%0 Journal Article
%T Plant species richness of alpine grasslands in relation to environmental factors and biomass on the Tibetan Plateau<br>青藏高原高寒草地植物物种丰富度及其与环境因子和生物量的关系
%A YANG Yuan-He
%A RAO Sheng
%A HU Hui-Feng
%A CHEN An-Ping
%A JI Cheng-Jun
%A ZHU Biao
%A ZUO Wen-Yun
%A LI Xuan-Ran
%A SHEN Hai-Hua
%A WANG Zhi-Heng
%A TANG Yan-Hong
%A FANG Jing-Yun
%A <br>杨元合
%A 饶胜
%A 胡会峰
%A 陈安平
%A 吉成均
%A 朱彪
%A 左闻韵
%A 李轩然
%A 沈海花
%A 王志恒
%A 唐艳鸿
%A 方精云
%J 生物多样性
%D 2004
%I Science Press
%X Patterns of biodiversity along environmental gradients is one of the basic issues in biodiversity research. Furthermore, the relationship between species richness and aboveground biomass is one of the most controversial subjects in ecology. In this paper, we studied the patterns of species richness along environmental gradients and the relationship between species richness and aboveground biomass in two major ecosystem types on the Tibetan Plateau, alpine meadow and alpine steppe. The results are summarized as follows: (1) 267 species were recorded in 250 plots of 50 sites, 179 of which occurred in alpine meadows and 135 in alpine steppe. The number of species ranged from 3 to 32 in alpine meadow, while it ranged from 2 to 18 in alpine steppe. (2) Species richness increased with latitude and longitude, and decreased with altitude. A stepwise regression analysis of species richness and environmental factors showed that the species richness was significantly correlated with growing season precipitation and warmth index. (3) Species richness was positively correlated with aboveground biomass.
%K aboveground biomass
%K alpine meadow
%K alpine steppe
%K Tibetan Plateau
%K species richness<br>地上生物量
%K 高寒草原
%K 高寒草甸
%K 物种丰富度
%K 青藏高原
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=284A3BE2D09272C2DA95716775015427&aid=4D29315D137877A5&yid=D0E58B75BFD8E51C&vid=59906B3B2830C2C5&iid=CA4FD0336C81A37A&sid=1E41DF9426604740&eid=EF27C460877D3C9F&journal_id=1005-0094&journal_name=生物多样性&referenced_num=25&reference_num=32