阳江市野生植物及其区系研究

Wild Plants and Flora in Yangjiang City

采用样线调查法,在阳江市野生植物资源集中区域开展野生维管植物调查,并分析其植物种类组成与区系特征。结果表明:(1)阳江市有野生维管植物212科1059属2478种,被子植物数量最为丰富。(2)野生植物的科组成以寡种科和单种科占优势,属组成以小属和单种属占绝对优势,说明科、属的分化程度较高。(3)从科的区系成分看,以世界广布、泛热带分布为主;在属级水平上,以热带亚热带成分为主,具有热带向亚热带过渡性质,同时温带成分也占有一定优势。(4)植物区系特有现象突出,阳江市含有东亚特有科19科,中国特有属18属20种,广东特有植物19种。阳江市野生维管植物种类丰富,具有典型的南亚热带植物区系特点。

The method of transect survey was applied to investigate the wild vascular plants in the wild plant resource concentration area of Yangjiang city,and species composition and flora characteristics were analyzed.The results showed that:i)There were 2478 species of wild vascular plants belonging to 1059 genera and 212 families in Yangjiang city,and flowering plants were the most abundant;ii)the family composition of wild plants is dominated by oligo-specific and monotypic families,and the composition of the genus is dominated by small genera and single species,indicating a high degree of differentiation between families and genera.;iii)from the perspective of the floristic composition of the family,it is mainly distributed worldwide and in the pan tropical region.At the genus level,it is mainly composed of tropical and subtropical components,with a transitional nature from tropical to subtropical,while temperate components also have certain advantages;iv)the unique phenomenon of flora is prominent.Yangjiang city contains 19 families of east Asian endemic families,18 genera and 20 species of Chinese endemic genera,and 19 species of Guangdong endemic plants.In general,Yangjiang city is rich in wild vascular plants,which have typical of the subtropical flora.