Communitycharacteristics and species diversity research of Acer ginnalain Qiliyu,Shanxi

Based on a survey of 73community quadrats,TWINSPAN and four indices(Patrick,Simpson,Shannon and Alatalo index) of species diversity were used to analyze differences in richness,evenness and heterogeneity between the communities.The correlation analysis was performed to reveal the relationship between diversity indices and environmental factors.The results showed that Acer ginnalacommunities were classified into 10associations.Among 10 associations,there were differences of richness indices,diversity indices and evenness indices.The indices of species diversity of the asso.ⅢandⅦ were higher,while that of the asso.Ⅰwas lower relatively.The differences of species diversity of arborous layer,shrub layer and herb layer in each association also had occurred.The richness and diversity indices showed similar rule,namely herb layershrub layerarborous layer.The evenness indices of different layer,however,were the other way round.The main factors were physical micro-environmental factors such as organic matter,K + and water content in soil for the community structure of Acer ginnala.