贵州佛顶山中亚热带常绿落叶阔叶混交林物种组成与结构

为了解国家级自然保护区贵州佛顶山亚热带植物的多样性和建立有效保护机制,应用样方调查方法,对佛顶山的植物群落物种组成、群落结构、特征、区系以及生物多样性进行调查分析。结果表明:佛顶山有维管植物429种,隶属于131科273属,生活型普以高位芽植物为主;种子植物区系地理成分复杂,植物以亚热带分布科和北温带分布属为主;群落垂直结构明显,分为乔木层、灌木层和草本层;不同群落类型不同层次的物种多样性指数差异性不明显,表现出群落结构越复杂、物种组成越丰富、优势种越不明显、共优种越多和物种多样性指数越高的特点。样地内树种平均胸径较小,主要优势树种的径级结构呈倒J型。

Community Composition and Structure of the Mid-subtropical Evergreen and Deciduous Broad-leaved Mixed Forest in Foding Mountain of Guizhou

To explore the diversity of subtroical plants in National Nature Reserve of Guizhou Foding Mountain and establish effective protection mechanism, sample plot investigation was employed to investigate the species compostion, community structure, floristic characteristics and biodiversity.Results: There were 429 species in 273 genera of 131 families.The biotype majored in phanerophytes;The geographic elements were complicated, and dominated by pantropic distribution families and northern temperate distribution genera.The vertical structure of the community is obvious, which was composed of tree layer, bush layer and grass layer.The indexes were not obviously related to the type of plant community and different layer.The biodiversity among different community types had no significant difference.The biodiversity index became much higher with more complexity of community structure.The plot had a fairly small mean DBH and the size class of dominant trees was reversed J.