Аңдатпа
The species diversity and quantitative participation of the dominant species of black alder forests of the Kostanai region (Northern Torgai) are summarized in four plant associations. Associations: Thelypterio-Equiseto-Violosum-Alnetum; Athyrio-Alnetum; Urticosum-Alnetum и Matteuccio struthiopteri-Alnetum glutinosae. The distinguished associations or conassociations of black alder forests quite clearly differ in environmental conditions and in the presence of a group of differential species characterizing the stability of price ecosystems.