Dynamic characteristics of the dominant populations in different succession stages of evergreen broad-leaved forest on Tiantai Mountain in Zhejiang Province

Using the size class instead of age structure , the density dynamic and the distribution patterns of the dominant populations were studied , which were in the secondary sere community of evergreen broad-leaved forests on Tiantai Mountain in Zhejiang Province .The results showed that in the processes of succession from needle leaved forest to evergreen broad-leaved forest , the density of Pinus massoniana populations reduced gradually and the age structure of the populations was all decline pattern .The density sequences of Schima superba population in three communities were needle broad leaved mixed forest , needle leaved forest and evergreen broad-leaved forest .The age structure of the populations was all growing pattern .The Castanopsis eyrei population only appeared in needle broad leaved mixed forest and evergreen broad-leaved forest .The population density in needle broad leaved mixed forest was relatively greater and the age structure of the population was growing pattern , while the age structure of the population in evergreen broad-leayed forest was stable pattern .The distribution patterns of the populations changed with development of forest succession .The declined population was mostly randormly or uniformly distributed while the growing population or stable population was laryely aggregated distributed .[ Ch , 2 tab .10 ref .]