海南铜铁岭低地雨林蕨类植物区系及其特点

对海南铜铁岭热带低地雨林地区的蕨类植物区系进行了研究,结果表明铜铁岭共有蕨类植物117种,隶属40科、71属.含6种以上的科有水龙骨科、金星蕨科、铁角蕨科、叉蕨科、陵齿蕨科、膜蕨科和凤尾蕨科,它们是组成铜铁岭蕨类植物的优势科.根据植物的现代地理分布,本区的蕨类植物属和种的分布区类型中热带成分分别占非世界分布的95.31%和75.21%,说明了该地区蕨类植物区系与热带植物区系有着广泛的联系,热带性较强;本区蕨类植物大多数是林荫湿生或附生类型.七指蕨种群是该区珍稀蕨类植物,应该加强保护.

Fern Flora and Its Characteristics of the Lowland Rainforest in Tongtieling,Hainan Island

Fern flora in Tongtieling,Hainan Island composes of 117 species of 71 genera in 40 families.The species-rich families are Polypodiaceae,Thelypteridaceae,Aspleniaceae,Aspidiaceae,Lindsaeaceae,Hymenophyllaceae and Pteridaceae,all of which contain over 6 species.Phytogeographilly,the tropical and subtropical elements of pteridophyte genera and species of Tongtieling is about 95.31% and 75.21% of the total except cosmopolitan element,respectively.The main elements are of tropical Asia,pantropic and east Asia distribution,so it is concluded that the fern flora has stronger tropical nature;the ecological types of this flora mostly are under forest soil ferns or epiphytes ferns.The rare and endangered ferns in this area especially for population of Helminthostchys zeylanica are suggested to be protected also.