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

Саратов

Urban mallard population (Anas platyrhynchos) in Saratov: Wintering, nesting, degree of synanthropization

The article refl ects data on year-round studies of the urban mallard population in Saratov, allowing the assessment of the condition and the study of the factors infl uencing its formation. An estimate of the mallard population in the winter periods of 2020–2023 is presented. It is shown that the number negatively correlates with frosts and precipitation, and there is a statistically signifi cant positive relationship between the number of people feeding ducks and the number of mallards.

Городская популяция кряквы (Anas platyrhynchos)в Саратове: зимовка, гнездование, степень синантропизации

В статье отражены данные по круглогодичным исследованиям городской популяции кряквы в Саратове, позволяющие оценить состояние и изучить факторы, влияющие на ее формирование. Представлена оценка численности популяции кряквы в зимние периоды 2020-2023 гг. Показано, что численность отрицательно коррелирует с морозами и осадками, а между количеством людей, подкармливающих уток и численностью крякв имеется статистически значимая положительная связь.

Epiphytic Lichens of Natural Park “Kumysnaya Polyana”

The article provides information about the epiphytic lichen flora of the Natural Park “Kumysnaya Polyana” (NP), which is located in Saratov. It is a regional SPNA (Special Protected Natural Area). The researches were conducted in forest communities of NP in 2011–2016. Standard techniques were used in the collection and identification of lichens. An index of species specificity of lichens for forophytes was calculated. An annotated list consists of 37 species and includes the information about their preferential forophytes.