1. According to the distribution of species and amount, the author makes a PCA analysis to the different habitats. The analysis of hierarchical cluster to different habitat is according to the distribution of species. According to the results of the two ways of analysis and the factual condition of environment, the environment of Daqinggou is divided into 3 types of habitat that are described as the hygric plant community in the bottom of ditch, xerophytic plant community in the top of ditch and single type plant community.
    以直翅目昆虫种类和数量的分布为属性对不同生境作PCA分析并以直翅目昆虫种类分布为属性作等级聚类分析，两种分析方法所得结果十分相似，结合分析结果和实际情况将大青沟7种不同生境分为3类，分别命名为沟底湿生植物群落，包括水曲柳植物群落、湖边湿地植物群落和稻田植物群落；沟上干早植物群落，包括沙丘草地和大果榆植物群落；单一型植物群落，包括人工针叶林植物群落和蒙古栋植物群落。