2021 Ecosystem Transformation 4 (3), 3–12
Nutrient enrichment and its effect on the phytoplankton community of Hrazdan River in the Yerevan District, Republic of Armenia
Lilit G. Stepanyan , Evelina Kh. Ghukasyan
DOI: https://doi.org/10.23859/estr-210329Volume: 4
Number: 3
Pages: 3–12
Received: 29.03.2021
Accepted: 27.05.2021
Available online: 17.08.2021
Published: 14.09.2021
ISSN 2619-094X Print
ISSN 2619-0931 Online
The phytoplankton community and nutrient enrichment of Hrazdan River have been studied in the Yerevan District, Republic of Armenia. Water was sampled in spring and summer of 2019. The content of phosphate, ammonium, and nitrite ions were significantly higher downstream of the Yerevan District compared to the stations located upstream. The latter were characterized by higher abundance of diatoms (Melosira varians and Rhoicosphenia curvata), while Oscillatoria limnetica, O. chlorina, and Anabaena sphaerica dominated downstream, reflecting different eutrophic state of the river parts.
Lilit G. Stepanyan
Institute of Hydroecology and Ichthyology of the Scientific Center of Zoology and Hydroecology, National Academy of Sciences of the Republic of Armenia
P. Sevak str. 7, Yerevan, 0014 Armenia
listeus@mail.ru
Evelina Kh. Ghukasyan
Institute of Hydroecology and Ichthyology of the Scientific Center of Zoology and Hydroecology, National Academy of Sciences of the Republic of Armenia, director of the institute
P. Sevak str. 7, Yerevan, 0014 Armenia
PhD in Biology
e_ghukasyan@yahoo.com
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Keywords: Hrazdan River, phytoplankton community, nutrient enrichment
For citation: Stepanyan, L.G., Ghukasyan, E.Kh., 2021. Nutrient enrichment and its effect on the phytoplankton community of Hrazdan River in the Yerevan District, Republic of Armenia. Ecosystem Transformation 4 (3), 3–12. https://doi.org/10.23859/estr-210329