气候变化领域集成服务门户(CCPortal): Climate warming and increasing atmospheric CO2 have contributed to increased intrinsic water-use efficiency on the northeastern Tibetan Plateau since 1850

CCPortal

DOI	10.1007/s00468-013-0855-3
	Climate warming and increasing atmospheric CO2 have contributed to increased intrinsic water-use efficiency on the northeastern Tibetan Plateau since 1850
	Xu, Guobao; Liu, Xiaohong; Qin, Dahe; Chen, Tuo; An, Wenling; Wang, Wenzhi; Wu, Guoju; Zeng, Xiaomin; Ren, Jiawen
发表日期	2013
ISSN	0931-1890
起始页码	465
结束页码	475
卷号	27 期号:2
英文摘要	We investigated the physiological responses of Tibetan juniper (Sabina tibetica) to changes in the atmospheric CO2 concentration (C (a)) and climate on the northeastern Tibetan Plateau based on annual tree-ring delta C-13 values since 1850. Intrinsic water-use efficiency (iWUE) increased, and the internal to ambient CO2 ratio (C (i) /C (a)) showed no significant trend from 1895 to 1974 in the study region, indicating an active response to changing C (a). The long-term trends in iWUE in the naturally occurring trees were mainly caused by the anthropogenic increase in C (a). However, from 1975 to 2002, iWUE increased rapidly at the study site (by 12.4 % compared with the overall mean from 1850 to 2002), which is greater than the expected increase due only to an active response to C (a). Our analysis showed that decreased water availability caused by greater evaporation due to decreased precipitation and a warming growth environment from 1975 to 2002 may have reduced stomatal conductance, leading to a higher iWUE. The warming climate and increased C (a) accounted for 83.6 % of the variance in iWUE of Tibetan juniper on the northeastern Tibetan Plateau from 1975 to 2002.
英文关键词	Sabina tibetica; Intrinsic water-use efficiency; Climate warming; Tree-ring delta C-13; Ecophysiological parameters
WOS研究方向	Forestry
WOS类目	Forestry
来源期刊	TREES-STRUCTURE AND FUNCTION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158615
作者单位	Liu, XH (corresponding author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Donggang West Rd 320, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Guobao,Liu, Xiaohong,Qin, Dahe,et al. Climate warming and increasing atmospheric CO2 have contributed to increased intrinsic water-use efficiency on the northeastern Tibetan Plateau since 1850[J],2013,27(2).
APA	Xu, Guobao.,Liu, Xiaohong.,Qin, Dahe.,Chen, Tuo.,An, Wenling.,...&Ren, Jiawen.(2013).Climate warming and increasing atmospheric CO2 have contributed to increased intrinsic water-use efficiency on the northeastern Tibetan Plateau since 1850.TREES-STRUCTURE AND FUNCTION,27(2).
MLA	Xu, Guobao,et al."Climate warming and increasing atmospheric CO2 have contributed to increased intrinsic water-use efficiency on the northeastern Tibetan Plateau since 1850".TREES-STRUCTURE AND FUNCTION 27.2(2013).