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Ribogospod. nauka Ukr., 2018; 1(43): 15-25 
DOI: https://doi.org/10.15407/fsu2018.01.015 
УДК 574.583:591.524.12(282.247.325.8)

Structural-functional organization of the littoral zooplankton communities of the Kremenchutskiy reservoir

Z. Burian, This email address is being protected from spambots. You need JavaScript enabled to view it. , ESC "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv, Kyiv
V. Gandziura, This email address is being protected from spambots. You need JavaScript enabled to view it. , ESC "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv, Kyiv
V. Trokhymets, This email address is being protected from spambots. You need JavaScript enabled to view it. , ESC "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv, Kyiv

Purpose. To find out the present state of the structural and functional organization of the littoral zooplankton communities of the upper Kremenchuk reservoir in the area of ​​the Kaniv Nature Reserve.

Methodology. The material was collected in the summer time of 2016 at six stations of the littoral zone of the upper Kremenchug reservoir. The collection and analysis were carried out using generally accepted methods. The objects of the research were representatives of three main groups of zooplankton (rotifers, cladocerans, copepods), as well as ostracods and larvae of bivalve molluscs. Statistical data processing was done in MS Excel 2013.

Findings. The results of the study represent the present state and organisation of littoral zooplankton. The species richness of the littoral zooplankton of the upper Kremenchug reservoir was presented by 48 species. There are 20 species of monogonont rotifers, 18 cladocerans species and copepods – 10. The representatives of the rotifer-cladoceran complex dominated in the taxonomic composition that can be explained by the preservation of the river regime and the rheophilic conditions in this part of the reservoir. The analysis showed that according to the ecological spectrum of zooplankton groups, the representatives of the pelagic group dominated – 47.92%. As for the feeding type, the largest share was represented by the non-predatory group – 64.58%. After analyzing of the quantitative indices (density and biomass) of zooplankton, it was found that they were lower than average for overgrown biotopes (112580 ± 129914 ind./m³ і 1.83 ± 2.07 g/m³) and low for open water (26160 ± 19161 ind./m³ і 0,82 ± 0,86 g/m³).

Originality. The present state of structural and functional organization of the littoral zooplankton communities of the upper Kremenchug reservoir has been revealed.

Practical significance. The conducted studies give the information about the structural and functional organization of the littoral zooplankton groups of the upper Kremenchug reservoir in the Kaniv Nature Reserve region that allows predicting further changes in zooplankton communities, assessment of the ecosystem and the calculation of the natural feed supply for juvenile fish.

Keywords: structural and functional organization, group, littoral zooplankton, Kremenchug reservoir, Kaniv Nature Reserve, Ukraine.

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