Dynamics of community structure in successional process of needle and broad-leaved mixed forest in Heishiding of Guangdong Analysis of environmental factors affecting the distribution of epiphytic bryophyte at Heishiding Nature Reserve, Guangdong Province Bryophyte Communities in the Forest of Heishiding Nature Reserve, Guangdong, China CALORIC VALUES OF ABOVEGROUND ORGANS IN EVERGREEN BROAD-LEAVED FOREST IN HEISHIDING NATURE RESERVE FRACTAL ANALYSIS OF THE DYNAMICS OF POPULATION PATTERNS DURING VEGETATION SUCCESSION VEGETATION CLASSIFICATION OF HEISHIDING NATURE RESERVE AND DIGITIZED MAPPING Ⅱ. THE DISTRIBUTION OF ASSOCIATIONS