A. I. Kopylov's research while affiliated with Russian Academy of Sciences and other places

Publications (72)

Article
Full-text available
A small amount of information about the composition and functioning of prokaryotes and viruses in the Kara, Laptev and East Siberian seas makes it impossible to provide a quantitative assessment of all parameters of the carbon cycle which is necessary to analyze and predict the impact of climate change on the entire Arctic biota. Of particular inte...
Article
The distribution of virioplankton, abundance and production, frequency of visibly infected cells of heterotrophic bacteria and autotrophic picocyanobacteria and their virus-induced mortality have been studied in mesotrophic and eutrophic reservoirs of the Upper and Middle Volga (Ivankovo, Uglich, Rybinsk, Gorky, Cheboksary, and Sheksna reservoirs)....
Article
In September 2017, studies were conducted in the East Siberian Sea along the transect from a Indigirka delta to the ice edge at the outer shelf margin. The abundances of planktonic prokaryotes (NPR) and free viruses (NV), frequency of visibly infected prokaryotic cells (FVIC), and virus-mediated mortality of prokaryotes (VMPR) varied within (0.5–3....
Article
The distribution of viruses and their impact on prokaryotes were studied using the epifluorescence and transmission electron microscopy along a transect, located at 130°E from the area adjacent to the Lena River delta next to the shelf area, the continental slope area and the deep-sea regions of the Laptev Sea in September 2015. The abundance of pl...
Article
For the first time, the species composition of heterotrophic nanoflagellates, their quantitative characteristics, as well as the abundance and biomass of their main food objects: bacteria and picophytoplankton, were determined in the water column and sediments of the Laptev Sea. On a meridional transect from the Lena delta to the deep-sea zone in e...
Article
Full-text available
On the basis of our own and published data, the contribution of autotrophic communities to the total primary production in the ecosystem of the Rybinsk Reservoir was estimated during the vegetation season in 2009. The contributions were as follows: 390 198 t C for phytoplankton, 6100 t C for epiphyton, 115 550 t C for macrophytes, and 1491 t C for...
Article
We studied vertical distribution of bacteria and viruses in different layers of the Arctic sea ice drilled at the North Pole. The sampled multi-year ice was characterized by uneven vertical distribution of bacterial abundance. This characteristic varied within the range of 8±1.2×103 to 95±2.6×103 cells ml-1. The layers with the maximal bacterial ab...
Article
The seasonal and long-term dynamics of phytoplankton primary production has been studied in the Rybinsk Reservoir (Upper Volga) in 2005–2014. A positive correlation has been found to exist between the values of plankton primary production, averaged over vegetation period, and the abiotic factors of the water medium (temperature, solar radiation, an...
Article
Full-text available
We studied vertical distribution of bacteria and viruses in different layers of the Arctic sea ice drilled at the North Pole. The sampled multi-year ice was characterized by uneven vertical distribution of bacterial abundance. This characteristic varied within the range of 8 ± 1.2 × 10³ to 95 ± 2.6 × 10³ cells mL–1. The layers with the maximal bact...
Article
Populations, biomasses, and production rates of planktonic, epiphytic, and benthic bacterial communities were defined in two reservoirs of the upper Volga, and their contributions to total numbers of bacteria and productivity were estimated. Populations and production rates of heterotrophic bacteria in 1-cm3 samples of bottom sediments exceed fouli...
Article
Full-text available
Two reservoirs in the Upper Volga were studied to determine the abundance, biomass, and production of planktonic, epiphyte, and benthos bacterial communities and to assess their contribution to the formation of the total abundance and productivity of bacteria. The abundance and production of heterotrophic bacteria per 1 cm³ of bottom sediments were...
Book
Full-text available
Abstract: The book generalizesthe results of the integrated monitoring of the ecosystem and special studies in the Rybinsk Reservoir during the years of its existence with a particular emphasis on the period of the last 15 years. The work highlights fundamental problems of hydrobiology and ecology, and the relationships between the long-term dynami...
Article
The abundances of virioplankton and planktonic picocyanobacteria in deep and shallow water sites of Rybinsk Reservoir during the freezing period (water temperature 0.3–0.9°C) varied from (37.1 to 84.1) × 10 ⁶ ((57.3 ± 2.1) × 10 ⁶ , on average) particles/ml and from 13.5 to 75.0 × 10 ³ ((48.7 ± 3.4) × 10 ³ , on average) cells/ml, respectively. The f...
