Analysis of Community Structure and Species Diversity in Natural Vegetation of Baihuwan

This paper studies the community structure and species diversity in natural vegetation of Baihuwan The results show that: (1) The natural vegetation has 5 typical community.The community structure is complicated and the vertical structure is clear. The dominant tree species include 9 families and 16 species.The tree layer and main component part is deciduous board-forest.(2)The phanerophytes such as tree and shrub predominate in the biological spectrom.(3)The species composition is complex,including 158 families,454 genera and 823 species in this natrual vegetation ,of which there are 15 species of rare-valuable plants .(4)The species diversity index varies with altitude artificial disturbance.