云南不同海拔花椒园昆虫群落结构及动态

调查了4种不同海拔花椒园昆虫群落组成及结构的周年变化，应用群落特征参数及主分量分析方法分析了昆虫群落特征及其在时间过程中的主导因素和时间格局.结果表明，随着海拔的逐渐上升，昆虫群落中种类数量逐渐减少，种群数量相对增加，群落多样性、丰富度及均匀度等指数逐渐下降，随时间的变化而波动的趋势逐渐明显，主导昆虫群落变化的最主要因子由天敌亚群落的物种数和个体数量综合因子逐渐转向害虫亚群落的物种数和个体数量综合因子.

Insect community structure and its dynamics in Chinese prickly ash plantations at different altitudes in Yunnan Province

With community character indices and principal component analysis, this paper studied the variation of insect community composition and structure in Chinese prickly ash plantations at four altitudes in Yunnan Province, and analyzed the temporal patterns of the variation and its affecting factors. The results showed that with the increase of altitude, the species diversity, abundance and evenness of the community decreased gradually, while the population number had a certain increase. Such a variation was more obvious with time. The factor dominating the variation was the gradual change of the species and individuals numbers of natural enemy sub-community to those of pest sub-community.