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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Makhutova O.N.
Заглавие : Production of EPA and DHA in aquatic ecosystems and their transfer to the land
Место публикации : Prostaglandins and Other Lipid Mediators. - 2013. - ISSN 10988823 (ISSN) , DOI 10.1016/j.prostaglandins.2013.03.002
Ключевые слова (''Своб.индексиров.''): aquatic ecosystems--docosahexaenoic acid--eicosapentaenoic acid--trophic transfer efficiency
Аннотация: Most omnivorous animals, including humans, have to some degree relied on physiologically important polyunsaturated fatty acids (PUFAs), such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) from food. Only some taxa of microalgae, rather than higher plants can synthesize de novo high amounts of EPA and DHA. Once synthesized by microalgae, PUFA are transferred through trophic chain to organisms of higher levels. Thus, aquatic ecosystems play the unique role in the Biosphere as the principal source of EPA and DHA for most omnivorous animals, including inhabitants of terrestrial ecosystems. PUFA are transferred from aquatic to terrestrial ecosystems through riparian predators, drift of carrion and seaweeds, emergence of amphibiotic insects, and water birds. The essential PUFA are transferred through trophic chains with about twice higher efficiency than bulk carbon. Thereby, PUFA are accumulated, rather than diluted in biomass of organisms of higher trophic levels, e.g., in fish. Mankind is faced with a severe deficiency of EPA and DHA in diet. Although additional sources of PUFA supply for humans, such as aquaculture, biotechnology of microorganisms and transgenic terrestrial oil-seed producing plants are developed, natural fish production of aquatic ecosystems will remain one of the main sources of EPA and DHA for humans. Aquatic ecosystems have to be protected from anthropogenic impacts, such as eutrophication, pollution and warming, which reduce PUFA production. В© 2013 Elsevier Inc. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shirobokova I.M., Pechurkin N.S.
Заглавие : The effect of cannibalism intensity on net primary production and dynamics of trophic links in aquatic ecosystems
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1737-1741. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00112-1
Ключевые слова (''Своб.индексиров.''): biomass--ecosystems--mathematical models--photosynthesis--cannibalism intensity--space research--aquatic ecosystem--cannibalism--ecological modeling--net primary production--trophic structure--amphipoda--animal--aquaculture--article--biological model--biomass--cannibalism--daphnia--ecosystem--food chain--microclimate--phytoplankton--zooplankton--amphipoda--animals--aquaculture--biomass--cannibalism--daphnia--ecological systems, closed--ecosystem--food chain--models, biological--phytoplankton--zooplankton
Аннотация: A mathematical model was used to investigate the effect of cannibalism intensity on the net primary production and the dynamics of trophic links in an aquatic ecosystem characterized by cannibalism at the upper trophic level. A mathematical model of an aquatic ecosystem has been constructed, with the following principal trophic links: limiting nutrient concentration, producers (phytoplankton), nonpredatory and predatory zooplankton. The model takes into account the age structure of the predator and includes two age groups (the young and adults). The adult predators are cannibals feeding on both nonpredatory zooplankton and their own young, which consume phytoplankton. It has been found that when cannibalism intensity increases above a certain level, the concentrations of both adults and the young of the predators decrease. At the same time, the concentrations of the nonpredatory zooplankton and of nutrients increase, while the biomass of producers decreases. When the cannibalism intensity is low, the net primary production of the system increases to a certain level correlated with the increase in cannibalism intensity and drops sharply when the level of consumption of young is high. There is an optimal intensity of cannibalism, at which the productivity in the photosynthesis link is maximal. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Somova L.A.
