Invasive Plants of the Yaroslavl Region
For the first time the list of invasive and potential invasive plant species of the Yaroslavl region and their distribution on groups depending on the degree of the activity and features of distribution are represented. The present flora of this district comprises 361 alien species, among them 230 are successfully naturalized in broken, natural and semi-natural communities and 41 are invasive plants. The majority (e.g. Bidens frondosa, Elodea canadensis, Epilobium adenocaulon, Solidago gigantea) have invaded riparian communities and water bodies. Some species (e.g. Acer negundo, Amelanchier spicata, Impatiens parviflora and others) are commonly recorded in different types of forest and shrub ecosystems. 10 species are most aggressive and play a role of transformer. Examples of local invasions are described. A potential invasive group comprises 29 alien species, which compete successfully with native species and tend to invade plant communities (e.g. Artemisia sieversiana, Festuca arundinacea, Lathyrus tuberosus, Medicago sativa and others).