板栗树冠节肢动物群落季节动态研究

分别分析了群落总体及其亚群落数量季节动态以及群落结构特征的季节动态，共采集节肢动物136种，隶属于12个目、63个科。群落害虫优势类群为同翅目、鞘翅目和鳞翅目，天敌优势类群以蜘蛛目为主。节肢动物群落个体总数量两个高峰期分别出现在4月下旬和9月中旬，整个节肢动物群落的数量变化主要由同翅目特别是该目中蚜虫的数量变化而引起。害虫亚群落的个体数量变化左右了整个群落的数量变化，总群落的物种丰富度、多样性指数和均匀度指数与害虫亚群落的变化趋势较为一致。

Research on the Seasonal Dynamics of Arthropod Community on Chestnut Canopy

The quantitative seasonal dynamics of total community,sub-community and the community structural characteristics were analyzed.136 species of arthropods were obtained,which belonged to 12 orders,63 families.Homoptera,Coleoptera and Lepidoptera were the dominant species.Araneae was the dominant species of natural enemies.Variation curve of community individual numbers was two-peak pattern.Two peaks appeared in late April and middle September.So was the variation curve of Homoptera.Individual numbers variation of the community was decided by that of the pest sub-community.Diversification of species richness,diversity and evenness indexes of total community were consistent with that of pest sub-community.