As a result of long-term studies of the flora of three specially protected natural areas in the KondoSosvinsky Ob region, 160 species of alien plants were identified, 66 species (15.6 % of the total flora) among them were registered in the Nature Reserve «Malaya Sosva», 94 species (20.9 %) in the Nature Reserve «Verkhne-Kondinsky», 103 species (29 %) – in the Natural Park «Kondinsky Lakes». There are 44 alien species common to all specially protected natural areas. Over the past 80 years, the number of alien species has increased in 3.2 times; the main routes of their introduction are transport corridors, cultivated fields, as well as the introduction of plants into populated areas and cordons.

A.L. Vasina, N.N. Korotkich