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Predictive radioecological mathematical model of the Yenisei river / A. G. Degermendzhi, L. G. Kosolapova, V. M. Belolipetskij // Radiatsionnaya Biologiya. Radioekologiya. - 2002. - Vol. 42, Is. 4. - С. 433-439 . - ISSN 0869-8031
Кл.слова (ненормированные):
Cesium -- Contamination -- Mathematical models -- Phosphorus -- Radioisotopes -- River pollution -- Cesium 137 -- Phosphorus 32 -- Radioecology -- The Yenisei river -- Ecosystems -- Bacteria (microorganisms) -- fresh water -- article -- ecosystem -- pollutant -- Russian Federation -- theoretical model -- Ecosystem -- Fresh Water -- Models, Theoretical -- Radioactive Pollutants -- Russia
Аннотация: A one-dimensional mathematical model of the Yenisei river ecosystem including hydrological, ecosystem and radioecologicl blocks has been developed. The model was used to evaluate contribution of different processes (transfer by water masses, dilution, radioactive decay, bioaccumulation) into self-purification of the river water from a radiation pollution. The pollution density of ecosystem components (bacteria, phyto-, zooplankton, phyto-, zoobenthos, detritus) with 137Cs and 32P is calculated.

Scopus
Держатели документа:
Inst. of Biophysics, Siberian Branch, RAS, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Degermendzhi, A.G.; Kosolapova, L.G.; Belolipetskij, V.M.

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A general one-dimensional vertical ecosystem model of Lake Shira (Russia, Khakasia): Description, parametrization and analysis / I. G. Prokopkin [et al.] // Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - P585-618, DOI 10.1007/s10452-010-9326-8 . - ISSN 1386-2588
Кл.слова (ненормированные):
Meromictic brackish lake -- One-dimensional vertical ecological model -- Sensitivity analysis -- alga -- biomass -- brackish water -- diffusion -- ecosystem modeling -- meromictic lake -- microbial community -- model test -- nutrient -- one-dimensional modeling -- parameterization -- phytoplankton -- seasonality -- sensitivity analysis -- solar radiation -- vertical profile -- water chemistry -- water temperature -- zooplankton -- Khakassia -- Lake Shira -- Russian Federation -- algae
Аннотация: A one-dimensional ecological model of the meromictic brackish Lake Shira (Russia, Khakasia) was developed. The model incorporates state-of-the-art knowledge about the functioning of the lake ecosystem using the most recent field observations and ideas from PCLake, a general ecosystem model of shallow freshwater lakes. The model of Lake Shira presented here takes into account the vertical dynamics of biomasses of the main species of algae, zooplankton and microbial community, as well as the dynamics of oxygen, detritus, nutrients and hydrogen sulphide from spring to autumn. Solar radiation, temperature and diffusion are modelled using real meteorological data. The parameters of the model were calibrated to the field data, after applying different methods of sensitivity analysis to the model. The resulting patterns of phytoplankton and nutrients dynamics show a good qualitative and quantitative agreement with the field observations during the whole summer season. Results are less satisfactory with respect to the vertical distribution of zooplankton biomass. We hypothesize that this is due to the fact that the current model does not take the sex and age structure of zooplankton into account. The dynamics of oxygen, hydrogen sulphide and the modelled positions of the chemocline and thermocline are again in good agreement with field data. This resemblance confirms the validity of the approach we took in the model regarding the main physical, chemical and ecological processes. This general model opens the way for checking various hypotheses on the functioning of the Lake Shira ecosystem in future investigations and for analysing options for management of this economically important lake. В© 2010 Springer Science+Business Media B.V.

Scopus
Держатели документа:
Institute of Biophysics, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Netherlands Institute of Ecology, Centre for Limnology, Rijksstraatweg 6, 3631 AC Nieuwersluis, Netherlands
Netherlands Environmental Assessment Agency (PBL), Postbus 303, 3720 AH Bilthoven, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Prokopkin, I.G.; Mooij, W.M.; Janse, J.H.; Degermendzhy, A.G.

