江西三清山浙江楠种群结构与分布格局分析

Analysis of Population structure and Spatial Distribution Pattern of Phoebe chekiangensis in Sanqingshan Mountain of Jiangxi Province

以江西三清山浙江楠群落为调查对象,在野外样方调查获取资料基础上,对浙江楠种群径级、高度级、种群动态和种群分布格局进行分析.结果表明:浙江楠种群径级结构呈橄榄型;高度级结构呈金字塔型和年龄结构呈橄榄型,幼苗严重不足,具有逐步衰退的趋势;种群更新主要靠种子繁殖;种群的空间分布格局呈聚群分布;分布格局动态由幼苗、幼树的聚群分布向中树、大树的随机分布的扩散趋势.

Phoebe chekiangensis,an endemic species in China,is one of the Chinese national second protective wild plants. Based on the community survey and field data obtained in the plot,diameter class,height class,dynamics and distribution pattern of Phoebe chekiangensis population were analyzed in Sanqingshan Mountain of Jiangxi Province. The results show that the diameter structure of the population was spindle-shaped,the height structure were a pyramid-shaped and age structure were a spindle-shaped,the population of Phoebe chekiangensis was declining due to lack of seedlings. The regeneration plant was the main seed. The distribution patterns of the population were clumped on the stages seedling and sapling trees. they were the random distribution on the stages of middle and large trees.