tree-Ring Isotopes Provide Clues for Sink Limitation on Treeline Formation on the Tibetan Plateau

doi:10.3390/atmos12050540

	Tree-Ring Isotopes Provide Clues for Sink Limitation on Treeline Formation on the Tibetan Plateau
	Pu, Xing 1; Wang, Xiaochun 2; Lyu, Lixin
	2021
发表期刊	ATMOSPHERE
卷号	12 期号:5
摘要	Identifying what determines the high elevation limits of tree growth is crucial for predicting how treelines may shift in response to climate change. Treeline formation is either explained by a low-temperature restriction of meristematic activity (sink limitation) or by the photosynthetic constraints (source limitation) on the trees at the treeline. Our study of tree-ring stable isotopes in two Tibetan elevational transects showed that treeline trees had higher iWUE than trees at lower elevations. The combination of tree-ring delta C-13 and delta O-18 data further showed that photosynthesis was higher for trees at the treeline than at lower elevations. These results suggest that carbon acquisition may not be the main determinant of the upper limit of trees; other processes, such as immature tissue growth, may be the main cause of treeline formation. The tree-ring isotope analysis (delta C-13 and delta O-18) suggests that Tibetan treelines have the potential to benefit from ongoing climate warming, due to their ability to cope with co-occurring drought stress through enhanced water use efficiency.
关键词	alpine treeline water use efficiency elevation tree rings stable isotopes sink limitation
学科领域	Environmental Sciences ; Meteorology & Atmospheric Sciences
DOI	10.3390/atmos12050540
收录类别	SCI
语种	英语
WOS关键词	WATER-USE EFFICIENCY ; WESTERN TIANSHAN MOUNTAINS ; PINUS-SYLVESTRIS ; STOMATAL CONDUCTANCE ; CARBON ISOTOPES ; SCHRENK SPRUCE ; SCOTS PINE ; GROWTH ; CO2 ; PHOTOSYNTHESIS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000653397800001
出版者	MDPI
文献子类	Article
出版地	BASEL
EISSN	2073-4433
资助机构	Natural Science Foundation of China [41771060, 31870460] ; Open Grant for Key Laboratory of Sustainable Forest Ecosystem Management (Northeast Forestry University), Ministry of Education [KFJJ2019YB01] ; Institute of Botany, Chinese Academy of Sciences
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：5[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/2S10CLM1/26656
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, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100093, 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. Tree-Ring Isotopes Provide Clues for Sink Limitation on Treeline Formation on the Tibetan Plateau[J]. ATMOSPHERE,2021,12(5).
APA	Pu, Xing,Wang, Xiaochun,&Lyu, Lixin.(2021).Tree-Ring Isotopes Provide Clues for Sink Limitation on Treeline Formation on the Tibetan Plateau.ATMOSPHERE,12(5).
MLA	Pu, Xing,et al."Tree-Ring Isotopes Provide Clues for Sink Limitation on Treeline Formation on the Tibetan Plateau".ATMOSPHERE 12.5(2021).

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