Izvestiya of Saratov University.
Chemistry. Biology. Ecology
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

почвы

The substrate spectrum of native hydrocarbon-oxidizing bacteria isolated from soils with diff erent levels of anthropogenic impact

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.

Fauna and biotope distribution of mites (Acari: Mesostigmata) from nest of the sand martin (Riparia riparia (Linnaeus, 1758)) in the territory of the Saratov oblast

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.

Фауна и биотопическое распределение гамазовых клещей (Acari: Mesostigmata), из гнезд береговой ласточки (Riparia riparia (Linnaeus, 1758)) на территории Саратовской области

В результате проведённых исследований фауны гамазовых клещей в гнёздах береговой ласточки (Riparia riparia (Linnaeus, 1758)) территории Саратовской области был выявлен 21 вид гамазид из 10 семейств. Наибольшей численностью и видовым разнообразием характеризуются колонии, расположенные в чернозёме остаточно-карбонатном на известняке, наименьшее в колонии расположенной в темно-каштановой на песке. Доминантную группировку составляют 3 вида: Androlaelaps casalis (Berlese, 1887), Stratiolaelaps miles (Berlese, 1892) и Hypoaspisella lubrica (Oudemans & Voigts, 1904).