Экология

The substrate spectrum of hydrocarbon-oxidizing bacteria isolated from the soils of the Saratov region was studied: the soils of Balakovo (chronic anthropogenic pollution) and agricultural soils of Novokrivovka village (single hydrocarbon pollution). It was found that the microorganisms isolated from the urban soils of Balakovo, being under constant anthropogenic infl uence, had a wider substrate spectrum. It was revealed that 4 microorganisms isolated from the urban soils of Balakovo: Acinetobacter lwoffi i R44, Bacillus circulans E75, B.

Studying the development of such an important group as cyanobacteria is an integral part of environmental monitoring of the Volga-Caspian region. Based on long-term data, a comparative description of the current state of the group of cyanobacteria of the Volga-Caspian region is indicated. The degree of similarity of marine and river species of the group of cyanobacteria for sections of the Volga River, Northern and Middle Caspian Sea was determined.

Central Russia is traditionally the most important area of crop production and agriculture. The purpose of this study was the ecological and hygienic study of the accumulation of heavy metals and arsenic, as well as biologically active substances in the aboveground part of bitter wormwood (Artemisia absinthium L.), harvested in urbocenoses of Central Russia.

During fi ve years of research (2017–2020 and 2022), 257 fruiting bodies of 34 species of basidiomycetes from the orders Agaricales and Polyporales, Hymenochaetales, Boletaceae, Russulales and Gloeophyllales were collected in diff erent areas of the Saratov region. 108 species of Coleoptera from 24 families were identifi ed that are directly and/or indirectly associated with the fruiting bodies of fungi. The highest species diversity was noted in the families Staphylinidae – 37 species, Tenebrionidae – 11, Ciidae – 10, Erotylidae and Mycetophagidae – 6 species each.

The article provides information on the current status of populations of 29 plant species from the Orchidaceae family in the south of the Middle Volga region (within the Penza, Samara and Ulyanovsk regions) from Annex II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES): Cephalanthera longifolia (L.) Fritsch, Cephalanthera rubra (L.) Rich., Corallorhiza trifida Chatel., Cypripedium calceolus L., Cypripedium guttatum Sw., Cypripedium macranthos Sw., Cypripedium ventricosum Sw., Dactylorhiza fuchsii (Druce) Soo, Dactylorhiza in

The basis for the article was entomological collections from the nests of the sand martins (Riparia riparia (Linnaeus, 1758)) collected in the Saratov oblast in 2019–2022. A total of 12 colonies were examined in the Voskresensky, Krasnoarmeysky, Lysogorsky, Rivne, Engelssky and Khvalynsky districts of the Saratov oblast, as well as in the city of Saratov. Gamasid mites were collected using a Tullgren funnel for two to three hours and then identifi ed. In each of the studied colonies, a soil section was laid and its morphological description was carried out.