Study on Community of Rare and Endangered Plant Fokienia hodginsii in Qianjiadong Nature Reserve in Guangxi Province

Rare and endangered community of Fokienia hodginsii was studied by using 5 species diversity indices in Qianjiadong nature reserve in Guangxi province.Floristic composition,structure,physiognomy and the succession of the community were systematically analyzed.The results indicated as follows: The vertical structure of the community was obvious,which was composed by arbor,shrub,herb and layers.There were 81 vascular plant species in the community,belonging to 40 families and 51 genera.Phanerophytes(accounted for 76.54%) were dominant in the life-form,which was representative theropencedrymion of the subtropics;The community had very high species diversity.Species diversity indices of shrub layer were higher than those in arbor layer and herb layer.Richness index F of the community was 3.7998,Simpson index D was 0.8327,Shannon-Weiner index H was 1.9384,evenness index JS based on Simpson index was 0.8443,and evenness index JSW based on Shannon-Weiner index was 0.9130;Whatever the flora or structure are seen from,the community is now at the stable phase,belonging to sub-climax community.