桂西南蚬木优势群落物种组成及多样性特征  

Species composition and diversity characteristics of Excentrodendron hsienmu-dominated communities in southwestern Guangxi,China

作　　者：申文辉[1] 谭长强[1] 何琴飞[1] 彭玉华[1] 郑威[1] 何峰[1] 

机构地区：[1]广西壮族自治区林业科学研究院,南宁530002

出　　处：《生态学杂志》2016年第5期1204-1211,共8页Chinese Journal of Ecology

基　　金：广西林业科学研究院基本科研业务费项目(林科201413号);广西林业科技项目(桂林科字[2014]02号);广西优良用材林资源培育重点实验室开放课题(13B0101)资助

摘　　要：研究喀斯特山地蚬木优势群落物种组成及多样性特征,可为喀斯特地区植被恢复、蚬木种群的保护及其资源的合理利用提供依据。通过调查和分析广西8个不同地区蚬木优势群落物种组成及多样性,结果表明:8个蚬木群落共调查到维管植物248种,隶属于95科164属,其中乔木层物种较为丰富,其伴生种主要有广西澄广花(Orophea anceps)、苹婆(Sterculia nobilis)等,灌木层除了乔木层主要树种外,主要有鹅掌柴(Schefflera octophylla)、红背山麻杆(Alchornea trewioides)等物种;草本层以蕨类植物居多,而中间层藤本植物主要以豆科植物为主。不同地区蚬木群落各层次Shannon指数(H)、Simpson指数(D)及均匀度指数(J)大小顺序均保持一致的变化趋势。不同地区蚬木群落具有一定的相似性,而地理位置相对靠近的蚬木群落则表现有更高的相似度。从蚬木乔木层生物多样性指数分析,那坡及龙州弄岗蚬木群落恢复较为稳定。Studies on species composition and biodiversity pattern of Excentrodendron hsienmu- dominated communities in Karst Mountain can provide certain basis for the vegetation restoration, and the protection and reasonable use of E. hsienmu in karst area. We investigated the species composition and diversity characteristics of E. hsienmu-dominated communities at eight sites in Southwestern Guangxi, China. The results showed that there were 248 vascular species belonging to 95 families 164 genera in the communities of the eight sites with the tree layer species being more abundant. The main accompanying species were Orophea anceps, and Sterculia nobilis. In addition to species occurring in the tree layer, there were such species as Schefflera octophylla, Alchornea trewioides in the shrub layer. The pteridophyte was the dominant species in the herb layer while the main liane in the interlayer was legume plants. The Shannon, Simpson and even- ness indexes maintained consistent trends in the different layers at the eight sites. The E. hsienmu forest communities at different sites showed certain similarity, and those who were geographically relatively closed showed higher similarity. The communities in Napo, and Longzhou Nonggang were more stable in terms of the biodiversity indexes of the tree layer.

关 键 词：蚬木 喀斯特 植被恢复 森林演替 阔叶林 

分 类 号：S792.99[农业科学—林木遗传育种]