The results of studies on the distribution of 30 alien plant species in the territory of 41 specially protected natural areas in the Bryansk region are presented. The role of invasive species in the vegetation cover of most studied areas is currently insignificant. In all specially protected natural areas, only Erigeron annuus (L.) Desf. and E. сanadensis L. were recorded; Oenothera biennis L., Acer negundo L., Bidens frondosa L., and Echinocystis lobata (Michx.) Torr. & A. Gray were often found. Among the most dangerous invasive species are Acer negundo, Arrhenatherum elatius (L.) J. Presl & C. Presl, Impatiens glandulifera Royle, Solidago сanadensis L., Cornus alba L., Zizania latifolia (Griseb.) Stapf. River valleys are the main natural corridor for the spread of alien species. The minimum number of invasions was noted in forest and swamp ecosystems.

N.N. Panasenko