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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Hellweger F.L., Kravchuk E.S., Novotny V., Gladyshev M.I.
Заглавие : Agent-based modeling of the complex life cycle of a cyanobacterium (Anabaena) in a shallow reservoir
Место публикации : Limnology and Oceanography. - 2008. - Vol. 53, Is. 4. - С. 1227-1241. - ISSN 00243590 (ISSN)
Ключевые слова (''Своб.индексиров.''): algal bloom--annual variation--cyanobacterium--ecological modeling--eulerian analysis--experimental study--lagrangian analysis--life cycle--nutrient availability--phytoplankton--population dynamics--reservoir--shallow water--survival--water column--bugach reservoir--eurasia--krasnoyarsk [russian federation]--russian federation--anabaena--anabaena flos-aquae
Аннотация: The cyanobacterium Anabaena flos-aquae and many other phytoplankton species have a complex life cycle that includes a resting stage (akinete). We present a new agent-based (also known as individual-based) model of Anabaena that includes the formation and behavior of akinetes. The model is part of a coupled Eulerian-Lagrangian model and can reproduce the main features of the observed seasonal and interannual population dynamics in Bugach Reservoir (Siberia), including an unexpectedly large bloom in a year with low nutrient concentrations. Model analysis shows that the internal loading of phosphorus (P) due to germination from the sediment bed is ?10% of the total input. However, most of the long-term nutrient uptake for Anabaena occurs in the sediment bed, which suggests that the sediment bed is not just a convenient overwintering location but may also be the primary source of nutrients. An in silico tracing experiment showed that most water column cells (?90%) originated from cells located in the sediment bed during the preceding winter. An in silico gene knockout experiment (akinete formation is prohibited) showed that the formation of resting stages is of critical importance to the survival of the population on an annual basis. A nutrient-reduction management scenario indicates that Anabaena densities increase because they are less sensitive to water column nutrient levels (because of the sediment bed source) than other species. В© 2008, by the American Society of Limnology and Oceanography, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Kiselev E.G., Shishatskaya E.I., Zhila N.O., Boyandin A.N., Syrvacheva D.A., Vinogradova O.N., Kalacheva G.S., Vasiliev A.D., Peterson I.V.
Заглавие : Cell growth and accumulation of polyhydroxyalkanoates from CO2 and H2 of a hydrogen-oxidizing bacterium, Cupriavidus eutrophus B-10646
Место публикации : Bioresource Technology. - 2013. - Vol. 146. - С. 215-222. - ISSN 09608524 (ISSN) , DOI 10.1016/j.biortech.2013.07.070
Ключевые слова (''Своб.индексиров.''): autotrophic synthesis--cupriavidus eutrophus--polyhydroxyalkanoates
Аннотация: Synthesis of polyhydroxyalkanoates (PHAs) by a new strain of Cupriavidus - Cupriavidus eutrophus B-10646 - was investigated under autotrophic growth conditions. Under chemostat, at the specific flow rate D=0.1h-1, on sole carbon substrate (CO2), with nitrogen, sulfur, phosphorus, potassium, and manganese used as growth limiting elements, the highest poly(3-hydroxybutyrate) [P(3HB)] yields were obtained under nitrogen deficiency. In batch autotrophic culture, in the fermenter with oxygen mass transfer coefficient 0.460h-1, P(3HB) yields reached 85% of dry cell weight (DCW) and DCW reached 50g/l. Concentrations of supplementary PHA precursor substrates (valerate, hexanoate, ?-butyrolactone) and culture conditions were varied to produce, for the first time under autotrophic growth conditions, PHA ter- and tetra-polymers with widely varying major fractions of 3-hydroxybutyrate, 4-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate monomer units. Investigation of the high-purity PHA specimens showed significant differences in their physicochemical and physicomechanical properties. В© 2013 Elsevier Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zadereev E.S., Gubanov V.G., Gribovskaya I.V.
Заглавие : Chemical composition of water conditioned by crowded Moina macracopa (Crustacea : Cladocera)
Колич.характеристики :5 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 2000. - Vol. 31, Is. 2. - P113-117. - ISSN 1067-4136, DOI 10.1007/BF02828365
Примечания : Cited References: 25
Предметные рубрики: DAPHNIA-PULEX
ZOOPLANKTON
PARAMETERS
INDUCTION
Ключевые слова (''Своб.индексиров.''): cladocera--metabolic products--chemical analysis--chemical composition
Аннотация: The chemical composition of water conditioned by colonies of Moina macrocopa and involved in the regulation of their life cycle was analyzed in comparison with water samples from natural water bodies. Dechlorinated tap water was used as the control medium. The results showed that metabolism of crustaceans leads to an increase in the concentrations of phosphorus and nitrogen in all forms, the appearance of protein and carbohydrate fractions, and changes in the composition of lipid fractions in the water conditioned by their colonies. The contents of all organic components are very low, which makes their identification difficult. Concentrations of substances identified in the conditioned water do not exceed those occurring in nature.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zadereev E.S., Gubanov V.G., Gribovskaya I.V.
