广西木论国家级自然保护区掌叶木群落物种多样性特征

采用群落学调查方法,对木论国家级自然保护区内10个掌叶木样地进行了调查研究。结果表明:该群落有维管束植物60科102属123种,群落科属组成较为分散。群落垂直结构完整,成层现象明显。群落外貌以中型叶、单叶、全缘、纸质为主。群落物种丰富度排列顺序为草本层乔木层灌木层;除物种丰富度外,Shannon指数、Simpson指数、均匀度指数排列顺序均为乔木层草本层灌木层,表现出一致的变化趋势。基岩裸露度与物种多样性成反比。

Biodiversity Characteristics of Handeliodendron Community in Mulun National Natural Reserve, Guangxi

By using coenology investigation method, 10 sample plots of Handeliodendron in Mulun National Natural Reserve were investigated. The results showed that, the community had 60 families, 102 generas and 123 species of vascular bundle plants. Community＇ s family and genera composition relatively scattered. The community had integrated vertical structure and obvious stratification phenomenon. The phanerophytes of mesophyll, single leaf, entire margin, paper were main components of physiognomy. Species richness of community was higher in herb layer, and lower in tree layer, the shrub layer was the lowest. Exact species richness, species Shannon index, Simpson index, Evenness index showed a consistent trend. They were higher in tree layer, and lower in herb layer, shrub layer was the lowest. Bedrock exposed degree was inversely pro- portional to species richness.