干旱区生态环境知识资源中心(Arid): Hydrogen isotopic composition of plant leaf wax in response to soil moisture in an arid ecosystem of the northeast Qinghai-Tibetan Plateau, China

Arid

	Hydrogen isotopic composition of plant leaf wax in response to soil moisture in an arid ecosystem of the northeast Qinghai-Tibetan Plateau, China
	Yao Yuan; Liu Weiguo
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:5 页码:592-600
英文摘要	The hydrogen isotopic composition of plant leaf wax(deltaD_(wax)) is used as an important tool for paleohydrologic reconstruction. However, the understanding of the relative importance of environmental and biological factors in determining deltaD_(wax) values still remains incomplete. To identify the effects of soil moisture and plant physiology on deltaD_(wax) values in an arid ecosystem, and to explore the implication of these values for paleoclimatic reconstruction, we measured deltaD values of soil water(deltaD_(water)) and deltaD_(wax) values in surface soils along two distance transects extending from the lakeshore to wetland to dryland around Lake Qinghai and Lake Gahai on the northeast Qinghai-Tibetan Plateau. The results showed that the deltaD_(water) values were negatively correlated with soil water content(SWC)(R~2=0.9166), and ranged from -67 to -46 with changes in SWC from 6.2% to 42.1% in the arid areas of the Gangcha(GCh) and Gahai(GH) transects. This indicated that evaporative D-enrichment in soil water was sensitive to soil moisture in an arid ecosystem. Although the shift from grasses to shrubs with increasing aridity occurred in the arid area of the GH transect, the deltaD_(wax) values in surface soils from the arid areas of the two transects still showed a negative correlation with SWC(R~2=0.6835), which may be due to the controls of primary evaporative D-enrichment in the soil water and additional transpirational D-enrichment in the leaf water on the deltaD_(wax) values. Our preliminary research suggested that deltaD_(wax) values can potentially be applied as a paleo-humidity indicator on the northeast Qinghai-Tibetan Plateau.
英文关键词	hydrogen isotope D-enrichment soil water content northeast Qinghai-Tibetan Plateau
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5203530
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335393
作者单位	Yao Yuan, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710049, China.; Liu Weiguo, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710049, China.
推荐引用方式 GB/T 7714	Yao Yuan,Liu Weiguo. Hydrogen isotopic composition of plant leaf wax in response to soil moisture in an arid ecosystem of the northeast Qinghai-Tibetan Plateau, China[J],2014,6(5):592-600.
APA	Yao Yuan,&Liu Weiguo.(2014).Hydrogen isotopic composition of plant leaf wax in response to soil moisture in an arid ecosystem of the northeast Qinghai-Tibetan Plateau, China.Journal of Arid Land,6(5),592-600.
MLA	Yao Yuan,et al."Hydrogen isotopic composition of plant leaf wax in response to soil moisture in an arid ecosystem of the northeast Qinghai-Tibetan Plateau, China".Journal of Arid Land 6.5(2014):592-600.