Dmitry Kosolapov

Dmitry Kosolapov
Russian Academy of Sciences | RAS · Papanin Institute of the Biology of Inland Waters

PhD

About

72
Publications
5,304
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495
Citations
Citations since 2016
32 Research Items
256 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
Introduction
Dmitry Kosolapov currently works at the Papanin Institute of the Biology of Inland Waters, Russian Academy of Sciences. Dmitry does research in Aquatic Microbiology. Their most recent publication is 'Production of Heterotrophic Bacterioplankton in a Large Meso-Eutrophic Reservoir: The Importance of Extracellular Organic Carbon Released by Phytoplankton'.
Additional affiliations
January 1988 - April 2015
Russian Academy of Sciences
Position
  • Laboratory Head

Publications

Publications (72)
Article
For the first time in the Mekong delta (Vietnam), the abundance and biomass of the main components of the planktonic microbial food web, and namely: bacteria, picophytoplankton, and heterotrophic and phototrophic flagellates were determined; the features of their spatial distribution and the species diversity of heterotrophic flagellates were studi...
Article
The dynamics and relationship between planktonic algae, bacteria, protozoa, invertebrates, and viruses were studied at different sites in shallow littoral zones of the Rybinsk Reservoir (Upper Volga) in April-June. The features of seasonal succession of different components of the littoral plankton community have been identified. The spring peak in...
Article
Full-text available
The taxonomic and size-morphological structure of bacterioplankton has been studied in two large Mongolian reservoirs and the rivers on which they are built. Correlations between the taxonomic and size groups of bacteria and their main consumers, hetero-trophic nanoflagellates, have been revealed. It has been shown that the protists consume large a...
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
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
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The appearance of Daphnia (Ctenodaphnia) magna Straus, 1820 in the pelagial of Sevan Lake caused significant changes in the communities of planktonic algae, bacteria, and heterotrophic nanoflagellates. Phytoplankton and nanoflagellates were the most affected by the direct impact of D. magna, and the number and biomass of bacteria increased due to t...
Article
This article analyzes the seasonal and interannual dynamics of active and viable bacteria in coastal waters of a large plain reservoir (Rybinsk Reservoir, Volga River) due to the activity of birds of the families Laridae and Sternidae. An increase in the number and proportion of dividing cells and cells with undisturbed nucleoids in bacterioplankto...
Article
Full-text available
The abundance and biomass of bacterioplankton, phototrophic picoplankton, and heterotrophic nanoflagellates has been determined in lakes, rivers, and reservoirs located in the Valley of the Lakes and Great Lakes Depression (Mongolia). The species richness of the heterotrophic flagellates and their consumption of bacteria are estimated. Pico- and na...
Article
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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
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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...
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
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
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
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
Interactions of the main components of microbial planktonic food web (bacteria, heterotrophic nanoflagellates, and viruses) were studied in a protected overgrown littoral zone of the Rybinsk Reservoir (Upper Volga). The effect of colonial bird settlements (the Laridae family) on these processes was determined. The following systems exhibited signif...
Article
Full-text available
Plankton and benthos production were estimated on the basis of materials collected in the Tayshir Reservoir after its formation. The species ratio and the growth and diets of fish have been considered also. A high abundance and increased maximal sizes of Potanin’s Altai osman (Oreoleuciscus potanini) were revealed. The benthic organisms dominated i...
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
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The qualitative composition and structure of the autumn zooplankton in the pelagic zone of Lake Sevan in years that were characterized by different abundancies of fish are described. In October 2013, upon the increase in whitefish abundance, the species richness of zooplankton increased insignificantly; the values of the trophic coefficient and the...
Article
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The effect of a colony of hydrophilic birds of the family Laridae on the dynamics of bacterioplankton, heterotrophic nanoflagellates, and extracellular virus particles is studied in the protected overgrown littoral of the Rybinsk Reservoir. Coastal waters of the reservoir are characterized by high quantitative characteristics of microorganisms and...
Article
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The active fraction, production, and respiration of heterotrophic bacteria are determined to assess their growth efficiency and their role in the carbon cycle in the pelagic zone of Rybinsk Reservoir in summer. The greater part of organic substances assimilated by bacteria is mineralized to CO2. It has been established that the essential part of th...
Article
