广东森林群落的组成结构数量特征

本文探索森林群落组成结构水平的定量描述方法。通过用Shannon—Wiener多样性指数、Simpson生态优势度指标以及群落均匀度指标，测定广东范围内22个森林群落的物种多样性、生态优势度和群落均匀度。结果表明这三种指标值能有效地表征群落的组成结构特征；广东亚热带常绿阔叶林群落的物种多样性指数为4—5左右，群落均匀度为0.7—0.8左右，生态优势度为0.08—0.12左右。文章还对测定结果进行分析，进一步探讨了三种指标值的相互关系，三种指标值在群落学研究中的意义，以及在林业实践上的作用等。

THE QUANTITATIVE CHARACTERS OF ORGANIZATION OF FOREST COMMUNITIES IN GUANGDONG

The paper studies on the characters of organization of forest commu-nities in Guangdong. The diversity and ecological dominance as well ascommunity evenness of twenty two forest communities in Guangdong aremeasured on the basis of Shannon-Wiener index and Simpson index aswell as evenness formula. The results show that three indexes have aneffect on explaining the organization level of forest community. The spe-cies diversity index of subtropical evergreen broadleaved forest is about4-5, the ecological dominance is about 0.08-0.12, the community evennessis about 0.7-0.8. According to the further research of the measured re-sults, the relationships between three indexes and the meaning of threeindexes in community study as well as the application of three indexesin foresty practice are discussed