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Vertical stratification of physical, chemical and biological components in two saline lakes Shira and Shunet (South Siberia, Russia) / A. G. Degermendzhy [et al.] // Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - P619-632, DOI 10.1007/s10452-010-9336-6 . - ISSN 1386-2588
Кл.слова (ненормированные):
Ciliates -- Cryptomonas -- Fishless lakes -- Gammarus -- Mathematical modelling -- Meromictic lakes -- Phytoplankton -- Stratification -- Sulphur bacteria -- amphipod -- bacterium -- biomass -- ciliate -- ecosystem modeling -- flagellate -- meromictic lake -- microbial community -- numerical model -- physicochemical property -- phytoplankton -- population density -- saline lake -- salinity -- stratification -- thermocline -- trophic interaction -- vertical profile -- zooplankton -- Khakassia -- Lake Shira -- Lake Shunet -- Russian Federation -- Siberia -- Amphipoda -- Bacteria (microorganisms) -- Ciliophora -- Copepoda -- Cryptomonas -- Cryptomonas sp. -- Gammaridae -- Gammarus -- Gammarus lacustris -- Phytomastigophorea -- Protista -- Rotifera
Аннотация: A feature of meromictic lakes is that several physicochemical and biological gradients affect the vertical distribution of different organisms. The vertical stratification of physical, chemical and biological components in saline, fishless meromictic lakes Shira and Shunet (Siberia, Russia) is quite different mainly because both mean depth and maximum depth of lakes differ as well as their salinity levels differ. The chemocline of the Lake Shira, as in many meromictic lakes, is inhabited by bacterial community consisting of purple sulphur and heterotrophic bacteria. As the depth of the chemocline is variable, the bacterial community does not attain high densities. The mixolimnion in Lake Shira, which is thermally stratified in summer, also creates different habitat for various species. The distribution of phytoplankton is non-uniform with its biomass peak in the metalimnion. The distribution of zooplankton is also heterogeneous with rotifers and juvenile copepods inhabiting the warmer epilimnion and older copepods found in the cold but oxic hypolimnion. The amphipod Gammarus lacustris which can be assigned to the higher trophic link in the fishless lake's ecosystem, such as Lake Shira, is also distributed non-uniformly, with its peak density generally observed in the thermocline region. The chemocline in Lake Shunet is located at the depth of 5 m, and unlike in Lake Shira, due to a sharp salinity gradient between the mixolimnion and monimolimnion, this depth is very stable. The mixolimnion in Lake Shunet is relatively shallow and the chemocline is inhabited by (1) an extremely dense bacterial community; (2) a population of Cryptomonas sp.; and (3) ciliate community comprising several species. As the mixolimnion of Lake Shunet is not thermally stratified for long period, the phytoplankton and zooplankton populations are not vertically stratified. The gammarids, however, tend to concentrate in a narrow layer located 1-2 m above the chemocline. We believe that in addition to vertical inhomogeneities of both physicochemical parameters, biological and physical factors also play a role in maintaining these inhomogeneities. We conclude that the stratified distributions of the major food web components will have several implications for ecosystem structure and dynamics. Trophic interactions as well as mass and energy flows can be significantly impacted by such heterogeneous distributions. Species spatially separated even by relatively short distances, say a few centimetres will not directly compete. Importantly, we demonstrate that not only bacteria, phytoflagellates and ciliate tend to concentrate in thin layers but also larger-sized species such Gammarus (amphipods) can also under certain environmental conditions have stratified distribution with maxima in relatively thin layer. As the vertical structure of the lake ecosystem is rather complex in such stratified lakes as ours, the strategy of research, including sampling techniques, should consider potentially variable and non-homogeneous distributions. В© 2010 The Author(s).

