Ecological Systems and Devices Annotation << Back THE GEOECOLOGICAL EVALUATION OF URBAN AREAS BIOINDICATING METHOD (FOR EXAMPLE VORONEZH) M.A. Klevtsova, P.M. Vinogradov The article presents the results of evaluation of fl uctuating asymmetry of the leaf blade of two species of woody plants: Populus pyramidalis and Betula pendula Roth., which grow in different functional areas of Voronezh. A change in the indicators of asymmetry of morphological features and the integral value of leaf fl uctuating asymmetry, due to the infl uence of stress factors of the urban environment. Integrated indicator of asymmetry in Populus pyramidalis ranges from 0.052 to 0.114, in Betula pendula Roth. – from 0.003 to 0.115. Measurement accuracy – suffi cient (criterion of representativeness Rr≤5 %). In the industrial and transport areas marked growth rates fl uctuating asymmetry that constitutes a violation of the stability of woody plants. The total distribution of the fl uctuating asymmetry as a phenomenon characteristic of the study area is described by the equation of a polynomial curve. Bioindicating used method to evaluate the combined effect of pollutants on living organisms and is of great importance in environmental monitoring. The results of the study mapped the distribution of the magnitude of fl uctuating asymmetry in the city. Keywords: bioindication; fl uctuating asymmetry; developmental stability; stress; morphological markers; urban environmen; tree species. Contacts: E-mail: schtrek3@mail.ru Pp. 03-13.