On the Community Classification and Species Diversity of Rhododendron huadingense

Based on the coenology investigation in Huading Mountain and Dapan Mountain where are the distribution regions of Rhododendron huadingense,the paper analyzed the species similarity,community similarity and species similarity between the two regions.The results show that the Sorensen index of species similarity between two plots in Huanding Mountain and four plots in Dapan Mountain reaches 0.333 3.PCoA of six plots is great different,which shows great heterogeneity of the communities of Rhododendron huadingense.The Simpson index,Shannon-Wiener index,Pielou evenness index and Margalef richness index vary to the consistent trend in the tree layer,shrub layer and herb layer of the plots.In the tree layer,the species diversity of Corylopsis sinensis community is the highest,while those of Pinus taiwanensis community and Cryptomeria fortunei community are the lowest.In shrub layer,the species diversity of Pinus taiwanensis community and Platycarya strobilacea-Pinus taiwanensis community are the highest,whereas that of Pinus taiwanensis-Rhododendron huadingense community is the lowest.The species diversity embodies that the communities of Rhododendron huadingense are not stable.Based on the community similarity and stability,the chief protective measures for Rhododendron huadingense are in-situ conservation,avoiding human disturbance and increasing the researches on the artificial breeding.