| 祁连山区不同海拔草地群落的物种多样性 |
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| 引用本文： | 常学向,赵文智,赵爱芬.祁连山区不同海拔草地群落的物种多样性[J].应用生态学报,2004,15(9):1599-1603. |
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| 作者姓名： | 常学向 赵文智 赵爱芬 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,兰州,730000
2. 中国科学院寒区旱区环境与工程研究所,兰州,730000;烟台师范学院生物系,烟台,264025 |
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| 基金项目： | 中国科学院知识创新工程项目 (KZCX3 SW 3 2 9)，国家重点基础研究发展规划资助项目 (G2 0 0 0 0 4870 5 ) |
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| 摘 要： | 依据植物在各海拔带出现的频率和不同海拔带植物种的生活型，对祁连山区草地群落海拔2500～3000m的物种α多样性变化特征进行了研究．结果表明，随海拔升高，Shahnon-Wiener指数从1．432上升到1．832，Simpson指数的变化较为复杂．海拔2701～2800m带是物种多样性的一个重要转折点，是物种多样性较丰富的地带．在祁连山草地群落中，有毒的与食性较差的物种在各海拔带所占比例均超过50％，生物量占到整个样地生物量的60％以上，物种多样性已呈现衰退．
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| 关 键 词： | 物种多样性 物种多样性指数 物种丰富度 海拔带 祁连山区 |
| 文章编号： | 1001-9332(2004)09-1599-05 |
| 修稿时间： | 2003年11月4日 |
Species diversity of pasture community at different altitude levels in Qilian Mountains |
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| CHANG Xuexiang ,ZHAO Wenzhi ,ZHAO Aifen.Species diversity of pasture community at different altitude levels in Qilian Mountains[J].Chinese Journal of Applied Ecology,2004,15(9):1599-1603. |
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| Authors: | CHANG Xuexiang ZHAO Wenzhi ZHAO Aifen |
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| Affiliation: | Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China. chxx@ns.lzb.ac.cn |
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| Abstract: | 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. |
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| Keywords: | Species diversity Biodiversity index Species richness Altitude level Qilian Mountains |
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