Заглавие : Chemical composition of water conditioned by crowded Moina macrocopa (Crustacea: Cladocera)
Место публикации : Russian Journal of Ecology. - 2000. - Vol. 31, Is. 2. - С. 113-117. - ISSN 10674136 (ISSN)
Ключевые слова (''Своб.индексиров.''): chemical analysis--chemical composition--cladocera--metabolic products
Аннотация: The chemical composition of water conditioned by colonies of Moina macrocopa and involved in the regulation of their life cycle was analyzed in comparison with water samples from natural water bodies. Dechlorinated tap water was used as the control medium. The results showed that metabolism of crustaceans leads to an increase in the concentrations of phosphorus and nitrogen in all forms, the appearance of protein and carbohydrate fractions, and changes in the composition of lipid fractions in the water conditioned by their colonies. The contents of all organic components are very low, which makes their identification difficult. Concentrations of substances identified in the conditioned water do not exceed those occurring in nature. В© 2000 MAIK "Nauka/Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tolomeev A.P., Dubovskaya O.P., Sushchik N.N., Makhutova O.N., Kalacheva G.S.
Заглавие : Differentiated influence of quality of seston (Content of C, N, P, and polyunsaturated fatty acids) on rate of somatic and generative growth of Daphnia
Место публикации : Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - С. 450-458. - ISSN 19954255 (ISSN) , DOI 10.1134/S1995425512040130
Ключевые слова (''Своб.индексиров.''): c: n: p--daphnia--fatty acids--food quality--generative growth--somatic growth--carbon--crustacean--data set--fatty acid--food quality--growth rate--nitrogen--phosphorus--reservoir--seston--bugach reservoir--krasnoyarsk [russian federation]--russian federation--animalia--daphnia
Аннотация: The data set obtained in 19 experiments aimed at studying the growth of Daphnia of the longispina group on natural seston of the Bugach water reservoir (Krasnoyarsk) was used to analyze the relationship between the parameters of somatic and generative growth of the studied animals and the amount and quality of food. Depending on the quality of the seston, two models of the development of Daphnia were proposed. It was demonstrated that, despite the existing positive correlation between somatic and generative growth, a noticeable fraction of the variations of the specific rate of generative production is determined by external factors of the environment, such as the relative content of N and ?-linolenic acid (N: C and ALA: C) in seston. В© 2012 Pleiades Publishing, Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova I., Sakharova E., Karpowicz M., Gladyshev M. I., Sushchik N. N., Dawidowicz P., Gorelysheva Z., Gorniak A., Stroinov Y., Dzialowski A.
Заглавие : Direct and indirect impacts of fish on crustacean zooplankton in experimental mesocosms
Место публикации : Water: MDPI AG, 2019. - Vol. 11, Is. 10. - Ст.2090. - ISSN 20734441 (ISSN) , DOI 10.3390/w11102090
Аннотация: Understanding the factors that regulate phytoplankton and zooplankton is an important goal of aquatic ecologists; however, much remains unknown because of complex interactions between phytoplankton, zooplankton, and fish. Zooplankton, in particular cladocerans, can be regulated by bottom-up factors either via food quantity or food quality in terms of polyunsaturated fatty acids (PUFA) or phosphorus (P) contents in phytoplankton. Fish can recycle nutrients and in turn change the PUFA and P contents of algal resources, thus modifying bottom-up regulation. Furthermore, fish can change phytoplankton structure through consumption of cladocerans which selectively graze phytoplankton. We conducted a mesocosm (300 L) experiment to determine how trophic state and fish affected crustacean dynamics. The mesocosms were filled with water containing natural plankton from the eutrophic Lake Jorzec and mesotrophic Lake Majcz (Northeastern Poland), and we manipulated fish presence/absence. We also conducted a complementary life-table experiment to determine how trophic state and fish nonconsumptively affected demographic parameters of the dominant cladocerans in the mesocosms. Small and large cladoceran species responded differently to food quantity and quality. Small-bodied Ceriodaphnia were regulated mainly by resource concentrations (i.e., food quantity), while large species were limited by PUFAs (i.e., food quality). Fish likely increased food quality in terms of PUFA, primarily eicosapentaenoic acids (EPA), thus providing conditions for more successful development of Daphnia than in the fish-free treatments. Phosphorus in the seston was likely limiting for zooplankton. However, food quality in terms of phosphorus was likely less important than PUFA because zooplankton can accumulate nutrients in their body. © 2019 by the authors.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krylov, A., V, Makhutova N., Sakharova E. G., Sushchik N. N., Pavlov D. D., Kolmakova A. A., Stolbunov I. A., Gladyshev, M., I
Заглавие : Diverse impacts of semiaquatic bird colonies on biochemical composition of seston, plankton, and fish fry in a plain reservoir
Колич.характеристики :12 с
Место публикации : Zhurnal Obshchei Biol.: MEZHDUNARODNAYA KNIGA, 2018. - Vol. 79, Is. 6. - С. 449-460. - ISSN 0044-4596, DOI 10.1134/S0044459618060052
Примечания : Cited References:47
Предметные рубрики: FATTY-ACID-COMPOSITION
GROWTH
ZOOPLANKTON
ECOSYSTEMS
NITROGEN
Аннотация: Diverse, multidirectional changes in biochemical composition of seston, plankton, and fish fry are detected in the coastal zone of a plain reservoir in the vicinity of a semiaquatic bird colony during vegetation season with extra high water level. Under these conditions, specific patterns of phyto- and zooplankton structure and quantitative characteristics, that, as was found out earlier, result from the vital activity of birds belonging to the family Ardeidae (namely, raising the share of mixotrophic phytoflagellates and copepods in plankton species composition) are leveled out. The main role in this process belongs to decomposition of immersed vegetation in the coastal zone, development of littoral macrophytes, and trophic relationships between algae and invertebrates. However, increase in atmospheric precipitation leads to increase in copepods abundance, which seems to be related to fast and intensive inflow of nitrogen-rich products of birds' vital activity. Due to this, during the whole period of observations, the following tendencies are revealed in biochemical composition of seston, plankton, and fish fry in the vicinity of the bird colony: 1) concentrations of carbon, nitrogen, and phosphorus and their ratios turn out to be auspicious for predominance of diatoms and mixotrophic phytoflagellates, rich in docosahexaenoic acid (DSA); 2) the abundance of phytoplankton, rich in polyunsaturated essential fatty acids (PEFA), favors propagation of those planktonic crustaceans which contain significantly more DSA and are more valuable food items for fish; 3) predominance of zooplankters, rich in PEFA, leads to higher concentration of PEFA in fry fish tissues, which, in certain periods, turns out to be advantageous for successful development and growth of dominant species of fish fry,such as roach, bream, white bream, and perch, by comparison with the test site.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Manukovsky N.S., Kovalev V.S.
