<i>THLADIANTHA DUBIA </i>BUNGE IN THE BRYANSK OBLAST: DISTRIBUTION, ECOLOGY, BIOCHEMICAL CHARACTERISTICS
Thladiantha dubia Bunge is an East Asian species, a perennial herbaceous climbing vine, which naturally grows in the Russian Far East, Northeast China and Korean Peninsula. In Central Europe, North America, South America (Ecuador) and Japan it is an alien species. In most European countries Th. dubia is not an invasive plant. In the European part of Russia Th. dubia is bred as an ornamental plant, and is found in a variety of disturbed habitats. In some regions of Russia it has an invasive status. The distribution of Th. dubia in the Bryansk Oblast was studied using grid mapping. The species was observed in 69 of 223 examined squares (30.94%). Th. dubia occurs in disturbed habitats, wastelands, and housing. We have discovered and studied communities dominated by Th. dubia . In the anthropogenic habitats the species forms monodominant resistant communities. Based on the analysis of geobotanical descriptions of the communities, we established the association Thladianthetum dubiae ass. nov. The formation of a monodominant community is possible due to vegetative propagation and decrease in the illumination of the soil cover. Th. dubia secretes colins - growth inhibitors. Presumably, an invasion vector of Th. dubia is anthropochoria. In the territory of the Bryansk Oblast Th. dubia is a potentially invasive species. Biomass of this plant is characterized by a good absorption capacity of some heavy metals and can be used as a soil remediator.