南亚热带演替群落的边缘效应及其对森林片断化恢复的意义

通过对鼎湖山两个群落及其边缘群落的长期定位研究，探讨南亚热带演替群落的边缘效应与森林片断化恢复，通过１６ａ的定位研究，从测度群落的物种结构，多样性，生物量与生产力等指标的比较表明，马尾松林群落和混交林群落本身经过１６ａ的演变，虽然有所发展，但变化不大，群落性质没有改变；边缘群落原非常接近马尾松林群落，经过６ａ的演变，已经发展成为混交林群落，说明边缘效应的作用。边缘群落总体的边缘效应强度Ｅ值为１．６

Studies on edge effect of successional communities and restoration of forest fragmentation in low sub-tropics

The dynamics of the ecotone of Pinus forest community and mixed forest community was studied with 16 years' permanent quadrat analysis and with comparing it to its adjacent communities. Species richness, diversity, organization level, leaf area index, biomass and productivity as well as comparative ordination and cluster techniques were used to analyze edge effect. The results showed that ecotonal community had developed into mixed forest, and it was near pine forest in the characteristics in 16 years ago. Its adjacent communities, pine forest and mixed forest had been their base states with some change in 16 years. The edge had moved over 100 m into pine forest. Time of edge affection lasted about 20 years in this type. The direction of edge effect was same as succession, and it speed up succession in ecotonal community more. It's a vary good case that edge effect is usefull for patch elimination after fragmentation.