西双版纳望天树林的群落组成和结构特征研究  

A Study on Composition and Structure of Parashorea chinensis Community in Xishuangbanna

作　　者：汤明华 

机构地区：[1]云南省林业生态工程规划院,云南昆明650031

出　　处：《西部林业科学》2007年第2期26-32,共7页Journal of West China Forestry Science

摘　　要：利用1992～1993年在西双版纳自然保护区的勐腊县补蚌片区建立的5块望天树林固定样地的观测资料，从物种组成、科属区系特征、水平布局和垂直布局方面对该群落的组成和结构特征进行了研究，采用仅多样性指数及联合熵H（X，Y）分析了望天树林群落结构的多样性；采用p多样性指数比较了样地间的多样性。结果表明：西双版纳望天树林物种相当丰富，在5块50m×50m的固定样地内计有种子植物68科176属380种。该群落中热带科有57科，占89．1％，热带属有163属，占92．6％，反映出其强烈的热带性质。根据树高的分布情况，将该群落的地上垂直结构分为5层，即计有乔木3层，灌木层和草本层。而对群落内物种的水平分布格局所进行的检测结果显示，所选择的3个主要树种（望天树、木奶果、假海桐）在5块固定样地内均为典型的集群分布。联合熵分析表明，其群落结构的多样性指数为15．8008～21．0053。Using the observation data of five fixed sample plots in Bubeng of Xishuangbanna Nature Reserve, the composition and structure of Parashorea chinensis community were studied from composition of species, characteristics of family and genus, horizontal and vertical distribution. The community diversity was analyzed by using α diversity index and H （X, Y）, the diversities of different sampling plots were compared. The results indicates that the species in Parashorea chinensis community is very rich, there are 68 families, 176 genera and 380 species of seed plant in five study plots. Among which, 57 families and 163 genera belong to tropical climate zone. The aboveground part of the community can be divided into five layers, namely three arborous layers, shrub layer and herbaceous layer. The study results also indicate that three main species namely Parashorea chinensis, Baccaura ramiflora and Pittosporopsis kerrii show the characteristics of clumped distribution. The results of H （X, Y） analysis show that the biodiversity index of Parashorea chinensis in study area is 15. 800 8 to 21. 005 3.

关 键 词：西双版纳 望天树林 群落组成 群落结构特征 

分 类 号：S718.54[农业科学—林学]