Заглавие : Competition between links in "producers-consumer" trophic chains in an aquatic closed system with spatially separated components
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1599-1603. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00255-1
Ключевые слова (''Своб.индексиров.''): algae--aquifers--biodiversity--metabolism--nitrogen--protozoa--aquatic closed systems--spatially separated components--space research--aquatic ecosystem--competition--grazing--primary production--fresh water--nitrogen--animal--article--chlorella--food chain--green alga--metabolism--microclimate--paramecium--rotifera--algae, green--animals--chlorella--ecological systems, closed--food chain--fresh water--nitrogen--paramecium--rotifera
Аннотация: The work analyzes functioning of a "producer-consumer" closed aquatic system with spatially separated links, where each component consisted of two species. Producers in the system were the microalgae of Chlorella vulgaris and Scenedesmus sp., consumers - Paramecium caudatum infusoria and Brachionus sp. rotifers. In the experiment the competing predators were consuming on a mixed culture of algae, and the competition of algae was studied under nitrogen limitation. Under these conditions competitiveness of Scenedemus was higher than that of Chlorella vulgaris. Metabolism products of Scenedesmus algae have been found to have negative effect on reproduction of Paramecium caudatum protozoa. Predator population dynamics in the "consumer" link demonstrated that the rotifers that consume two algal species are more competitive compared to protozoa feeding on chlorella only. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Brilkov A.V., Ganusov V.V., Morozova E.V., Pechurkin N.S.
Заглавие : Computer modeling of the biotic cycle formation in a closed ecological system
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1587-1592. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00253-8
Ключевые слова (''Своб.индексиров.''): ecology--energy utilization--mathematical models--biotic turnover--predators--space research--artificial ecosystem--alga--animal--article--biological model--computer simulation--cyprinodontiformes--daphnia--ecosystem--energy metabolism--evolution--food chain--microclimate--plankton--algae--animals--computer simulation--daphnia--ecological systems, closed--ecosystem--energy metabolism--evolution--food chain--models, biological--plankton--poecilia
Аннотация: The process of biotic turnover in a closed ecological system (CES) with an external energy flow was analyzed by mathematical modeling of the biotic cycle formation. The formation of hierarchical structure in model CESs is governed by energy criteria. Energy flow through the ecosystem increases when a predator is introduced into a "producer-reducer" system at steady state. Analysis of the model shows that under certain conditions the presence of the primary predator with its high mineralization ability accelerates the biotic turnover measured by primary production. We, therefore, conclude that for every system it is possible to find a suitable predator able to provide the system with a higher biotic turnover rate and energy consumption. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khromechek E.B., Barkhatov Y.V., Rogozin D.Y.
Заглавие : Densities and distribution of flagellates and ciliates in the chemocline of saline, meromictic Lake Shunet (Siberia, Russia)
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 497-511. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9332-x
Ключевые слова (''Своб.индексиров.''): chemocline--ciliate--cryptomonas--deep chlorophyll maximum--diel vertical migrations--meromictic lakes--anoxic conditions--bacterium--biomass--chlorophyll--ciliate--diel migration--flagellate--meromictic lake--population density--saline lake--seasonal variation--vertical distribution--zooplankton--khakassia--lake shunet--russian federation--siberia--bacteria (microorganisms)--ciliophora--cryptomonas--hypotrichia--mastigophora (flagellates)--oligotrichia--phytomastigophorea--prostomatida--scuticociliatia
Аннотация: The vertical and seasonal distributions of the phytoflagellate Cryptomonas spp., and its most common, the planktonic ciliate predators (Oligotrichida, Scuticociliatida, Hypotrichida and Prostomatida) were investigated in chemocline region of small saline, meromictic lake Shunet (Siberia, Russia) during 2003 and 2005. The lake has a pronounced chemocline, with abundance of purple and green sulphur bacteria. Vertical distribution of the Cryptomonas populations near the oxic/anoxic boundary layer was studied at close intervals in water sampled using a hydraulically operated thin-layer sampler. In both summer and winter, Cryptomonas peaked in water stratum 5-10 cm above anoxic zone or in the anoxic zone water column in the chemocline (about 5 m). Ciliate densities and biomass were also much higher in chemocline than in mixolimnion. The range of diurnal migration of Cryptomonas population was not very wide, and it was restricted to layers with high light intensity. The ciliates were sometimes detected above the upper border of the anoxic zone but also several centimetres below this zone. В© 2010 Springer Science+Business Media B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O.P., Gladyshev M.I., Gubanov V.G.
