缙云山森林次生演替序列群落的物种多样性动态

Dynamics of species diversity in secondary succession series of forest communities in Jinyun Mt.

通过１９８６ 和１９９６ 年对缙云山森林次生演替系列群落的重复调查，运用构成指数对这些群落进行演替排序，研究缙云山森林次生演替过程中的物种多样性动态．结果表明，构成指数（ ＣＩ） 可适当改变空间代替时间的局限；在缙云山森林次生演替过程中，物种丰富度呈先变大后变小的趋势，物种均匀度没有明显的动态规律，这与种间（ 内） 关系密切相关。

Based on the investigations on the secondary succession series of forest communities in Jinyun Mt. in 1986 and 1996, the composition index (CI) was used to process the ordination of community succession, and to study the dynamics of species diversity. The result shows that CI would solve the problem resulted from the substitution of time with space. In the course of forest secondary succession, the species richness tended to increase at the early stage, and then to reduce; while the species evenness did not show any obvious dynamics, which was related to the intraspecific and interspecific relations. Therefore, moderate disturbance could increase species diversity in communities.