Заглавие : Effect of biohumus on growth of oyster fungus Pleurotus ostreatus and Agaricus bisporus
Колич.характеристики :4 с
Место публикации : Mikol. Fitopatol.: MEZHDUNARODNAYA KNIGA, 1998. - Vol. 32, Is. 5. - P67-70. - ISSN 0026-3648
Примечания : Cited References: 8
Аннотация: The influence of biohumus on the yeild of oester mushroom has been studied. It was shown, that the highest yeild 9.73 g of dry mass per 100 g of dry substrate mass was an the substrate, containing 25 % of biohumus and 75 % of wheat straw. The possible cause of this effect could arise from increasing phosphorus content in the substrate. The hughest growth rate of champignon mycelium was 2.2-2.4 mm/day on the substrate, containing 94-96 % of wheat grains and 4-6 % of biohumus.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova, I. Yu, Sakharova E. G., Gladyshev, M., I, Sushchik N. N., Gorelysheva, Z., I, Karpowicz M.
Заглавие : Effect of Fish on the Transfer Efficiency of Carbon, PUFA, and Nutrients from Phytoplankton to Zooplankton under Eutrophic Conditions
Колич.характеристики :14 с
Коллективы : National Science Center of PolandNational Science Centre, Poland [UMO-506 2016/21/B/NZ8/00434]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-54-00002 Bel_a]; Belarusian Republican Foundation for Basic Research (BRFFR) [B18R-004]; Russian Science FoundationRussian Science Foundation (RSF) [16-14-10323]; [AAAA-A18-118012690096-1]
Место публикации : Biol. Bull: PLEIADES PUBLISHING INC, 2021. - Vol. 48, Is. 8. - С. 1284-1297. - ISSN 1062-3590, DOI 10.1134/S1062359021080070. - ISSN 1608-3059(eISSN)
Примечания : Cited References:49. - Experiments and collection of biological material were supported by the National Science Center of Poland (project no. UMO-506 2016/21/B/NZ8/00434). Processing of phytoplankton samples was carried out with the financial support of the Russian Foundation for Basic Research (project no. 18-54-00002 Bel_a); processing of zooplankton samples and their analysis were carried out with the financial support of the Belarusian Republican Foundation for Basic Research (BRFFR no. B18R-004); statistical processing and analysis of data were performed under government contract no. AAAA-A18-118012690096-1; and interpretation of the results, data analysis, and preparation of materials for publication, were done with the financial support of the Russian Science Foundation (project no. 16-14-10323).
Предметные рубрики: FATTY-ACIDS
FOOD QUALITY
FRESH-WATER
ZEBRA MUSSELS
DAPHNIA
Аннотация: The efficiency of the transfer of carbon, polyunsaturated fatty acids (PUFA), nitrogen, and phosphorus from phytoplankton to zooplankton determines the functioning of the entire ecosystem. However, this parameter depends on environmental conditions. Fish as a very important factor regulating planktonic communities very likely affect the efficiency of the transfer of basic elements and substances from phytoplankton to zooplankton. In experimental mesocosms filled with water from a eutrophic lake and containing phyto- and zooplankton, we investigated how fish affect both primary and secondary production and the efficiency of transfer of carbon, nitrogen, phosphorus, PUFA, and fatty acids (FAs) from phytoplankton to zooplankton. Two treatments (control and fish treatment) were repeated in three replicates. The transfer efficiency of substances from phytoplankton to zooplankton was measured as the ratio of secondary production to primary production expressed per L and per unit of biomass. The efficiency expressed per L characterizes the productivity of the water body, while the efficiency expressed per unit of biomass indicates the effectiveness of aquatic species to transfer biologically valuable substances from one trophic level to another. We found that phytoplankton-zooplankton-fish interface is determined not only by predator-prey relationships, but are also affected by the quality of both phytoplankton and zooplankton in terms of contents of phosphorus, nitrogen, PUFA, and FAs in their biomass. We showed that, in the presence of fish, the transfer efficiency of carbon, phosphorus, nitrogen, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and FAs per unit of biomass from phytoplankton to zooplankton was increased twofold, 12.4-fold, 2.5-fold, 12.4-fold, 7.4-fold, and tenfold, respectively, relative to the control. This facilitates sustainable functioning of the ecosystem under fish pressure. Such a mechanism prevents zooplankton over-exploitation by fish and enlarges the food chain.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ushakova S.A., Kovaleva N.P., Gribovskaya I.V., Dolgushev V.A., Tikhomirova N.A.