Article
Full-text available
The total biomass of the biotic component of the ecosystem has been determined and the contribution of the main ecological groups—autotrophic and heterotrophic organisms from different habitats—to its formation has been estimated in a large plain meso-eutrophic reservoir (Rybinsk Reservoir, Upper Volga). Particular attention is paid to the role of...
Article
Full-text available
Using our own data and data from the literature, we assessed the total biomass of the biotic component of the ecosystem of the Ivankovo Reservoir (Upper Volga, Russia), a eutrophic reservoir which is becoming overgrown with macrophytes. The biotic component of freshwater ecosystems is formed by communities of multicellular and unicellular organisms...
Preprint
Full-text available
We studied vertical distribution of bacteria and viruses in different layers of the Arctic sea ice drilled at the North Pole. The sampled multi-year ice was characterized by uneven vertical distribution of bacterial abundance. This characteristic varied within the range of 8±1.2 ×103 to 95±2.6 ×103 cells ml-1. The average bacterial abundance was 28...
Preprint
Full-text available
We studied vertical distribution of bacteria and viruses in different layers of the Arctic sea ice drilled at the North Pole. The sampled multi-year ice was characterized by uneven vertical distribution of bacterial abundance. This characteristic varied within the range of 8±1.2 ×103 to 95±2.6 ×103 cells ml-1. The average bacterial abundance was 28...
Article
Full-text available
The spatial distribution and seasonal dynamics of heterotrophic bacterioplankton production have been studied and the value of autochthonous sources of substrates for bacteria has been evaluated in the pelagic zone of the meso-eutrophic Rybinsk Reservoir (the Upper Volga). During the vegetation period, the bacterial production ranges from 32 to 135...
Article
The abundance, biomass, production, and size and morphological structure of heterotrophic bacteria have been determined and their contribution to the total plankton biomass has been assessed in the Rybinsk Reservoir (the Upper Volga) during the ice-covered period. Structural and functional characteristics of bacteria, except for their cell sizes in...
Article
Full-text available
The content of total free nucleotides (TFNs) in the plankton of the Rybinsk reservoir and in specific size fractions of the plankton has been determined by the spectrophotometric method modified by the authors. The content of TFNs amounts to 58.1 ± 5.4, 75.2 ± 4.6, and 64.1 ± 7.3 μg/L in spring, summer, and autumn, respectively, and exhibits a clos...
Article
Abundance, biomass, and taxonomic composition of heterotrophic nanoflagellates (HNFs) have been determined in the water column and bottom sediments of the large lowland meso-eutrophic reservoir (Rybinsk Reservoir, Upper Volga) in summer. The role of HNFs in the consumption of the bacterial production is estimated. In the reservoir, 55 species from...
Article
Concentrations of heterotrophic bacteria have been measured in the epiphyton of seven species of higher aquatic plants in the Ivankovo Reservoir. The abundance and biomass of the bacterioepiphyton range from 64.1 × 10⁶ to 283.7 × 10⁶ cells/сm² and from 1.6 to 6.7 μg С/сm². Maximum values are recorded in the epiphyton of emergent aquatic plants.
Article
The abundance and biomass of the main components of the microbial plankton food web (“microbial loop”)—heterotrophic bacteria, phototrophic picoplankton and nanoplankton, heterotrophic nanoflagellates, ciliates and viruses, production of phytoplankton and bacterioplankton, bacterivory of nanoflagellates, bacterial lysis by viruses, and the species...
Article
The distribution of structural and functional characteristics of virioplankton in the north of the Ob River estuary and the adjacent Kara Sea shelf (between latitudes 71°44′44″ N and 73°45′24″ N) was studied with consideration of the spatial variations in the number (NB) and productivity (PB) of bacteria and water properties (temperature, salinity,...
Article
The abundance dynamics of adult dreissenids (Dreissena polymorpha (Pallas) and D. bugensis Andrusov) and of their larvae and the spatial distribution of the abundance of veligers and their role in the functioning of the plankton community have been analyzed on the basis of the data of original long-term monitoring (2004–2013) in Rybinsk Reservoir....
Article
The structural and functional properties of the bacterioplankton in two small rivers and the Sheksna River that run through the large industrial city of Cherepovets were studied from April to October 2009–2011. The three-year average numbers and biomass of planktonic bacteria in small rivers were 18.7–18.8 million cells/mL and 3.5–4.9 g/m³, respect...
Article
Full-text available
The paper considers the concentrations and functional characteristics of viruses, bacteria, and heterotrophic nanoflagellates determined for the first time in the Laptev Sea in August-September, 2014. The abundance of bacteria, viruses, and heterotrophic nanoflagellates varied from 110.1 × 10³ to 828.4 × 10³ cells/mL, from 384.2 × 10³ to 2932.8 × 1...
