Water use patterns of three species in subalpine forest, Southwest China: the deuterium isotope approach

doi:10.1002/eco.179

CORC > 武汉植物园 > 中国科学院武汉植物园

	Water use patterns of three species in subalpine forest, Southwest China: the deuterium isotope approach
	Xu, Qing 1; Li, Harbin 2; Chen, Jiquan 3; Cheng, Xiaoli 4; Liu, Shirong 1; An, Shuqing 5
刊名	ECOHYDROLOGY
	2011-03-01
卷号	4 期号:2 页码:236-244
关键词	water use strategies stable deuterium isotope soil water distribution root distribution Wolong Natural Reserve
ISSN号	1936-0584
DOI	10.1002/eco.179
英文摘要	Determination of water sources of plant species in a community is critical for understanding the hydrological processes and their importance in ecosystem functions. Such partitioning of plant xylem water into specific sources (i.e. precipitation, groundwater) can be achieved by analysing deuterium isotopic composition (delta D) values for source waters. A subalpine dark coniferous forest in southwestern China was selected to examine water use strategies of three key species. Our objectives are to: (1) determine contributions of rainfall and groundwater to soil and xylem water and (2) examine effects of rain, days after rain, soil depth, and species on such contributions. We found that the three species tend to have different, but complementary water use patterns. The dominant canopy tree of Abies faxoniana relies primarily on groundwater (i.e. 66-96% of its water sources) and does not change its dependency on groundwater between seasons. In contrast, the midstory Betula utilis and the understory Bashania fangiana depend predominantly on rainwater (i.e. 13-94% and 32-93%, respectively), and tend to use water opportunistically, switching to groundwater as the main source under stressful conditions during the dry season. The complementary and, for some species, shifting water use strategies and the lack of dependency on rainwater by the foundation species of the subalpine coniferous forest ecosystem should act together to promote species co-existence and maintain community resiliency under potentially increasing water stress caused by climate change. Copyright (C) 2010 John Wiley & Sons, Ltd.
资助项目	China Natural Science Foundation[30771712] ; National Basic Research Projects[2002CB111504] ; China State Forestry Administration[2006-4-04] ; China State Forestry Administration[200804001]
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000289263900009
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/889]
专题	中国科学院武汉植物园
通讯作者	Xu, Qing
作者单位	1.Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, Lab Forest Ecol & Environm, State Forestry Adm, Beijing 100091, Peoples R China 2.US Forest Serv, USDA, So Res Stn, Ctr Forested Wetlands Res, Cordesville, SC 29434 USA 3.Univ Toledo, Dept Environm Sci, Landscape & Ecosyst Sci LEES, Toledo, OH 43606 USA 4.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Peoples R China 5.Nanjing Univ, Coll Life Sci, Lab Forest Ecol & Global Change, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Xu, Qing,Li, Harbin,Chen, Jiquan,et al. Water use patterns of three species in subalpine forest, Southwest China: the deuterium isotope approach[J]. ECOHYDROLOGY,2011,4(2):236-244.
APA	Xu, Qing,Li, Harbin,Chen, Jiquan,Cheng, Xiaoli,Liu, Shirong,&An, Shuqing.(2011).Water use patterns of three species in subalpine forest, Southwest China: the deuterium isotope approach.ECOHYDROLOGY,4(2),236-244.
MLA	Xu, Qing,et al."Water use patterns of three species in subalpine forest, Southwest China: the deuterium isotope approach".ECOHYDROLOGY 4.2(2011):236-244.