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Kreneva K., Filatova T., Kleschenkov A., Korshun A. Change of hydrogen-hydrochemical conditions of Azov sea Taganrog gulf and their influence on microzoplankton in winter period / annotation

Katerina V. Kreneva – candidate of biological studies. Federal Research Center of the Southern Scientific Center of the Russian Academy of Sciences. Rostov-on-Don, Russia. Federation.
Tatyana B. Filatova – scientific worker. Southern scientific center of Russian Academy of Science. Rostov-on-Don, Russian Federation.
Alexey V. Kleschenkov – candidate of geology, head of the department. Southern scientific center of Russian Academy of Science. Rostov-on-Don, Russian Federation.
Anna M. Korshun – candidate of geographical studies, assistant professor. North Caucasian branch of the Moscow technical university of communications and Informatics. Rostov-on-Don, Russian Federation.

An attempt is made to generalize the hydrochemical and hydrobiological results, obtained by the Southern Scientific Center of RAS and the Institute of Arid Zones of the SSC RAS in the study of the Taganrog Gulf waters in the winter of 2006-2017, and the distribution of hydrochemical components in snow, ice and under-ice water, the long-term changes in the salinity of the Taganrog Gulf are traced in detail according to two points of the observation, which is of theoretical and practical importance in predicting the hydrochemical regime, possible structural changes in the hydrobiocenosis and water quality of the water bodies. The stations most widely provided with data on the content of nutrients (nitrites, nitrates, ammonium nitrogen, dissolved nitrogen, nitrogen, phosphate, dissolved phosphorus, phosphorus, silicic acid) were compared. It is concluded that an increase in the salinity of the Azov Sea waters causes a steady trend of a decrease in the level of qualitative and quantitative characteristics of the Taganrog Gulf microzooplankton community, changes are observed in the dominant complex of ciliatocenosis species. The decrease in the species richness of microzooplankton is mainly due to freshwater and marine species. This process is probably associated with a negative effect of salinity on the primary production of organic matter and is part of a cycle of long-period fluctuations in salinity of the Azov Sea.

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