%0 Journal Article
%T Species diversity of pasture community at different altitude levels in Qilian Mountains<br>祁连山区不同海拔草地群落的物种多样性
%A CHANG Xuexiang
%A ZHAO Wenzhi
%A ZHAO Aifen
%A <br>常学向
%A 赵文智
%A 赵爱芬
%J 应用生态学报
%D 2004
%I 
%X According to the occurring frequency and life form of plant species at different altitude levels, this paper studied the changing characteristics of the species a diversity of pasture community at the altitude from 2500 m to 3000 m in Qilian Mountains. The results showed that with increasing altitude, the Shannon-Wiener species diversity index increased from 1.432 to 1.832, and the variety of Simpson index was very complicated. An altitude of 2701-2800 m was an important turning point for species diversity. In pasture community of Qilian Mountains, the percentage of the poisonous and the less edible species exceeded 50%, and their biomass was more than 60% of the total biomass of the community. The biodiversity showed a degraded trend.
%K Species diversity
%K Biodiversity index
%K Species richness
%K Altitude level
%K Qilian Mountains<br>物种多样性
%K 物种多样性指数
%K 物种丰富度
%K 海拔带
%K 祁连山区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=57ADEF3029E1E556&yid=D0E58B75BFD8E51C&vid=23CCDDCD68FFCC2F&iid=9CF7A0430CBB2DFD&sid=7C7B8F426F4B99BA&eid=2E97FDBA239991ED&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=11&reference_num=32