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Small lake plankton and its essential polyunsaturated fatty acids content as affected by a colony of the common heron (Ardea cinerea L.) / A. V. Krylov [et al.] // Contemporary Problems of Ecology. - 2011. - Vol. 4, Is. 1. - P42-49, DOI 10.1134/S1995425511010073 . - ISSN 1995-4255
Кл.слова (ненормированные):
Essential polyunsaturated fatty acids -- Heron -- Plankton community -- Shallow lake -- anthropogenic effect -- colony structure -- community structure -- detritus -- diatom -- eutrophication -- fatty acid -- habitat type -- lake -- nutrition -- seston -- wader -- zooplankton -- Ardea cinerea -- Aves -- Bacillariophyta
Аннотация: 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 registered when human influence increases. The composition and content of polyunsaturated fatty acids in seston and zooplankton show that diatoms and detritus of land genesis play relatively smaller role in the zooplankton nutrition in the lake area influenced by the birds. The zooplankton developing in this zone is a better food rich in essential docosahexaenoic acid necessary for the growth and development of the fish. В© 2011 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Papanin Institute of Biology of Inner Waters, Russian Academy of Sciences, Borok, Yaroslavl oblast 152742, Russian Federation
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk 660041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Krylov, A.V.; Gladyshev, M.I.; Kosolapov, D.B.; Sushchik, N.N.; Korneva, L.G.; Makhutova, O.N.; Kulakov, D.V.; Kalacheva, G.S.; Dubovskaya, O.P.

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Fatty acid analyses reveal high degrees of omnivory and dietary plasticity in pond-dwelling tadpoles / M. R. Whiles [et al.] // Freshwater Biology. - 2010. - Vol. 55, Is. 7. - P1533-1547, DOI 10.1111/j.1365-2427.2009.02364.x . - ISSN 0046-5070
Кл.слова (ненормированные):
Anura -- Diet -- Food web -- Foraging -- Gut contents -- Omnivory -- Selective feeding -- Amphibia -- Anura -- Bacteria (microorganisms) -- Hexapoda -- Lithobates -- Pseudacris crucifer
Аннотация: 1. Understanding the trophic relationships of consumers is central to ecology, but constructing meaningful food webs is often difficult because of a lack of detailed information on consumption versus assimilation and high degrees of omnivory.2. We used fatty acid analyses to examine the trophic relationships of three common larval anurans (Pseudacris crucifer, Lithobates catesbeianus and Lithobates clamitans) that are often classified as grazers or detritivores. Tadpoles and potential food sources were sampled in four ponds in southern Illinois and analysed for fatty acid composition. Single linkage cluster analysis was then used to compare fatty acid profiles among tadpole gut contents, tadpole muscle tissues and available food resources.3. Diets varied among species and within species among ponds, but organic sediments consistently contributed most to the fatty acid composition of the gut contents of all species. Fatty acid profiles also indicated that larval insects and phytoplankton were consumed by both L. catesbeianus and L. clamitans in one pond, while L. clamitans and P. crucifer consumed mainly periphyton along with sediments in another pond, and these diet differences appeared linked to physical differences among ponds, with periphyton and/or phytoplankton contributing more to tadpole diets in less shaded ponds.4. The fatty acid composition of muscle tissues of L. clamitans, the dominant tadpole in these systems, indicated that plant detritus and bacteria, which were the dominant components of organic sediments in the ponds, were common components of the assimilatory diet.5. Results demonstrate the utility of fatty acid analyses for assessing both consumption and assimilation. The tadpole assemblages we examined derive much of their energy from heterotrophic and allochthonous sources and exhibit high dietary plasticity. This information will allow for more accurate and comprehensive assessments of trophic interactions in freshwater habitats, as well as aid in amphibian conservation, management and captive propagation efforts. В© 2009 Blackwell Publishing Ltd.