Scopus
Держатели документа:
Institute of Biophysics SB RAS, 660036 Krasnoyarsk, Akademgorodok, Russian Federation
Siberian Federal University, Svobodnyi 79, 660041 Krasnoyarsk, Russian Federation
Netherlands Environmental Assessment Agency (PBL), P.O. Box 303, 3720 AH Bilthoven, Netherlands
Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), 3631 AC Nieuwersluis, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Degermendzhy, A.G.; Zadereev, E.S.; Rogozin, D.Y.; Prokopkin, I.G.; Barkhatov, Y.V.; Tolomeev, A.P.; Khromechek, E.B.; Janse, J.H.; Mooij, W.M.; Gulati, R.D.

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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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Comparative investigation of polyhydroxyalkanoate scaffolds with various chemical compositions / E. D. Nikolaeva [и др.] // Cellular Transplantation and Tissue Engineering. - 2011. - Vol. 6, Is. 4. - С. 54-63 . - ISSN 1815-445X
Кл.слова (ненормированные):
Biopolymers -- Scaffolds -- Tissue engineering
Аннотация: The authors have constructed and characterized a series of membranes based on resorbable polyhydroxyalkanoates of different compositions. Five PHA types have been studied: a homopolymer of 3-hydroxybutyric acid, copolymers of 3-hydroxybutyric and 4-hydroxybutyric acids, 3-hydroxybutyric and 3-hydroxyvaleric acids, 3-hydroxybutyric and 3-hydroxyhexanoic acids. Scanning electron microscopy and atomicforce microscopy were used to examine the microstructure of membrane surfaces, showing that membranes based on the copolymer of 3-hydroxybutyrate and 3-hydroxyhexanoate had the roughest surface, while membranes based on the copolymer of 3-hydroxybutyrate and 3-hydroxyvalerate had the smoothest surface. The contact angle for water in air was smaller and hydrophilic properties better in the copolymer membranes than in the membranes based on the high-crystallinity homopolymer of 3-hydroxybutyric acid. The culture of mouse fibroblast cell line NIH 3,3 was used to test PHAbased membranes; results of fluorescent probes of DNA DAPI and the MTT assay show that membranes based on studied PHAs are not cytotoxic on direct contact with cells and are highly biocompatible; their adhesive properties and ability to maintain fibroblast proliferation are similar to those of polystyrene and better than those of polylactic acid membranes.

Scopus
Держатели документа:
Institute of Biophisycs, SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, RAS, Moscow, Russian Federation
Massachusetts Institute of Technology, Cambridge, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Nikolaeva, E.D.; Shishatskaya, E.I.; Mochalov, K.E.; Volova, T.G.; Sinsky, A.J.

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Comparative study of PHA degradation in natural reservoirs having various types of ecosystems / O. Voinova, M. Gladyshev, T. G. Volova // Macromolecular Symposia. - 2008. - Vol. 269, Is. 1. - P34-37, DOI 10.1002/masy.200850906 . - ISSN 1022-1360
Кл.слова (ненормированные):
Biodegradable polyesters -- Ecosystem -- Natural environment -- PHA -- Water reservoir -- ABS resins -- Biochemistry -- Biodegradable polymers -- Biodegradation -- Biopolymers -- Biotechnology -- Degradation -- Ecology -- Ecosystems -- Esters -- Polymers -- Aerobic and anaerobic conditions -- Anaerobic conditions -- Biodegradable polyesters -- Comparative studies -- Ecological characteristics -- Environment temperatures -- Natural environment -- Natural environments -- PHA -- Polyhydroxyalkanoate -- Polymer degradations -- Water reservoir -- Water reservoirs -- Reservoirs (water)
Аннотация: The kinetics of polyhydroxyalkanoate (PHA) degradation in natural environment in two water reservoirs having various ecological characteristics was studied. It was shown that biodegradation of polymer essentially depends on the environment temperature and inorganic composition of water. The processes of polymer degradation under aerobic and anaerobic conditions were compared. The polymer degradation was slower under anaerobic conditions. Copyright В© 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

Scopus
Держатели документа:
Institute of Biophysics, SB, RAS, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal National University, Svohodnyi Av., Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Voinova, O.; Gladyshev, M.; Volova, T.G.

