Peculiarities invasive plant species distribution on the territory of the city of Ivanovo

The article discusses the problems of invasive plant species in Ivanovo, the regional center of Ivanovo Region. 112 invasive and potentially invasive plant species were observed in Ivanovo by 2024. The results of study the peculiarities of distribution of invasive and potentially invasive plant species on the territory of the city, revealed on the basis of grid mapping method are presented. For estimation of general distribution the 4-ball scale developed by the authors was used. It was found that invasive and potentially invasive species are distributed unevenly over the city territory. Only 4 species (Acer negundo, Amelanchier spicata, Erigeron canadensis, Fraxinus pennsylvanica) belong to the group of widespread species that occur in 71–100 quadrats. 43 species occur frequently (in 31–70 quadrats), 38 species occur occasionally (in 11–30 quadrats), and 27 species occur rarely (in 1–10 quadrats). The invasive species were analyzed according to their invasive status. The most dangerous for the city ecosystems invasive species, which are categorized as transformers (9 species in total), were identified. Examples and distribution maps of invasive species of each group are given.