黄土高原地区辽东栎群落区系研究

A Study of Quercus liaotungensis Community Flora in the Loess Plateau

根据吴征镒、王荷生区系分析方法,对秦岭区和陕北区辽东栎群落植物区系进行了比较研究。结果表明,秦岭北坡辽东栎群落共有31科60属67种,陕北区共有27科42属51种。秦岭区辽东栎群落与陕北区相比,物种组成较丰富,层次和层片结构较复杂,两地群落相似性不高,这与两地群落的生境条件关系密切。从属和种的区系成分分析来看,两地辽东栎群落的区系性质是温带的;两地群落中的中国特有种占各自群落中总种数的一半或偏多;地理联系较为广泛,尤其与华北区系联系较为密切,与日本区系有一定的联系。

According to the results of observations and comparison study of Quercus liaotungensis community flora in Qinling Mt.and northern part of Shaanxi Province.The results are as follows.There are 67 species of plants belonging to 31 families and 60 genera in Quercus liaotungensis community in Qinling Mt. and 51 species of plants belonging to 27 families and 42 genera in Quercus liaotungensis community in northern part of Shaanxi Province,Quercus liaotungensis community of Qinling Mt. are more comparative rich and complex than that of northern part of the shaanxi province in the floristic component,stratification and structure of synusia. The similarity of floristic component in two communities are low. According to geographical elements of genera and species analyses results, north temperate plays an important role in the flora Quercus liaotungensis community, the flora in two communities is widely related to other area (N. China and Japan).