乳源木莲天然林群落结构特征研究

Research on the Structure Characteristics of Manglietia yuyuanensis Natural Forest Community

本文利用Simpson指数、Shannon-wiener指数、种间均匀度指数及Margalef指数作多样性指标,运用扩散系数、扩散指标等聚集度指标对乳源木莲种群的空间分布格局进行了研究。同时,对该种群分布格局的动态规律及趋势进行了探讨。结果表明:乳源木莲天然林群落物种比较丰富,群落处在以乳源木莲、拉氏栲等为优势种的进展演替中,群落的主要建群种乳源木莲在空间上属聚集分布(此分布型将在相当长的时间内保持相对稳定状态),乳源木莲正处于成熟种群,可作为天然林更新的主要保护树种。

By using the diversity indexes such as Simpson index, Shannon- wiener index, interspecies regularity index and Margale index, with the concentration indexes including coefficient of diffusion and diffusion index, it conducted the research on the space distribution to the Manglietia yuyuanensis. At the same time, the paper also discuss on the dynamic distribution layout role and trend of this species group. The result shows that nature forest community of Manglietia yuyuanensis are rich in the species, and the community is under the succession process taking the Manglietia yuyuanensis and Castanopsis lamontii as the prevalent species. As the main constructive species of the community, Manglietia yuyuanensis are distributed assembly on the space （such distribution will be kept in a relative stable status for a long time）. Therefore, Manglietia yuyuanensis may be used as the main soil protection tree species in the regeneration of the nature forest since that they belong to the matured species group.