Scopus
Держатели документа:
Department of Zoology, Center for Ecology, Illinois Fisheries and Aquaculture Center, Southern Illinois University, Carbondale, IL, United States
Institute of Biophysics of Siberian Branch of the Russian Academy of Science, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, Russian Federation
Department of Biology, Clarion University of Pennsylvania, Clarion, PA, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Whiles, M.R.; Gladyshev, M.I.; Sushchik, N.N.; Makhutova, O.N.; Kalachova, G.S.; Peterson, S.D.; Regester, K.J.

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Seasonal distribution and fatty acid composition of littoral microalgae in the Yenisei River / N. N. Sushchik [et al.] // Journal of Applied Phycology. - 2010. - Vol. 22, Is. 1. - P11-24, DOI 10.1007/s10811-009-9418-9 . - ISSN 0921-8971
Кл.слова (ненормированные):
Fatty acids -- Riverine microalgae -- Taxa composition -- Temperature adaptations -- algae -- Bacillariophyta -- Chlorophyta -- Cyanobacteria
Аннотация: We studied fatty acid (FA) composition of littoral microalgae in the fast-flowing oligotrophic river, the Yenisei, Siberia, monthly for 3 years. Seasonal dynamics of species composition had similar patterns in all the studied years. In springs, a pronounced dominance of filamentous green algae occurred, in summer and autumn diatoms were abundant, and in late autumn and winter epilithic biofilms consisted primarily of cyanobacteria and detritus. In general, FA composition of the algal periphytic community was dominated by 16:0, 16:1?7, 20:5?3, 14:0, and 18:3?3 throughout the studied period. Several groups of FAs, which had peculiar seasonal dynamics, were differentiated by statistical analysis based on a method of correlation graphs. The seasonal changes in FA composition could be partly explained by the seasonal succession of species composition of the community. Besides, we found that populations of both diatom and green algae grown in summer at a higher water temperature were lower in polyunsaturated fatty acids than those in spring, at a lower temperature. Hence, we suppose that the regular seasonal dynamics of FA composition of the studied littoral microalgae was driven both by changes in species composition and by temperature adaptations of the algal populations. The highest content of essential polyunsaturated FAs, eicosapentaenoic and docosahexaenoic acids, in the spring "psychrophilic" populations of diatoms could make them of the higher nutritive value for zoobenthic primary consumers. В© Springer Science+Business Media B.V. 2009.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk 660041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Sushchik, N.N.; Gladyshev, M.I.; Ivanova, E.A.; Kravchuk, E.S.

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Seasonal correlations of elemental and ?3 PUFA composition of seston and dominant phytoplankton species in a eutrophic Siberian Reservoir / M. I. Gladyshev [et al.] // Aquatic Ecology. - 2007. - Vol. 41, Is. 1. - P9-23, DOI 10.1007/s10452-006-9040-8 . - ISSN 1386-2588
Кл.слова (ненормированные):
Elemental stoichiometry -- Phytoplankton -- Polyunsaturated fatty acids -- Seston -- carbon -- dominance -- eutrophic environment -- fatty acid -- nitrogen -- nutritional requirement -- nutritive value -- phosphorus -- phytoplankton -- seasonal variation -- seston -- zooplankton -- Eurasia -- Siberia -- Anabaena -- Bacillariophyta -- Cyanobacteria -- Gomphosphaeria -- Peridinium -- Planktothrix -- Stephanodiscus
Аннотация: The elemental and fatty acid composition of seston was studied for 3 years, from May to October, in a small Reservoir. Under comparatively low C:P ratio, multivariate canonical analysis revealed no straightforward simple correlations between phosphorus and single ?3 PUFA species, but complex significant interaction between elemental composition (stoichiometry) of seston and total sestonic ?3 PUFA as a whole. Since sestonic C, P and N were found to originate mostly from phytoplankton, the contents of particulate elements and PUFA were attributed to single species in periods of their pronounced dominance. Phytoplankton species of genera of Stephanodiscus, Peridinium, Gomphosphaeria, Planktothrix and Anabaena in periods of their pronounced dominance had relatively constant species-specific elemental and PUFA composition. Phytoplankton species significantly differed in their elemental and PUFA composition, as well as in ratios of C:N, N:P, PUFA:P and partly C:P that indicate food quality for zooplankton. Hence, there were no phytoplankton species of clearly high or low nutritional value. All of phytoplankters, or at least detritus, that originated from them, may meet specific elemental and biochemical requirements of specific groups of zooplankton. Dividing phytoplankton on basis of their elemental and biochemical composition, i.e., nutrition quality, into large taxa (cyanobacteria, diatoms, etc.) appeared to be too coarse for assessing nutritional value for zooplankton. В© Springer Science+Business Media B.V. 2006.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Krasnoyarsk State University, Svobodny av. 79, Krasnoyarsk 660041, Russian Federation
Krasnoyarsk State Agricultural University, Mira av., 88, Krasnoyarsk 660049, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gladyshev, M.I.; Sushchik, N.N.; Kolmakova, A.A.; Kalachova, G.S.; Kravchuk, E.S.; Ivanova, E.A.; Makhutova, O.N.

