Email this article Phytoplankton of Lake Bol’shie Shvakshty (Belarus) during the Shift of the Ecosystem from a Macrophyte–Weakly Eutrophic to a Phytoplankton–Hypereutrophic State
- Authors: Mikheyeva T.M.1, Adamovich B.V.1,2, Zhukova T.V.1, Savich I.V.1, Belykh O.I.3, Sorokovikova E.G.3, Kuzmin A.V.3, Fedorova G.A.3, Kovalevskaya R.Z.1, Selivonchik I.N.1,2, Dubko N.V.1, Luk’yanova E.V.1
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Affiliations:
- Belarusian State University
- Fish Industry Institute
- Limnological Institute, Siberian Branch
- Issue: Vol 11, No 6 (2018)
- Pages: 563-575
- Section: Article
- URL: https://journals.rcsi.science/1995-4255/article/view/202866
- DOI: https://doi.org/10.1134/S1995425518060057
- ID: 202866
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Abstract
Changes in the quantitative characteristics and functioning of phytoplankton in Lake Bol’shie Shvakshty have been assessed. The changes are evoked by the introduction of herbivorous fishes into the lake and the resulting disturbance of ecological balance in the ecosystem and the shift of the lake into a hypertrophic state from a weakly eutrophic state. Human interference has caused the cyanobacteria density (abundance) and biomass values in the overall phytoplankton composition to strongly exceed (3.5 × 109 cells/L and above 68 μg/L chlorophyll-а, respectively) the threshold value for safe recreational use of water bodies (20 million cells/L and 10 μg/L chlorophyll-а) established by the World Health Organization (WHO). The lake can be assigned to the third level of hazard to human health within the classification proposed by the WHO, as the cyanobacteria density is higher than 100 million cells/L and chlorophyll-а content is higher than 50 μg/L. MC-producing Microcystis species were identified among the cyanobacteria that has propagated in the lake in recent years, and five microcystin variants, including the highly toxic MC-LR, have been detected in the water.
About the authors
T. M. Mikheyeva
Belarusian State University
Author for correspondence.
Email: mikheyeva@tut.by
Belarus, Minsk, 220030
B. V. Adamovich
Belarusian State University; Fish Industry Institute
Email: mikheyeva@tut.by
Belarus, Minsk, 220030; Minsk, 220024
T. V. Zhukova
Belarusian State University
Email: mikheyeva@tut.by
Belarus, Minsk, 220030
I. V. Savich
Belarusian State University
Email: mikheyeva@tut.by
Belarus, Minsk, 220030
O. I. Belykh
Limnological Institute, Siberian Branch
Email: mikheyeva@tut.by
Russian Federation, Irkutsk, 664033
E. G. Sorokovikova
Limnological Institute, Siberian Branch
Email: mikheyeva@tut.by
Russian Federation, Irkutsk, 664033
A. V. Kuzmin
Limnological Institute, Siberian Branch
Email: mikheyeva@tut.by
Russian Federation, Irkutsk, 664033
G. A. Fedorova
Limnological Institute, Siberian Branch
Email: mikheyeva@tut.by
Russian Federation, Irkutsk, 664033
R. Z. Kovalevskaya
Belarusian State University
Email: mikheyeva@tut.by
Belarus, Minsk, 220030
I. N. Selivonchik
Belarusian State University; Fish Industry Institute
Email: mikheyeva@tut.by
Belarus, Minsk, 220030; Minsk, 220024
N. V. Dubko
Belarusian State University
Email: mikheyeva@tut.by
Belarus, Minsk, 220030
E. V. Luk’yanova
Belarusian State University
Email: mikheyeva@tut.by
Belarus, Minsk, 220030
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