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Study of Ralstonia eutropha culture producing polyhydroxyalkanoates on products of coal processing / T. G. Volova, N. A. Voinov // Prikladnaia biokhimiia i mikrobiologiia. - 2004. - Vol. 40, Is. 3. - С. 296-300 . - ISSN 0555-1099
Кл.слова (ненормированные):
carbon monoxide -- coal -- polyester -- antibiotic resistance -- article -- culture medium -- enzyme specificity -- gas -- growth, development and aging -- metabolism -- microbiology -- Wautersia eutropha -- Carbon Monoxide -- Coal -- Culture Media -- Cupriavidus necator -- Drug Resistance, Microbial -- Gases -- Polyesters -- Substrate Specificity
Аннотация: Kinetic indices of growth, polyhydroxyalkanoate (PHA) accumulation, and gas exchange have been studied in a culture of the carbon monoxide-resistant hydrogen strain Ralstonia eutropha B-5786 grown on a gaseous substrate (GS) obtained by lignite gasification. The GS was shown to be suitable for PHA production. To increase the degree of GS consumption, various modes of gas supply to the culture were tested. Based on the results, an algorithm was developed for calculating and controlling gas-exchange parameters in the PHA-accumulating culture of Ralstonia eutropha, grown on a new GS allowing high polymer yields (up to 75%) and degrees of the substrate utilization (up to 90%).

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division of the Russian Academy of Sciences, Krasnoyarsk, 660036 Russia. : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Voinov, N.A.

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Study of a Ralstonia eutropha culture producing polyhydroxyalkanoates on products of coal processing / T. G. Volova, N. A. Voinov // Applied Biochemistry and Microbiology. - 2004. - Vol. 40, Is. 3. - P249-252, DOI 10.1023/B:ABIM.0000025946.47013.03 . - ISSN 0003-6838
Кл.слова (ненормированные):
alkanoic acid -- carbon monoxide -- coal -- hydrogen -- lignite -- algorithm -- article -- bacterial strain -- bacterium culture -- coal gasification -- controlled study -- gas -- gas exchange -- mathematical computing -- nonhuman -- Ralstonia eutropha -- Bacteria (microorganisms) -- Ralstonia -- Wautersia eutropha
Аннотация: Kinetic indices of growth, polyhydroxyalkanoate (PHA) accumulation, and gas exchange were studied in a culture of the carbon monoxide-resistant hydrogen strain Ralstonia eutropha B-5786 grown on a gaseous substrate (GS) obtained by lignite gasification. The GS was shown to be suitable for PHA production. To increase the degree of GS consumption, various modes of gas supply to the culture were tested. Based on the results, an algorithm was developed for calculating and controlling gas-exchange parameters in the PHA-accumulating culture of Ralstonia eutropha, grown on a new GS allowing high polymer yields (up to 75%) and degrees of substrate utilization (up to 90%).

Scopus
Держатели документа:
Institute of Biophysics, Siberian Div. Russ. Acad. of Sci., Krasnoyarsk, 660036, Russian Federation
Siberian State Technol. University, Min. of Educ. of the Russ. Fed., Krasnoyarsk, 660049, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Voinov, N.A.