Article
Virioplankton and bacterioplankton abundance has been determined in the pelagic and littoral zones of the Rybinsk Reservoir during the ice-covered period. The role of viruses in heterotrophic bacterioplankton infection and mortality is assessed. At water temperatures between 0.3 and 0.9°C, the number of planktonic virus particles and planktonic bac...
Article
The total number and morphological and size composition of viriobenthos, number of bacteria infected by viruses, and burst size, as well as virus-induced mortality, abundance, and production of bacteriobenthos, have been estimated in bottom sediments of the Rybinsk Reservoir. The total number of viriobenthos in the reservoir varies within (1.1–10.9...
Article
The abundance, biomass, and production (Р В) of bacrerioplankton; the taxonomic composition, abundance, biomass of heterotrophic nanoflagellates (HNF) and the rate of consumption of bacteria by HNFs; and the abundance of virioplankton, frequency of visibly infected bacterial cells, virus-induced mortality of bacterioplankton, and viral production w...
Article
Full-text available
The viral and bacterioplankton communities of the Barents Sea were investigated using a combination of methods of electron and epifluorescence microscopy for the first time. The quantitative composition of the communities and the nature of their interactions were also determined. Our study showed that during the summer the abundance and biomass of...
Article
The total number of viruses, morphological and size composition of viriobenthos, number of bacterial cells infected by viruses, number of mature phages inside bacterial cells, and virus-induced mortality of bacteriobenthos have been estimated in bottom sediments of the Ivankovo Reservoir. The total number of viriobenthos in the reservoir range from...
Article
Studies were conducted in shallow and deepwater areas of the Kara Sea. The abundance of bacteria (N B ) and the abundance of viruses (N V ) ranged within (19.4–2215.1) × 103 cells/ml and (97.6–5796.8) × 103 particles/ml, respectively. The virus to bacteria ratio varied from 1.4 to 29.1. A positive correlation was found between N B and N V (R = 0.87...
Article
The abundance and production of planktonic viruses, frequency of infected bacterial cells and number of mature phages in infected bacterial cells, and virus-induced mortality of bacterioplankton were studied in two small rivers and the large Sheksna River flowing through a large city in April–October, 2011. High positive correlations have been dete...
Article
During the summer season of 2010, abundance and productivity of picocyanobacteria in Gorky and Cheboksary Reservoirs have being examined. It is found out that in the eutrophic reservoirs of the Middle Volga abundance and biomass of picocyanobacteria, averaged over the water column, varied within the range of (34-322) x 10(3) cells/ml and 38-455 mg/...
Article
In April to October 2009-2011, the species composition and seasonal changes in abundance and biomass of heterotrophic nanoflagellates were studied in the Sheksna River and in the small Yagorba and Serovka rivers running through a large industrial center. A total of 48 species and forms of colorless flagellates were recorded in the rivers. The abund...
Article
In July 2010, abnormally high water temperature (25–29°C), as well as increased biomass and phytoplankton production caused intensive development of heterotrophic bacteria and heterotrophic nanoflagellates. It was found that the abundance, biomass, and production of heterotrophic bacterioplankton, as well as the abundance and biomass of heterotroph...
Article
During the anomalously hot summer of 2010, the water temperature in the Gorky reservoir reached 27–33°C. Pronounced cyanobacterial blooms occurred in the limnetic part of the reservoir. The average values for bacterioplankton abundance (11.58 ± 1.25 × 106 cell/mL), biomass (886 ± 96 mg/m3), and production [169 ± 32 mg C/(m3 day)] were twice as high...
Article
Full-text available
In August–September 2009, the concentration of dissolved organic matter and quantitative distribution of virioplankton, bacterioplankton, and heterotrophic nanoflagellates were studied in the coastal waters of the Kara Sea, the fresh waters of the islands and the coasts of the sea, and the estuaries of the Ob’ and Yenisei rivers. A high positive co...
Article
In sites of the Rybinsk Reservoir with different levels of contamination by the municipal and industrial wastewater from the city of Cherepovets, the primary production of phytoplankton and the quantitative distribution of bacterioplankton, heterotrophic nanoflagellates, and viruses, as well as the content of finely disperse detritus, were investig...
