COMMUNITY STRUCTURE AND TREE SPECIES DIVERSITY CHARACTERISTICS IN A TROPICAL M ONTANE RAIN FOREST IN BAWANGLING NATURE RESERVE, HAINAN ISLAND
海南岛霸王岭热带山地雨林群落结构及树种多样性特征的研究

The species composition, height, diameter class structure and tree species diversity were examined in a 1 hm 2 plot in old growth tropical montane rain forest in Bawangling Nature Reserve of Hainan Island. The tree species richness and diversity indexes were high relative to forests in mainland China. Both the numbers of tree species and tree density decreased as height class or diameter class increased, fitting both negative exponential and negative power equations. There was a significant positive correlation between tree species abundance and tree density for trees of different height classes, different diameter classes and for trees in different quadrats in the tropical montane rain forest. At successional maturity, only a small number of species with a small proportion of individuals could reach the canopy layer in the old growth community.