THE BLOOM AND TOXICITY OF CYANOBACTERIA IN LAKE SEVAN

Authors

  • L.R. Hambaryan Chair of Ecology and Nature Protection, YSU, Armenia; $\\ $ Scientific Center of Zoology and Hydroecology, National Academy of Sciences, Armenia
  • L.G. Stepanyan Scientific Center of Zoology and Hydroecology, National Academy of Sciences, Armenia
  • M.V. Mikaelyan Institute of Biochemistry after H. Buniatyan, National Academy of Sciences, Armenia
  • Q.G. Gyurjyan Institute of Biochemistry after H. Buniatyan, National Academy of Sciences, Armenia

DOI:

https://doi.org/10.46991/PYSU:B/2020.54.2.168

Keywords:

Lake Sevan, algal bloom, cyanobacteria, cyanotoxins

Abstract

Seasonal hydrochemical, hydrophysical, and phytoplankton studies were conducted in a littoral zone of Lake Sevan in 2019. It is known that in recent years widespread algal blooms were usually started from the littoral zone of Big Sevan, and then spread towards the pelagic zone of the lake. The bloom was mainly caused by species belonging to the genus Dolichospermum (previously Anabaena). Our study has revealed that the physical and chemical properties of water were changed as a result of algal bloom. Particularly, the transparency of water and concentration of dissolved oxygen decreased, while the concentrations of ammonium, nitrite and phosphate ions increased. For the first time, the presence of the toxins microcystin and anatoxin-a was recorded in the lake.

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Published

2020-08-17

How to Cite

Hambaryan, L.R., L.G. Stepanyan, M.V. Mikaelyan, and Q.G. Gyurjyan. 2020. “THE BLOOM AND TOXICITY OF CYANOBACTERIA IN LAKE SEVAN”. Proceedings of the YSU B: Chemical and Biological Sciences 54 (2 (252):168-76. https://doi.org/10.46991/PYSU:B/2020.54.2.168.

Issue

Vol. 54 No. 2 (252) (2020)

Section

Biology

License

Copyright (c) 2020 Proceedings of the YSU

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.