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Dynamics of activity of the key enzymes of polyhydroxyalkanoate metabolism in Ralstonia eutropha B5786 / T. G. Volova [et al.] // Applied Biochemistry and Microbiology. - 2004. - Vol. 40, Is. 2. - P170-177, DOI 10.1023/B:ABIM.0000018921.04863.d5 . - ISSN 0003-6838
Кл.слова (ненормированные):
acetyl coenzyme A acyltransferase -- bacterial enzyme -- carbon -- carbon dioxide -- fructose -- hydrogen -- hydroxybutyrate dehydrogenase -- oxidoreductase -- poly(3 hydroxybutyric acid) -- polyhydroxyalkanoic acid -- synthetase -- article -- bacterial metabolism -- carbon source -- catalysis -- controlled study -- degradation -- depolymerization -- enzyme activity -- enzyme analysis -- molecular dynamics -- nonhuman -- protein function -- Ralstonia eutropha -- recording -- statistical significance -- synthesis -- Bacteria (microorganisms) -- Ralstonia -- Wautersia eutropha
Аннотация: The dynamics of accumulation of polyhydroxybutyrate (PHB) and the activities of key enzymes of PHB metabolism (?-ketothiolase, acetoacetyl-CoA reductase, PHB synthase, D-hydroxybutyrate dehydrogenase, and PHB depolymerase) in the hydrogen bacterium Ralstonia eutropha B5786 were studied under various conditions of carbon nutrition and substrate availability. The highest activities of ?-ketothiolase, acetoacetyl-CoA reductase, and PHB synthase were recorded during acceleration of PHB synthesis. The activities of enzymes catalyzing PHB depolymerization (PHB depolymerase and D-hydroxybutyrate dehydrogenase) were low, being expressed only upon stimulated endogenous PHB degradation. The change of carbon source (CO2 or fructose) did not affect the time course of the enzyme activity significantly.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Kalacheva, G.S.; Gorbunova, O.V.; Zhila, N.O.

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Dynamics of activity of the key enzymes of polyhydroxyalkanoate metabolism in Ralstonia eutropha / T. G. Volova [и др.] // Prikladnaia biokhimiia i mikrobiologiia. - 2004. - Vol. 40, Is. 2. - С. 201-209 . - ISSN 0555-1099
Кл.слова (ненормированные):
acetoacetyl coenzyme a reductase -- acetoacetyl-CoA reductase -- acetyl coenzyme A acyltransferase -- acyltransferase -- alcohol dehydrogenase -- carboxylesterase -- hydroxybutyrate dehydrogenase -- hydroxybutyric acid -- poly(3 hydroxyalkanoic acid) depolymerase -- poly(3-hydroxyalkanoic acid) depolymerase -- poly(3-hydroxyalkanoic acid) synthase -- polyhydroxyalkanoate synthase -- polymer -- article -- chemistry -- comparative study -- culture medium -- enzymology -- growth, development and aging -- metabolism -- Wautersia eutropha -- Acetyl-CoA C-Acyltransferase -- Acyltransferases -- Alcohol Oxidoreductases -- Carboxylic Ester Hydrolases -- Culture Media -- Cupriavidus necator -- Hydroxybutyrate Dehydrogenase -- Hydroxybutyrates -- Polymers
Аннотация: The dynamics of accumulation of polyhydroxybutyrate (PHB) and the activities of the key enzymes of PHB metabolism (beta-ketothiolase, acetoacetyl-CoA reductase, PHA synthase, D-hydroxybutyrate dehydrogenase, and PHA depolymerase) in the hydrogen bacterium Ralstonia eutropha B5786 were studied under various conditions of carbon nutrition and substrate availability. The highest activities of beta-ketothiolase, acetoacetyl-CoA reductase, and PHA synthase were recorded at the stage of acceleration of PHB synthesis. The activities of enzymes catalyzing PHB depolymerization (PHB depolymerase and D-hydroxybutyrate dehydrogenase) were low, being expressed only at stimulated endogenous PHB degradation. The change of carbon source (CO2 or fructose) did not cause any marked changes in the time course of enzyme activity.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036 Russia. : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Kalacheva, G.S.; Gorbunova, O.V.; Zhila, N.O.

