广西老虎跳自然保护区蕨类植物区系研究

Studies on the Pteridophyte Flora of Laohutiao Nature Reserve of Guangxi

关键词:  蕨类植物  区系分析  分布区类型  老虎跳自然保护区

Key words:  pteridophytes  floristic analysis  areal-types  Laohutiao Nature Reserve

摘要:

[目的]广西老虎跳自然保护区的蕨类植物本底还不清楚,旨在通过研究,进一步丰富该保护区蕨类植物区系资料,促进科学合理地保护和利用该保护区的植物资源。[方法]通过野外标本采集、调查,室内整理、鉴定,对该保护区的蕨类植物区系进行统计分析。[结果]发现保护区蕨类植物共有37科,69属170种。热带科与温带科比例为12:1,热带属与温带属比例为3:1。属于东亚分布及其变型的属共有8属,其中,4属为中国-喜马拉雅变型,1属为中国-日本变型。[结论]该保护区少种科、属数量多,区系热带性质明显,蕨类植物区系具有亚热带性质。

Abstract:

[Objective] The pteridophyte background of Laohutiao Nature Reserve is not clear.This study aims at enriching the pteridophyte data and promoting scientific and reasonable protection and utilization of the pteridophyte resources of the reserve.[Methods] Based on field investigation and indoor data, statistical analysis was conducted on the pteridophyte flora of the reserve.[Results] The results show that 170 pteridophyte species belong to 69 genera in 37 families.The ratio of tropical family and temperate family is 12:1.The ratio of tropical genus and temperate genus is 3:1.Eight genera belong to East Asia distribution and its variant.Four genera belong to Sino-Himalaya distribution and one belongs to Sino-Japan distribution.[Conclusion] The pteridophyte flora of the reserve reveals rich families and genera with few species, and shows obvious tropical characteristics with subtropical nature.