贵州大坪箐湿地自然保护区蕨类植物初步研究

掌握大坪箐湿地自然保护区的蕨类植物的资源情况,通过野外调查,查阅文献资料和分析.得出以下结论：大坪箐地区蕨类植物共24科43属79种（含种下分类单位）,其中以鳞毛蕨科、水龙骨科、金星蕨科等为主;蕨类植物区系成分复杂,区内温带种占绝对优势,为总种数的77.2％,具温带性质.其中,东亚分布有51种,占总种数的64.6％,说明为东亚区系.热带成分种共有14种,世界广布种共有4种,说明区内蕨类植物与热带、亚热带有一定的联系;与贵州大部分地区处在植物分布区的过渡地段上一样,比较多的属（51.2％）在这里只有1种分布,具有其过渡性质.

A Preliminary Analysis of the Pteridoflora in Dapingqing Wetland Natural Reserve Area of Guizhou Province

The floristic composition and geographic feature of pteridophyte in Dapingqing Wetland Nature Reserve were analyzed based on field investigation and data collection. Results were as follows ：24 families, 43 genera and 79 species （ including the taxonomic units below species） of pteridophyte in Dapingqing Wetland Nature Reserve were involved, most of them were Dryopteridaceae, Polypodiaceae or Thelypteridaceae. Floristic elements of pteridoflora in this area was complex. The pteridophyte that accounted for 77.2% in the total species had significant temperate features, which indicated that the temperate species occupied a dominant position. Among them, 51 species were the East - Asia species, accounting for 64.6% of total. These results reflected that the pteridophyte in Dapingqing Wetland Nature Reserve belonged to the East - Asia distribution. Besides, there were 14 species of tropical distribution and 4 species of cosmopolitans, indicating that pteridophyte in this area had close relationship with tropical distribution. As the same of the most areas in Guizhou province, Dapingqing Wetland Nature Reserve located in transition section. Most genera（51.2% ） contained only one species, suggesting that the pteridophyte in this area had transitivity.