杨树纯林和混交林节肢动物群落组成与群落时间动态分析

The analysis of arthropod community dynamics in pure and mixed forests of poplar

选取幼龄杨树纯林和混交林两种生境,研究其节肢动物群落组成和特征。结果表明,两种生境的节肢动物群落数量与丰富度差异明显,混交林丰富度高于纯林,但害虫个体数量少于纯林。节肢群落丰富度、多样性和均匀度指数各月份间的动态变化趋势一致,但混交林中群落均匀度、丰富度及多样性指数多数月份高于纯林。

Based on the survey of the arthropod communities in pure and mixed poplar forests, the composition and characteristics of the arthropod communities were analyzed. The result indicated that there were distinct differences in number and richness of arthropod communities between these two forests. The richness in the mixed forest was higher than that in the pure forest, but the pest individual number was less than that in the pure forest. The richness, diversity and evenness of arthropod communities between the two forests had the same change trends every month, but in most months the richness, diversity and evenness in the mixed forest were higher than those in the pure forest.