摘要
利用Shannon-Wiener指数、物种均匀度、物种丰富度、生态优势度及物种多度分布研究了广东英德石门台自然保护区山顶矮林的物种多样性。结果表明:山顶矮林乔木层、灌木层、草本层和藤本植物的Shannon-Wiener指数的变化范围分别为1.213～3.338、1.116～2.843、0.291～2.278和0.101～1.951;物种均匀度,表现为乔木层>灌木层>藤本植物>草本层。按垂直结构层次的生态优势度顺序为草本层>藤本植物>灌木层>乔木层。各样地乔木第一亚层的多样性指数、物种数和株数均低于第二亚层。山顶矮林的乔木层、灌木层、草本层和藤本植物的多度分布都适合于对数级数分布,说明山顶矮林富集种少、稀疏种多。
Species diversity of forest communities of the montane elfin forest was studied by using the method of Shanˉnon-Wiener Index,species evenness,abundance,ecological dominance,the distribution of species-abundance in Shimentai Nature Reserve,Yinde of Guangdong.The results showed as following:Shannon-Wiener index of arborous layer ranged from1.213to3.338,shrub layer ranged from1.116to2.843,herbaceous layer from0.291to2.278,liane from0.101to1.951.The vertical structure of species evenness was arborous layer>shrub layer>herbaceous layer>liane>herbaceous layer,ecological dominance was herbaceous layer>liane>shrub layer>arborous layer.Shinnon-Wiener index,species and individual plant number of the first tree sublayer are lower than the second tree sublayer.Discussion on the distribution of species-abundance showed that the community included fewer dense species but more sparse species,the four layers all obeyed a logarithmic series distribution.
出处
《茂名学院学报》
2004年第1期25-29,共5页
Journal of Maoming College
