BIOLOGIYA MORYA, 2013, Vol. 39, No. 2, pp. 98-105 |
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Seasonal dynamics of potentially toxic and harmful phytoplankton species in Novorossiysk Bay (Black Sea) Institute of Arid Zones, Southern Scientific Center, Russian Academy of Sciences, Rostov-on-Don 344006 E-mail: The seasonal dynamics of the taxonomic composition and abundance of potentially toxic and harmful phytoplankton species in Novorossiysk Bay were studied during the period of 2005-2007. The network of monitoring stations covered areas with various hydrological and hydrochemical characteristics, as well as ships' ballast water discharge sites, where biological invasions are most likely to occur. In all, 19 potentially toxic and harmful phytoplankton species with abundances reaching 3 million cells/liter were found. Diatoms (Pseudo-nitzschia) and dinoflagellates (Prorocentrum, Dinophysis, Scrippsiella, and Ceratium) were predominant. High abundance of diatoms (262 thousand cells/liter) and dinoflagellates (8.8 thousand cells/lilter) was observed every year in April-August. From September to March, representatives of these divisions were found in lower numbers, on an average 6 and 2.7 thousand cells/liter, respectively. High abundance of the prymnesiophyte Phaeocystis pouchetii (38 thousand cells/liter) was observed in the port area in April-August 2006. Key words: red tides, seasonal dynamics, toxic species, phytoplankton, Black Sea. |
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