Заглавие : Seasonal dynamics of number of alive and dead zooplankton in a small pond and some variants of mortality estimation
Колич.характеристики :13 с
Место публикации : Zhurnal Obshchei Biol.: MEZHDUNARODNAYA KNIGA, 1999. - Vol. 60, Is. 5. - С. 543-555. - ISSN 0044-4596
Примечания : Cited References: 22
Аннотация: The authors investigate seasonal dynamics of number of alive and dead zooplankton individuals, their vertical distribution and the rates of sedimetation using special staining. Seasonal dynamics of natural mortality (ageing, parasites, diseases, toxic substances) was calculated. The mortality was maximal in the middle of a summer (the period of zooplankton depression) and minimal - at the beginning and at the end of summer. The method was compared with traditional method of mortality calculation that includes death from predators. It was shown that zooplankton depression in the middle df summer was caused not by press of predators but by other reasons.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Makhutova O.N.
Заглавие : Production of EPA and DHA in aquatic ecosystems and their transfer to the land
Коллективы : Russian Foundation for Basic Research (RFBR) [11-04-00168, 12-05-00298]; project B-15 of Siberian Federal University
Место публикации : Prostaglandins Other Lipid Mediat.: ELSEVIER SCIENCE INC, 2013. - Vol. 107. - С. 117-126. - 10. - ISSN 1098-8823, DOI 10.1016/j.prostaglandins.2013.03.002
Примечания : Cited References: 129. - This work was supported by grants of Russian Foundation for Basic Research (RFBR) No. 11-04-00168 and No. 12-05-00298, and also by the project B-15 of Siberian Federal University, carried out according to Federal Tasks of Ministry of Education and Science of Russian Federation. We are grateful to two anonymous reviewers for their helpful comments to improve the manuscript.
Предметные рубрики: POLYUNSATURATED FATTY-ACIDS
FRESH-WATER FISH
EICOSAPENTAENOIC ACID
DOCOSAHEXAENOIC ACID
YENISEI RIVER
BIOTECHNOLOGICAL PRODUCTION
ARBUSCULAR MYCORRHIZAL
CAENORHABDITIS-ELEGANS
MICROBIAL COMMUNITY
THYMALLUS-ARCTICUS
Ключевые слова (''Своб.индексиров.''): eicosapentaenoic acid--docosahexaenoic acid--aquatic ecosystems--trophic transfer efficiency
Аннотация: Most omnivorous animals, including humans, have to some degree relied on physiologically important polyunsaturated fatty acids (PUFAs), such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) from food. Only some taxa of microalgae, rather than higher plants can synthesize de novo high amounts of EPA and DHA. Once synthesized by microalgae, PUFA are transferred through trophic chain to organisms of higher levels. Thus, aquatic ecosystems play the unique role in the Biosphere as the principal source of EPA and DHA for most omnivorous animals, including inhabitants of terrestrial ecosystems. PUFA are transferred from aquatic to terrestrial ecosystems through riparian predators, drift of carrion and seaweeds, emergence of amphibiotic insects, and water birds. The essential PUFA are transferred through trophic chains with about twice higher efficiency than bulk carbon. Thereby, PUFA are accumulated, rather than diluted in biomass of organisms of higher trophic levels, e.g., in fish. Mankind is faced with a severe deficiency of EPA and DHA in diet. Although additional sources of PUFA supply for humans, such as aquaculture, biotechnology of microorganisms and transgenic terrestrial oil-seed producing plants are developed, natural fish production of aquatic ecosystems will remain one of the main sources of EPA and DHA for humans. Aquatic ecosystems have to be protected from anthropogenic impacts, such as eutrophication, pollution and warming, which reduce PUFA production. (C) 2013 Elsevier Inc. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : KOVROV B.G., KOSOLAPOVA L.G.
Заглавие : DIVERGENCE OF FEATURES IN PREY UNDER THE INFLUENCE OF PREDATORS (A MATHEMATICAL-MODEL)
Колич.характеристики :10 с
Место публикации : Zhurnal Obshchei Biol.: MEZHDUNARODNAYA KNIGA, 1987. - Vol. 48, Is. 2. - P269-278. - ISSN 0044-4596
Примечания : Cited References: 13
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Somova L.A.
