Based on the results of long-term expeditionary studies of invasive processes in the Southern Urals, key invasive species of the firstinvasive status (transformer species) are listed for 3 regions: Republic of Bashkortostan, Orenburg and Chelyabinsk oblasts. A total of 16 alien plant species, 6 species common to all regions among them, were classified as such. The majority of transformers are actively naturalized in natural and semi-natural phytocenoses with the expansion of the occupied area, their dispersal is associated with transport routes, human economic activity and ornamental horticulture. Dangerous invasive species should be the objects of constant environmental monitoring and population control, as they threaten biodiversity and lead to significant changes in natural ecosystems.
L.M. Abramova, Ya.M. Golovanov
