Gor Gevorgyan

Gor Gevorgyan
Scientific Center of Zoology and Hydroecology · Applied Hydroecology

PhD

About

64
Publications
8,253
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132
Citations
Citations since 2017
40 Research Items
124 Citations
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20172018201920202021202220230510152025
20172018201920202021202220230510152025
Introduction
Gor Gevorgyan currently works in the Scientific Center of Zoology and Hydroecology of NAS RA. Gor's main research area is aquatic ecology.

Publications

Publications (64)
Conference Paper
Cyber-physical systems (CPS) integrate the dynamics of the physical processes with those of the software and networking, to provide significant applications in critical infrastructure protection. One of the examples of the CPS is in Unmanned Aerial Surveillance Platforms (UASP), also known as drones, typically used for applications such as surveill...
Article
Full-text available
Heavy metals (HMs) remain persistent in soil for a long time and thus present a long-term threat of environmental pollution. In this study, the concentrations of some HMs (As, Cu, Zn, Pb, and Mo) in soil, potentially affected by the ex-operation of a metallurgical plant—specifically, a copper smelter in Alaverdi Town, northeastern Armenia—were meas...
Article
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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...
Article
Full-text available
Lake Sevan is the largest freshwater body in the Caucasus region, situated at an altitude of 1,900 m asl. While it is a major water resource in the whole region, Lake Sevan has received little attention in international limnological literature. Although recent studies pointed to algal blooms and negative impacts of climate change and eutrophication...
Chapter
The objective of this chapter is to evaluate assessment methodology of 2 one of the most basic parameters of water, termed as water quality, also defined 3 as Water Quality Index, in view of recent technological advancements. The chapter 4 focusses on drinking water only, however various other applications, such as in 5 agriculture, transportation a...
Article
Full-text available
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...
Article
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Hydrochemical investigations in the Hrazdan River, Armenia, were conducted. Water samples for pH, EC, K+, Ca2+, SO42-, Mg2+, Cr6+, Fe, and Zn analyses were taken from the river midstream in May and July 2019 and the downstream in June, August, and September 2020. The results of this study revealed the current hydrochemical status of the Hrazdan Riv...
Article
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Soil salinization processes in the agricultural lands of Masis region, Armenia, were investigated. Soil samples collected from these areas at the beginning (April) and end (October) of irrigation season in 2019 were analyzed for electrical conductivity as an indication of salinity. The results of the study demonstrated that irrigation caused an int...
Article
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The nocturnal vertical migration activity of amphipods in the two coastal areas of Lake Baikal, exposed and not exposed to the influence of artificial lighting was investigated. In the conditions of prolonged artificial lighting, the migration activity of amphipods reduced on average by 20 times. Statistical analysis demonstrated significant differ...
Article
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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...
Article
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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...
Article
Full-text available
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...
Article
Full-text available
A modern study of the Arpa River and its tributaries allows evaluating the ecological state of the ecosystem according to phytoplankton development indicators and comparing it with previous data. It is known that modified control of hydrosystems for hydropower stations changes quantitative and qualitative indicators of water, which increases anthro...
Article
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The development of river macrozoobenthos community in the Debed river catchment basin's mining areas was investigated in 2017. The results of the study showed significantly decreased quantitative parameters and diversity of benthic macroinvertebrates in the Alaverdi (Lalvar), Akhtala and Shnogh rivers being exposed to heavy metal pollution caused b...
Article
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The aim of the present study was the assessment of soil pollution by some potentially toxic trace elements in the environs of Akhtala Mining and Processing Enterprise and related environmental risks. The study was implemented in 2018. The level of soil contamination with trace elements was assessed by Enrichment factor (EF) that is widely used as a...
Article
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Ecological, agricultural and health risks of the soil pollution by potentially toxic elements (PTEs) (Cu, Pb, As, Ni, Zn, Co) in the vicinity of Shamlugh copper mining area located in the northeast of Armenia were investigated. The results of the study showed that the content of PTEs in the soils sampled in September 2014 may have posed serious ris...
