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7456228 
Journal Article 
Toxic cyanobacteria and their metabolites in the lakes of the Russian Northwest 
Voyakina, EJ; Russkikh, IV; Chernova, EN; Zhakovskaya, ZA 
2020 
Publishing House "O- Kratkoe" 
2020 
1 
124-129 
Russian 
In recent decades, cyanobacterial blooms have also been reported from water bodies located in the Northwest of Russia. For the first time in Russia, in one study, data were obtained on the distribution of cyanobacteria and the composition and concentration of cyanotoxins in a number of eutrophic water bodies in Northwest of Russia. The active vegetation of cyanobacteria was noted in these water bodies. The study of the toxin determination has been carried out using method of high-performance liquid chromatography - tandem mass-spectrometry on LTQ OrbiTrap instrument ("Finnigan") with linear and orbital traps in the electrospray-ionization (ESI+). The characteristic mass-spectra of analytes have been registered using high-resolution mass-spectrometry and tandem mass-spectrometry. Two eutrophic lakes (Lake Sestroretskiy Razliv and Lake Suzdalskoe) were investigated in the warm period from June to September of 2008-2018. The important contribution to the phytoplankton was made by cyanobacteria (more than 90% of total abundance). Aphanizomenon flosaquae (L.) Ralf et Born et Flah., Planktothrix agardhii (Gom.) Anagn.et Kom., species of Microcystis (M. aeruginosa (Kütz.) Kütz., M. wesenbergii Kom., M. viridis (A. Br.) Lemm.) were dominated in plankton during the period of investigation. Maximum concentration of microcystins (8.2 mkg/L) was noted in middle of July 2014 in Lake Sestroretskiy Razliv. Maximum concentration of anatoxin-a (1.7 mkg/L) was also marked in July 2014 in Lake Suzdalskoe. Data were obtained on the production of toxoid in the Gulf of Finland by the species Aphanizomenon flos-aquae, which is often dominant and non-toxic in the Baltic Sea. For the first time in Russia, species-producers of microcystins in the Gulf of Finland were identified. The presence of toxic types of cyanobacteria was established in the Peipsi Lake (Pskovsko-Chudskoe) in some reservoirs of the European North of Russia, and the presence of microcystins was detected. © 2020 Publishing House "O- Kratkoe". All rights reserved. 
Algocenoses; Cyanobacteria; Cyanotoxins; Dominant species; Eutrophic water bodies; Mass spectrometry 
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