Armine Mamyan

National Academy of Sciences of Armenia | NAS RA · Scientific Center of Zoology and Hydroecology

High-altitude freshwater lakes are experiencing ever-increasing risk of harmful algal blooms (HABs) on the face of climate change and a growing demand on agricultural production. The biggest alpine lake of the Caucasus, Lake Sevan, has “blooming” recently almost every year. Thus, the study of phytoplankton community’ development patterns in Lake Se...

The phytoplankton dynamics in the Debed River, Armenia, was investigated. Water samples for phytoplankton quantitative and qualitative analyses were collected from 4 sites along the river once per season in April, July and September 2017. The results of the study have revealed the characteristics of the spatiotemporal distribution of phytoplankton...

https://link.springer.com/article/10.1134/S1062359021080161

The concentrations of some heavy metals (Fe, Zn, Mn, Cu, Mo, Pb, Cd) were measured in river waters, macrozoobenthos, and fish (Kura scrapers) from one of the most developed mining areas in Armenia, the Debed River catchment basin. In order to assess heavy metal contamination and its hydro-ecological and health effects, the macrozoobenthos quantitat...

Lake Sevan, Armenia, is the largest freshwater body in the Caucasus region. Cyanobacteria have become increasingly dominant in summer in Lake Sevan, reflecting the eutrophication of the lake and formed a massive bloom event in 2018. These recent observations mark the transition of this previously oligotrophic high mountain lake into a eutrophic lak...

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...

Phytoplankton quantitative and qualitative parameters in “Yerevanyan Lich” Reservoir and the Hrazdan River were investigated in April and June–August 2015. The results of the study showed that algal bloom registered in “Yerevanyan Lich” Reservoir in summer 2015 created new environmental conditions which led to significant changes in reservoir’s phy...

The current status of phytoplankton community in Lake Sevan (LS) was investigated. Water samples for phytoplankton and mineral phosphorus analyses were collected seasonally (spring–fall) in 2018. The results of the study showed that the unstabilized processes and nutrient pollution of the lake ecosystem led to bluegreen algae bloom in July. All of...

Phytoplankton quantitative and qualitative structure along the Voghji river situated in the southern part of Armenia was investigated in 2016 and 2017. The results of the study showed significant changes in the phytoplankton community of the Voghji river in ecologically vulnerable areas. The river passing through urban and mining areas was probably...

Phytoplankton quantitative and qualitative parameters in the Kachachkut, Alaverdi (Lalvar), Akhtala and Shnogh rivers of the Debed river catchment basin were investigated in 2017. Comparative analysis of the river phytoplankton composition of mining and non-mining areas showed comparatively low phytoplankton diversity in the Alaverdi, Akhtala and S...

Investigating the mechanisms behind the hydroecological effects of small hydropower plants (SHPs) operation is urgently required since increasing growth in the hydropower sector has become a serious threat to river ecosystems. The aim of the present study was to investigate and assess the hydrobiological and-chemical risks of SHPs operation in Arme...

Based on the results of many years of comprehensive research conducted by the Institute of Hydroecology and Ichthyology of the National Center of Zoology and hydroecology of the National Academy of Sciences of the Republic of Armenia, quantitative and qualitative indicators of water in the lake were studied as a necessary condition for the preventi...

Investigating the mechanisms behind the impact of heavy metal pollution on aquatic ecosystems is urgently required. Due to increasing growth in the mining sector, pollution has become a serious threat to water resources and aquatic biodiversity and is causing unfavorable environmental changes and human health hazards. The aim of the present study w...