Studies of dominant population structure and interspecific association of the evergreen broad-leaved forest in Tiantai Mountain

The dominant population structure and developments of the evergreen broad leaved forest community in Tiantai Mountain of Zhejiang Province were analyzed by the method of spatial sere substituting for time sere. The results are as follows: the survival curves of Castanopsis eyrei, Schima superba and Lithocarpus harlandii population are obviously linear; the age structure of the population is stable or increasing; the age structure of Pinus massoniana and Quercus glandulifera var. brevipetiolata is declining; the age structure of Cyclobalanopsis gracilis is moving from being stable to being declining. The overall relatedness and interspecific association of the main 22 shrub layer species and 20 tree layer species of the evergreen broad leaved forest were examined by using variance ratio (VR) and X 2 test by 2×2 contingency table.The results show that the interspecific association of the tree layer or the shrub layer species are, on the whole, positive, and there are more paired species of positive association than those of negative association.