Diatom complexes in modern bottom sediments of lakes of the Central Tunguska plateau, Evenkia
G. N. Bolobanshchikova1, O. V. Palagushkina2, D. Yu. Rogozin1,3
1Federal Research Center “Krasnoyarsk science Center” Siberian Branch of the Russian Academy of Sciences (KSC SB RAS, FRC KSC SB RAS) “Institute of Biophysics Siberian Branch of Russian Academy of Science” (IBP SB RAS), Krasnoyarsk, Russia
2Kazan (Volga Region) Federal University, Kazan, Russia
3Siberian Federal University, Krasnoyarsk, Russia
Keywords: diatoms, bottom sediments, fossil, Evenkia, Aneumastus tusculus
Abstract
For the first time the diatom complexes were investigated in the upper part of bottom sediments in the freshwater lakes Cheko and Zapovednoye, located in the taiga zone of the south of Evenkia on the territory of the Tungussky state reserve. There were found and identified 156 diatom taxa in two lakes, and their ecological preferences have been determinate. In the Lake Cheko the valves of Aneumastus tusculus (Ehrenberg) D. G. Mann & A. J. Stickle was identified - this diatom officially described as a fossil. In the both lakes the similarities and differences in the diatom complexes have been revealed - it seems that the diatom complex of both lakes is similar to that for freshwater bodies of the world located at close latitudes in the taiga zone. Lake Cheko is distinguished by a smaller proportion of planktonic species, which is probably due to the greater flow of this lake. Also there is shown the dependence of the species composition of diatoms on the meteorological parameters of the environment (temperature and precipitation).
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