干旱区生态环境知识资源中心(Arid): Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi,NW China's Gansu Province

Arid

	Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi,NW China's Gansu Province
	Liu Hongyan; Xu Lihong; Chen Changdu; Cui Haiting; Xu Xingying
来源期刊	Journal of Environmental Sciences
ISSN	1001-0742
出版年	2002
卷号	14 期号:3 页码:380-387
英文摘要	Anxi County is located in the northwestern part of the Hexi Corridor in Gansu Province and has the sole national level nature reserve of extremely-arid desert in China.Phytosociological methods (Braun-Blanquet,1964) are used to classify plant community types in this area.Eleven are distinguished,including six of deserts,four of oases and one transitional type between deserts and oases.Direct gradient analysis ( DCA ) is employed to correlate the distribution of plant communities to physiogeographic conditions.This study makes clear that water is the most important ecological factor for the distribution of plant species and communities in this area.The effects of water have been demonstrated in different ways.A vegetation gradient from lower altitude to higher altitude in the southern part of the reserve is driven by a precipitation gradient.The effects of the depth of ground water table contribute to the differentiation of vegetation from desert to oasis in the flat area.In a finer scale,the washed gullies have obviously higher species richness and also higher vegetation cover than the surround gobi surfaces,possibly caused by the effects of floods.The vegetation patterns demonstrate that the area of Anxi County is a complete landscape unit.The range of the current nature reserve is not large enough for the purpose of conserving the unique biodiversity in this area.
英文关键词	extremely-arid desert vegetation pattern nature reserve Central Asia gobi
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:1364111
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334825
作者单位	Liu Hongyan, Department of Urban and Environmental Sciences,Peking University, MOE Lab.for Earth Surface Processes, BeiJing 100871, China.; Xu Lihong, Department of Urban and Environmental Sciences,Peking University, MOE Lab.for Earth Surface Processes, BeiJing 100871, China.; Chen Changdu, Department of Urban and Environmental Sciences,Peking University, MOE Lab.for Earth Surface Processes, BeiJing 100871, China.; Cui Haiting, Department of Urban and Environmental Sciences,Peking University, MOE Lab.for Earth Surface Processes, BeiJing 100871, China.; Xu Xingying, Management Bureau of Anxi Extremely-Arid Desert National Nature Reserve, Anxi County, 736100.
推荐引用方式 GB/T 7714	Liu Hongyan,Xu Lihong,Chen Changdu,et al. Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi,NW China's Gansu Province[J],2002,14(3):380-387.
APA	Liu Hongyan,Xu Lihong,Chen Changdu,Cui Haiting,&Xu Xingying.(2002).Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi,NW China's Gansu Province.Journal of Environmental Sciences,14(3),380-387.
MLA	Liu Hongyan,et al."Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi,NW China's Gansu Province".Journal of Environmental Sciences 14.3(2002):380-387.