东莞清溪山地常绿阔叶林立木结构与多样性  

Stand Structure and Species Diversity in a Montane Evergreen Broadleaved Forest in Dongguan's Qingxi Township,South China

作　　者：杨运振 严朝东 郑潮明 林观土[2] 黄练忠 

机构地区：[1]东莞市大屏嶂林场,广东东莞523725 [2]华南农业大学信息学院 [3]东莞市清溪林场

出　　处：《广东林业科技》2010年第5期28-34,共7页Forestry Science and Technology of Guangdong Province

基　　金：广东省科技计划项目(2009B030802042)

摘　　要：文章研究了广东省东莞清溪山地常绿阔叶林群落组成和立木结构,并用丰富度指数、Shannon-Wiener多样性指数、均匀度指数及Simpson指数分析了群落物种多样性的变化。结果表明：林分内立木的树高和胸径变化总趋势均为小级别的个体占大多数,而且各主要树种的重要值差异不大,这些都表明该群落处于进展演替阶段;处于南亚热带的东莞清溪山地常绿阔叶林Shannon-Wiener多样性指数在0.673~2.539,物种均匀度为0.619~0.977,Simpson指数则为0.480~0.905,其物种多样性指数与陈和洞自然保护区常绿阔叶林的多样性指数相近。总的来说,东莞清溪山地常绿阔叶林的物种多样性指数、均匀度和Simpson指数都比较高。并通过对物种多样性指数的分析,探讨了如何才能维持较高的生物多样性。Species composition and stand structure were studied in a Montane Evergreen Broadleaved Forest in Dongguan′s Qingxi Township.Variations in species diversity were compared and analyzed in terms of species abundance,Shannon-Wiener diversity index,evenness index and Simpson diversity index.According to the investigation,the forest stand showed a trend in concentration of individuals in small DBH or height class and the importance value of main tree species did not differ significantly,indicating that the community was in a progressive successional stage.The Shannon-Wiener diversity index ranged from 0.673 to 2.539,species evenness index from 0.619 to 0.977 and Simpson index from 0.480 to 0.905.The species diversity index of montane evergreen broadleaved forest in this region was similar to that of the evergreen broadleaved forest in Chenhedong Nature Reserve.In general,the species diversity index,evenness and Simpson index were relatively high.Through analyzing species diversity,this paper also aimed to investigate the maintenance of a high biological diversity.

关 键 词：立木结构 物种多样性 均匀度 Simpson指数 

分 类 号：S718.54[农业科学—林学]