Заглавие : Competition between links in "producer-consumer" trophic chains in an aquatic closed system with spatially separated components
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ECOLOGICAL SYSTEMS: EARTH AND SPACE APPLICATIONS. Ser. ADVANCES IN SPACE RESEARCH: ELSEVIER SCIENCE BV, 2001. - Vol. 27: F4 4 Symposium of COSPAR Scientific Commission F held at the 33rd COSPAR Scientific Assembly (JUL, 2000, WARSAW, POLAND), Is. 9. - P1599-1603. - ISBN 0273-1177, DOI 10.1016/S0273-1177(01)00255-1
Примечания : Cited References: 13
Аннотация: The work analyzes functioning of a "producer-consumer" closed aquatic system with spatially separated links, where each component consisted of two species. Producers in the system were the microalgae of Chlorella vulgaris and Scenedesmus sp., consumers - Paramecium caudatum infusoria and Brachionus sp. rotifers. In the experiment the competing predators were consuming on a mixed culture of algae, and the competition of algae was studied under nitrogen limitation. Under these conditions competitiveness of Scenedesmus was higher than that of Chlorella vulgaris. Metabolism products of Scenedesmus algae have been found to have negative effect on reproduction of Paramecium caudatum protozoa. Predator population dynamics in the "consumer" link demonstrated that the rotifers that consume two algal species are more competitive compared to protozoa feeding on chlorella only. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shirobokova I.M., Pechurkin N.S.
Заглавие : The effect of cannibalism intensity on net primary production and dynamics of trophic links in aquatic ecosystems
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ARTIFICIAL ECOSYSTEMS AND LIFE SUPPORT SYSTEMS. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2003. - Vol. 31: Meeting of F4 1 Session of the 34th Scientific Assembly of COSPAR (OCT, 2002, HOUSTON, TEXAS), Is. 7. - P1737-1741. - ISBN 0273-1177, DOI 10.1016/S0273-1177(03)00112-1
Примечания : Cited References: 13
Аннотация: A mathematical model was used to investigate the effect of cannibalism intensity on the net primary production and the dynamics of trophic links in an aquatic ecosystem characterized by cannibalism at the upper trophic level. A mathematical model of an aquatic ecosystem has been constructed, with the following principal trophic links: limiting nutrient concentration, producers (phytoplankton), nonpredatory and predatory zooplankton. The model takes into account the age structure of the predator and includes two age groups (the young and adults). The adult predators are cannibals feeding on both nonpredatory zooplankton and their own young, which consume phytoplankton. It has been found that when cannibalism intensity increases above a certain level, the concentrations of both adults and the young of the predators decrease. At the same time, the concentrations of the nonpredatory zooplankton and of nutrients increase, while the biomass of producers decreases. When the cannibalism intensity is low, the net primary production of the system increases to a certain level correlated with the increase in cannibalism intensity and drops sharply when the level of consumption of young is high. There is an optimal intensity of cannibalism, at which the productivity in the photosynthesis link is maximal. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yermokhin M. V., Sushchik N. N., Tabachishin V. G., Kalacheva G. S., Kolmakova A. A., Gladyshev M. I.
Заглавие : Amphibia as a Vector of Transfer of Long-Chain Polyunsaturated Omega-3 Fatty Acids from Aquatic to Terrestrial Ecosystems
Колич.характеристики :3 с
Коллективы : Russian Foundation for Basic Research [16-04-01248]; Russian Academy of Sciences [II.2P/VI.51-1]; Ministry of Education and Science of the Russian Federation [6.1504.2017/PCh]; program of the President of the Russian Federation for state support of leading scientific schools [NSh-9249.2016.5]
Место публикации : Dokl. Biochem. Biophys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2018. - Vol. 481, Is. 1. - С. 195-197. - ISSN 1607-6729, DOI 10.1134/S160767291804004X. - ISSN 1608-3091(eISSN)
Примечания : Cited References:15. - This work was supported by the Russian Foundation for Basic Research (project no. 16-04-01248), project of the Russian Academy of Sciences no. II.2P/VI.51-1, the State Task of the Ministry of Education and Science of the Russian Federation to the Siberian Federal University for research (no. 6.1504.2017/PCh), and the program of the President of the Russian Federation for state support of leading scientific schools (project no. NSh-9249.2016.5).
