气候变化领域集成服务门户(CCPortal): Water sources and water-use efficiency of desert plants in different habitats in Dunhuang, NW China

CCPortal

DOI	10.1007/s11284-017-1433-8
	Water sources and water-use efficiency of desert plants in different habitats in Dunhuang, NW China
	Cui, Yong-Qin; Ma, Jian-Ying; Feng, Qi; Sun, Jia-Huan; Sun, Wei
发表日期	2017
ISSN	0912-3814
EISSN	1440-1703
卷号	32 期号:2
英文摘要	To understand habitat associated differences in desert plant water-use patterns, water stable oxygen isotope composition was used to determine water source and leaf carbon isotope composition (delta C-13) was used to estimate long-term water-use efficiency in three typical habitats (saline land, sandy land and Gobi) in Dunhuang. The primary findings are: (1) in the three habitats, plant species used mainly deep soil water (> 120 cm), except for Kalidium foliatum in the saline land, which relied primarily on 0-40 cm soil water; (2) in the saline land and Gobi habitat, Alhagi sparsifolia had the most negative foliar delta C-13; in the sandy land, Elaeagnus angustifolia leaf was enriched in C-13 than the other three species in 2011, but no species differences in foliar delta C-13 was observed among the four species in 2012; (3) common species (Tamarix ramosissima and A. sparsifolia) may alter their water sources to cope with habitat differences associated changes in soil water availability with deeper water sources were used in the Gobi habitat with lower soil water content (SWC) compared to in the saline land and sandy land; (4) we detected significant habitat differences in foliar delta C-13 in A. sparsifolia which may have resulted from differences in SWC and soil electrical conductivity. However, no habitat differences in foliar delta C-13 were observed in T. ramosissima, which may attribute to the strong genetic control in T. ramosissima or the ability to access stable deep soil water. Overall, the results suggest that extremely arid climate, root distribution and soil properties worked together to determine plant water uptake in Dunhuang area.
关键词	Desert plant Stable isotope Water sources IsoSource model Water-use efficiency
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Ecology
来源期刊	ECOLOGICAL RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111934
作者单位	Chinese Acad Sci, Alashan Desert Ecohydrol Expt Res Stn, Key Lab Ecohydrol Inland River Basin, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Cui, Yong-Qin,Ma, Jian-Ying,Feng, Qi,et al. Water sources and water-use efficiency of desert plants in different habitats in Dunhuang, NW China[J]. 中国科学院西北生态环境资源研究院,2017,32(2).
APA	Cui, Yong-Qin,Ma, Jian-Ying,Feng, Qi,Sun, Jia-Huan,&Sun, Wei.(2017).Water sources and water-use efficiency of desert plants in different habitats in Dunhuang, NW China.ECOLOGICAL RESEARCH,32(2).
MLA	Cui, Yong-Qin,et al."Water sources and water-use efficiency of desert plants in different habitats in Dunhuang, NW China".ECOLOGICAL RESEARCH 32.2(2017).