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• W2116514246 abstract "UDC 57.045 FLUCTUATING ASYMMETRY OF BETULA PENDULA LEAVES AS A BIOINDICATOR OF AEROTECHNOGENIC POLLUTION OF AGROLANDSCAPES Lobkov V.T., Doctor of Agricultural Sciences, Professor Vetrova J.V., Post-graduate student Orel State Agrarian University, Orel City, Russia E-mail: agro-decanat@orelsau.ru ABSTRACT The main goal of our research was to determine the variability model and fluctuating asymmetry indices of the metric signs of Betula pendula as a typical species which grow uniformly in the Orel region and Orel.The following problems were solved:to collect material in the planting of silver birch in two areas;to determine the parameters of Betula pendula leaf blade and the level of its asymmetry; to explore the basic statistical properties of the asymmetry parameters of the individual features characterizing the asymmetry of the whole object;to substantiate the use of Betula pendula in urban ecosystems for gardening and landscaping. The estimation of the changes of developmental stability Betula pendula in biotopes with different levels of anthropogenic impact is carried out. The character of the fluctuating asymmetry of Betula pendula place in the Orel region and Orel, in areas with weak and strong anthropogenic impact, has been studied. Found that the deterioration of the ecological state of urban environment does not determine the reduction of the population development stability of Betula pendula and can testify to its tolerance to environmental contamination. KEY WORDS Betula pendula; Industrial pollution; Development stability; Fluctuating asymmetry. Currently, the dominant factor causing soil degradation and air pollution in agricultural landscapes is technogenic contamination from industry, transport and other forms of human activity [1].The most dangerous and intense source of urban air pollution is road transport [2], in the emissions of which about 300 harmful substances is found, including particularly dangerous carbon oxides, hydrocarbons (carcinogenic benzopyrene and benzanthracene, formaldehyde, benzene), nitrogen oxides, soot, lead, mercury, sulfur dioxide, aldehydes [3,4]. In this connection special importance have researches, aimed at studying the effects of environmental pollution on the plant component of ecosystems.For this purpose, the methods of phytoindicationtechnogenic pollution are widely used.One of these methods, which have gained wide popularity, is the definition of fluctuating asymmetry as an integral indicator of environmental quality [5]. Under the fluctuating asymmetry (FA) understand the independent change of bilateral characteristics of the organism.Found that the phenomenon of fluctuating asymmetry is connected with violation of organism development stability as a result of external factors, first of all - anthropogenic [6].The degree of FA expressiveness depends on the force of factor impact, the greater the factor impact, the greater the deviation from the norm has an index of FA [7], this dependence allowing at the macroscopic level to use it as a measure in evaluating the stability of organism development [8].Consequently, the stability of development, estimated by the level of FA is a sensitive indicator of the state of natural populations [9, 10]. Thus, the determination of the environmental contamination impact on the rate of fluctuating asymmetry of Betula pendula leaf lamina was the purpose of our study. MATERIALS AND METHODS The objects of the study were birch trees (Betula pendula) which growing in s. Ivanovka of Orel region, located at a considerable distance from technogenic sources of pollution," @default.
• W2116514246 created "2016-06-24" @default.
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• W2116514246 date "2014-01-01" @default.
• W2116514246 modified "2023-09-26" @default.
• W2116514246 title "FLUCTUATING ASYMMETRY OF BETULA PENDULA LEAVES AS A BIOINDICATOR OF AEROTECHNOGENIC POLLUTION OF AGROLANDSCAPES" @default.
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