重庆市主城公园绿地外来入侵植物调查研究

Investigation on alien invasive plants in the green space of the main urban park in Chongqing city

对重庆市主城公园绿地外来入侵植物的种类组成、原产地及区系成分等进行了分析研究。结果表明,重庆市主城公园绿地外来入侵植物计19科34属41种,其中,园林植物入侵种11科15属17种,园林入侵杂草10科19属24种,均以菊科种类为最多;从来源看,有33种来源于美洲,种类为最多,其余原产地为欧洲、亚洲、非洲等;在科的组成上,单种科、小型科构成了重庆市主城公园绿地外来入侵植物科的主体;在区系成分方面,科和属的区系组成中均具有明显的热带区系特征。

The species composition,origin and faunal composition of alien invasive plants in the green space of the main urban park in Chongqing were analyzed.The results showed that there were 41 species of alien invasive plants belonging to 34 genera and 19 families in the green spaces of Chongqing's main urban parks.Among them,garden invasive plants belonged to 17 species belonging to 15 gen⁃era and 11 families,and garden invasive weeds belonged to 24 species belonging to 19 genera and 10 families,the rest were weeds,the most were species of Asteraceae;In terms of origin,33 species are from America,the largest number of species,and the rest are from Europe,Asia,Africa,etc.In terms of family composition,single species and small family constituted the main body of alien in⁃vasive plant family in the green space of chongqing main city park.In terms of floristic composition,the floristic composition of both families and genera has obvious tropical floristic characteristics.