By using the methods of typical quadrat,the structure characteristics and distribution pattern of Castanopsis eyrei populations of secondary forest through age stucture,lifetable characteristics,survival curves and 4 aggregation intensity index (distribution coefficient R,negative binomial parameter K,mean crowding index M*and accumulation index PAI)were studied in the National Forest Park of Yangmings-han,Hunan.The results showed that:1 )the age structure of the C.eyrei population of the Yangmingshan followed a spindle shape,which indicat...