太白山牛皮桦林的定量研究

Quantitative Study on Betula albo sinensis var .septentrionalis Forest in Taibai Mountain

根据调查资料，分析了太白山牛皮桦林的种类组成、多样性、结构及演替趋势．依据聚类分析法和群落相似系数法将牛皮桦林分为４个类型．排序结果表明。

On the basis of investigation,the species composition,diversity,structure and succession tendency of Betula albo sinensis var. septentrionalis forest in Taibai Mountain is analysed.Four community types are classified by methods of cluster analysis and community similarity coefficients.Research on principal component analysis shows that the controlling factors of Betula albo sinensis var. septentrionalis forest are slope exposure and altitude.