DISTRIBUTION OF ICHTHIOFAUNA AND WATERBIRDS IN THE IRPIN RIVER BASIN WITHIN THE BOUNDARIES OF VARIOUS SURFACE WATER BODIES
DOI:
https://doi.org/10.31861/biosystems2026.01.094Keywords:
Irpin River, fish, avifauna, species of conservation concern, species richness, surface water bodiesAbstract
The research was carried out on the Irpin River and its tributaries (Dnipro River Basin). For this purpose, ichthyological and ornithological studies were conducted at 24 stations. Observations were conducted on various types of surface water bodies represented in the Irpin River Basin. It was established that the largest species richness of fish (30 species) is found within the large river massif. In contrast, from 5 to 24 fish species were registered within the remaining massifs. The largest number of species of conservation concern was registered within the large river massif in the lowland Leuciscus leuciscus, Alburnoides rossicus, Cobitis taenia, Misgurnus fossilis and Sabanejewia baltica. This is also confirmed by the highest level of taxonomic richness.
During the ornithological studies of the on water bodies and coastal zones , the presence of 31 species of waterfowl was established. The largest number of species was found in polygonal massifs of surface water (reservoirs). The largest number of species of conservation concern was registered in the flooded area (near the village of Demydiv). Within the boundaries of polygonal massifs of surface waters, the highest indicators of taxonomic diversity were recorded. This confirms the high level of effectiveness of the protection of the newly created biotopes. Within the massifs of a large river in the lowland, a medium river in the lowland, and a small river in the lowland and small river on a hill the species composition was 6-12; 5-9; 4-8 and 14 species, respectively. In the basin, we noted vulnerable species included in the Red Book of Ukraine: Alburnoides rossicus, Leuciscus leuciscus, Bucephala clangula, Mareca strepera, Podiceps auratus, as well as 13 species from Resolution 6 of the Bern Convention.
The obtained data on the distribution of biotic components within different types of massifs are important for identifying reserves, as well as for the formation of nature-oriented measures within the transformed ecosystems of the Irpin River basin and supplementing the existing classification of surface water bodies with new data.
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