浙江天台山七子花群落种群分布格局研究

Studies on distributive pattern of Heptacodium miconioides population in Tiantai Mountain in Zhejiang province

以浙江省天台山七子花群落为研究对象，采用相邻格子样方法取样数据，应用方差／均值比的t检验法、负二项参数、扩散型指数、Cassie指标、丛生指标、平均拥挤指数和聚块性指数等方法，分析了七子花群落各优势种群以及七子花种群在各样地中的分布格局，并分立木级对七子花种群在不同样地内的集群强度进行了测定。结果是：群落中各优势种群均呈集群分布；七子花种群在各样地亦呈集群分布，但集群强度有差异；各样地中七子花种群小树的集群强度均大于中树，种群呈扩散趋势。

The contiguous grid quadrats have been applied to sampling for field data. And such methods V/m ratio t-test, negative binomial parameter, index of dispersion, Cassie index, index of clumping, index of mean crowing and index of patchiness are employed to analyse various dominant populations of Heptacodium miconioides community in the Tiantai Mountain in Zhejiang province and distributive patterns of Heptacodium miconioides community in different quadrats, and this paper also examines the intensity of Heptacodium miconioides population in different quadrats by means of stand classes. The results show that the different dominant populations of the community and the distributive Patterns of Heptacodium miconioides community in different quadrats are clumpy distributed, but they are different in terms of intensity. The intensity of young trees is bigger than that of medium-sized trees and the population tends to be diffusion.