蜀柏毒蛾卵与初龄幼虫种群空间格局的研究

根据m—m、m—s~2、logs~2—logm的相关分析,认为蜀柏毒蛾两代卵和初龄幼虫种群在林间呈负二项分布。其格局的结构均是以个体群结构存在,个体群内个体间相互吸引,第1代卵和两代的初龄幼虫个体群呈聚集分布,而越冬代卵期种群的个体群呈随机分布。探讨了公共K值,分析了聚集因素。

Spatial Patterns of Populations of Parocneria orienta Eggs and Its First instar Larvae

From the correlated analysis of m-m, m-s~2and logs~2-logm it can be found that the populations of the two generations of eggs and first instar larvae of Parocneria orienta assume a negative binomial distribution in forest. All of their patterns are clustered structures with individuals. These individuals attract each other in an individual group. The individual groups of the first generation eggs and the two generations of first instar larvae are aggregated distribution, while the individual groups of populations in the wintering generation egg-laying are random distribution. This paper also has a discussion on k value and aggregation factors.