Предметные рубрики: FATTY-ACIDS
WATER
INSECTS
EXPORT
LAND
EMERGENCE
BIOMASS
FLUXES
Аннотация: The flow of long-chain polyunsaturated fatty acids (PUFAs) of the omega-3 family, namely, eicosapentaenoic acid (20:5n-3, EPA) and docosahexaenoic acid (22:6n-3, DHA), exported by amphibian metamorphs from water to terrestrial ecosystems in the Medveditsa River floodplain, was quantified for the first time. The total biomass export by three amphibian species (Pelobates fuscus, Bombina bombina, and Pelophylax ridibundus) per unit area of the lake surface was 0.594 g/m(2) per year (as a mean for 2 years). The biomass flow per unit area of land was 0.726 g/ha per year (0.302 g/ha per year for organic carbon) in 2015-2016. The average annual total removal of EPA + DHA by amphibians from the floodplain lake was 1.47 mg/m(2) of water surface area. Due to the high content of EPA and DHA in biomass, amphibians are potentially a valuable food for terrestrial predators having no access to other sources of essential PUFAs.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhutova O. N., Shulepina S. P., Sharapova T. A., Kolmakova A. A., Glushchenko L. A., Kravchuk E. S., Gladyshev M. I.
Заглавие : Intraspecies variability of fatty acid content and composition of a cosmopolitan benthic invertebrate, Gammarus lacustris
Место публикации : Inland Waters: Taylor and Francis Ltd., 2018. - Vol. 8, Is. 3. - С. 356-367. - ISSN 20442041 (ISSN) , DOI 10.1080/20442041.2018.1487157
Ключевые слова (''Своб.индексиров.''): essential polyunsaturated fatty acids--fish--food quality--salinity--temperature
Аннотация: Aquatic invertebrates are valuable dietary sources of essential polyunsaturated fatty acids, eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3), for fish. Phylogeny, diet, and various ecological factors affect the fatty acid composition of aquatic invertebrates. We focused our study on the effect of ecological factors to a cosmopolitan species inhabiting lakes that differed in salinity, temperature, and presence/absence of predators (fish). To avoid the effect of phylogeny, which strongly influences the fatty acid composition of animals, we studied several populations of one cosmopolitan benthic species, Gammarus lacustris Sars. We found that differences in fatty acid percentages of G. lacustris were mainly affected by differences in their diets. Some populations preferred dinoflagellates, cryptophytes, green algae/cyanobacteria, and bacteria; other populations selected diatoms; and still other populations consumed zooplankton or allochthonous (terrestrial) organic matter. The salinity and presence/absence of fish affected the contents of EPA and DHA in G. lacustris. Populations from saline and fishless lakes had significantly higher contents of EPA and DHA. Thus, stocking of fishless lakes dominated by G. lacustris with fish could lead to a decrease in EPA and DHA contents in the gammarids. We propose that some saline and fishless lakes could be used as a source of gammarids for aquaculture fish feeding. © 2018, © 2018 International Society of Limnology (SIL).
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kotlobay A. A., Sarkisyan K. S., Mokrushina Y. A., Marcet-Houben M., Serebrovskaya E. O., Markina N. M., Somermeyer L. G., Gorokhovatsky A. Y., Vvedensky A., Purtov K. V., Petushkov V. N., Rodionova N. S., Chepurnyh T. V., Fakhranurova L. I., Guglya E. B., Ziganshin R., Tsarkova A. S., Kaskova Z. M., Shender V., Abakumov M., Abakumova T. O., Povolotskaya I. S., Eroshkin F. M., Zaraisky A. G., Mishin A. S., Dolgov S. V., Mitiouchkina T. Y., Kopantzev E. P., Waldenmaier H. E., Oliveira A. G., Oba Y., Barsova E., Bogdanova E. A., Gabaldon T., Stevani C. V., Lukyanov S., Smirnov I. V., Gitelson J. I., Kondrashov F. A., Yampolsky I. V.