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Phytoplankton diet of Arctodiaptomus salinus (Copepoda, Calanoida) in Lake Shira (Khakasia) / A. P. Tolomeyev // Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - P229-234, DOI 10.1023/A:1015618104520 . - ISSN 1386-2588
Кл.слова (ненормированные):
Arctodiaptomus salinus -- Food selectivity -- Phytoplankton -- diet -- food selection -- phytoplankton -- saline lake -- zooplankton -- Russian Federation -- algae -- Animalia -- Arctodiaptomus -- Calanoida -- Copepoda -- Cyanobacteria -- Eukaryota -- Invertebrata -- Lyngbya -- Lyngbya contorta -- Microcystis -- Microcystis sp.
Аннотация: A flow-through method was employed to study the algal part of the diet spectrum of the calanoid Arctodiaptomus salinus in the surface layer of the lake and in the phytoplankton biomass maximum zone (10 m deep). Daily consumption rates of this calanoid differed markedly in these layers, being 1 and 11 ?g ind -1 d-1 respectively. The cyanobacterial taxa, Lyngbya contorta and Microcystis sp., accounted for more than a half of the ration. Nevertheless, the negative Ivlev electivity coefficient indicated that Arctodiaptomus prefers none of these two taxa. The low measured uptakes suggest that the energy expenditure is compensated by other resources, presumably microzooplankton and detritus.

Scopus
Держатели документа:
Institute of Biophysics of SB RAS, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tolomeyev, A.P.

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Kinetic characteristics of the theoretical ecosystems with different extent of openness / Ya. V. Galayda [et al.] // Advances in Space Research. - 2005. - Vol. 35, Is. 9 SPEC. ISS. - P1516-1520, DOI 10.1016/j.asr.2005.01.034 . - ISSN 0273-1177
Кл.слова (ненормированные):
Mathematic modeling -- Net primary production -- Residual concentration of biogenic limiting substances -- Trophic chain length -- Mathematic modeling -- Net primary production -- Residual concentration of biogenic limiting substances -- Trophic chain length -- Characterization -- Degradation -- Kinetic theory -- Mathematical models -- Nitrogen -- Phosphorus -- Recycling -- Surface waters -- Ecosystems -- biological model -- biomass -- bioremediation -- conference paper -- ecosystem -- food chain -- microclimate -- Biodegradation, Environmental -- Biomass -- Ecological Systems, Closed -- Ecosystem -- Food Chain -- Life Support Systems -- Models, Biological
Аннотация: In this paper, the influence of the extent of openness of ecosystem that is defined by the dilution rate, which characterizes the extent of flowage of the pond, on the intensity of the biotic circulation in ecosystems with different regulation types, number of trophic links and extent of closing has been investigated. We considered open systems, we took into account the return of the limiting substances, such as nitrogen and phosphorous, into the cycle by degradation of detritus and products of vital functions of consumers. It was shown by the numerical calculations that the increase of the dilution rate in without recycle ecosystems leads to increase of the net primary production up to the maximum value corresponding to the two-link trophic chain (biogenic substance and producer) and then, to gradually decrease. The residual concentration of biogenic limiting substances monotone increases. Net primary production and residual concentration of biogenic limiting substances in systems with recycle with even number of links behaves similarly to that in without recycle ecosystems. In the systems with recycle with the odd number of links that values lies on the stable level. We showed that in wide range of the dilution rate the recycling of the ecosystem can highly increase the net primary production and reduce residual concentration of biogenic limiting substances. The influence of the dilution rate on numbers of links that may exist in the system was analyzed. В© 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Krasnoyarsk State University, Svobodny 79, Krasnoyarsk 660041, Russian Federation
Institute of Biophysics, SB, RAS, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Galayda, Ya.V.; Pechurkin, N.S.; Shirobokova, I.M.; Pisman, T.I.

