陆地生态系统中海拔高度的变化会导致植物群落的垂直性分布，这是形成植物多样性的一个重要性原因。了解和分析不同区域植物群落的垂直性分布规律和生物多样性形成机制对保护森林生物多样性具有重要意义。本文通过对猫儿山自然保护区不同海拔高度森林植物群落和环境因子的调查，运用双向指示种分析（Two-way Indicator-Species Analysis）和典范对应分析（Canonical Correspondence Analysis），对不同海拔高度的群落进行划分，对决定植物群落分布的主导环境因子进行分析，结果表明：（1）猫儿自然保护区森林群落可以分为7个群落类型，其代表树种分别是罗浮栲Castanopsis fabri、栲树Castanopsis fargeisii、银木荷Schima argentea、铁椎栲Castanopsis lamontii、南方铁杉Tsuga chinensis、长苞铁杉Tsuga longibracterata、马尾松Pinus massoniana；（2）在中亚热带，海拔对山地植物群落形成起决定性作用；（3）土壤是仅次于海拔的重要环境因子，其中土类和土层厚度对森林群落的影响较大。在中亚热带森林生态保护和恢复过程中，按照不同海拔高度的植物群落特征选择种植合适树种，按照当地土壤条件选择适当的生态保护和恢复措施能加快生态恢复的进程，提高生态保护的效益。%the change of altitude in terrestrial ecosystem leaded to the vertical distribution of plant communities. It was an important cause of plant diversity. Exploring the plant vertical distribution pattern and formation mechanism were critical to forest diversity protection. In this article, TWINSPAN (Two-way Indicator-Species Analysis) and CCA (Canonical Correspondence Analysis) were used to divide the woody plant communities and analyze the determinants. The results indicated: (1) the woody plants of Mao’er Mountain were divided into 7 communities. The dominant tree species of each community , in turn, were Castanopsis fabri, Castanopsis fargeisii, Schima argentea, Castanopsis lamontii, Tsuga chinensis, Tsuga longibracterata and Pinus massoniana; (2) altitude was the determinant factor of mountain plant community in middle subtropical zone; (3) soil factors, especially soil type and soil thickness, were the second important environment factors of plant community. In the protecting and restoring of mountain forest in middle subtropical zone, it was very important to select right tree species and restore measures according to plant vertical distribution pattern and formation mechanism. As a result, it would accelerate the restoring process and enhance the protective effect.
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