Заглавие : Effect of NaCl concentration on productivity and mineral composition of Salicornia europaea as a potential crop for utilization NaCl in LSS
Место публикации : Advances in Space Research. - 2005. - Vol. 36, Is. 7. - С. 1349-1353. - ISSN 02731177 (ISSN) , DOI 10.1016/j.asr.2004.09.017
Ключевые слова (''Своб.индексиров.''): life support system--nacl--salicornia europaea--space biology--calcium--concentration (process)--minerals--photosynthesis--plants (botany)--salinity measurement--sodium chloride--vegetation--life support systems--liquid wastes--nacl--salicornea europea--space biology--space research
Аннотация: The accumulation of solid and liquid wastes in manmade ecosystems presents a problem that has not been efficiently solved yet. Urine, containing NaCl, are part of these products. This is an obstacle to the creation of biological systems with a largely closed material cycling, because the amount of solid and liquid wastes in them must be reduced to a minimum. A possible solution to the problem is to select plant species capable of utilizing sufficiently high concentrations of NaCl, edible for humans, and featuring high productivity. Until recently, the life support systems have included the higher plants that were either sensitive to salinization (wheat, many of the legumes, carrot, potato, maize) or relatively salt-resistant (barley, sugar beet, spinach). Salicomia europaea, whose above-ground part is fully edible for humans, is one of the most promising candidates to be included in life support systems. It is reported in the literature that this plant is capable of accumulating up to 50% NaCl (dry basis). Besides, excessive accumulation of sodium ions should bring forth a decrease in the uptake of potassium ions and other biogenic elements. The aim of this work is to study the feasibility of using S. europaea plants in growth chambers to involve NaCl into material cycling. Plants were grown in vegetation chambers at the irradiance of 100 or 150 W/m2 PAR (photosynthetically active radiation) and the air temperature 24 В°C, by two methods. The first method was to grow the plants on substrate - peat. The peat was supplemented with either 3% NaCl (Variant 1) or 6% NaCl (Variant 2) of the oven-dry mass of the peat. The second method was to grow the plants in water culture, using the solution with a full complement of nutrients, which contained 0.0005% of NaCl, 1% or 2%. The study showed that the addition of NaCl to the substrate or to the solution resulted in the formation of more succulent plants, which considerably increased their biomass. The amount of NaCl uptake was the highest in the plants grown in water culture, 2.6 g per plant. As the sodium uptake increased, the consumption of potassium and the sum of the reduced N forms decreased twofold. The uptake of calcium and magnesium by plants decreased as the NaCl concentration increased; the smallest amounts were taken up by S. europaea grown in water culture. Salinity had practically no effect on the uptake of phosphorus and sulfur. Thus, S. europaea is a promising candidate to be included in life support systems; of special interest is further research on growing these plants in water culture. В© 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.
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11.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Stolyar S. V., Chekanova L. A., Yaroslavtsev R. N., Ladygina V. P., Tirranen L. S.
Заглавие : Effect of nanoparticles in growth of test - Bacteria
Место публикации : Journal of Physics: Conference Series: Institute of Physics Publishing, 2019. - Vol. 1399: International Scientific Conference on Applied Physics, Information Technologies and Engineering 2019, APITECH 2019 (25 September 2019 through 27 September 2019, ) Conference code: 156053, Is. 2. - Ст.022029. - , DOI 10.1088/1742-6596/1399/2/022029
Аннотация: Confident effect of five magnetic composite nanoparticles (FeP@Ag, FeP@Pd, CoP, NiP, Fe2O3@A) on growth of test bacteria colonies (Acinetobacter baumannii, scherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus) in five replicates each is considered. Reliable inhibitors of colonies of all five test bacteria were nanoparticles FeP@Ag. CoP nanoparticles are reliable inhibitors of growth of 4 test bacteria (except for test bacteria Escherichia oli). NiP nanoparticles are reliable inhibitors of growth of 2 test bacteria: Escherichia oli and Klebsiella pneumoniae. Bacteria Escherichia oli were most sensitive to the effect of magnetic nanoparticles; and bacteria Pseudomonas aeruginosa and Staphylococcus aureus were most resistant to the effect of magnetic nanoparticles. The prospects of the method are in the possibility of multiple reuse of the magnetic particles with antimicrobial properties for bacterial decontamination of the studied sources of water and removal of magnetic nanoparticles from the treated liquids by electromagnet. The method can find use in water treatment facilities for household, Industrial and medical wastes. © Published under licence by IOP Publishing Ltd.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sakharova E. G., Karpowicz M., Gladyshev, M., I, Sushchik N. N., Gorelysheva, Z., I, Feniova, I. Yu
