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作 者 ：苗莉云  王孝安  王志高

期 刊 ：西北植物学报 2004年 10期

关键词：太白红杉群落；物种多样性；环境因子；

Keywords:Larix chinensis communities, species diversity, environmental factor,

摘 要 ：定量研究了太白红杉群落物种多样性与环境因子的关系,结果表明:(1)海拔与物种丰富度和种间相遇机率呈极显著的负相关;与Shannon指数、Simpson指数和Pielou指数表现为"中间高度膨胀"的规律,即中等海拔高度上多样性高而低海拔和高海拔多样性较低。(2)岩石裸露度与物种丰富度呈显著的负相关。(3)土壤含水量与物种丰富度呈极显著的正相关;与种间相遇机率呈先降后升的趋势。(4)环境因子与物种多样性逐步回归结果是:海拔和岩石裸露度与物种丰富度关系密切,其回归方程为:S=90.62-0.02E-14.14B(r=0.769,P<0.05)。

Abstract:The relationships between species diversity indices of Larix chinensis communities and environmental factors were studied quantitatively in this paper. The results were as follows:(1) The species richness and PIE of the communities were negatively relat

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