生物多样性 ›› 2004, Vol. 12 ›› Issue (1): 200-205.DOI: 10.17520/biods.2004024

所属专题: 探索中国山地植物多样性的分布规律

• 论文 • 上一篇    下一篇

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

杨元合, 饶胜, 胡会峰, 陈安平, 吉成均, 朱彪, 左闻韵, 李轩然, 沈海花, 王志恒, 唐艳鸿2, 方精云   

  1. 1 (北京大学环境学院生态学系,北京大学生态学研究与教育中心,北京大学地表过程分析与模拟教育部重点实验室,北京 100871)
    2 (日本国立环境研究所,日本筑波 3058506)
  • 收稿日期:2003-06-12 修回日期:2003-09-10 出版日期:2004-01-20 发布日期:2004-01-20
  • 通讯作者: 杨元合

Plant species richness of alpine grasslands in relation to environmental factors and biomass on the Tibetan Plateau

YANG Yuan-He, RAO Sheng, HU Hui-Feng, CHEN An-Ping, JI Cheng-Jun, ZHU Biao, ZUO Wen-Yun, LI Xuan-Ran, SHEN Hai-Hua, WANG Zhi-Heng, TANG Yan-Hong2, FANG Jing-Yun   

  1. 1 Department of Ecology,College of Environmental Sicences,Center for Ecological Research & Education,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing 100871
    2 National Institute of Environment Studies , Tsukuba , Ibaraki , 3058506 Japan
  • Received:2003-06-12 Revised:2003-09-10 Online:2004-01-20 Published:2004-01-20
  • Contact: YANG Yuan-He

摘要: 在青藏高原进行了大范围的群落调查,研究高原的两种主要草地群落类型——高寒草甸和高寒草原的植物物种丰富度及其变化。结果表明: (1) 在50个样地250个1 m×1 m的样方中,共出现267种植物,其中高寒草甸179种,高寒草原135种。在高寒草甸,1 m2样方内物种数最多为32种,最少的仅为3种; 在高寒草原,物种数最多为18种/m2,最少的仅为2种/m2。(2)物种丰富度随经度和纬度的增加呈增加趋势; 随海拔的上升呈减少趋势。对物种丰富度与环境因子之间进行逐步回归,发现物种丰富度与生长季降水和温暖指数呈显著正相关。(3) 物种丰富度与地上生物量呈显著正相关。

Abstract: 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.