太白山针叶林的物种多样性

Species diversity of coniferous forest in Taibai mountain

应用Ｓｈａｎｎｏｎ－Ｗｉｅｎｅｒ指数、Ｓｉｍｐｓｏｎ指数和种间相遇机率（Ｐ）研究了太白山针叶林植物物种多样性．结果表明：影响太白山针叶林植物物种多样性的因素首先是群落过渡区的边缘效应，其次是群落分布海拔的影响．而物种多样性的高低并不一定直接决定群落的稳定性，群落的稳定性是群落长期适应自然环境的产物．

The species diversity of the coniferous forest in Taibai mountain is studied with Shannon Wiener index,Simpson index and probability of interspecific encounter( P ),The results show that the factors affecting the species diversity of the coniferous forest in Taibai mountain,is the edge effect ot the community transition region and the elevation of the community distribution,the big or small of the species diversity uncertainly decide the community stability.The community stability is the result of the community adapting to the natural environment over a long period of time.