Variation in Phenology and Population Distribution Pattern of Three Alpine Species Along the Snowmelt Gradient Age structure and distribution pattern of the dominant population in the evergreen broad leaved forest of Jiulian Mountain in Jiangxi Province Comparison of habitats and seasonally differentiated distribution patterns of fig wasp populations associated with Ficus racemosa in Xishuangbanna Effects of human disturbance on spatial distribution pattern of main population of evergreen broadleaf trees