广东石门台自然保护区的蕨类植物区系分析  

A study on the fern flora of Shimentai Natural Reserve, Guangdong, China

作　　者：张荣京[1] 邢福武[1] 陈红锋[1] 严岳鸿[1] 韦强[1] 

机构地区：[1]中国科学院华南植物园

出　　处：《植物研究》2005年第3期358-365,共8页Bulletin of Botanical Research

基　　金：广东英德市政府资助项目(20011106);香港嘉道理农场暨植物园资助项目

摘　　要：通过野外调查和标本参考,广东英德石门台国家自然保护区蕨类植物区系共含47科,96属,293种。分析表明:(1)热带、亚热带分布性质的科为主(31科),占66.0%,非热带性分布科(16科),占34.4%。(2)热带、亚热带性质的属占优势(64属,占66.7%),其中泛热带分布属(24,25.0%)和热带亚洲分布属(19,19.8%)是最重要的分布类型。世界分布属占26.4%,温带分布属很不明显,占7.3%。属的这种分布格局,显示出该区蕨类植物区系从热带成分向亚热带成分的渗透和过渡。(3)热带、亚热带分布种(139种)所占比例最大(47.4%),其中以热带亚洲性质的占优势(103,35.2%);温带成分占较大的比例(34.1%)。种的分析结果与属的分析结果相差很大,出现区系相互渗透的现象。(4)在种的相似性比较上,与东部车八岭的相似性最高(38.5/59.2);与西部大瑶山种的相似性最低(21.5/35.6)。该区的蕨类植物区系与周围地区关系较为密切。Based on our survey and specimen examination, 293 ferns in 96 genera and 47 families are recorded in Shimentai Natural Reserve, Guangdong, China. A detailed floristic analysis shows： （1） The tropical and subtropical families are dominant （ 31 families）, which constitute 66.0% of the total families, and the non-tropial familes（16 families） constitute 34.4%of total families. （2） The percentages of the tropic-subtropic, cosmopolitan and temperate genera in fern flora of Shimentai natural reserve are 66.7%, 26.4% and 7.3%, respectively. The pantropical genera （25.0%） and the tropical Asia genera （ 19.8% ） are the most important types. The above distribution pattern reveals the transitiveness of the elements from tropical to subtropical. （3） The percentages of the tropic-subtropic, temperate, endemic to China, cosmopolitan and endemic to zone species in fern flora of this reserve are 47.4%, 34.1%, 13.7%, 3.8% and 1.0%, respectively. So it is very different from the analysis of the genera＇s distribution. And the floras are being in transitiving. （4） In the 5 areas, the genetic relationship of Shimentai Nature Reservation＇s ferns are intimate to HongKong＇s （70.4/82.8： Kjaccard/Krober）, and are distant to Longqishan （58.7/74.9）. Originally, the ferns of Shimentai Nature Reservation are ancient. And Shimentai area lies in the interface of south Asia subtropical and middle Asia subtropical floristic area.

关 键 词：蕨类植物区系 区系分析 分布区类型 石门台自然保护区 广东省 广东石门台自然保护区 植物区系分析 国家自然保护区 分布性质 亚热带 

分 类 号：Q948.15[生物学—植物学] Q949.36