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Hydrobiological Journal
SJR: 0.227 SNIP: 0.901 CiteScore™: 0.5

ISSN Imprimer: 0018-8166
ISSN En ligne: 1943-5991

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Hydrobiological Journal

DOI: 10.1615/HydrobJ.v52.i1.50
pages 49-61

Seasonal and Interannual Dynamics of Phytoplankton, Phytomicroepiphyton, and Nutrients Content in the River Section of the Kanev Reservoir

V. I. Shcherbak
Institute of Hydrobiology National Academy of Sciences of Ukraine Kyiv, Ukraine
V. M. Yakushin
Institute of Hydrobiology, National Academy of Sciences of Ukraine Kiev, Ukraine
A. M. Zadorozhnaya
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
N. Ye. Semenyuk
Institute of Hydrobiology, NAS of Ukraine, 12 Geroyiv Stalingrada Av., Kiev 04210, Ukraine
M. I. Linchuk
Institute of Hydrobiology National Academy of Sciences of Ukraine, Kiev, Ukraine


It has been found that in the river section of the Kanev Reservoir the intensity of phytoplankton and phytomicroepiphyton development distinctly varies from season to season, which is conditioned to a large extent by the content of inorganic forms of nitrogen and phosphorus in the water. At the same time, the content of inorganic nitrogen and phosphorus does not significantly vary from year to year, which is indicative of their stable content in the water of the Kanev Reservoir. It has been shown that N : P ratio essentially decreased as compared to the 1960−1970s. In this case, the minimal values of N : P ratio (6.6 ± 0.43) are registered in summertime, whereas its maximal values (32.3 ± 2.6) − in wintertime. Correlation was established between phytoplankton and phytomicroepiphyton indices of development and nutrients content. It is indicative of dynamic relationships in the "algal communities ↔ nutrients content" system.

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