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The influence of gull and heron colonies on the dynamics of heterotrophic bacteria, flagellates, and viruses in the coastal waters of the Rybinsk Reservoir is studied. The littoral zone of the reservoir is found to contain abundant microorganisms and virioplankton. The specifics of the seasonal dynamics of these components of the microbial communit...
Article
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The eutrophic effect of products of vital activity of colonies of hydrophilic birds on the community of heterotrophic plankton in shallow parts of the plain reservoir is shown. The strongest effect of birds is observed in a protected part of the reservoir. Specific changes in some characteristics of zooplankton as distinct from the response to the...
Article
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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
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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
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The abundance and taxonomic and trophic structures of the community of planktonic heterotrophic nanoflagellates, as well as the quantitative distribution of bacteria as their main object of food, have been studied in six lakes of Karelia with differing pH values, concentrations and compositions of organic substances, and degrees of anthropogenic lo...
Article
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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
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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
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It is shown that in the area inhabited by a colony of the common heron in a high-trophic shallow lake a number of structure parameters of plankton undergoes changes similar to those observed at anthropogenic eutrophication and indicating an increase in biogenic and organic load. At the same time a number of changes is revealed that are usually not...
Article
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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
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The fauna and abundance of heterotrophic nannoflagellates (HNF) and the quantitative distribution of their main food items (bacteria) have been studied in the highly eutrophic Lake Nero (Yaroslavskaya oblast). A total of 70 HNF species and forms were found, with representatives of the order Choanoflagellida dominant. Abundances of HNF and bacteria...
Article
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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
Industrial wastewater is often polluted by Cr(VI) compounds, presenting a serious environmental problem. This study addresses the removal of toxic, mutagenic Cr(VI) by means of microbial reduction to Cr(III), which can then be precipitated as oxides or hydroxides and extracted from the aquatic system. A strain of Staphylococcus epidermidis L-02 was...
Article
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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
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In deep layers of stratified bodies of water, anaerobic conditions are formed and hydrogen sulfide is accumulated as a result of the activity of sulfate-reducing bacteria. There is a transition zone termed chemocline at the interface between aerobic and anaerobic waters in these water bodies. In the chemocline zone, drastic vertical gradients of ph...
Article
Anthropogenic pollution of water bodies causes destruction of aerobic bacterial assemblages in soils and formation of anaerobic ones. As a result, the bottom sediments become sources of secondary pollution.
Article
This paper reviews the main microbial processes involved when toxic metals are removed from wastewater in constructed wetlands. Microbial activity is thought to play a key role in the detoxification of these metals. The paper concentrates on the microbial processes which affect the mobility, the toxicity and bioavailability of metals, namely biosor...
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
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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
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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
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Concentrations of CH4 and the rates of processes of its transformation and oxidation are evaluated in the littoral zone of a large polimictic reservoir in the open-water period. The production of CH4 in bottom sediment was found to vary within 0.07 to 17.32 mmol/(m2 day) and attain its maximum in the late summer. The main factors to control the act...
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
Full-text available
The abundance of various groups of bacteria and the rate of microbiological processes of organic decay and methane cycle in the water and soils of the Gor'kovskoe Reservoir are determined, and the ecological characterization of its river reach is presented. The autochthonous and allochthonous impact on the bacterial community of the reservoir was f...
Article
It is elucidated that in the surface layers of bottom grounds of the Rybinsk Reservoir, aerobic microorganisms decompose the most part of organic matter (OM). Proteolytic and celluloselytic bacteria are highly active at the initial stages of that process. Methanogenesis is dominating at the terminal stages of OM breakdown. Acetogenesis plays a cons...
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 o