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Population dynamics of an algal-bacterial cenosis in closed ecological system [Text] / T. I. Pisman, Y. V. Galayda, N. S. Loginova ; ed. YV Galayd // SPACE LIFE SCIENCES: CLOSED ECOLOGICAL SYSTEMS: EARTH AND SPACE APPLICATIONS. Ser. ADVANCES IN SPACE RESEARCH : PERGAMON-ELSEVIER SCIENCE LTD, 2005. - Vol. 35: Workshop on Closed Ecological Systems (JUL, 2004, Paris, FRANCE), Is. 9. - P1579-1583, DOI 10.1016/j.asr.2005.03.073. - Cited References: 14 . - ISBN 0273-1177

РУБ Engineering, Aerospace + Astronomy & Astrophysics + Ecology + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Кл.слова (ненормированные):
microalgae-bacteria relationships -- photosynthates -- detritus -- Chlorella -- biotic cycle
Аннотация: The paper deals with microalgae-bacteria interrelationships in the "autotroph-heterotroph" aquatic biotic cycle. Explanations of why and how algal-bacterial ecosystems are formed still remain controversial. The paper presents results of experimental and theoretical investigations of the functioning of the algal-bacterial cenosis (the microalga Chlorella vulgaris and concomitant microflora). The Chlorella microbial community is dominated by representatives of the genus Pseudomonas. Experiments with non-sterile batch cultures of Chlorella on Tamiya medium showed that the biomass of microorganisms increases simultaneously with the increase in microalgal biomass. The microflora of Chlorella can grow on organic substances released by photosynthesizing Chlorella. Microorganisms can also use dying Chlorella cells, i.e. form a "producer-reducer" biocycle. To get a better insight into the cenosis-forming role of microalgae, a mathematical model of the "autotroph-heterotroph" aquatic biotic cycle has been constructed, taking into account the utilization of Chlorella photosynthates and dead cells by microorganisms and the contribution of the components to the nitrogen cycle. A theoretical study showed that the biomass of concomitant bacteria grown on glucose and detritus is larger than the biomass of bacteria utilizing only microalgal photosynthates, which agrees well with the experimental data. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.

Держатели документа:
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
RAS, SB, Inst Biophys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Med Acad, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Pisman, T.I.; Galayda, Y.V.; Loginova, N.S.; Galayd, YV \ed.\

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10.

Study of non-consumptive mortality of Crustacean zooplankton in a Siberian reservoir using staining for live/dead sorting and sediment traps [Text] / O. P. Dubovskaya [et al.] // Hydrobiologia. - 2003. - Vol. 504: 4th International Conference on Reservoir Limnology and Water Quality (AUG, 2002, CESKE BUDEJOVICE, CZECH REPUBLIC), Is. 01.03.2013. - P. 223-227, DOI 10.1023/B:HYDR.0000008522.88010.45. - Cited References: 19 . - ISSN 0018-8158

