Elevation Pattern in Growth Coherency on the Southeastern Tibetan Plateau

doi:10.1371/journal.pone.0163201

	Elevation Pattern in Growth Coherency on the Southeastern Tibetan Plateau
	Lyu, Lixin ; Deng, Xu 1; Zhang, Qi-Bin
	2016
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	11 期号:9
摘要	It is generally expected that inter-annual changes in radial growth among trees would be similar to the increase in altitude due to the limitation of increasingly harsher climatic factors. Here, we examine whether this pattern exists in alpine forests on the southeastern Tibetan Plateau. Increment cores were collected from mature trees at the lower, middle and upper limits of balfour spruce (Picea likiangensis var. balfouriana (Rehd. et Wils.) Hillier ex Slsvin) forests at the Buze and Yela Mountains in Basu County, Changdu Prefecture of Tibet, China. The treeline elevations are 4320 m and 4510 m a.s.l. for Buze and Yela, respectively. Tree-ring widths were measured, crossdated, and detrended to obtain a sequence of ring-width indices for each individual sample. Annual growth rate, climate sensitivity, growth-climate relationships, and growth synchrony among trees were calculated and compared across altitudes. In Buze Mountain, the annual growth rate of trees has no significant difference across altitudes. The mean sensitivity of trees is lower at the treelines than at lower elevations. Tree growth has stronger correlation with winter temperature at upper elevations than at lower elevations, has significant correlation with moisture, not temperature, in the growing season, and the growth response to moisture is lower at the treeline than at lower elevations. The correlation among individual tree-ring sequences is lower at the treeline than at sites at lower elevation. In Yela Mountain, the characterisitics of annual growth rate, mean sensitivity, tree growth-climate relationships, and inter-serial correlation are similar to those in Buze, but their differences along altitudinal gradients are less significant as those in Buze. Our data do not support the general expectation of growth convergence among individuals with increasing altitude. We conclude that individual heterogeneity and microhabitat diversity are important features for treeline trees that may dampen the growth synchrony in trees. The results obtained in this study expand our knowledge about the pattern of forest growth along altitudinal gradients in high-elevation regions and demonstrate the importance of checking the growth of tree individuals before analyzing the average signal.
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0163201
收录类别	SCI
语种	英语
WOS关键词	TREE GROWTH ; ALTITUDINAL GRADIENT ; PICEA-CRASSIFOLIA ; CLIMATE ; MOUNTAINS ; NORTHERN ; VARIABILITY ; DISTURBANCE ; TIMBERLINE ; TREELINES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000384328500028
出版者	PUBLIC LIBRARY SCIENCE
文献子类	Article
出版地	SAN FRANCISCO
资助机构	National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [31330015, 31361130339, 31170419]
作者邮箱	qbzhang@ibcas.ac.cn
作品OA属性	gold, Green Published, Green Submitted
引用统计	被引频次：26[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/2S10CLM1/25147
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.Chinese Acad Sci, Grad Sch, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Lyu, Lixin,Deng, Xu,Zhang, Qi-Bin. Elevation Pattern in Growth Coherency on the Southeastern Tibetan Plateau[J]. PLOS ONE,2016,11(9).
APA	Lyu, Lixin,Deng, Xu,&Zhang, Qi-Bin.(2016).Elevation Pattern in Growth Coherency on the Southeastern Tibetan Plateau.PLOS ONE,11(9).
MLA	Lyu, Lixin,et al."Elevation Pattern in Growth Coherency on the Southeastern Tibetan Plateau".PLOS ONE 11.9(2016).

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Lyu-2016-Elevation P（3431KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文