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Study of molecular structure of polyhydroxybutyrate-a termoplastic anddegradable biopolymer / T. G. Volova [и др.] // Biofizika. - 2000. - Vol. 45, Is. 3. - С. 445-451 . - ISSN 0006-3029
Кл.слова (ненормированные):
carbon -- hydroxybutyric acid -- polyester -- Alcaligenes -- article -- chemistry -- crystallization -- Alcaligenes -- Carbon -- Crystallization -- Hydroxybutyrates -- Polyesters
Аннотация: The molecular structure of polyhydroxybutyrate from hydrogen-oxidizing bacteria Alcaligenes eutrophus was studied by X-ray diffraction analysis. It was shown that the degree of crystallinity of various samples depends little on the conditions of their preparation and is equal to 0.62-0.76. The molecular structure of solid samples and solution of polyhydroxybutyrate in chloroform were studied by the NMR and EPR methods. The conclusion is made that the molecular structure of polyhydroxybutyrate does not depend on the features of the strain and conditions of carbon nutrition of microorganisms producing polyhydroxybutyrate. Defects induced by gamma-radiation in polyhydroxybutyrate were studied. Free radicals were isolated, and their structure was decoded.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia. : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Vasil'ev, A.D.; Zeer, E.P.; Petrakovskaia, E.A.; Falaleev, O.V.

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10.

Radioactive contamination of aquatic organisms of the Yenisei river in the area affected by the activity of the mining-and-chemical combine / A. Ya. Bolsunovskij, A. G. Sukovatyj // Radiatsionnaya Biologiya. Radioekologiya. - 2004. - Vol. 44, Is. 3. - С. 361-366 . - ISSN 0869-8031
Кл.слова (ненормированные):
Dosimetry -- Environmental impact -- Radioactivity -- River pollution -- Water analysis -- Aquatic organisms -- Diatoms -- Exposure dose rate -- Fontinalis antipyretica -- Phylolimnogammarus viridis -- The Enisei River -- Radioisotopes -- Animalia -- Bacillariophyta -- Bryophyta -- Fontinalis -- Fontinalis antipyretica -- fresh water -- radioisotope -- animal -- article -- chemical industry -- Crustacea -- diatom -- environmental monitoring -- industrial waste -- methodology -- mining -- plant -- radiation exposure -- radiation response -- Russian Federation -- water pollutant -- water pollution -- Animals -- Chemical Industry -- Crustacea -- Diatoms -- Dose-Response Relationship, Radiation -- Environmental Monitoring -- Fresh Water -- Industrial Waste -- Mining -- Plants -- Radioisotopes -- Siberia -- Water Pollutants, Radioactive -- Water Pollution
Аннотация: The study was done to investigate the content of manmade radionuclides in aquatic organisms of the Yenisei River near the Mining-and-Chemical Combine (MCC) and to estimate the exposure dose rates to organisms from various sources. The results of the investigation and calculations suggest that the main source of radioactive contamination of aquatic organisms is the coolant of the third MCC reactor, which is still being released into the Yenisei. Gamma-spectrometric analysis revealed 23 manmade radionuclides in the biomass of aquatic plants. The aquatic animal Phylolimnogammarus viridis and diatoms also contain manmade radionuclides. Among aquatic organisms, the highest dose rate is received by aquatic plants (up to 39 ?Gy/day). For most aquatic organisms under study, the dose received from the technogenic irradiation is an order of magnitude higher than the dose received from natural irradiation. The water moss (Fontinalis antipyretica) features the highest capacity to accumulate manmade radionuclides; hence, it accumulates the largest technogenic exposure dose among the study aquatic organisms.

Scopus
Держатели документа:
Inst. of Biophysics, Sib. Div. of RAS, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovskij, A.Ya.; Sukovatyj, A.G.

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11.

Influence of anthropogenic pollution on content of essential polyunsaturated fatty acids in links of food chain of river ecosystem / M. I. Gladyshev [et al.] // Contemporary Problems of Ecology. - 2012. - Vol. 5, Is. 4. - P376-385, DOI 10.1134/S1995425512040051 . - ISSN 1995-4255
Кл.слова (ненормированные):
gammarus -- grayling -- heavy metals -- polyunsaturated fatty acids -- amphipod -- anthropogenic effect -- anthropogenic source -- fatty acid -- food chain -- heavy metal -- littoral environment -- oil pollution -- phenol -- river system -- salmonid -- sampling -- Krasnoyarsk [Russian Federation] -- Russian Federation -- Yenisei River -- Gammarus
Аннотация: In the course of monthly sampling in 2008-2010, two regions of the littoral of the Yenisei river were compared. One of these regions (conventionally pure) was situated upstream of Krasnoyarsk, while the other (conventionally polluted) was downstream of Krasnoyarsk. The concentrations of heavy metals, oil products, phenols, biogenic elements and essential polyunsaturated fatty acids (PUFAs) in various components of the river ecosystem were determined. It was discovered that the anthropogenic pollution causes a decrease in the resources of essential PUFA in the biomass of the upper links of the food chain of the river ecosystem. В© 2012 Pleiades Publishing, Ltd.

