TO THE QUESTION OF DISTRIBUTION AND ECOLOGICAL AND BIOLOGICAL CHARACTERISTICS OF REPRESENTATIVES OF THE GENUS REYNOUTRIA HOUTT. IN THE BRYANSK REGION

Long-term studies were carried out within the framework of organized biomonitoring of alien species in the territory of the old developed region, since invasive species of the genus Reynoutria Houtt. pose a threat to communities and economic security due to their high regeneration potential. Three species of the genus Reynoutria have been noted in the Bryansk region: R. japonica Houtt., R. bohemica Chrtek et Chrjova (R.× bohemica) and R. sachalinensis (Fr. Schmidt ex Maxim.) Nakai. A significant part of the reinoutria finds belong to R.× bohemica. It has been established that representatives of the genus are widespread in various habitats and mainly in all areas of the region. Species of the genus Reynoutria in the Bryansk region are assigned to status 4 (alien species, naturalize in disturbed, semi-natural and natural habitats), have the properties of an edificator. Ecological-coenotic strategy: shows signs of a competitor, violent, Reynoutria disperses by vegetative spread with the help of rhizomes or fragments of shoots. Derivative communities with Reynoutria (Reynoutria [Convulvuletalia sepium]) belong to the class Galio-Urticetea Passarge ex Kopecký 1969, they are often found in ruderal habitats, with fluctuations on lawns and plantings. Communities persist for a long time, their development requires from 4 to 8 years. Representatives of the genus Reynoutria secrete growth inhibitors – colines, which is proven by studying the allelopathic activity of plants. Low abundance of herbaceous and shrub species, unsatisfactory natural regeneration of plants in communities with Reynoutria is determined not only by the lack of illumination, but also by the biochemical suppression of plants by highly active species. Keywords:.