Northern expansion of Cylindrospermopsis raciborskii (Nostocales, Cyanoprokaryota) observed in shallow highly eutrophic Lake Nero (Russia)
Babanazarova O.V. 1, Sidelev S.I. 1, Fastner J. 2- 1P.G. Demidov Yaroslavl State University, Dept. of ecology and zoology,
- 9, Prosp. Matrosova, 150057 Yaroslavl, Russia
- 2Federal Environ. Agency, Sect. II, Water treatment and resource protect.,
- 1, Corrensplatz, 14195 Berlin, Germany
The emergence and mass development of fresh-water planktonic Cylindrospermopsis raciborskii (Wołosz) Seenayya et Subba Raju in northern latitudes (57o N) in the hightrophic Lake Nero (The Yaroslavl Region, Russia) were described. This population is close to that of India and France by forms of trichom and the sizes of a geterotsist. The absence of akinetes during mass development makes it similar to populations of pantropics and shows high ecological and geographical plasticity. It is able to produce cyanotoxins. Trace quantities of dissolved cylindrospermopsin were detected using liquid chromatography/ tandem mass spectrometry. The abundance peak (30.5–23.3% of a total number and biomass of phytoplankton respectively) was short and occurred during a blocking anticyclone in August 2010. The hypothesis of advancing this species to the northern part of the geosphere according to the process of global warming is confirmed. Low transparency, water level, high biogenic load, mineralization, water resistant time and throphic level produce favourable conditions for invasion species. There is a serious threat for emerging toxic populations of algae in reservoirs of a moderate zone.
Keywords: Cylindrospermopsis raciborskii, expansion, Lake Nero, cylindrospermopsin, invasion
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