不同生境中杉阔混交林物种多样性特征初步研究

Primary study on the characteristics of species diversity in Chinese-fir and broad-leaved mixed forests in different habitats

根据生境因子应用主分量分析和动态聚类方法进行生境的划分 ,在此基础上分析不同生境中杉阔混交林群落数量特征。结果表明 :不同生境中植物群落的主要优势种组成不一 ,其重要值也不同。不同生境中植物群落乔木层的物种数目、物种多样性、群落均匀度均有较大差异。海拔对不同生境中植物群落乔木层的物种数目、物种多样性和群落均匀度有很大影响 ,坡向则对个体总数和种类数量的影响较大。海拔和坡向对不同生境中植物群落乔木层生态优势度则无明显影响。

The categorization of different habitat types was done with principal component analysis and dynamical clustering based on parameters of the habitat. In addition, the quantitative characteristics of tree organization in Chinese fir and broad-leaved forests in different habitat types were analyzed. The results showed that: the characteristics of main parameters of habitat were distinctly different in different habitat and the dominant species and relative importance values were also different. The total number of species, species diversity, and community evenness of tree organization were different. The influence of altitude on the total number of species and on their ecological dominance was highly significant. Slope-exposure influenced the number of unit more significantly in certain degree. Altitude and slope-exposure had no influence on the ecological dominance of trees in different habitats. The protection of diversity in Chinese-fir and broad-leaved mixed forest in different habitats should be emphasized.