江西部分常绿阔叶林物种多样性的研究

采用群落物种丰富度Ｒ，群落物种多样性指数Ｄ（Ｓｉｍｐｓｏｎ指数）及群落均匀度Ｊ三个定量指标测定物种多样性。结果表明，不同的森林类型其物种多样性；同一森林类型，由于生境的不同，其物种多样性也不同；群落物种多样性与优势种重要值成负相关，优势种重要值越大，物种多样性越小，群落的组成、层次结构越简单，林分材积生产力越大。

STUDY ON THE SPECIES DIVERSITY IN PART OF THE EVERGREEN BROADLEAVED FOREST COMMUNITIES OF JIANGXI

The species diversity of parts of the evergreen broadleaved forest communities in JX is studied in this paper. The quantitative indices include the Simpson diversity indices and species richness and evenness of the community. The result are as follows: different forest community types have different species diversity. The diversity varies in the similar forest community type within different habitate. The diversity is a inverse proportion to the importance value of dominant species, e. g. the more of the importance value, the lower of the diversity; the simpler of the composition and layer structure of forest community; the higher of the stem wood productivity of stand.