南岳森林群落生物多样性研究(Ⅲ)广济寺森林群落植物物种相对多度分布格局

STUDY ON BIODIVERSITY OF FOREST COMMUNITY IN NANYUE OF HUNAN PROVINCE (Ⅲ)--MODEL ON DISTRIBUTION PATTERN OF PLANT SPECIES RELATIVE ABUNDANCE IN GUANGJI TEMPLE

本文选用几何级数分布、分割线段、对数级数分布和对数正态分布等模型研究了南岳广济寺森林群落植物物种相对多度的分布格局。结果表明,对数级分布模型适于拟合南岳广济寺森林群落乔木层和灌木层物种相对多度的分布格局;分割线段中的序列一多度模型仅适合于乔木层;对数正态分布模型仅适合于草本层;几何级数分布模型完全适合于拟合任何层次。此外,α指数值亦显示出本群落接近山地季雨林的多样性水平。

This paper chooses four models of distribution pattern of species relative abundance i. e. Geometric series distribution, Broken stick, Log series distribution and Log normal distribution,that they have been used to study the distribution pattern of species relative abundance of forest community in Guangji Temple of Nanyue. The results show that Log series distribution model is suitable for imitating the distribution pattern of the plant species relative abundance of the arbor layer and shrub layer of forest community in Guangji Temple of Nanyue,but Rank -Abundance model of Borken stick is only suitable for imitating the arbor layer,and Log normal distribution model is only suitable for imitating the herb layer,and Geometric series distribution model isn't suitable for imitating any layer of the distributional pattern of the plant sp ecies relative abundance of forest community of Nanyue. Besides,the value of a - index of this community approaches the diversity level of the Maintainous Seasonal Rain Forest.