杭州湾滩浒岛种子植物区系的研究

Study on flora of the Tanxu Island,Hangzhou Gulf

首次报道了我国杭州湾滩浒岛种子植物 67 科 150 属 197 种。并与纬度相近的大金山岛、佘山、天目山及浙江两个海岛进行了植物区系比较。结果表明,滩浒岛植物区系组成较复杂,地理成分多样,并以海岛植物区系丰富,广布性成分较多等为特色。滩浒岛植物区系与纬度相近的大金山岛、佘山、天目山相比,关系密切,而与不同纬度的台州海岛、温州海岛相比,则随纬度由北向南,热带植物区系成分逐步增加,温带、亚热带植物区系成分逐步减少,具有明显的纬向性。

species,150 genera and 67 families of wild seed plants on the Tanxu Island,Hangzhou Gulf were reported for the first time, A floristic analysis and comparisons of Tanxu Island with Dajinshan Island,She Mountain,Tianmu Mountain as well as some islands in the sea of Zhejiang Province with similar latitude were made. The results showed that the floristic compositions of the Tanxu Island were complex and the geographical elements were various. The flora of the Island is characterized by having rich species only distributed on islands and certain species with wide distribution in the world. The flora of Tanxu Island had close relationships with Dajinshan Island,She Mountain and Tianmu Mountain located on similar latitude. However,compared with Taizhou Island and Wenzhou Island on lower latitude,the tropical flora elements increased,temperate and subtropical floristic elements decreased gradually with decrease of the latitude from the North to the South.