云南纳板河保护区蕨类植物区系地理研究

Floristic Phytogeography of Pteridophytes in Naban River Watershed National Nature Reserve of Yunnan

通过多次野外调查及资料整理,对纳板河流域国家级自然保护区蕨类植物的区系组成、地理成分、区系联系、性质及起源等方面进行了分析研究。结果显示:(1)纳板河保护区共有蕨类植物43科90属239种,优势科为水龙骨科、金星蕨科、凤尾蕨科、蹄盖蕨科、三叉蕨科,优势属为凤尾蕨属、鳞盖蕨属、毛蕨属、石韦属。(2)纳板河保护区蕨类植物区系具有明显的热带向亚热带过渡的性质,当属热带亚洲蕨类植物区系,但在一定程度上受到中国-喜马拉雅蕨类植物区系的影响。(3)纳板河保护区在地理亲缘关系上与云南大围山最为密切,与海南岛、哀牢山保护区的关系次之,与苍山、轿子雪山及雕林山保护区的联系较为疏远。

Based on several field investigations and numerous data references,we analyzed the floristic composition,geographical element,floristic affinity,floristic characteristics and floristic origination of pteridophytes in Naban River Watershed National Nature Reserve in the present paper.The main results are as follows:(1)there are totally239fern species,belonging to90genera and43families in the area.The dominant families are Thelypteridaceae,Pteridaceae,Athyriaceae and Aspidiaceae,and the dominant genera arePteris,Microlepia,Cyclosorus and Pyrrosia.(2)Floristic analysis reveals that the pteridoflora is of tropical nature,but characterized with conspicuous transition to southern subtropics.It is confirmed that the pteridoflora of Naban River Watershed National Nature Reserve is a part of Tropical Asian pteridoflora,but affected by SinoHimalaya pteridoflora in some extent.(3)On the aspect of geographical connection,the pteridoflora of Naban River Watershed National Nature Reserve has the strongest affinity with Dawei Mountain,followed by Hainan Island and Ailaoshan Mountain Nature Reserve,and has a distant relation with Cangshan Mountain,Jiaozixueshan Mountain and Diaolin Mountain Nature Reserve.