Responses of leaf unfolding and flowering to climate change in 12 tropical evergreen broadleaf tree species in Jianfengling, Hainan Island EFFECTS OF FORESTATION BY KEEPING BROADLEAF TREES IN PLANTING CUNNINGHAMIA LANCEOLATA Effects of human disturbance on spatial distribution pattern of main population of evergreen broadleaf trees STUDIES ON THE FIRE-RESISTANCE OF 37 SPECIES OF CONIFEROUS AND BROADLEAF TREES AND IT‘S APPRAISAL Study on the Niche and Competition of Populations in Man-natural Mixed Forest of Cunninghamia lanceolata and Broadleaf Trees