Заглавие : Effects of Dreissena polymorpha on the transfer efficiency of carbon, fatty acids, nitrogen, and phosphorus from phytoplankton to zooplankton
Колич.характеристики :13 с
Место публикации : Zhurnal Obshchei Biol.: MEZHDUNARODNAYA KNIGA, 2021. - Vol. 82, Is. 3. - С. 188-200. - ISSN 0044-4596, DOI 10.31857/S0044459621030052
Примечания : Cited References:72
Предметные рубрики: ZEBRA MUSSELS
FRESH-WATER
MICROCYSTIS-AERUGINOSA
DAPHNIA-LONGISPINA
Аннотация: The efficiency of the transfer of physiologically valuable substances including polyunsaturated fatty acids (PUFA), nitrogen, and phosphorus from phytoplankton to zooplankton is extremely important for the functioning of the whole food web. The bivalve mollusk Dreissena polymorpha has a great impact on planktonic communities. However, its effects on the efficiency of transfer of physiologically valuable substances from phytoplankton to zooplankton have not been assessed so far. The goal of our study was to assess the effect of zebra mussels on the transfer efficiency of carbon, fatty acids including PUFA, nitrogen, and phosphorus from phytoplankton to zooplankton under mesotrophic conditions. In the experimental mesocosms filled with water from a mesotrophic lake containing phyto- and zooplankton, we manipulated the presence/absence of zebra mussels. The experiments showed that zebra mussels decreased the efficiency of the transfer of carbon, PUFA, nitrogen, and phosphorus from phytoplankton to zooplankton, thus reducing the quality of zooplankton as a food resource for higher trophic levels. However, zooplankton revealed the ability to increase the content of physiologically valuable substances in their tissues relative to their contents in the diet. We believe that the mechanism of accumulation of physiologically valuable substances by zooplankton enables to at least partially resist the negative influence of zebra mussels on the quality of zooplankton as a food resource.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova, I. Yu, Sakharova E. G., Gladyshev, M., I, Sushchik N. N., Gorelysheva, Z., I, Karpowicz M.
Заглавие : EFFECTS OF FISH ON THE TRANSFER EFFICIENCY OF CARBON, PUFA AND NUTRIENTS FROM PHYTOPLANKTON TO ZOOPLANKTON UNDER EUTROPHIC CONDITIONS
Колич.характеристики :15 с
Место публикации : Zool. Zhurnal: MAIK NAUKA-INTERPERIODICA PUBL, 2021. - Vol. 100, Is. 2. - С. 194-208. - ISSN 0044-5134, DOI 10.31857/S0044513421020215
Примечания : Cited References:49
Предметные рубрики: FATTY-ACIDS
FOOD QUALITY
FRESH-WATER
ZEBRA MUSSELS
PHOSPHORUS
Аннотация: The efficiency of the transfer of carbon, polyunsaturated fatty acids (PUFA), nitrogen and phosphorus from phytoplankton to zooplankton determines the functioning of the entire ecosystem. However, this parameter depends on environmental conditions. Fish as a very important factor to regulate planktonic communities are very likely to affect the efficiency of the transfer of basic elements and substances from phytoplankton to zoo plankton. In experimental mesocosms filled with water from an eutrophic lake and containing phyto- and zooplankton, we investigated how fish affect both primary and secondary production and the efficiency of transfer of carbon, nitrogen, phosphorus, PUFA and fatty acids (FA) from phytoplankton to zooplankton. Two treatments (control and fish treatment) were repeated in three replicates. The transfer efficiency of substances from phytoplankton to zooplankton was measured as the ratio of secondary to primary production, expressed in liters and per biomass unit in percent. The efficiency expressed per liter characterizes the productivity of the water body, while the efficiency expressed per biomass unit indicates the effectiveness of aquatic species to transfer biologically valuable substances from one trophic level to another. We found that phytoplankton-zooplankton-fish interactions are determined not only by predator-prey relationships, but also are affected by the quality of both phytoplankton and zooplankton, measured as the contents of phosphorus, nitrogen, PUFA and FA in their biomass. We showed that, in the presence of fish, the transfer efficiency of carbon, phosphorus, nitrogen, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), FA per biomass unit from phytoplankton to zooplankton was increased two-fold, 12.4-fold, 2,5-fold, 12.4-fold, 7.4-fold, and 10-fold, respectively, relative to control. This provides the sustainability of the functioning of the ecosystem under fish pressure. Such a mechanism prevents zooplankton over-exploitation by fish and enables to prolong the food chain.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova, Irina Yu, Karpowicz, Maciej, Gladyshev, Michail I., Sushchik, Nadezhda N., Petrosyan, Varos G., Sakharova, Ekaterina G., Dzialowski, Andrew R.
