后河自然保护区常绿落叶阔叶混交林群落学特征研究

研究了后河国家级自然保护区常绿落叶阔叶混交林的区系特点、群落学特征。结果表明 :后河国家级自然保护区常绿落叶阔叶混交林群落物种丰富 ,有 110科 2 88属 5 34种 ,科的分布型以热带类型为主 ,属的分布型温带类型占优势 ,反映该群落区系以温带为主的亚热带区系特点 ;该混交林主要由以单叶、中型叶及非全缘叶为主的常绿、落叶阔叶高位芽植物组成 ,群落层次分明 ,从上至下 ,落叶阔叶树种所占比例逐渐减少 ,常绿阔叶树种比例逐渐增加 ;除两低海拔样地外 ,多样性变化幅度较小 ,各样地的物种多样性指数变化趋势基本一致。

Community Characteristic of the Mixed Eevergreen and Deciduous Broadleaved Forest in Houhe Nature Reserve

In this research, we studied the characteristics of the flora and community, and diversity of species in the mixed evergreen and deciduous broadleaved forest of Houhe Nature Reserve, Hubei Province. The forest consists of 110 families, 288 genera, and 534 species. The majority of the families are tropic types, in the degree of genera, temperate types are dominant, which reflects the characteristics of sub-tropic flora with the temperate types as the dominant types. Most of the plants in the forest are evergreen and deciduous broadleaved phanerophytes with simple leaf, mesophyll and non-entire leaf. The stratification of the vertical structure of the plant community is obvious. From the top to down, the proportion of deciduous broadleaved trees decreases gradually, while that of the evergreen broadleaved ones increases. The diversity indices are equal in different fields except two of the fields with low altitude.