SUCCESSIONAL TREND OF DISTRIBUTIONAL PATTERN FOR POPULATION IN DALAO RIDGE,YICHANG, HUBEI PROVINCE

Several measures, which included variance/mean ratio, Lloyd test,and Morisita, M test,were used to analyze the trend of pattern over successional pathway at Dalao Ridge,Yichang, western Hubei Province.Results showed that population rarely distributed in poisson pattern at real communities,instead it was commonly from contagious to even pattern as communities developed.After then, pioneer species disappeared,while climax species cycled from contagious to even pattern and kept stable self-regeneration.