广东石门台自然保护区的藓类植物区系研究

Phytogeography of mosses from Shimentai Nature Reserve, Guangdong

石门台自然保护区位于广东省中北部,面积82260hm2,是全省面积最大的自然保护区。根据过去三年的调查研究,石门台保护区共有藓类植物33科92属176种1亚种5变种。在石门台藓类中,种数较多的科主要有曲尾藓科、灰藓科和凤尾藓科等;种数较多的属主要有凤尾藓属、曲柄藓属和白发藓属等。石门台藓类植物的区系地理成分可划分为12类,其中以东亚成分(25.47%)和热带亚洲成分(17.39%)为主。另外,将石门台与8个邻近地区的藓类植物区系进行比较,与石门台藓类区系最相近的是鼎湖山,最疏远的是神农架。石门台的藓类植物区系被定性为南亚热带性质,但同时东亚和热带亚洲因素也有较大的影响。

Shimentai Nature Reserve lies in the center of north Guangdong, 113°01′11″～ 113°46′22″ E,24°17′49″～24°31′02″ N,with the area of 82 260 hectares. It is the largest nature reserve in Guangdong. Based on our investigations in the past three years,a total of 176 species and 6 infraspecific taxa belonging to 92 genera and 33 families have been found in Shimentai. The principal families of the local bryoflora are Dicranaceae, Hypnaceae,and Fissidentaceae,etc., and the principal genera are Fissidens,Campylopus, and Leucobryum, etc. Twelve floristic patterns are recognized for the mossflora of Shimentai. The distribution patterns of East Asian and Tropical Asian are the two commonest（25.47% and 17.39% respectively）. Of the eight mossflora compared with that of Shimentai,the closest region is Mr. Dinghu,and the remotest is Shennongiia. The nature of Shimentai bryoflora is best described as southern marginal of subtropical, with a strong East Asian and Tropical Asian influence.