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学科主题: 地理学::自然地理学
题名: Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?
作者: Huang, R (Huang, Ru)1, 3; Zhu, HF (Zhu, Haifeng)1, 6; Liu, XH (Liu, Xiaohong)2, 5; Liang, EY (Liang, Eryuan)1; Griessinger, J (Griessinger, Jussi)4; Wu, GJ (Wu, Guoju)2; Li, XX (Li, Xiaoxia)1; Brauning, A (Brauning, Achim)
通讯作者: Liu, XH
关键词: CARBON-ISOTOPE DISCRIMINATION ; RISING ATMOSPHERIC CO2 ; CLIMATE-CHANGE ; ELEVATED CO2 ; TEMPERATURE-VARIATIONS ; DIOXIDE CONCENTRATIONS ; STOMATAL CONDUCTANCE ; PINUS-TABULAEFORMIS ; EUROPEAN FORESTS ; ENRICHMENT FACE
刊名: GLOBAL AND PLANETARY CHANGE
发表日期: 2017
DOI: 10.1016/j.gloplacha.2016.11.017
卷: 148, 期:0, 页:217-226
收录类别: SCI
合作性质: 国际
文章类型: Article
类目[WOS]: Geography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology
研究领域[WOS]: Physical Geography; Geology
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.
语种: 英语
WOS记录号: WOS:000393528200018
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/8397
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China.
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China.
4.Univ Erlangen Nurnberg, Inst Geog, Wetterkreuz 15, D-91058 Erlangen, Germany.
5.Shaanxi Normal Univ, Tourism & Environm Coll, Xian 710119, Peoples R China.
6.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.

Recommended Citation:
Huang, R ,Zhu, HF ,Liu, XH ,et al. Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau?[J]. GLOBAL AND PLANETARY CHANGE,2017,148(0):217-226.
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