Microplastics (MPs) contaminations of freshwater and marine environments has become a global issue. Lakes in southern Siberia provide a wide range of ecosystem services and are essential elements in the annual and interannual runoff distribution of the Great Siberian Rivers. However, the extent of their MPs pollution remains unknown. In this paper, for the first time, we analyze the concentrations, composition, and spatial distribution of MPs in six lakes in southern Siberia. The studied lakes are located both in the Altai mountains and the West Siberian plain. Some of them are significantly impacted by human activities, while others are located in protected areas with no permanent population. Nevertheless, MPs were detected in all of the studied lakes. MPs concentrations ranged from 4 to 26 MPs L⁻¹. Comparing with other inland lakes, South Siberian lakes presented moderate MPs concentrations. Among the registered MPs forms, fragments and films were dominant, with a size range between 31 and 60 nm. The MPs’ sources depend on local human activities (fishing, transport, landfilling). Therefore, sufficiently high concentrations were observed even in remote lakes. The present study set a baseline that emphasizes the need for increased attention to waste management and sustainable water use in Siberian freshwater environments.

The spatiotemporal dynamics of land covers of representative catchments of the Altai region (Altai Krai and Republic of Altai) was analyzed using remote sensing data and GIS techniques. The following...

Сравниваются материалы наблюдений за снежным покровом на метеостанциях и снегомерные наблюдения в водосборных бассейнах, где расположены эти станции. Исследования вели в трёх бассейнах на юге Западной Сибири: в лесостепном бассейне р. Касмала (2011-2020 гг.), низкогорном бассейне р. Майма (2015-2020 гг.) и степном бассейне р. Кучук (2019-2020 гг.). Сравнение проводилось на трёх пространственно-временных уровнях изменчивости: межгодовом (влияние межгодовой изменчивости осадков); внутрибассейновом (влияние рельефа и растительности); внутригодовом (влияние метеорологических условий конкретного зимнего периода).

ОСОБЕННОСТИ ПРОСТРАНСТВЕННОЙ ДИФФЕРЕНЦИАЦИИ СНЕЖНОГО ПОКРОВА В НИЗКОГОРНЫХ ЛАНДШАФТАХ РУССКОГО АЛТАЯ (НА ПРИМЕРЕ БАССЕЙНА Р. МАЙМА)