南平部分森林群落物种多样性分析

On Species Diversity of Some Forest Communities in Nanping Region

本文根据南平部分森林群落样地的数据研究了群落物种的多样性．用Ｓｉｍｐｓｏｎ指数、Ｓｈａｎｎｏｎ－Ｗｉｅｎｅｒ指数、种间相遇机率（ＰＩＥ）和Ｓｈａｎｎｏｎ－Ｗｉｅｎｅｒ均匀度作为多样性测定指标．测定结果表明，在同一纬度带内，具有越接近群落的顶极阶段，其物种多样性越高的趋势；同一群落类型的样地，具有随海拔高度的增加，群落物种多样性呈减少的趋势；从群落结构组成上看，乔木层的物种多样性低于下木层，体现群落向区域顶极阶段演替．认为物种多样性测定与比较，说明群落的结构、类型、生境和演替等方面很有价值．

By using Simpson index, Shannon-Wiener index, PIE and Shannon-Wiener evenness index, this paper calculated the species diversity of some forest communities based on the data from vegetation investigation in Nanping region. The results revealed that the species diversity of community had increasing tendency with the progression of communities succession in the same latitude zone, but the species diversity of community had decreasing tendency with elevation rising in the same forest community type, The species diversity of tree strata was higher than that of undergrowth layers within any forest community, all these information could indicate the regional community succession stage. It was rather useful for analysing the forest community structure, type, habitat and succession etc.