Заглавие : Effects of Macrobiota on the Transfer Efficiency of Essential Elements and Fatty Acids From Phytoplankton to Zooplankton Under Eutrophic Conditions
Колич.характеристики :15 с
Коллективы : Polish National Science Centre [2016/21/B/NZ8/00434]; Russian Science FoundationRussian Science Foundation (RSF) [21-14-00123]; Federal Tasks for Institute of Biophysics SB RAS [51.1.1]; Federal Tasks for Siberian Federal University [FSRG-2020-0019]; Polish National Agency for Academic ExchangePolish National Agency for Academic Exchange (NAWA) [PPN/ULM/2020/1/00258/U/DRAFT/00001]
Место публикации : Front. Environ. Sci.: FRONTIERS MEDIA SA, 2021. - Vol. 9. - Ст.739014. - ISSN 2296-665X(eISSN), DOI 10.3389/fenvs.2021.739014
Примечания : Cited References:76. - This experiment was performed with support from the Polish National Science Centre (2016/21/B/NZ8/00434). The statistical analysis and its interpretation was performed with support from the Russian Science Foundation (Grant No. 21-14-00123). Biochemical analyses were performed with support by Federal Tasks for Institute of Biophysics SB RAS No. 51.1.1 and Federal Tasks for Siberian Federal University No. FSRG-2020-0019. The preparation of the manuscript by Feniova I. was supported by the Polish National Agency for Academic Exchange (Agreement No. PPN/ULM/2020/1/00258/U/DRAFT/00001).
Предметные рубрики: FRESH-WATER ZOOPLANKTON
DAPHNIA-LONGISPINA
ZEBRA MUSSELS
Аннотация: The transfer pathways of organic matter and elements from phytoplankton to zooplankton in freshwater ecosystems are important for understanding how aquatic ecosystems function. We conducted a mesocosm experiment to determine how fish and zebra mussels altered the transfer efficiencies of essential substances including carbon (C), polyunsaturated fatty acids (PUFAs), total fatty acids (FAs), phosphorus (P), and nitrogen (N) from phytoplankton to zooplankton. We assessed the transfer efficiencies of the essential substances from phytoplankton to zooplankton as the ratio of their zooplankton production (P) per unit of biomass (B) to that of phytoplankton to exclude grazing or predation effects. We hypothesized that zebra mussels and fish would affect the transfer of materials from phytoplankton to zooplankton by altering the contents of essential elements and FAs in phytoplankton and zooplankton communities and/or due to shifts in the planktonic community structure mediated by grazing and/or predation. Fish increased the transfer efficiencies of eicosapentaenoic acid 20:5 omega-3 (EPA), docosahexaenoic acid 22:6 omega-3 (DHA), and P relative to the control. We speculated that fish weakened the control of zooplankton over algal assemblage by selectively feeding on larger cladocerans such as Daphnia. Therefore, fish can increase the relative proportion of high-quality food for zooplankton, improving food conditions for the available zooplankton. In contrast, zebra mussels reduced the transfer efficiencies of EPA and DHA relative to the control treatment likely due to competition with zooplankton for PUFA-rich food particles. However, zebra mussels did not have any impact on the transfer efficiencies of C, total FAs, N, and P. EPA, DHA, and P were transferred more efficiently than C from phytoplankton to zooplankton, while total FAs, which are commonly used as an energetic source, were transferred as efficiently as C. The enrichment of consumers with the most important substances relative to their basal food sources creates the potential for the successful transport of these substances across aquatic trophic webs./p
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova I., Dawidowicz P., Ejsmont-Karabin J., Gladyshev M., Kalinowska K., Karpowicz M., Kostrzewska-Szlakowska I., Majsak N., Petrosyan V., Razlutskij V., Rzepecki M., Sushchik N., Dzialowski A. R.
Заглавие : Effects of zebra mussels on cladoceran communities under eutrophic conditions
Место публикации : Hydrobiologia: Springer International Publishing, 2018. - С. 1-18. - ISSN 00188158 (ISSN) , DOI 10.1007/s10750-018-3699-4
Ключевые слова (''Своб.индексиров.''): chlorophyll--food quality--life-table experiments--phosphorus limitation--zooplankton
Аннотация: The purpose of this study was to determine how zebra mussels affected cladoceran community structure under eutrophic conditions. We conducted a mesocosm study where we manipulated the presence of zebra mussels and the presence of large-bodied Daphnia (Daphnia magna and Daphnia pulicaria). We also conducted a complimentary life-table experiment to determine how water from the zebra mussel treatment affected the life history characteristics of the cladoceran species. We anticipated that small- and large-bodied cladoceran species would respond differently to changes in algal quality and quantity under the effects of zebra mussels. Large-bodied Daphnia successfully established in the zebra mussel treatment but failed to grow in the control. We did not observe positive relationships between food concentrations and cladoceran abundances. However, the phosphorus content in the seston indicated that food quality was below the threshold level for large-bodied cladocerans at the beginning of the experiment. We believe that zebra mussels quickly enhanced the phosphorus content in the seston due to the excretion of inorganic phosphorus, thus facilitating the development of large-bodied Daphnia. In conclusion, our results suggest that zebra mussels can alter the phosphorus content of seston in lakes and this can affect the dynamics of crustacean zooplankton. © 2018 Springer International Publishing AG, part of Springer Nature
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova, I. Yu, Sakharova E. G., Buseva, Zh F., Gladyshev, M., I, Sushchik N. N., Gorelysheva, Z., I, Karpowicz M., Semenchenko V. P.