Заглавие : Genetically encodable bioluminescent system from fungi
Место публикации : Proc. Natl. Acad. Sci. U. S. A.: National Academy of Sciences, 2018. - Vol. 115, Is. 50. - С. 12728-12732. - ISSN 00278424 (ISSN) , DOI 10.1073/pnas.1803615115
Ключевые слова (''Своб.индексиров.''): bioluminescence--fungal luciferase--fungal luciferin biosynthesis
Аннотация: Bioluminescence is found across the entire tree of life, conferring a spectacular set of visually oriented functions from attracting mates to scaring off predators. Half a dozen different luciferins, molecules that emit light when enzymatically oxidized, are known. However, just one biochemical pathway for luciferin biosynthesis has been described in full, which is found only in bacteria. Here, we report identification of the fungal luciferase and three other key enzymes that together form the biosynthetic cycle of the fungal luciferin from caffeic acid, a simple and widespread metabolite. Introduction of the identified genes into the genome of the yeast Pichia pastoris along with caffeic acid biosynthesis genes resulted in a strain that is autoluminescent in standard media. We analyzed evolution of the enzymes of the luciferin biosynthesis cycle and found that fungal bioluminescence emerged through a series of events that included two independent gene duplications. The retention of the duplicated enzymes of the luciferin pathway in nonluminescent fungi shows that the gene duplication was followed by functional sequence divergence of enzymes of at least one gene in the biosynthetic pathway and suggests that the evolution of fungal bioluminescence proceeded through several closely related stepping stone nonluminescent biochemical reactions with adaptive roles. The availability of a complete eukaryotic luciferin biosynthesis pathway provides several applications in biomedicine and bioengineering. © 2018 National Academy of Sciences. All Rights Reserved.
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14.

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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15.

Вид документа : Статья из сборника (выпуск монографической серии)
Шифр издания :
Автор(ы) : Zadereev, Egor, Lopatina, Tatiana S.
Заглавие : The Role of Chemical Interactions in Embryonic Diapause Induction in Zooplankton
Колич.характеристики :11 с
Место публикации : Monogr. Biol.: SPRINGER INTERNATIONAL PUBLISHING AG, 2019. - Vol. 92. - С. 175-185. - (Monographiae Biologicae). - , DOI 10.1007/978-3-030-21213-1_10
Примечания : Cited References:60
Предметные рубрики: MOINA-MACROCOPA CLADOCERA
PREDATOR-INDUCED DIAPAUSE
SEXUAL
Аннотация: Production of resting eggs in zooplankton is controlled by multiple stimuli. In this chapter, we briefly discussed published data that confirm the effect of infochemicals produced by conspecifics, competitors, predators or preys on the production of resting eggs in zooplankton. We found that the effect of conspecific chemicals on the production of resting eggs is the most convincing. Both experimental data and theoretical research demonstrated that this density-dependent reaction often results in a competitive advantage of individuals in the population that follows such a strategy. The data on the effect of chemicals exuded by competitors or predators are controversial. Data on the effect of chemical interaction on the production of resting eggs in natural habitats are almost absent. Most of the studies of chemical interactions are performed with individuals in laboratory experiments with crowded water. Crowded water is water that contains chemicals exuded by the population. Even though this method has the number of drawbacks, it is still widely used in similar studies. There are several studies focused on the identification of the chemical nature of cues responsible for the production of resting eggs in zooplankton. Most probably, chemicals involved are short proteins. However, the exact identification of the chemicals responsible for the production of resting eggs in zooplankton remains an open task. In order to place chemical interactions into a framework of multiple diapause control theory, it is necessary to determine the nature of chemicals involved and to demonstrate population- and ecosystem-level consequences of this phenomenon in natural habitats.
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