РУБ Marine & Freshwater Biology
Рубрики:
SEASONAL DYNAMICS
   MIDSUMMER DECLINE
   DAPHNIA
   DETRITUS
   FISH
   POND
Кл.слова (ненормированные):
Cyclops vicinus -- Daphnia -- live/dead sorting -- non-consumptive mortality -- sedimentation
Аннотация: We studied non-consumptive (non-predatory) mortality of Daphnia and Cyclops vicinus during four sampling seasons. Mortality estimations were based on live/dead sorting using special staining and measurements of sedimentation rates for dead individuals, depended on wind speed. Original equations were used for calculations. The estimated specific non-consumptive mortality never had biologically senseless negative values, which were often obtained on the basis of the other ways of mortality estimations, and was in a good agreement with other components of population dynamics. As found, the non-consumptive mortality was the important, often the determinant component of the zooplankton population dynamics.

WOS
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660042, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Dubovskaya, O.P.; Gladyshev, M.I.; Gubanov, V.G.; Makhutova, O.N.

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11.

Evaluation of non-predatory mortality of two Daphnia species in a Siberian reservoir [Text] / M. I. Gladyshev [et al.] // J. Plankton Res. - 2003. - Vol. 25, Is. 8. - P. 999-1003, DOI 10.1093/plankt/25.8.999. - Cited References: 24 . - ISSN 0142-7873

РУБ Marine & Freshwater Biology + Oceanography
Рубрики:
SEASONAL DYNAMICS
   MIDSUMMER DECLINE
   ZOOPLANKTON
   POND
   POPULATION
   PREDATION
   DETRITUS
   FISH
   LAKE
   TRAP
Аннотация: A new method of estimating non-predatory mortality of zooplankton based on live/dead sorting and sediment trap measurement is described. Preliminary results on Daphnia cucullata and Daphnia longispina are given. Estimations of average non-predatory mortality demonstrated a significant contribution of this kind of mortality to total mortality.

WOS
Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660042, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Gladyshev, M.I.; Dubovskaya, O.P.; Gubanov, V.G.; Makhutova, O.N.

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12.

Analysis of fatty acid composition revealed differences in the diets of tadpoles of two amphibian species / Y. Y. Dgebuadze [et al.] // Dokl. Biochem. Biophys. - 2017. - Vol. 472, Is. 1. - P31-34, DOI 10.1134/S1607672917010082. - Cited References:15. - This study was supported by the State task within the framework of the basic research program of the Russian Federation (subject no. 51.1.1), the Grant Council of the President of the Russian Federation for State Support of Leading Scientific Schools (project no. NSh-9249.2016.5), and partly by the Russian Foundation for Basic Research (project nos. 16-04-01248 and 16-34-00119 mol_a). . - ISSN 1607-6729. - ISSN 1608-3091

РУБ Biochemistry & Molecular Biology + Biophysics
Рубрики:
ECOLOGY
Аннотация: The study of the composition of fatty acid markers of tadpoles of cohabiting amphibian species for the first time revealed differences in their diets: the moor frog Rana arvalis prefers bacteria not associated with plant detritus, whereas the diet of the common spadefoot Pelobates fuscus is based on cyanobacteria, green algae, diatoms, and possibly higher plants. Major differences in the fatty acid composition are determined by the difference in the percentage of eicosapentaenoic and myristic acids.

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Scopus
Держатели документа:
Russian Acad Sci, Severtsov Inst Ecol & Evolut, Moscow 119071, Russia.
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Privolzhskaya Lesostep State Nat Reserve, Penza, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Dgebuadze, Yu. Yu.; Sushchik, N. N.; Bashinskiy, I. V.; Makhutova, O. N.; Kalacheva, G. S.; Osipov, V. V.; Gladyshev, M. I.; basic research program of the Russian Federation [51.1.1]; Grant Council of the President of the Russian Federation for State Support of Leading Scientific Schools [NSh-9249.2016.5]; Russian Foundation for Basic Research [16-04-01248, 16-34-00119 mol_a]

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13.

