干旱区生态环境知识资源中心(Arid): Water Sources of Dominant Species in Three Alpine Ecosystems on the Tibetan Plateau, China

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	Water Sources of Dominant Species in Three Alpine Ecosystems on the Tibetan Plateau, China
	DeYu Duan; Hua Ouyang; MingHua Song; QiWu Hu
来源期刊	Journal of Integrative Plant Biology
ISSN	1672-9072
出版年	2008
卷号	50 期号:3 页码:257-264
英文摘要	Plant water sources were estimated by two or three compartment linear mixing models using hydrogen and oxygen isotope （deltaD and delta~(18)O） values of different components such as plant xylem water, precipitation and river water as well as soil water on the Tibetan Plateau in the summer of 2005. Four dominant species （Quercus aquifolioides, Pinus tabulaeformis, Salix rehderiana and Nitraria tangutorum） in three typical ecosystems （forest, shrub and desert） were investigated in this study. Stable isotope ratios of the summer precipitations and the soil water presented variations in spatial and temporal scales. delta~(18)O values of N. tangutorum xylem water were constant in the whole growth season and very similar to those of deep soil water. Water sources for all of the plants came from both precipitations and soil water. Plants switched rapidly among different water sources when environmental water conditions changed. Rainwater had different contributions to the plants, which was influenced by amounts of precipitation. The percentage of plant xylem water derived from rainwater rose with an increase in precipitation. Water sources for broad-leaved and coniferous species were different although they grew in the same environmental conditions. For example, the broad-leaved species Q. aquifolioides used mainly the water from deep soil, while 92.5% of xylem water of the coniferous species P. tabulaeformis was derived from rainwater during the growth season. The study will be helpful for us to fully understand responses of species on the Tibetan Plateau to changes in precipitation patterns, and to assess accurately changes of vegetation distribution in the future.
英文关键词	deltaD delta^18O precipitation river water soil water Tibetan Plateau
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3249945
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334966
作者单位	DeYu Duan, Institute of Geographical Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101, China.; Hua Ouyang, Institute of Geographical Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101, China.; MingHua Song, Institute of Geographical Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101, China.; QiWu Hu, Institute of Geographical Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101, China.
推荐引用方式 GB/T 7714	DeYu Duan,Hua Ouyang,MingHua Song,et al. Water Sources of Dominant Species in Three Alpine Ecosystems on the Tibetan Plateau, China[J],2008,50(3):257-264.
APA	DeYu Duan,Hua Ouyang,MingHua Song,&QiWu Hu.(2008).Water Sources of Dominant Species in Three Alpine Ecosystems on the Tibetan Plateau, China.Journal of Integrative Plant Biology,50(3),257-264.
MLA	DeYu Duan,et al."Water Sources of Dominant Species in Three Alpine Ecosystems on the Tibetan Plateau, China".Journal of Integrative Plant Biology 50.3(2008):257-264.