Comparative study of the Bolshezemelskaya tundra central part watershed lakes fauna diversity

Studies of the fauna of the watershed glacial lakes in the central part of the Bolshezemelskaya tundra have been carried out. A comparative analysis of the zooplankton, zoobenthos and fish diversity and structure from the More-Yu and the Adzva river basins is given. The More-Yu River flows directly into the Barents Sea, and the Adzva River is the Pechora River tributary of the second order. 78 taxa of planktonic organisms were identified, including 61 species, one subspecies, and 16 taxa designated to the rank above the species. The zoobenthos in the lakes of the More-Yu River basin includes 28 groups of invertebrates, and 20 groups in the watershed of the Adzva River. The composition of the fauna of zooplankton and benthic invertebrates has significant similarities in the watershed of the Adzva and More-Yu rivers, which is due to the common physical and geographical conditions. Compared to fish, invertebrates have certain strategic opportunities to overcome intracontinental geographical barriers. Fish are unable to spread across watersheds from one aquatic system to another, having fundamentally different mechanisms of fauna formation than invertebrates. The fish population of the studied watershed lakes includes 15 species, 10 of which are in the More-Yu River basin, and all 15 78 Теорeтическая и прикладная экология. 2026. № 1 / Theoretical and Applied Ecology. 2026. No. 1 species are in the Adzva River catchment area. There are no boreal lowland fish species in the More-Yu River basin, in particular Leuciscus idus, Rutilus rutilus, and Perca fluviatilis. It is suggested that the revealed absence of the above is not so much due to climatic conditions as to the history of glaciations and the presence of watershed barriers between the More-Yu River basin and the tundra tributaries of the Usa River.

Перевод пока недоступен