Analysis on Species Diversity of Evergreen Broad-leaved Forest in Jiulianshan Mountain of Jiangxi Province

Based on the field studies data of evergreen broad-leaved forest in Jiulianshan Mountain of subtropical area in Jiangxi Province of South China,the species and community of α-diversity and β-diversity in the major natural evergreen broad-leaved community were investigated.The measure indices of α-diversity were included Patrick abundance index,Shannon-wiener species diversity index,Simpson dominance index,Pielou evenness index and Margalef abundance index;the measure index of β-diversity was Community Dissimilarity in the paper.The results showed that most α-diversity indices in different layers of different communities were different from each other.The indices of tree layer was usually lower than that of shrub layer,and was bigger than that of herb layer,which was consistent with the general pattern in subtropical forest ecosystem in South China.The species diversity indices and dominance indices of the forests were negative correlation,and the value of the correlation coefficient was-0.88(P=0.01).The community evenness indices and Shannon-wiener indices of the evergreen broad-leaved forest were positive correlation,and the value of the correlation coefficient was 0.629(P=0.01).The Community Dissimilarity in different communities could express the difference of different communities and their habitat.The Community Dissimilarity of most communities were greater than 0.6,and which was the highest among the artificial Liquidambar formasans and the natural Castanopsis eyrei,the value of their Community Dissimilarity Coefficient was 1,it showed that the great difference of their components and the diversity of their habitat in different communities.