江西省齐云山自然保护区的蕨类植物区系

对齐云山自然保护区蕨类植物资源进行调查和文献研究,记录该地区蕨类植物40科86属230种.分析表明:(1)该保护区中蕨类植物的优势科、优势属均表现明显,优势科有鳞毛蕨科、金星蕨科、蹄盖蕨科、水龙骨科和凤尾蕨科等,优势属有鳞毛蕨属、凤尾蕨属、卷柏属、铁角蕨属和短肠蕨属等;(2)属的区系地理成分划为4大类,热带分布的属占优势,为总属数的60.5%,世界分布属占20.9%,温带分布属占17.4%,中国特有属占1.2%;(3)种的区系地理成分也可划为4大类,温带分布种(114种)所占的比例最大(49.6%),热带分布种占有较大的比例(30.0%),中国特有种占18.7%,世界分布种占1.7%;(4)在种的相似性上比较,该保护区与井冈山的相似性系数最高(59.7%),而与大瑶山的相似性系数最低(36.7%).

The Fern Flora of Qiyunshan Nature Reserve,Jiangxi,China

A series of extensive field investigations were carried out in Qiyunshan Nature Reserve from May to July,2007.A total of 230 species were recorded,belonging to 86 genera and 40 families.A detailed floristic analysis showed:(1)In this flora,the dominant families consisted of Dryopteridaceae,Thelypteridaceae,Athyriaceae,Polypodiaceae,and Pteridaceae,etc.; The dominant genera consisted of Dryopteris,Pteris,Selaginella,Asplenium,and Allantodia,etc..(2)The percentages of the tropic,cosmopolitan,temperate and endemic to China genera in the flora of Qiyunshan Nature Reserve were 60.5%,20.9%,17.4% and 1.2%,respectively.(3)At species level,the percentages of the temperate,tropic,endemic to China,and cosmopolitan elements in the flora of Qiyunshan Nature Reserve were 49.6%,30.0%,18.7%,and 1.7%,respectively.(4)Compared with the floras of seven neighboring areas,the phytogeographic relationship of Qiyunshan Nature Reserve's ferns was close to that of Jinggangshan,and obviously distant to that of Dayaoshan.