大连地区外来入侵植物现状报道

大连是辽宁省乃至东北地区外来入侵植物种类最多的地区.根据野外调查和相关报道,大连地区目前有外来入侵植物23科62属78种.这些外来入侵植物,菊科植物种类最多,达24种,占总数的31%;十字花科植物次之,计10种,占总数的13%;苋科植物7种,占总数的9%;豆科植物6种,占总数的8%;其余18科总计31种,占总数的39%.它们由木本、藤本和草本植物构成,最常出现在路旁、水旁、田旁、屋旁,原产地多为北美洲和欧洲,一般通过有意引入、无意带入2种途径进入并扩散.大连市各区县都有外来入侵植物分布,以市内4区种类最多,达62种.

Status report of alien plants in Dalian

Dalian is the region that has the most types of alien invasive plants of Liaoning province and even the northeast. Based on field investigation and relevant report, there are 23 families, 62 genera and 78 species alien plants in Dalian area. In these alien plants,the most abundant family is composi- tae including 24 species, 31% of the total; Cruciferous plant is the second , including 10 species, 13% of the totalt 7 kinds of amaranthaceae, 9% of the total; 6 kinds of legume plants, 8% of the total; The rest of the 18 families have 31 species, 39% of the total. They are composed of woody, vine and herbaceous plants, most often appear in the road, the water, and the field, and the house. Coun- try of origin is North America and Europe, usually by introducing intentionally and accidentally and spreading. Each area of Dalian has invasive plants, the city four areas have the most types, can reach up to 62 kinds.