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

Доп.точки доступа:
Gladyshev, M.I.; Anishchenko, O.V.; Sushchnik, N.N.; Kalacheva, G.S.; Gribovskaya, I.V.; Ageev, A.V.

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12.

Associating particulate essential fatty acids of the ?3 family with phytoplankton species composition in a Siberian reservoir / N. N. Sushchik [et al.] // Freshwater Biology. - 2004. - Vol. 49, Is. 9. - P1206-1219, DOI 10.1111/j.1365-2427.2004.01263.x . - ISSN 0046-5070
Кл.слова (ненормированные):
Cyanobacteria -- Diatoms -- Fatty acids -- Food quality -- Species composition -- cyanobacterium -- diatom -- fatty acid -- food quality -- food web -- growing season -- phytoplankton -- reservoir -- Eurasia -- Siberia -- Anabaena -- Anabaena flos-aquae -- Aphanizomenon -- Aphanizomenon flos-aquae -- Bacillariophyta -- Cyanobacteria -- Cyclotella -- Dinophyceae -- Flos -- Microcystis -- Microcystis aeruginosa -- Planktothrix -- Planktothrix agardhii -- Stephanodiscus
Аннотация: 1. We studied variation in the composition of fatty acids in the seston of a small freshwater reservoir with changes in phytoplankton composition during four growth seasons. We focused on the dynamics of the ?3 fatty acids because of their potential importance for zooplankton nutrition. 2. Total diatoms were related to the 20:5?3 fatty acid (eicosapentaenoic, EPA) content in seston. Among two dominant diatom genera, Cyclotella was not associated with EPA content. In contrast, there was a significant correlation between Stephanodiscus and the percentage contribution and content of EPA throughout the study. Hence, freshwater diatoms can differ strongly in content of the essential EPA. 3. We considered abundant cyanobacteria as a potential source of 18:3?3 fatty acid (linolenic, ALA) to aquatic food webs. Among four dominant cyanobacteria species, two (Anabaena flos-aquae and Planktothrix agardhii) showed significant correlation with the ALA content of the seston, while the other two (Aphanizomenon flos-aquae and Microcystis aeruginosa) did not. 4. Dinophyta had a relatively high level of 22:6?3 (docosahexaenoic, DHA) for freshwater species and can be also a source of EPA to aquatic food webs. 5. Our results show that various species of diatoms as well as cyanobacteria can be of contrasting nutritional value for zooplankton because of their different content of the essential PUFAs. Diatoms, which are low in EPA, could not be considered as a valuable food, while some field populations of cyanobacteria might be valuable sources of essential ALA.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Krasnoyarsk State Agric. University, Krasnoyarsk, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

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

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13.