Article
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Agricultural risks of mineral salt (Ca2+, Mg2+, K+, Na+, SO42- , Cl- , CO32- , HCO3- ) content in the water of the Voghji River catchment basin were assessed. Water sampling and hydrochemical analyses were implemented in July and September 2017. The results of the study showed that anthropogenic salt level in the Voghji River water site located dow...
Conference Paper
Conference Paper
Lake Sevan is situated in the eastern part of the Republic of Armenia (Gegharkunik Province). It is the largest lake in the South Caucasus and one of the greatest freshwater high mountain lakes of Eurasia. This high mountain unique water body in its natural state belonged to oligotrophic lakes. Historically, Lake Sevan was subjected to tragic event...
Conference Paper
Heavy metals (HMs) are considered major anthropogenic contaminants in aquatic ecosystems worldwide. Surface waters are most exposable to pollution due to their easy accessibility for the disposal of wastewaters. HMs entered in water can contribute to the degradation of aquatic ecosystems by reducing species diversity and abundance, and through the...
Conference Paper
It is well known that anthropogenic pollution by heavy metals causes one of the largest risks to the global environment (Li et al., 2015). Aquatic habitats, particularly the freshwater ecosystems, are more subjected to pollution than other environments, because of water use in industrial processes as well as discharge of effluents from industry and...
Article
Full-text available
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...
Conference Paper
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 in the Debed River catchment area located in the north of the Republic of Armenia has become a serious threat to water resources and aquatic biodiversity. The aim of the present...
Article
Full-text available
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...
Article
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Ecological and agricultural risks of heavy metal pollution of soils in risky areas around Kapan City (RA) were investigated. Soil samples were collected in June 2013 and analyzed for Cr, Mn, Ni, Cu, Zn, As, Mo, Cd, Pb, Co, Hg by the mass spectrometric method. The investigations showed that the soils around Kapan copper-molybdenum combine and Geghan...
Article
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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...
Article
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Sanitary-bacteriological state of the Arpa and its tributary-Yeghegis rivers was assessed based on the bacteriological parameters (aerobic, coliform and Escherichia coli (E. coli) bacteria). Water sampling for the quantitative analysis of aerobic, coliform and E. coli bacteria was performed seasonally in May, July and November of 2016. The results...
Conference Paper
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Article
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Incorrect policy of the management of Lake Sevan water resources led to a decrease in the lake water level by about 20 m during 1933-2001 and caused a serious threat of the lake degradation. Currently active measures to restore the lake ecosystem by raising the water level by at least 6 m within 30 years are implemented. In the article, changes in...
Article
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Non-carcinogenic and carcinogenic health risks of heavy metal pollution in the soils around the Kapan mining area, Armenia were investigated. The results of the study showed that the content of heavy metals (Cr, Mn, Ni, Cu, Zn, As, Mo, Cd, Pb) in the soils sampled in June, 2013 may have posed non-carcinogenic and even carcinogenic risks to populati...
Article
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The irrigation properties of the Voghji and its main tributaries-Artsvanik and Geghi rivers and their agricultural risks according to the content of some heavy metals and dissolved mineral salts were investigated. Water sampling was implemented in irrigation period (July) of 2016. The results of the study showed that waters in the Voghji river site...
Article
Full-text available
The role of different environmental factors in the formation of zooplankton community in the river ecosystems of the Arpa River catchment basin was investigated. The results of the study showed that zooplankton diversity in the mentioned ecosystems was significantly affected by the river velocity, which caused not only deterioration but also improv...
Book
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
Investigations carried out by different authors have shown that during Summer period, algal bloom in "Yerevanyan lich" reservoir situated in the southwest of Yerevan city, Armenia occurs. Taking into consideration the possible environmental effects of reservoir algae bloom, the zooplanktonic community and saprobic state of "Yerevanyan lich" reservo...
Article
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The ecologo-sanitary state of the Hrazdan river and Yerevanyan lich" reservoir was assessed according to aerobic, coliform and Escherichia coli (E. coli) bacteria growth rates. Bacteriological investigations were carried out in April and June-August, 2015. Bacterial analysis was implemented by the "RIDA COUNT" medium sheets under sterile conditions...
