北辰区永定河及重要支流河岸带植物区系分析

Floristic analysis of riparian vegetation in Yongding River and its tributaries in Beichen section

对北辰区永定河及其重要支流生态环境现状、河岸带植物多样性及其区系进行分析调查评价,共调查到植物24科55属65种,以广布科、属居多,其次是泛热带至温带成分,特有种不明显,基本无外来种。从种的科、属分布统计可以看出,研究区植物种类优势科主要集中在菊科、禾本科等世界性大科,多数科只有少数种或为单种科。属的组成与科的组成特点类似,主要以单种属为主。

The status of ecologic environment,plant diversity and flora of Yongding River and its important tributaries riparian zone in Beichen section were analyzed and evaluated.The results showed that:there were 65 species in 55 genera and 24 families of spermatophyte.most of which were cosmopolitan,secondly were pantropic.The endemic species were not obvious,and there were no exotic species basically.According to the distribution statistics of families and genera,the plants in the study area were concentrated in some world-wide families such as Compositae and Gramineae,while they were scattered to oligophytic families and single species families.The genera analysis results were similar.