摘要
采用扩散型指数法、回归模型分析法、ＦｕｚｚｙＩＳＯＤＡＴＡ聚类分析和二维趋势面分析等方法，对油松毛虫幼虫种群中间格局的动态进行了分析。结果表明：自越冬幼虫上树后直至化蛹期间的中间格局皆属聚集型，种群聚集度系逆密度制约的，表现在时间序列上的总趋势是离心运动（扩散）；幼虫种群空间动态系统可划分为４个阶段（亚系统），与之相对应的种群生物学阶段，分别是越冬幼虫刚刚完成上树期、幼虫稳定取食为害期、迁移扩散期和蛹期；ｍ＊（Ｔ，ｍ）关系的二维趋势面方程对种群空间动态作出了客观的描述。此外，文中应时ｌｗａｏ的准则作了必要的补充，使之更趋完善。
The larvae population space pattern of Dendrolimus tabulaeformis was studiedwith diffusivity exponent analysis,regression analysis,Fuzzy ISODATA cluster analysisand bivariate tendency surface analysis.The results show that the space pattern during theperiod from climbing up trees of the hibernate larvae to pupating belongs to crowding pat-tern.The population crowding level was restricted by the contrary density,and in time or-der it has the tendency of centrifugal movement.The dynamic system of larvae populationspace pattern could divide into four stages,and their corresponding biological stages of thepopulation correspond are climbing up tree stage of the hibernate larvac,insistently feedingand harming stage,migration diffusion stage and pupation stage.The population space dy-namic was described objectively by bivariate tendency surface equation of m*(T,M)relation.Moreover,Iwao criterion was improved essentially in this paper and made moreperfect.
关键词
趋势面分析
空间动态
油松毛虫
Fuzzy ISODATA analysis
tendency surface analysis
space dynamic
Dendrolimus tabulaeformis, Iwao crierion