Заглавие : Efficiency of Transfer of Essential Substances from Phytoplankton to Planktonic Crustaceans in Mesotrophic Conditions
Колич.характеристики :11 с
Коллективы : Polish National Science Centre [UMO-506 2016/21/B/NZ8/00434]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-5400002 Bel_a]; Belarusian Republican Foundation for Fundamental Research [B18R004]; Russian Science FoundationRussian Science Foundation (RSF) [16-14-10323]; [AAAA-A18-118012690096-1]
Место публикации : Inland Water Biol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2021. - Vol. 14, Is. 1. - С. 49-59. - ISSN 1995-0829, DOI 10.1134/S1995082920040033. - ISSN 1995-0837(eISSN)
Примечания : Cited References:39. - The collection of biological material and experimental studies were supported by the Polish National Science Centre (project no. UMO-506 2016/21/B/NZ8/00434). Phytoplankton samples were processed with support from the Russian Foundation for Basic Research (project no. 18-5400002 Bel_a), zooplankton samples were processed and analyzed using the Belarusian Republican Foundation for Fundamental Research (project no. BRFFR no. B18R004), and statistical data analyses were conducted as part of State Task no. AAAA-A18-118012690096-1. The interpretation of the results, review of the literature, and preparation of materials for publication were funded by the Russian Science Foundation (project no. 16-14-10323).
Аннотация: We assessed the efficiency of the transfer of essential substances (carbon, phosphorus, nitrogen, and fatty acids (FA), including polyunsaturated fatty acids (PUFAs)) from phytoplankton to planktonic crustaceans in experimental mesocosms in the presence and absence of fish. The experiments were conducted under mesotrophic conditions in 300 L mesocosms. We have found that transfer efficiencies from producers to consumers are different for different substances. In particular, FA, including PUFAs, are transferred less efficiently than carbon. In contrast, the efficiency of nutrient transfer, especially phosphorus, is higher than that of carbon. This evidences that zooplankton can accumulate nutrients, increasing their quality as a resource for higher trophic levels. Fish significantly reduced the efficiency of carbon transfer from phytoplankton to zooplankton per unit of water volume, but did not affect the transfer of substances per unit of biomass. Thus, the quality of zooplankton as a food resource for higher trophic levels did not decrease in the presence of fish, despite the decline in the efficiency of the transfer of the essential substances per unit of water volume under their influence. Since the efficiency of essential substances transfered from phytoplankton to zooplankton determines the functioning of the entire trophic web, we should seek ways to increase it.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova I. Y., Sakharova E. G., Buseva Z. F., Gladyshev M. I., Sushchik N. N., Gorelysheva Z. I., Karpowicz M., Semenchenko V. P.
Заглавие : Efficiency of Transfer of Essential Substances from Phytoplankton to Planktonic Crustaceans in Mesotrophic Conditions
Место публикации : Inland Water Biol.: Pleiades journals, 2021. - Vol. 14, Is. 1. - С. 49-59. - ISSN 19950829 (ISSN), DOI 10.1134/S1995082920040033
Аннотация: Abstract: We assessed the efficiency of the transfer of essential substances (carbon, phosphorus, nitrogen, and fatty acids (FA), including polyunsaturated fatty acids (PUFAs)) from phytoplankton to planktonic crustaceans in experimental mesocosms in the presence and absence of fish. The experiments were conducted under mesotrophic conditions in 300 L mesocosms. We have found that transfer efficiencies from producers to consumers are different for different substances. In particular, FA, including PUFAs, are transferred less efficiently than carbon. In contrast, the efficiency of nutrient transfer, especially phosphorus, is higher than that of carbon. This evidences that zooplankton can accumulate nutrients, increasing their quality as a resource for higher trophic levels. Fish significantly reduced the efficiency of carbon transfer from phytoplankton to zooplankton per unit of water volume, but did not affect the transfer of substances per unit of biomass. Thus, the quality of zooplankton as a food resource for higher trophic levels did not decrease in the presence of fish, despite the decline in the efficiency of the transfer of the essential substances per unit of water volume under their influence. Since the efficiency of essential substances transfered from phytoplankton to zooplankton determines the functioning of the entire trophic web, we should seek ways to increase it. © 2021, Pleiades Publishing, Ltd.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova, Irina, Dawidowicz, Piotr, Gladyshev, Michail I., Kostrzewska-Szlakowska, Iwona, Rzepecki, Marek, Razlutskij, Vladimir, Sushchik, Nadezda N., Majsak, Natalia, Dzialowski, Andrew R.
Заглавие : Experimental effects of large-bodied Daphnia, fish and zebra mussels on cladoceran community and size structure
Колич.характеристики :15 с
Коллективы : Polish National Science Centre [2012/05/B/N28/02684], Belorussian Foundation for Basic Research [(sic)12P-98], Russian Foundation for Basic Research [14-04-00087], Siberian Federal University project; Russian Federal Tasks of Fundamental Research [51.1.1]
Место публикации : J. Plankton Res.: OXFORD UNIV PRESS, 2015. - Vol. 37, Is. 3. - С. 611-625. - ISSN 0142-7873, DOI 10.1093/plankt/fbv022. - ISSN 1464-3774(eISSN)
Примечания : Cited References:66. - This research was supported by the Polish National Science Centre (2012/05/B/N28/02684). The work also was supported by grants of Belorussian Foundation for Basic Research ((sic)12P-98), Russian Foundation for Basic Research (14-04-00087), Siberian Federal University project, carried out according to Federal Tasks of Ministry of Education and Science of Russian Federation (6.1089.214/K) and by Russian Federal Tasks of Fundamental Research (51.1.1).
