Des­cription of Phytoplankton from the Bolshoy Cheremshan River (Kuybyshev Reservoir)

O.G. Gorokhova

Institute of Ecology of the Volga River Basin, Russian Academy of Sciences, Togliatti, 445003 Russia

E-mail: o.gorokhova@yandex.ru

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Abstract

The results of the study (2012) of phytoplankton from the Bolshoy Cheremshan River, a tributary of the Kuybyshev Reservoir, have been considered. A total of 147 species of 8 divisions have been revealed. The highest species diversity and abundance have been observed in Bacillariophyta and Chlorophyta. The structure of algocenoses has been found to be dominated by small-celled centric diatoms, green chlorococcales, and cryptomonads. All species identified in this study are characteristic of eutrophic waters. According to the saprobic indices, the studied river belongs to β-mesosaprobic zone. Data clustering by comparing the composition of dominant phytoplankton species has made it possible to spot differences between the river reaches. The influence of human settlements on the structure of planktonic algocenoses has been discovered.

Keywords: phytoplankton, taxonomic structure, Bolshoy Cheremshan River

Acknowledgments. The author is grateful to E.M. Kurina (Candidate of Biology, Laboratory of Small River Ecology) for kindly providing us with hydrological data.

Figure captions

Fig. 1. Schematic location of stations in the Bolshoy Cheremshan River, where samples were taken in 2012.

Fig. 2. The abundance (N) and biomass (B) of algal divisions at the stations in the Bolshoy Cheremsan River. Designations: 1 – near the village of Klyavlino, 2 – near the village of Cheremshan, 3 – near the village of Burmet'evo, 4 – the riverbed near the village of Chulpanovo, 4a – shallow waters near the village of Chulpanovo, 5 – the riverbed near the village of St. Maksimkino, 5a – shallow waters near the village of St. Maksimkino, 6 – the riverbed near the village of Novocheremshansk, 6a – shallow waters near the village of Novocheremshansk, 7 – the riverbed about 30 km away from the city of Dimitrovgrad, 7a – shallow waters about 30 km away from the city of Dimitrovgrad, 8 – the riverbed about 10 km away from the city of Dimitrovgrad, 8a – shallow waters about 10 km away from the city of Dimitrovgrad.

Fig. 3. Dendrogram of taxonomic similarity between the dominant algal plankton species at the riverbed stations in the B. Cheremshan River.

Fig. 4. Saprobic indices and abundance of the groups of saprobes at the stations laid in the B. Cheremshan River. An asterisk marks species without indicator importance.

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For citation: Gorokhova O.G. Des­cription of phytoplankton from the Bolshoy Cheremshan River (Kuybyshev Reservoir). Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2016, vol. 158, no. 2, pp. 247–258. (In Russian)


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