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为了了解李园节肢动物群落的结构、特征,发挥生态系统中自然因素对害虫的生态调控作用,采用系统调查方法,在分析李园节肢动物群落结构和组织水平的基础上,对李园节肢动物群落的时间动态进行聚类分析,结果表明,对不同时期的总群落、亚群落进行模糊聚类得出结果,总群落的12次调查结果可以聚为5类,D =0 . 2 0 0 0 ,3、11、7和6月初各自归为一类,其余归为一类.天敌亚群落调查结果也聚为5类,D =0 . 2 0 0 0 ,3、7、8月各自归为一类,9月和10月归为一类,其余归为一类.非天敌亚群落调查结果同样聚为5类,D =0 . 10 0 0 ,4、7、6、11月各自归为一类,其余归为一类.聚类结果部分反映了群落状况的季节差异,聚类交替现象反映了群落结构复杂性.最优分割结果将总群落、各亚群落均分割为5个阶段,即4月6日为第一阶段,4月2 7日～6月8日为第二阶段,6月2 7日～8月2 7日为第三阶段,9月2 1日～10月19日为第四阶段,11月2 2日为第5阶段.反映了各阶段物种种类、数量等其他指标在发生时间上存在的差异.
In order to understand the structure and characteristics of the arthropod community in Liyuan Park and to make full use of the ecological regulation of the natural factors to the pests in the ecosystem, a systematic investigation method was used to analyze the community structure and organization level of the arthropod in the Liyuan Park, The results of cluster analysis showed that the results of cluster analysis of total communities and sub-communities in different periods showed that the results of the 12 surveys of the total communities could be clustered into 5 categories, D = 0.200 0 3, 7, 7 and 6 respectively, the rest were classified into one category and the results of the natural enemies sub-community survey also clustered into five categories, D = 0.200, 3.7, One in September, one in September and one in October, and the rest in one category. The results of the survey on non-natural sub-communities also clustered into five categories, with D = 0.1000, 4.7, 6.1, And the rest are classified into one category.Results of the clustering partially reflect the seasonal differences of community status.The clustering alternation phenomenon reflects the complexity of the community structure.The optimal segmentation result divides the total community and sub-communities into five stages, Ie April 6 is the first phase, April 27 to June 8 is the second phase, June 27 to August 27 is the third phase, 9 From January 21 to October 19 for the fourth phase and November 22 for the fifth phase, it reflects the differences in the occurrence time of other species such as species and quantity at each stage.