Article
Full-text available
Changes in metazooplankton productivity and the pressure of invertebrate predators in the Rybinsk Reservoir are analyzed on materials of long-term studies (1956–1995). The production of the plankton community was shown to be twice as high (72.5 kcal/m2) in 1990–1995 as in 1950–1970, i.e., typical for aquatic ecosystems of the eutrophic type. About...
Article
The spatial distribution of virio- and bacterioplankton and the role that viruses play in heterotrophic bacteria elimination was studied in the small Il’d’ River (Rybinskoe Reservoir tributary, Upper Volga). The bacterioplankton abundance and biomass constituted 3.3–19.6 (8.5 on average) million cells/ml and 501–2353 mg/m3 (1054 mg/m3 on average),...
Article
Full-text available
In aquatic ecosystems, viruses are considered to be an important factor controlling bacterioand phy� toplankton abundance, production, and diversity and play an important role in the biogeochemical cycles of carbon and other components (1). Analysis of litera� ture on ecology of aquatic viruses shows that, at present, viruses in freshwaters are les...
Article
Full-text available
The quantitative distribution of viruses and their impact on heterotrophic bacterioplankton were studied in mesotrophic and eutrophic reservoirs of the Volga and Volga-Baltic waterway. The abundance of planktonic virus particles ranged from 9.4 × 106 to 120 × 106 ml−1 and was from 2.5 to 9 times greater than the bacterial numbers. Production of vir...
Article
Full-text available
We studied the distribution of the main components of planktic food web: bacteria, heterotrophic flagellates, and ciliates in the lower reaches of the Ob River near the town of Salekhard. In the early summer, the abundance, biomass, and diversity of protozoans were low; the plankton community was dominated by heterotrophic bacteria whose biomass wa...
Article
Full-text available
The quantitative distribution and relationships of picocyanobacteria and viruses were studied in the mesotrophic Sheksna and mesoeutrophic Rybinsk reservoirs belonging to the system of the Volga-Baltic Waterway. The share of picocyanobacteria in the sum biomass and production of phytoplankton decreased along with increase in the productivity in the...
Article
The first data on the content of pico-sized detrital particles (0.2–2.0 μm) are obtained by epifluorescence microscopy in the upper Volga reservoirs. The spatial and temporal distributions of density and mass of picodetritus are described. The quantitative proportions between heterotrophic bacteria, picophytoplankton, and pico-sized detritus were r...
Article
Full-text available
Spatial distribution of planktonic viral particles (virioplankton) and mortality of heterotrophic bacteria caused by viral lysis were studied in the eutrophic Ivan’kovskoe and mesotrophic Uglichskoe reservoirs (the Upper Volga). During the summer peak of phytoplankton, the number of viral particles was higher in the Ivan’kovskoe Reservoir ((55.1 ±...
Article
Full-text available
The role of autochthonous viruses in the regulation of bacterioplankton abundance and production was studied in the Rybinsk Reservoir. During the ice-free period, the number of virus-like particles varied within the range of (11.0-57.4) x 10(6) particles/ml. The virus to bacterioplankton abundance ratio ranged within 3.0-9.4. From 4 to 25% of bacte...
Article
The structure of planktic trophic chains was studied in eight lakes of European Russia and five lakes in Central Asia. The lakes differed in the level of productivity, morphometric parameters, and the type of agitation and mineralization. It is found that the microbial loop of picophototrophic organisms, bacteria, heterotrophic flagellates, infusor...
Article
Full-text available
Regularities of bacteria distribution in the bottom sediments of the Upper Volga reservoirs are studied. Human-induced changes in the structure and activity of bacteriobenthos communities occurring in water body areas adjacent to towns and settlements are described. Reservoir zones subject to long-term human impact are distinguished.
Article
Full-text available
Patterns of sulfate reduction were studied in water and sediments of Lake Shira, South Siberia, Russia. The lake was characterized by a high level of sulfate (91-116 mM). The concentration of hydrogen sulfide in the anoxic waters of the lake reached 0.6 mM. In summer the sulfate reduction rate in the water column, measured by radiometric technique,...
Article
The structural and functional parameters of bacterioplankton and their dynamics were evaluated in different oceanographic domains of the Eastern Bering Sea in the late spring and summer. The numbers of bacteria varied from 0.5 × 106 to 3.9 × 106 cells/ml, the bacterial biomass ranged from 7 to 110 mg C/m3, and the bacterial production varied from 0...
Article
We studied the effect of four types of fronts, the coastal front, the middle front, the shelf partition front and the shelf break front on the quantitative distribution and the composition of plankton communities in the Pribilof area of the eastern Bering Sea shelf in late spring and summer of 1993 and 1994. The coastal fronts near St. Paul and St....
