Phyllostachys pubescens Community Characteristics in Yangmingshan Mountain,Hunan

Based on sample plots,Phyllostachys pubescens community characteristics inYangmingshan National Forest Park were analyzed.Results showed that there are four community types,pure Phyllostachys pubescens forest,Castanopsis eyrei+Phyllostachys pubescens forest,Phyllostachys pubescens+Pinus massoniana forest and Phyllostachys pubescens+Taxus chinensis var mairei forest.Pure Phyllostachys pubescens forest is the largest in area.There are 46 species,belonging to 41 genera,26 families,8 geographical distribution types.Ratio of temperate genera(51.2%) is slightly higher than that of the tropical(48.8%).The community structure is relatively simple,Phyllostachys pubescens is the single dominant species.The life-form of Phyllostachys pubescens community is composed of phaenerophytes,and leaves are mainly mesophyll,simple,coriaceous,entire leaf.Different Phyllostachys pubescens community types have different richness index,diversity index and average spaces between trees.Results of analysis on the level of diameter and age showed that Phyllostachys pubescens community in Yangming Mountain is declined.