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应用群落物种多度分布模型:对数级数分布模型、对数正态分布模型、几何级数分布模型和分割线段分布模型研究了森林草原交错带土壤节肢动物群落的种-多度分布关系。结果表明:对数级数分布模型和对数正态分布模型能够较好的拟合交错带大型土壤节肢动物群落的种-多度分布,中小型土壤节肢动物仅能用对数级数分布模型来拟合;几何级数分布模型和分割线段分布模型则不适于描述该区土壤节肢动物群落物种多样性。对数级数分布的参数α和对数正态分布的参数λ是反映群落结构特征内在性质的量,可以作为物种多样性指数运用,能较好地反映群落的物种丰富度。研究结果可为交错区群落物种多样性保护提供理论基础。
The species-abundance distribution of soil arthropod communities in the ecotone of forest steppe was studied by using the species abundance distribution model of logarithm, logarithmic distribution model, logarithmic normal distribution model, geometric series distribution model and segmentation line segment distribution model. The results showed that the logarithmic series distribution model and the lognormal distribution model fit the species-abundance distribution of large-scale soil arthropod community in the interlaced zone. The distribution of small-medium-sized soil arthropods can only be described by logarithmic series The geometric series distribution model and the segmentation line segment distribution model are not suitable for describing the species diversity of soil arthropod community in this area. The logarithm of the logarithmic distribution α and the logarithm of the logarithmic normal distribution λ are the quantities that reflect the intrinsic properties of the community structure characteristics and can be used as the index of species diversity to better reflect the species richness of the community. The results provide the theoretical basis for species diversity protection in the ecotones.