Article
Full-text available
The distribution of primary components of the microbial community (autotrophic pico- and nanoplankton, phototrophic bacteria, heterotrophic bacteria, microscopic fungi, heterotrophic flagellates, ciliates and heliozoa) in the water column of Lake Shira, a steppe brackish-water, stratified lake in Khakasia, Siberia (Russia), were assessed in midsumm...
Article
Full-text available
Rates of oxygenic and anoxygenic photosynthesis, chemoautotrophic and heterotrophic bacterial production and protozoan bacterivory were measured in the pelagic zone of the stratified brackish-water lake with the purpose to determine the vertical distribution of these processes and to estimate their significance in the functioning of planktonic comm...
Article
This study is based on the primary production data obtained by radiocarbon methods in the main oceanographic domains and frontal zones in the Pribilof area in the eastern Bering Sea in the summer seasons of the years 1992-1994. The spatial and temporal (intraseasonal and annual) variability of the photosynthesis rate over the shelf and in the adjac...
Article
Full-text available
The enumeration of actively respiring bacterial cells in different biotopes of the littoral zone of the Rybinsk Reservoir during the spring period of ice thaw using the fluorescent dye 5-cyano-2,3-ditolyl tetrazolium chloride showed that bacterial communities growing on the bottom surface of the ice cover and in water overgrown by higher aquatic pl...
Article
Full-text available
The enumeration of actively respiring bacterial cells in different biotopes of the littoral zone of the Rybinsk Reservoir during the spring period of ice thaw using the fluorescent dye 5-cyano-2,3-ditolyl tetrazolium chloride showed that bacterial communities growing on the bottom surface of the ice cover and in water overgrown by higher aquatic pl...
Article
On the basis of the materials collected in June-August 1994, characteristic data on microplankton were gathered in three biotopes of the eastern shelf of the Bering Sea: the open shelf waters (coastal zone of the island), the harbor, and the salt lagoon of Saint Paul Island (Pribiof Islands). The following parameters of the microplanktonic communit...
Article
Full-text available
The current state of the Ivan'kovo Reservoir bacterioplankton is assessed. Data on the total number, biomass, and production of planktonic microflora are presented. The concentrations of active bacteria and their detritus are determined. The distribution of saprophytic microflora is studied.
Article
Total bacterial cell number and the number of nucleoid-containing bacteria were determined in various biotopes of Rybinsk Reservoir. The mean content of nucleoid-containing cells in the water column, bottom sediments, periphyton of higher aquatic plants, and blankets formed by filamentous green algae was found to comprise 25.4%, 42.4%, 51.9%, and 7...
Article
Full-text available
The structure of planktic trophic chains was studied in eight lakes of European Russia and five lakes in Central Asia. The lakes differed in the level of productivity, morphometric parameters, and the type of agitation and mineralization. It is found that the microbial loop of picophototrophic organisms, bacteria, heterotrophic flagellates, infusor...

Citations

... In recent years, aquatic viruses have been recognized as important and potential top-down agents which play vital roles in regulating carbon and nutrient fluxes, food-web dynamics, and microbial diversity [10,11]. Viral infection is known to vary systematically together with their principal hosts, bacteria along the lake trophic gradient, with reports Microorganisms 2023, 11, 384 2 of 15 of higher lysis in eutrophic compared with oligotrophic environments [12,13]. Viruses, through their host-specificity mechanism and density-dependent regulation, can transiently remove 20-60% of the daily bacterial population in lake ecosystems of varying trophic states [14]. ...
... Prokaryotes are typically simple, single-celled organisms; they have ribosomes to make proteins, a membrane and a cell wall to contain the contents of the cell, and their DNA is packed up in the middle of the cell [286][287][288][289][290]. Certain prokaryotes, consisting of some species of Archaea and bacteria, use anaerobic respiration, which can be discovered in soil and in the digestive tracts of ruminants, like cows and sheep [291][292][293][294]. Many prokaryotes can switch between aerobic respiration and fermentation, depending on the availability of oxygen [295][296][297]. The group of Archaea called methanogens decreases carbon dioxide to methane to oxidize NADH, and some sulfate-reducing bacteria and Archaea are anaerobic, decline sulfate to hydrogen sulfide to regenerate NAD + from NADH [298][299][300]. ...
