古田山国家自然保护区常绿阔叶林植物物种多样性研究

The Plant Species Diversity of the Evergreen Broad-leaved Forest in Gutian Mountain National Nature Reserve

分析了古田山自然保护区常绿阔叶林植物区系和物种多样性。结果表明:古田山自然保护区常绿阔叶林植物种类十分丰富,计有维管束植物64科114属198种(含变种),其中蕨类植物7科8属19种,裸子植物2科2属2种,被子植物55科104属177种。种子植物区系成分复杂,具有较高的热带成分比例。不同群落类型其物种多样性不同,4种常绿阔叶林群落类型中以栲树林物种多样性最高,甜槠—木荷林物种多样性最低。在群落垂直结构中,除钩栗林外,灌木层→乔木层→草本层物种多样性依次降低.乔木层与灌木层的物种多样性指数差异不显著,而乔木层、灌木层的物种多样性指数均显著大于草本层。

The vegetation data of the evergreen broad-leaved forest in Gutian Mountain Nature Reserve are used as the information for analyses of flora and species diversity. There are 64 families, 114 genera and 198 species, including 7 families, 8 genera and 19 species of peridophyte, 2 families, 2 genera and 2 species of gymnosperme, 55 families, 104 genera and 177 species of angiospermae. The floristicelements are complex, and the total of tropical distribution type amounts to 50.94 %. The species diversity of different communities are different, it of Castanopsis forgesii forest numbers first, and it of Castanopsis eyrei- Schima superba forest is the smallest. In the vertical structure of community, the species diversity is the highest on shrub layer, and decreases from shrub, tree layer to herb layer. The species diversity index between the tree layer and the shrub layer has no significant difference, the species richness and species diversity index of the tree and shrub layer are obviously bigger than those of the herb layer.