Syanthropic fraction of the flora of the surroundings of lake Dus-Khol (Svatikovo) of the Republic of Tyva

The article reveals a number of features of the synanthropization of the flora in the vicinity of Lake Dus-Khol in the conditions of recreational activities. It has been established that the level of synanthropization of the flora of the surroundings of the lake varies from low in the zone of active development (8.6%) to medium in the zone of rest (16%). Eight plant species are noted, which are included in the list of invasive and potentially invasive species of Siberia, included in the Black Book of Siberian Flora.