摘要
本文运用聚集度指数(C、Iδ、m*和m*/m)、Twao的m*-m回归分析方法,测定了青海土蝗的空间格局。结果表明,青海土蝗呈随机分布。分布的基本成分是个体群(α>0),个体群的分布是随机的(β=1)。根据空间分布信息,运用Iwao的序贯抽样技术。
A certain pattern of an insect, the Qinghai native grasshopper was determined by applying the indices of patchiness (C、I δ、m[DD(-*4]* and m*/m) and Iwao′s m*-m regression analysis method. The result showed here that this spacial pattern belongs to Poisson distribution theoretically, the basic composition of distributive pattern is an individual association with α>0, i.e., the Poisson distribution with β≈1. Sequential sampling table was thus given on the basis of Iwao′s model together with its spacial pattern parameters.
出处
《四川草原》
1997年第2期42-45,共4页
Journal of Sichuan Grassland
关键词
青海土蝗
土蝗
空间分布型
抽样技术
草原
Qinghai native grasshopper species, spacial pattern, sampling technique