二滩库区及周边地区的种子植物区系研究

二滩库区及周边地区种子植物有148科671属1 354种,其中裸子植物6科12属25种;被子植物142科659属1 329种,由于地形、地质及气候土壤条件的影响,衍生出复杂多样的植被类型,其植物种类丰富,生物多样性高。从科、属、种水平进行了统计分析和聚类分析得出其种子植物区系的特点是:大科、中等科和多种科是本区系的主体,科级水平上主要包括热带成分,同时温带成分占有重要地位,区系具有一定的古老性;属级、种级水平上热带、温带成分并重,并且向温带过渡,属级水平上与庐山、凤阳山聚为一类,相似性高,属于中亚热带植被类型。并且属级、种级水平上,15种分布类型中均有分布,地理成分复杂;特有和保护的植物种类较多。

Study on the spermatophyte flora in Ertan Reservoir and surrounding regions

There are 1 354 species of seed plants,belonging to 148 families and 671 genera,among which gymnosperms contain 25species,12 genera and 6 families,and angiosperms contain 1 329 species,659 genera and 142 families in Ertan Reservoir and surrounding regions.For topographic characteristics,climates,soils and vegetations,there are complex vegetation types and high diversity of family,genus and species,and a great variety of plants which composition is complex.Statistics analysis of the seed flora was studied based on the families,genera and species level.The conclusions are as follows:(1) the big,middle and multi-species of family are rich and tropical element is dominant obviously on family level.The flora is ancient;(2) the tropical and temperate elements are dominant and the types of distribution are various and geographical elements are complex on genus and species level.In genus level,it is belonging to subtropical type,gathering with Lushan and Fengyang mountains;(3) endemic and protected plants are abundant.