浙江仙居俞坑森林群落物种多样性研究

分别采用物种丰富度、物种多样性指数和群落均匀度指标对浙江省仙居县俞坑森林群落的物种多样性进行测定和分析。结果表明：本木植物的物种多样性以生境优越的常绿阔叶林为高，木本植物的物种丰富度、物种多样性指数明显大于草本植物。在群落垂直结构中，木本植物等2层的物种丰富度、物种多样性指数均显著大于第1层。物种丰富度以木本第3层最大，草本层最小；而物种多样性指数、群落均匀度则以木本第2层最大、草本层最小。木本植物各层次、草本层的物种多样性各项指标在群落各样地间均有一定的差异。

Species Diversity of Yukeng Forest Communities in Xianju of Zhejiang

Species diversity of the Yukeng forest communities in Xianju County of Zhejiang Province was determined and analyzed by using the index of species richness, species diversity and community evenness. The results are given below. The communities are mainly composed of evergreen tree species under favorable conditions. The species richness and species diversity index of the woody plants are obviously greater than those of the herbs. In terms of the community's vertical structure, the species richness and species diversity index of the second layer of the woody plants are much greater than those of the first layer. The third layer of the woody plants is the greatest in relation to species richness while the herb layer is the smallest. If the species diversity index and community evenness are concerned,the second layer of woody plants is the greatest while the herb layer the smallest. The diversity indices of various la yers of the woody plants and the herb layer are to a certain degree different among the plots.