Abstract
The article presents an assessment and analysis of the ecological state of atmospheric air in 7 districts of the city of Gryazi, Lipetsk region, by the method of lichen-indication. In most of the studied areas, a tendency to degradation of epiphytic lichenoflora was revealed as the anthropogenic impact increased, which was expressed in the depletion of the species composition and a decrease in the area of the projective cover of lichens. The index of atmospheric purity IAQ in areas of the study varies significantly, which is associated with a different degree of anthropogenic load. The highest index of atmospheric purity IAQ was recorded in the Oak Grove district, the lowest, in the area of Borisoglebskaya and Astrakhan streets, and the average index was typical for the rest of the district. The result obtained can be used as a basis for biomonitoring the territory of the city of Mud.
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