Abstract: This paper analysed the species richness,species diversity index and community evenness in different plots and layers of Castanopsis eyrei community in the Tiantai Mountain of Zhejiang Province. The species richness and species diversity index of woody plants two communities. In terms of community vertical structure,the species richness and species diversity index of the second sublayer of tree layer are gibber than those of the first sublayer between community evenness of these two communities.The speices richness and diversity index of shrub layer are the biggest,while those of tree layer and herb layer are the second and the smallest respectively.The community evenness of sharub layer is obviously bigger than that of tree layer while it is not very different from those between herb layer and tree layer and shrub layer.The diversity indexes of tree layer,shrub layer or herb layer among various plots are somewhat different.Relatively,the differences of shrub layer or tree layer are small while differences of the herb layer are commparatively big.

Key words: Tiantai Mountain, Castanopsis eyrei community, SPecies diversity

摘要： 对浙江省天台山甜槠群落的不同样地、不同层次的物种丰富度、物种多样性指数和群落均匀度进行了分析。结果表明：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，而群落均匀度两者无显著差异。在群落垂直结构中，乔木层第二亚层的物种丰富度、物种多样性指数均显著大于第一亚层，它们之间的群落均匀度差异不显著。灌木层的物种丰富度、多样性指数最大，乔木层次之，草本层最小。灌木层的群落均匀度明显大于乔木层，而乔木层、灌木层的群落均匀度与草本层差异不显著。乔木层、灌木层、草本层的多样性各项指标在群落各样地间均有一定的差异，相对而言，灌木层、乔木层的差异较小，草本层的差异较大。

关键词: 天台山, 甜槠群落, 物种多样性