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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。
Studying the species composition and diversity of the dominant alpine community in karst mountain can provide the basis for the restoration of the karst area, the protection of the alder population and the rational utilization of its resources. By investigating and analyzing the species composition and diversity of Alnus cremastogyne community in eight different areas of Guangxi, the results showed that there were 248 species of vascular plants belonging to 95 genera and 164 genera in 8 Alnus cremastogyne communities, of which, tree species were abundant, The associated species are mainly Guangxi Orophea anceps and Sterculia nobilis. The shrub layer is mainly composed of Schefflera octophylla, Alchornea trewioides, etc. Species; herb layer to ferns, while the middle layer of vine mainly dominated by leguminous plants. The Shannon index (H), Simpson index (D) and evenness index (J) of Alnus cremastogyne communities in different regions maintained the same order of magnitude. Alnus cremastogyne community has some similarities in different areas, whereas Alnus crepa communities with relatively close geographical position show a higher similarity. From the Alnus cremastogyne forest biodiversity index analysis, Napo and Longzhou Nonggang Alnus cremastogyne community recovery is relatively stable.