广西千家洞自然保护区珍稀濒危植物福建柏群落的研究

采用5个物种多样性指数对广西千家洞自然保护区珍稀濒危植物福建柏(Fokienia hodginsii(Dunn)Henry etThomas)群落进行物种多样性测定,系统地分析了群落的种类组成、结构、外貌、演替等。研究结果表明:群落垂直结构明显,可分为乔木层、灌木层、草本层、地被层。共有维管束植物81种,隶属40科,51属。生活型以高位芽植物占优势(76.54%),是典型的亚热带针阔混交林。群落的物种多样性高,各项物种多样性指数的大小关系:灌木层>草本层>乔木层。整个群落的丰富度F高达3.7998;Simpson指数D为0.8327,Shannon-Wiener指数H为1.9384;基于Simpson指数的均匀度指数JS为0.8443,而基于Shannon-Wiener指数的均匀度指数JSW为0.9130。从植物区系上或结构上来看,目前这个群落已经稳定,属于亚顶级群落。

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.