Structure of estuarine algocoenoses of the barents sea under the conditions of anomalous ice formation |
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| Authors: | P R Makarevich |
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| Institution: | (1) Murmansk Marine Biological Institute, Kola Scientific Center, Russian Academy of Sciences, Murmansk, Russia |
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| Abstract: | The paper presents the results of studies of seasonal trends in the development of phytoplankton and algae inhabiting one-year ice under the conditions of anomalous hydrometeorological processes that cause freezing of the Kola Bay estuarine zone (Barents Sea). In the years of anomalous ice formation, no changes were observed in the species composition and quantitative characteristics of the plankton algocoenosis, as well as in the time of the phytoplankton vegetation. Meanwhile, it was found that the pelagic community reaches its maximal abundance and biomass later than under normal conditions. The data obtained suggest that, in selected years, the community of ice algae has not enough time to reach its maximal abundance, which is related to the rapid degradation of the ice cover at the beginning of the spring. Therefore, the representatives of the cryoflora proper do not contribute much to the total annual biomass of the phytoplankton of the estuarine pelagic ecosystem of Kola Bay. |
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