乌江河岸带维管植物区系的初步研究

Floristic Analysis of Vascular Plants in Riparian Zone of Wujiang River

对乌江河岸带维管植物区系的研究结果表明,河岸带共有维管植物69科187属302种,其中蕨类植物9科10属16种,裸子植物1科1属1种,被子植物59科176属285种。生活型以草本为主,其次是灌木。科、属、种的分布区类型多样,在科级水平上有7个类型和4个变型,在属级水平上有13个类型和10个变型,在种级水平上有15个类型和13个变型。地理联系较为广泛,与北温带植物区系联系最为紧密,其次是泛热带植物区系和东亚植物区系。科、属的优势现象较为明显。该河岸带植物区系呈亚热带性质,与热带植物区系有较高的亲缘关系。

Based on plot research of known vascular plants,69 families,187 genera and 302 species were found along the riparian zone of Wujiang River.These plants included 9 families,10 genera,and 16 species of the pteridophyta,and 60 families,177 genera,and 286 species of the seed plants.Of seed plants found,there was 1 family,1 genus,and 1 species of gymnosperm,and 59 families,176 genera,and 285 species of angiosperm.The flora was mainly composed of herb species and shrub species.Analyses of vascular plants in the riparian zone showed that the area types of families,genera and species were abundant.For family level,there were 7 area types and 4 subtypes,for genus level,there were 13 area types and 10 subtypes,and for species level,there were 15 area types and 13 subtypes.The riparian flora had wide geographical relationships with the other flora in the world,especially with North Temperate,Pantropic and East Asian flora.In addition,the phenomena of dominant families and genera were obvious in the riparian zone.The riparian flora was subtropical in nature,and showed a close relationship with Tropical flora.