Аңдатпа
The article considers the floral composition and transformation of the vegetation cover in the middlereaches of the Ili River (below the Kapchagai Reservoir). It is noted that in connection with the construction of the Kapchagai HPP on the Ili river, in its middle and lower reaches, huge ecological changes tookplace. It has fallen sharply the level of water in the river and its floodplain is no longer flooded resultingin a dried up all the small lakes along the river and groundwater levels fell. This led to a change in thesoil and vegetation cover. Gone reed, reed mace Kamysheva and thickets of small remnants can be foundonly on the islands and along the main channel of the river Ili. As a result of drying of mainly old-agedindividuals of trees and bushes, tugai thinned out. In the floodplain of the river, there were no formermeadows with hayfields. In their place, other plant groups appeared, consisting mainly of weedy species of plants. Currently, the transformation of vegetation cover and floristic composition is actively proceeding below the Kapchagai HPP. Considering this, the authors propose to constantly monitor the state offlora and vegetation here, and thereby keep the ecological situation below the Kapchagai hydroelectricpower plant under control. Article considers the floral composition and transformation of the vegetationcover in the middle reaches of the Ili River (below the Kapchagai Reservoir). It is noted that in connection with the construction of the Kapchagai HPP on the Ili River, in its middle and lower reaches, hugeecological changes took place. The water level in the river has sharply dropped, its floodplain has ceasedto be flooded, as a result of which all small lakes along the river withered and the level of groundwaterdropped. This led to a change in the soil and vegetation cover. The reed, reed and corn cobs disappeared, their small remains can be found only on the islands and along the main riverbed of the Ili River.Tugai disappeared as a result of the drying up of predominantly age-old individuals of trees and shrubs.In the floodplain of the river, there were no former meadows with hayfields. In their place, other plantgroups appeared, consisting mainly of weedy species of plants. Currently, the transformation of vegetation cover and floristic composition is actively proceeding below the Kapchagai HPP. KapchagayskayaHPP constantly monitor the vegetation and thereby keep under control an ecological stop.Key words: phytocenosis, flora, population, ecotope, relic, endem.