干旱区生态环境知识资源中心(Arid): The influence of biological soil crusts on ~(15)N translocation in soil and vascular plant in a temperate desert of northwestern China

Arid

	The influence of biological soil crusts on ~(15)N translocation in soil and vascular plant in a temperate desert of northwestern China
	Zhuang Weiwei; Downing Alison; Zhang Yuanming
来源期刊	Journal of Plant Ecology
ISSN	1752-9921
出版年	2015
卷号	8 期号:4 页码:420-428
英文摘要	Aims Desert ecosystems are often characterized by patchy distribution of vascular plants, with biological soil crusts (BSC) covering interplant spaces. However, few studies have comprehensively examined the linkage between BSC and vascular plants through nitrogen (N) or element translocation. The objective of this study was to evaluate the ecological roles of BSC on N translocation from soil to the dominant herb Erodium oxyrrhynchum Bieb. (Geraniaceae) in a temperate desert in China. Methods Isotopes (including ~(15)N-Glu, ~(15)N-NH_4CI and ~(15)N-NaNO_3) were used as a tracer to detect translocation of N in two types of desert soil (BSC covered; bare) to the dominant herb E. oxyrrhynchum. Three different forms of ~(15)N-enriched N compounds were applied as a point source to small patches of BSC and to bare soil. And we measured isotopes (~(14)N and ~(15)N) and obtained the concentration of labeled-~(15)N in both vascular plants and soils at different distances from substrate application Important Findings Plants of E. oxyrrhynchum growing in BSC-covered plots accumulated more delta~(15)N than those growing in the bare soil. Similarly, soil from BSCcovered plots showed a higher concentration of labeled-N irrespective of form of isotope, than did the bare soil. The concentration of dissolved organic N (~(15)N-Glu) in E. oxyrrhynchum was higher than that of dissolved inorganic N (~(15)N-NH_4CI and ~(15)N-NaNO_3). Soil covered by BSC also accumulated considerably more dissolved organic N than bare soil, whereas the dominant form of ~(15)N concentrated in bare soil was dissolved inorganic N. Correlation analysis showed that the concentration of labeled-N in plants was positively related to the concentration of labeled-N in soils and the N% recorded in E. oxyrrhynchum. Our study supports the hypothesis that BSC facilitates ~(15)N translocation in soils and vascular plants in a temperate desert of northwestern China.
英文关键词	biological soil crusts nitrogen translocation Erodium oxyrrhynchum temperate desert
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5556157
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335568
作者单位	Zhuang Weiwei, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Key Laboratory of Biogeography and Bioresource in Arid Land,Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Zhang Yuanming, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Key Laboratory of Biogeography and Bioresource in Arid Land,Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Downing Alison, University of Chinese Academy of Sciences, Beijing 100049, China.
推荐引用方式 GB/T 7714	Zhuang Weiwei,Downing Alison,Zhang Yuanming. The influence of biological soil crusts on ~(15)N translocation in soil and vascular plant in a temperate desert of northwestern China[J],2015,8(4):420-428.
APA	Zhuang Weiwei,Downing Alison,&Zhang Yuanming.(2015).The influence of biological soil crusts on ~(15)N translocation in soil and vascular plant in a temperate desert of northwestern China.Journal of Plant Ecology,8(4),420-428.
MLA	Zhuang Weiwei,et al."The influence of biological soil crusts on ~(15)N translocation in soil and vascular plant in a temperate desert of northwestern China".Journal of Plant Ecology 8.4(2015):420-428.