摘要
本文选择了西双版纳地区６个傣族“龙山”片断热带雨林和一个同样植被类型的自然保护区原始林为研究样地，在各样地中均设置一个２５００ｍ２面积的样方，采用植物群落学与植物种类编目相结合的方法，比较研究了各“龙山”片断雨林的群落结构（层次和覆盖度），植物丰富度（单位面积上的植物个体数）和物种多样性指数的变化情况，得出结论：随着隔离（孤立）时间的增加和人为干扰的加剧，“龙山”片断热带雨林的群落结构和植物丰富度将越趋偏离原始热带雨林，亦即群落结构变得不完整，植物丰富度降低，以及物种多样性指数显著下降，片断热带雨林中的雨林成分也将在一定程度上被先锋成分等其它植被类型成分替换。本文也对导致这些变化的原因作了探讨。
Six fragmentary tropical rain forests on Dai's Holly Hills and one primary rain forest in Nature Reserve were chosen for the research of the changing of plant diversity. Sample plots of2 500 m 2 were set for each site. In the plots, plants were inventarized; community profile, coverage and the number of individual of each layer and the patterns of tree species etc. were measured and recorded. The index of plant diversity (Shanon index) were counted. Comparison between the fragmentary rain forests on Dai's Holly Hills and the primary rain forest in Nature Reserve was also done. The possible causes and procedures of the changing of plant diversity of the fragmentary rain forests were analysed. It was concluded that with increasing of isolated age and disturbance of human being to the fragmentary rain forests, the community profile will become incomplete, and the abundance of plants and index of plant diversity will become lower, which will directly lead to the loss of stability and diversity of the forests. Furthermore, the species of rain forest will gradually replace by pioneers and some other species from mountain evergreen broad-leaved forests and monsoon forests.
出处
《广西植物》
CAS
CSCD
北大核心
1997年第3期213-219,共7页
Guihaia
基金
中国科学院"KJ85-05"重大项目
95重大项目
关键词
西双版纳
热带雨林
植物多样性
龙山片断雨林
Xishuangbanna
fragmentary tropical rain forest
changing of plant diversity
