| Does increasing intrinsic water use efficiency (iWUE) stimulate tree growth at natural alpine timberline on the southeastern Tibetan Plateau? | |
| 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); Liu, XH | |
| Source Publication | GLOBAL AND PLANETARY CHANGE
 |
| 2017 | |
| Volume | 148Issue:0Pages:217-226 |
| DOI | 10.1016/j.gloplacha.2016.11.017 |
| Abstract | 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. |
| Subject Area | 自然地理学 |
| WOS ID | WOS:000393528200018 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | CARBON-ISOTOPE DISCRIMINATION RISING ATMOSPHERIC CO2 CLIMATE-CHANGE ELEVATED CO2 TEMPERATURE-VARIATIONS DIOXIDE CONCENTRATIONS STOMATAL CONDUCTANCE PINUS-TABULAEFORMIS EUROPEAN FORESTS ENRICHMENT FACE |
| WOS Research Area | Physical Geography; Geology |
| WOS Subject | Geography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology |
| Cooperation Status | 国际 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8397 |
| Collection | 图书馆 |
| Corresponding Author | Liu, XH |
| Affiliation | 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 GB/T 7714 | 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. |
| APA | Huang, R .,Zhu, HF .,Liu, XH .,Liang, EY .,Griessinger, J .,...&Liu, XH.(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(0),217-226. |
| MLA | Huang, R ,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 148.0(2017):217-226. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.148 217-226 2017.p（791KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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