Предметные рубрики: FRESH-WATER ZOOPLANKTON
POLYUNSATURATED FATTY-ACIDS
LAKE-ERIE
Ключевые слова (''Своб.индексиров.''): alien species--large- and small-bodied cladocerans--invasion mechanisms--pufa--c:n:p ratios
Аннотация: Understanding the factors that regulate the abundance, size structure and community structure of cladocerans is an important goal of aquatic ecologists. While both top-down and bottom-up factors help to structure cladoceran communities, there may be interactions between these factors. We conducted a mesocosm study to determine how alien large-bodied Daphnia, zebra mussels and fish affected cladoceran community and size structure. We found that large-bodied Daphnia reduced algal resources and the fecundity of smaller bodied cladocerans. Fish removed the large-bodied Daphnia magna from the mesocosms and shifted the cladoceran community to a smaller body size. Fish also appeared to promote increases in cladoceran diversity through the coexistence of several smaller bodied taxa. In contrast, zebra mussels increased cyanobacteria and helped to promote the success of the alien Daphnia, but reduced the biomass of small-bodied cladocerans. Zebra mussels reduced the carbon (C):phosphorus (P) ratio of the phytoplankton in the mesocosms which may have favored the relatively P-limited Daphnia. Combined, our results highlight the complex interactions of multiple factors that help to regulate cladoceran community and size structure.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovskij A.Ya., Kosinenko S.V.
Заглавие : Experimental investigations of the intensity of phosphorus radionuclide uptake by samples of algobacterial community of the Yenisei River
Место публикации : Radiatsionnaya Biologiya. Radioekologiya. - 2001. - Vol. 41, Is. 1. - С. 119-123. - ISSN 08698031 (ISSN)
Ключевые слова (''Своб.индексиров.''): phosphorus--alga--article--bacterium--microbiology--radiation exposure--russian federation--water pollution--algae--bacteria--phosphorus radioisotopes--siberia--water microbiology--water pollution, radioactive--algae--ecosystems--phosphorus--radioactivity--radioisotopes--river pollution--algobacterial community--radioecological concentration--yenisei river--biological radiation effects
Аннотация: The experiments in which phosphorus radionuclide was added to samples of algobacterial community of the Yenisei River taken near the production area of the Mining-and-Chemical Combine (Zheleznogorsk) made possible determining the uptake rates and coefficients of radionuclide accumulation by microorganisms. Radios between processes of adsorption and accumulation of phosphorus radionuclide by components of water seston (suspended matter) have been determined. The portion of the specific radioactivity of phosphorus adsorbed by unit mass of seston (and algae) has been found to be not more than 7% of the activity accumulated by algal cells.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Feniova, I. Yu., Razlutskij V. I., Gladyshev M. I., Kostrzewska-Szlakowska I., Majsak N. N., Rzepecki M., Sushchik N. N., Zilitinkevich N. S.
Заглавие : Factors of Dynamics of Plankton Crustacean Communities under Eutrophic Conditions
Колич.характеристики :8 с
Коллективы : Polish National Science Center [UMO-506 2016/21/B/NZ8/00434]; Russian Foundation for Basic Research [18-54-00002 Bel_a]; Belarusian Republican Foundation for Basic Research [B18SRBG-007, B18KI-007]; Russian Science Foundation [16-14-10323]
Место публикации : Russ. J. Ecol.: PLEIADES PUBLISHING INC, 2019. - Vol. 50, Is. 1. - С. 50-57. - ISSN 1067-4136, DOI 10.1134/S1067413619010028. - ISSN 1608-3334(eISSN)
Примечания : Cited References:35. - The experiments and collection of biological samples were carried out with support from the Polish National Science Center (UMO-506 2016/21/B/NZ8/00434). Phytoplankton samples were processed with support from the Russian Foundation for Basic Research (project no. 18-54-00002 Bel_a), zooplankton samples were processed with support from the Belarusian Republican Foundation for Basic Research (project nos. B18SRBG-007 and B18KI-007). Statistical analysis, interpretation of the results, literature review and preparation of publication were performed with support from the Russian Science Foundation (project no. 16-14-10323).
Предметные рубрики: FOOD QUALITY
STOICHIOMETRY
LIMITATION
GROWTH
WATER
NITROGEN
Ключевые слова (''Своб.индексиров.''): mesocosms--nutrients--chlorophyll--biomass of crustaceans--species--structure of zooplankton--food quality
Аннотация: It has been shown that the main drivers of the dynamics of cladoceran and copepod abundances can be predators (fish), the quantity and/or quality of food in terms of the contents of eicosapentaenoic acid, phosphorus and nitrogen in the seston under eutrophic conditions. In experimental mesocosms under eutrophic conditions, we found that, fish did not affect the quantity and quality of food resources for crustaceans. In the second half of experiments, however, dominance shifted from copepods to cladocerans. This was due to the improvement of the food quality for cladocerans in terms of the carbon-to-phosphorus ratio in the seston rather than to fish predation. Under eutrophic conditions, fish reduced the biomass of both cladocerans and copepods without changing the ratio between them.
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