Article
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The heavy metal pollution degree in the soils around the Zangezur copper and molybdenum combine in Syunik Marz, Armenia was assessed. The results of the study showed that heavy metal pollution degree in the soils mainly decreased with increasing distance from the open mine and the ore enrichment combine which indicated that the open mine and the or...
Article
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Beta-glucosidase, chitinase, leucine-aminopeptidase, acid phosphomonoesterase and acetate-esterase enzyme activities in the soils under the impact of metallurgical industrial activity in Lori marz (district) were investigated. The results of the study showed that the activities of the investigated enzymes in the soils decreased with increasing dist...
Conference Paper
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Conference Paper
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The heavy metal pollution of the soils around the mining area near Shamlugh town and related risks to human health were assessed. The investigations showed that the soils were polluted with heavy metals that can be ranked by anthropogenic pollution degree as follows: Cu>Pb>As>Co>Ni>Zn. The main sources of the anthropogenic metal pollution of the so...
Article
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Kajaran town is situated in the south-east of the Republic of Armenia in Syunik Marz. Developed mining and smelting industries can be observed in this area. This economic sphere is one of the main sources of soil pollution with heavy metals causing desertification of soils. Taking into consideration the location of the main sources of pollution six...
Article
Full-text available
The present study was aimed at assessing the heavy metal pollution of the soils around Qajaran town, Armenia and related environmental risks. The investigations showed that the soils around the mining complex near Qajaran town were highly polluted with heavy metals (Mo, Cu, Pb, As, Zn, Ni) which was conditioned by the Zangezur copper and molybdenum...
Article
Full-text available
Kajaran town is situated in the southeast of the Republic of Armenia in Syunik Marz. Developed mining and smelting industries can be observed in this area. This economic sphere is one of the main sources of soil pollution with heavy metals causing desertifi cation of soils. Taking into consideration the location of the main sources of pollution six...
Article
Full-text available
Kapan town is situated in the southeast of the Republic of Armenia. The lands of the area belong to the type of mountain cambisols and fluvisols. The studies revealed that the surface of soils was well covered by vegetation in this area and the naked soils generally made only 0-32% in all. Studied soils were basically weakly eroded and the degree o...
Article
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Analyses of some physicochemical properties of soil samples from six of the most risky sites in mining territories around Kajaran Town and from unpolluted site as a control revealed that the studied soils were basically weakly eroded, and they were classified from moderately bad to good according to texture. In some soil samples much stoniness was...
Article
Full-text available
The physicochemical parameters of the soils around Qajaran town and the degree of land degradation in this area were studied. Qajaran town is situated in the southeast of the Republic of Armenia where mining and metallurgical industries are highly developed. The studies revealed that the surface of soils in this area was well covered by vegetation...
Article
Full-text available
Nowadays, natural reservoirs and all water resources are evaluated insufficient in the Republic of Armenia. This status of water resources leads to the ecological disbalance between nature and society. The unsparing and intensive use of water resources, incomplete mechanisms of their management, monitoring and quality evaluation have been accompani...

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Projects

Projects (18)
Project
International Symposium on Dielectric Materials and Applications (ISyDMA'8) Tentative dates: Nov 29 - Dec 01, 2023 Venue: TBD
Project
The aim of the project is to assess the dynamics of bloom-forming cyanobacteria in Lake Sevan, reveal its drivers, and develop new monitoring tools for management of the eutrophication processes. We will also develop science-based recommendations for mitigating cyanobacterial blooms in the lake.
Project
The main goals of the project are:  Nutrient budget for Lake Sevan and nutrient management concept  Coupled physical‐ecological 1D eutrophication model for Lake Sevan (nutrients, plankton, oxygen)  Use of satellite‐based remote sensing for estimation of water quality of Lake Sevan  Evaluation of alternative management scenarios and identification of major water quality threats for Lake Sevan including the preparation of a policy brief  Capacity Building in Armenia for use of satellite remote sensing and lake modelling  Publication of the project results including realization of a final public project workshop in 2023