闽西常绿阔叶林植物区系分析

Floristic analysis of the evergreen broad-leaved forest in Minxi,Fujian Province

采用群落生态学的方法对闽西常绿阔叶林植被展开调查。结果表明:闽西常绿阔叶林植物种类丰富,维管植物计有116科235属398种(包括亚种和变种) ;在科、属和种的分布区类型统计与分析中,热带分布55科、温带分布21科,热带分布142属、温带分布68属,热带分布231种、温带分布148种,其中中国特有分布类型有1科、7属51种,热带、亚热带分布区类型与温带分布区类型的比例分别为100∶38 .18、100∶47 .89和100∶64 .07 ,说明闽西常绿阔叶林植物区系具有明显的热带、亚热带地理性质;构成闽西绿阔叶林群落乔木与灌木层的数量优势表征科为樟科、壳斗科、木兰科、山茶科、茜草科、大戟科、桑科、冬青科等多为热带或亚热带科,均为华夏植物区系的典型成分,且含有许多古老、原始的类群;通过比较不同纬度分布的常绿阔叶林植物区系,闽西常绿阔叶林植物区系具有显著的中亚热带植物区系向南亚热带植物区系过渡的特点。

On the base of 1.6 hm2 cumulative sampling plots investigation of evergreen broad-leaved forest in Minxi,116 families,235 genera and 398 species of vascular plants were recorded. Through areal types analysis of family,genera and species,there were 55 families,142 genera and 231 species belonging to tropical-and-subtropical distribution. On the contrary,there were 21 families,68 genera and 148 species falling into the temperate distribution. The rate of tropical-and-subtropical to temperate of family,genera and species was 100∶38.18,100∶47.89 and 100∶64.07. There were 1 family,7genera and 51 species belonging to the Endemic to China areal type. These results revealed that this flora was obviously tropical and subtropical geographical. Dominant families of the flora were Lauraceae,Fagaceae,Magnoliaceae,Theaceae,Rubiaceae,Euphoarbiaceae,and Moraceae,Aquifoliaceae most of which were in tropical and subtropical distribution,those families holding many ancient and primitive genera and species,were typical component of chinese flora. The transition characteristic of this flora,from typical subtropical flora to south subtropical flora,was notable by comparing with different latitude areas.