A study of the horizontal and vertical distribution of phytoplankton in Lake Sevan was conductedin mid-July 2018 during the maximum Cyanoprokaryota blooms. The summer biomass of algae in the pelagiczone of the lake corresponded to values of mesatrophic waters. The Cyanoprokaryota biomass in Lake Sevanhas horizontal and vertical heterogeneity and is related to the depth, morphometry of the lake ... [Show full abstract] parts, distribu-tion of currents, transparency, temperature, and biomass of Cladocera. The specific number of phytoplank-ton species and water transparency decreases in areas where water blooms occur. The following factors con-tribute to the increase in the average phytoplankton biomass when compared to 2013–2017: (1) increasedwater temperature, (2) weakening of zooplankton grazing pressure due to the disappearance of Daphniamagna, and (3) increased phosphorus load due to increased contribution of D. longispina and Diaphanosomalacustris to the zooplankton biomass.
(PDF) Horizontal and Vertical Distribution of Phytoplankton in the Alpine Lake Sevan (Armenia) during the Summer Cyanoprokaryota Bloom. Available from: https://www.researchgate.net/publication/339982132_Horizontal_and_Vertical_Distribution_of_Phytoplankton_in_the_Alpine_Lake_Sevan_Armenia_during_the_Summer_Cyanoprokaryota_Bloom [accessed Mar 20 2020].