Study of the Species Diversity of Five Plantation Communities in Shunde,Guangdong

Characteristics of the species diversity of five plantation communities in Shunde,Guangdong province were systematically studied.The results are as follows.Firstly,the species diversity of Eucalyptus exserta,Acacia confusa and Pinus elliottii communities is in the order of shrub layer herb layerarbor layer while that of the mixed coniferous broad-leaved community and mixed broad-leaved community is in the order of shrub layer arbor layer≥herb layer,but the variation of evenness index order appears basically consistent: shrub layer herb layerarbor layer.Secondly,the difference of the species diversity in the five plantation communities reveals that arbor layer is significant and shrub and herb layers are complex;however,the Acacia confusa and Pinus elliottii communities are insignificant and the variation of species diversity among Eucalyptus exserta,Acacia confusa and Pinus elliottii communities is insignificant.Thirdly,among the species diversity index,S_P,S_W and P are the better exponents for the measurement of arbor and shrub layers while J_(sp) and P are the better exponents for the measurement of herb layers.And finally,based on the species diversity of the five plantation communities,the measures for their management have been put forward.