基于模糊聚类法的亚洲小车蝗种群空间格局分析  

Analysis on the population spatial distribution of Oedaleus decorus asiaticus by fuzzy cluster method

作　　者：胡靖[1] 张廷伟[2] 刘长仲[2] 韩天虎 代健聪 陈威[2] 王小强[2] 

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]甘肃农业大学草业学院,甘肃兰州730070 [3]甘肃省草原技术推广总站,甘肃兰州730010 [4]甘肃省肃南县草原站,甘肃张掖734400

出　　处：《甘肃农业大学学报》2012年第3期62-66,共5页Journal of Gansu Agricultural University

基　　金：公益性行业(农业)科研专项(201003079);甘肃省农牧厅"肃南县草原蝗虫综合治理技术研究"项目

摘　　要：根据平均拥挤度、聚块性指标、Morisita扩散型指数、聚集指标和扩散系数5项聚集度指标,分析了肃南县高山草原亚洲小车蝗种群的空间分布,并运用模糊聚类法对其空间格局进行了研究.结果表明:亚洲小车蝗种群的发生初期和末期为2个特殊发育阶段,空间格局表现为聚集分布,高龄蝗蝻和成虫混合发生期为均匀分布,在蝗蝻出土和交配产卵过程中表现为聚集分布.The spatial distribution of surveyed and analyzed with five indexes Oedaleus decorus asiaticus in Sunan high mountion grassland was of aggregation, which include crowded index, diffused coefficient, diffused index, swarm index and Kuno index. Fuzzy clustering method was carried out with the data of mean densities, indexes of aggregation and occupied plot rates. The results showed that the population spa- tial distribution of this grasshopper could be divided into two types. The initial stage of hatching and the last stage of adult were the particular stages, the spatial distribution of the two stages belonged to an ag- gregative distribution. In the mixed occurring stage of nymph of three to five instars and the stage of adult, the population distribution was uniform. In the course of hatching and spawning, the population showed an aggregated distribution.

关 键 词：亚洲小车蝗 空间格局 聚集度指标 模糊聚类分析 

分 类 号：Q968[生物学—昆虫学]