Taxonomic structure of dendroflora species in Arkhangelsk region urban systems

Conservation and increase of biological diversity are recognized as one of the priority areas of research activities. The woody vegetation of the northern forests is not rich in species composition. A review of the some research indicates that the number of ornamental species for practical use can be expanded by means of non-district woody plants. The experience of their cultivation in various regions of the North has been accumulated. A significant enrichment of the assortment of urban green spaces is possible due to the introduction of plants into new conditions — introductions. Such peculiar and specific conditions are created in urban plantings that not all local species of woody plants can grow normally in them, therefore it is especially important to study the behavior of dendro-producers. The cultivation of introduced species in the green spaces of northern cities is a basic vector for the promotion of new tree species to the north, which have a whole complex of valuable properties: adaptive, biological, sanitary-hygienic, aesthetic, social. As a result of the inventory assessment, it was revealed that there are 53 species in the Arkhangelsk agglomeration, 24 of them are woody, 29 are shrubs. Introduced breeds make up more than half of the entire assortment and are representatives of domestic and foreign flora. About 20 species of non-district breeds are included in the plantings in small numbers, some breeds number dozens of individuals. Large district centers of the Arkhangelsk region: Karpogory, Oktyabrsky, Pinega, Konosha, etc., as well as the cities of Velsk, Kargopol, Nyandoma, Shenkursk in their assortment do not have a wide representation of non-district breeds, but, as our research shows, the necessary conditions and prerequisites for their appearance are available.