... While in pelagic ecosystems the relationship between planktonic primary production and bacterioplankton production is well-known and clearly demonstrated (Cole et al., 1988;Kopylov et al., 2018;Kopylov et al., 2020), the relative importance of the heterotrophic bacterioplankton in macrophyte-dominated littoral systems is largely unknown and the few papers published on the subject so far have yielded contrasting results. It is generally assumed that heterotrophic bacterial production in the littoral zone can be much (up to 120 times) higher than in the pelagic zone (Reitner et al., 1999;Likens, 2010 and references therein). ...
... The materials give an idea of the state and development of INLAND WATER BIOLOGY Vol. 15 No. 6 2022 ecosystems, demonstrating the stable trophic status of the Cheboksary Reservoir and its interannual changes in Gorky and Kuibyshev reservoirs. However, studies of the relationship between the phytoplankton productivity and abiotic factors are rare in the reservoirs (Mineeva, 2004;Mineeva et al., 2008;Kopylov et al., 2020). In recent years, during complex expeditions of the Institute for Biology of Inland Waters, Russian Academy of Sciences at the Volga River, new data have been obtained that supplement the observations of previous years and form the basis of long-term monitoring of ecosystems of large artificial reservoirs. ...
... The aim of this work was to study the effects of runoff from large Siberian rivers on the structural and functional characteristics of virus communities on the inner and outer shelves of the Siberian Arctic seas. Based on the published (Kopylov et al. 2015(Kopylov et al. , 2017(Kopylov et al. , 2020(Kopylov et al. , 2021a and unpublished new data, this article is the first to briefly overview the features of the virioplankton structure, the level of viral infection, and virus-induced mortality of heterotrophic prokaryotes in the riverine and marine waters mixing zone versus those in the zones significantly less subjected to the effect of runoff from the Ob and Yenisei rivers in the Kara Sea; the Lena River in the Laptev Sea; and the Indigirka and Kolyma rivers in the East Siberian Sea. ...
... Juveniles of these species develop among aquatic plant stands all summer long and leave their feeding grounds only during a sharp deterioration of the habitat conditions, e.g., a sharp decrease in the water level or autumn cooling of the water (Stolbunov, 2007). HAV makes the main contribution (74.4%) to the primary production of the reservoir (Kopylov et al., 2019). Therefore, understanding the patterns of overgrowing processes in protected shallow waters and their trend is an important fundamental and applied problem. ...
... To better understand the activity of sea ice-inhabiting viruses and their implication in biogeochemical cycles once released into the water column, it is crucial to monitor their abundance and the virus-mediated mortality of their hosts. Several previous studies showed virus abundances with distinct values during spring in the Arctic sea ice (Maranger et al. 1994;Sazhin et al. 2019), as well as in the Antarctic sea ice (Paterson and Laybourn-Parry 2012;Luhtanen et al. 2018). However, there is still little information on viral activity. ...
... Of particular interest is assessing the influence of climate changes on the state and functioning of freshwater biohydrocenoses of reservoirs, which are classified as quasi-cyclic systems with significant anthropogenic load (Korneva et al., 2016(Korneva et al., , 2019Gelca et al., 2016;Kopylov et al., 2019Kopylov et al., , 2020Golubkov, 2021). Warming leads to an increase in mineralization, the transformation of cycles of biogenic elements, a decrease in transparency and the oxygen content, an increase in the proportion of autochthonous OM, biodiversity changes, etc., in these water bodies. ...
... Бактериобентос представляет собой группу микроорганизмов, обитающих в донных отложениях водных экосистем и выполняющую функцию деструкции органического вещества. Результаты исследований демонстрируют огромный метаболический потенциал бентосных бактерий и их ведущую роль в минерализации органического вещества в верхневолжских водохранилищах [1,2]. Куйбышевское водохранилище представляет особый интерес для изучения бактериобентоса в связи с особенностями морфологической конфигурации и гидрологического режима, значительными размерами, физико-химическим разнообразием и неоднородностью донных отложений, а также функциональной значимостью бактериального сообщества в процессах круговорота органического и биогенного вещества в водохранилище [3]. ...
... While in pelagic ecosystems the relationship between planktonic primary production and bacterioplankton production is well-known and clearly demonstrated (Cole et al., 1988;Kopylov et al., 2018;Kopylov et al., 2020), the relative importance of the heterotrophic bacterioplankton in macrophyte-dominated littoral systems is largely unknown and the few papers published on the subject so far have yielded contrasting results. It is generally assumed that heterotrophic bacterial production in the littoral zone can be much (up to 120 times) higher than in the pelagic zone (Reitner et al., 1999;Likens, 2010 and references therein). ...