Biological aspects of the associations of biting midges (Diptera: Ceratopogonidae) in two saline rivers of the Elton Lake Basin, Russia / L. V. Golovatyuk [et al.] // Mar. Freshw. Res. - 2018. - Vol. 69, Is. 6. - P906-916, DOI 10.1071/MF17125 . - ISSN 1323-1650
Кл.слова (ненормированные):
biomarker fatty acids -- ceratopogonid larvae -- saline rivers -- secondary production -- algae -- Bacillariophyta -- Ceratopogonidae -- Diptera -- Palpomyia
Аннотация: We studied species composition, density, biomass and production of larvae of the family Ceratopogonidae in two saline rivers (Volgograd region, Russia). Ceratopoponids make up an important part of macroinvertebrate community in these rivers. Average monthly production (dry weight) of ceratopogonid larvae in the rivers was 3.5-4.8 g m -2 month -1 in May and ?0.9 g m -2 month -1 in August. For the first time, feeding spectra of ceratopogonid larvae, Palpomyia schmidti Goetghebuer, 1934, was studied using fatty acid analyses. The larvae of P. schmidti appeared to selectively consume diatoms and other algae and to avoid bacteria and decomposed dead organic matter (detritus) of low nutritive quality. © CSIRO.

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Держатели документа:
Institute of Ecology of the Volga River Basin, Russian Academy of Sciences, Komzina Street 10, Togliatti, Russian Federation
Institute of Biophysics of Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny Avenue 79, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Golovatyuk, L. V.; Zinchenko, T. D.; Sushchik, N. N.; Kalachova, G. S.; Gladyshev, M. I.

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14.

A model study of the effect of weather forcing on the ecology of a meromictic Siberian lake / I. G. Prokopkin, E. S. Zadereev // J. Oceanology Limnology. - 2018, DOI 10.1007/s00343-018-7329-9 . - Article in press. - ISSN 2096-5508
Кл.слова (ненормированные):
food web -- meromictic lake -- numerical model -- sensitivity analysis -- stratification -- weather forcing
Аннотация: We used a Lake Shira numerical model to estimate the response of the ecosystem of a saline meromictic lake to variations in weather parameters during the growing season. The sensitivity analysis of the model suggests that compared to other external (nutrient inflows) and internal (spring biomasses of food-web components) factors, weather parameters are among the most influential for both mixolimnetic (phyto- and zooplankton) and monimolimnetic (purple sulfur bacteria, sulfur reducing bacteria and hydrogen sulfide) food-web components. Calculations with different weather scenarios shows how changes in the water temperature and mixing depth affect mixolimnetic and monimolimnetic food-web components and the depth of the oxic-anoxic interface in a meromictic lake. When weather forcing stimulates an increase in the biomass of food-web components in the mixolimnion, it produces cascading effects that lead to three results: 1) a higher content of detritus in the water column; 2) a higher content of hydrogen sulfide in the monimolimnion; 3) raising of the oxic-anoxic interface closer to the water-air surface. This cascading effect is complicated by the negative correlation between two light dependent primary producers located at different depths—phytoplankton in the mixolimnion and purple sulfur bacteria at the oxic-anoxic interface. Thus, weather conditions that stimulate higher phytoplankton biomass are associated with a higher detritus content and lower biomass of purple sulfur bacteria, a higher content of hydrogen sulfide and a shallower oxic-anoxic interface. The same weather conditions (higher wind, lower cloud cover, and lower air temperature) promote a scenario of less stable thermal stratification. Thus, our calculations suggest that weather parameters during the summer season strongly control the mixing depth, water temperature and the mixolimnetic food web. An effect of biogeochemical and physical interactions on the depth of the oxicanoxic interface is also detectable. However, intra- and interannual climate and weather effects will be more important for the control of meromixis stability. © 2018, Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature.

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Держатели документа:
Institute of Biophysics SB RAS, Krasnoyarsk Scientific Center, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodnii av. 79, Krasnoyarsk, 660079, Russian Federation

Доп.точки доступа:
Prokopkin, I. G.; Zadereev, E. S.

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