Features of the dynamics of the areas of adventitious flora species of the Lower Volga region in connection with changes in natural and anthropogenic ecosystems of the region

Species of zonal ecological-floristic complexes are dispersed by land transport along highways and railways. The introduction of adventitious species into zonal phytocenoses increases from northwest to southeast and demonstrates a tendency toward an expansion of the number of biotopes. Adventitious species of azonal and extrazonal ecological-phytocenotic groups form habitats along river valleys. A significant group of species is associated with populated areas and industrial zones. The increase in the number of discoveries of adventitious species in recent years indicates an increasing rate of naturalization.