Biological sciences RESEARCH OF FLUORINE BIOGEOCHEMISTRY IN THE ECOSYSTEM COMPONENTS 5-23 THE CHARACTERISTICS OF THE ECOSYSTEM COMPONENTS OF TAMBOV PLAIN AND THEIR ELEMENTAL COMPOSITION 24-35 PROBLEM OF LAND RECULTIVATION DISTURBED DURING COAL MINING 36-46 MANIFESTATION OF VIRAL EPIZOOTICS IN PIERIS BRASSICAE L. DEPENDING ON THE TEMPERATURE OF ENVIRONMENTAL CONDITIONS IN SOUTH KAZAKHSTAN REGION 47-48 THE ASH-LEAVED MAPLE IN URBAN FORESTS OF MOSCOW 49-50 HABITATS OF HUNTING MAMMALS: ASPECT OF ALLOCATION IN DIFFERENT POPULATED TERRITORIES 51-64