气候变化领域集成服务门户(CCPortal): Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?

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DOI	10.1016/j.gloplacha.2016.11.017
	Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?
	Huang, Ru; Zhu, Haifeng; Liu, Xiaohong; Liang, Eryuan; Griessinger, Jussi; Wu, Guoju; Li, Xiaoxia; Brauning, Achim
通讯作者	Liu, XH (通讯作者)
发表日期	2017
ISSN	0921-8181
EISSN	1872-6364
起始页码	217
结束页码	226
卷号	148
英文摘要	Little is known about whether increasing iWUE (intrinsic water use efficiency) can stimulate tree growth in the temperature-limited natural timberlines. Here, we presented the basal area increment (BAI) and iWUE chronologies of Smith fir (Abies georgei var. smithii) from 1900 to 2006 at a high-elevation (ca. 4400 m a.s.l.) timberline in the humid Sygera Mountains, southeastern Tibetan Plateau (TP). The commonality analysis model was applied to investigate the relationships among BAI, temperatures, atmospheric CO2 concentration (C-a) and iWUE during 1961-2006, taking into account of both pure and joint effects. As illustrated by the commonality analysis model, the pure effect of C-a (39.15%) had more stronger influence on iWUE than that of the Tmean (annul mean temperature, 0.12%), but the joint effect between C-a and Tmean (49.79%) on iWUE was stronger than any pure effect for the raw data with an increasing trend. For the first-difference data with year-to-year variations, the pure effect of C-a (7.72%) on iWUE was stronger than that of Tmean (0.59%) and the joint effect between them (0.59%). All above imply the C-a is the dominant factor for iWUE both for the 46-year trend and interannual variations. In addition, as showed by the commonality analysis model, the pure effect of iWUE (17.57%) played a much more important role on BAI than that of temperatures (smt, mean temperature during June, July, August of current year, 5.92%; amt, mean temperature during September, October, November of previous year, 3.04%), while joint effects of iWUE and temperatures contributed more (27.96%; 13.90%; 16.47%) to the BAI than their pure effects for the raw data with an increasing linear trend. For the,first-difference data with interannual variations, the pure effect of smt (12.45%) had much more effect on BAI than that of iWUE (5.49%), at the same time the joint iWUE and temperatures contributed less (3.56%; 1.9%; 1.31%) to the BAI than their pure effects. These results suggest that an increasing iWUE could enhance 46-year increasing tree growth trend at humid and high-elevation timberlines, supporting the CO2 fertilization hypothesis, while temperatures dominate the interannual variations of tree growth. (C) 2016 Elsevier B.V. All rights reserved.
关键词	CARBON-ISOTOPE DISCRIMINATION RISING ATMOSPHERIC CO2 CLIMATE-CHANGE ELEVATED CO2 TEMPERATURE-VARIATIONS STOMATAL CONDUCTANCE ENRICHMENT FACE RADIAL GROWTH PAST CENTURY SMITH FIR
英文关键词	Upper timberline; Tree growth; Intrinsic water use efficiency; CO2 fertilization; Climate warming; Southeastem Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000393528200018
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259040
推荐引用方式 GB/T 7714	Huang, Ru,Zhu, Haifeng,Liu, Xiaohong,et al. Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?[J]. 中国科学院青藏高原研究所,2017,148.
APA	Huang, Ru.,Zhu, Haifeng.,Liu, Xiaohong.,Liang, Eryuan.,Griessinger, Jussi.,...&Brauning, Achim.(2017).Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?.GLOBAL AND PLANETARY CHANGE,148.
MLA	Huang, Ru,et al."Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?".GLOBAL AND PLANETARY CHANGE 148(2017).