An in situ method for the investigation of vertical distributions of zooplankton in lakes: Test of a two-compartment enclosure / A. P. Tolomeyev, Y. S. Zadereev // Aquatic Ecology. - 2005. - Vol. 39, Is. 1-2. - P181-188, DOI 10.1007/s10452-004-5732-0 . - ISSN 1386-2588
Кл.слова (ненормированные):
Anoxic hypolimnion -- Solar radiation -- Stratified lake -- Vertical migration -- Zooplankton -- biotic factor -- enclosure experiment -- lake ecosystem -- physicochemical property -- vertical distribution -- zooplankton -- Animalia -- Arctodiaptomus salinus -- Brachionus plicatilis
Аннотация: Two-section enclosures were designed for the investigation of the effect of various physicochemical and biological factors on vertical distribution of zooplankton in situ. The framework of the enclosure was a cylindrical polyethylene column without any partitions inside, in which the isolation of animals in different sections after in situ exposure was achieved by pinching the flexible central part of the column. Enclosures were tested at the brackish stratified meromictic Lake Shira (Russia, Khakasia). The absence of fish and carnivorous zooplankton in the lake suggests that the vertical distribution of zooplankton is mainly determined by physicochemical gradients in the water column. Experiments and field observations demonstrated that all age and size groups of Arctodiaptomus salinus and Brachionus plicatilis strongly avoided surface layers during the daylight. The escape of zooplankton from the anoxic hypolimnion was less active. Statistically significant avoidance was observed only for copepodites C4-C5 and females of A. salinus. The relatively simple construction of the columns and easy handling during the experiment were the factors that favoured the use of this device to perform in situ basic tests of the effect of different factors on the vertical distribution of zooplankton. В© Springer 2005.

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

Доп.точки доступа:
Tolomeyev, A.P.; Zadereev, Y.S.

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14.

Methods of nonlinear dynamics and equilibrium structures of magnetoelastic chains / P. I. Belobrov, A. G. Tret'yakov, G. M. Zaslavsky // Journal of Statistical Physics. - 1985. - Vol. 38, Is. 1-2. - P393-404, DOI 10.1007/BF01017869 . - ISSN 0022-4715
Кл.слова (ненормированные):
chaos -- Incommensurate structure -- magnetoelastic interaction -- nonlinear resonance
Аннотация: To study equilibrium structures of magnetoelastic chains we have introduced an equivalent system and examined the whole class of its solutions. Appearance of various structures of the chain is due to the choice of an appropriate minimizing solution of the equivalent dynamic system. Commensurate and incommensurate structures, transitions from ferromagnetic to antiferromagnetic states, and transitions to the states with alternating clusters of ordered spins are obtained. Conditions for appearance of chaotic structures and amorphous magnetic states of the chain are discussed. В© 1985 Plenum Publishing Corporation.

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Держатели документа:
L. V. Kirensky Institute of Physics, USSR Academy of Sciences Siberian Branch, Krasnoyarsk, 660036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Belobrov, P.I.; Tret'yakov, A.G.; Zaslavsky, G.M.

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15.

A remote sensing technique for the assessment of stable interannual dynamical patterns of vegetation / M. Y. Chernetskiy, A. P. Shevyrnogov, N. F. Ovchinnikova // Proceedings of SPIE - The International Society for Optical Engineering. - 2011. - Vol. 8174: Remote Sensing for Agriculture, Ecosystems, and Hydrology XIII (19 September 2011 through 21 September 2011, Prague) Conference code: 87191. - Ст. 1, DOI 10.1117/12.896748
Кл.слова (ненормированные):
EVI -- Forest -- Kernel k-means -- Minimum noise fraction -- MODIS -- NDVI -- Principal component analysis -- Time series -- EVI -- Forest -- Kernel k-means -- Minimum noise fraction -- MODIS -- NDVI -- Principal Components -- Agriculture -- Ecosystems -- Hydrology -- Principal component analysis -- Remote sensing -- Satellite imagery -- Space optics -- Time series -- Vegetation
Аннотация: The time series of various parameters of satellite imagery (NDVI/EVI, temperature) during the growing season were considered in this work. This means that satellite images were considered not like a number of single scenes but like temporal sequences. Using time series enables estimating the integral phenological properties of vegetation. The basis of the developed technique is to use one of the methods of transformation of the multidimensional space in order to get the principal components. The technique is based on considering each dimension of the multidimensional space as satellite imagery for a specific date range. The technique automatically identifies spatial patterns of vegetation that are similar by phenology and growing conditions. Subsequent analysis allowed identification of the belonging of derived classes. Thus, the technique of revealing the spatial distribution of different dynamical vegetation patterns based on the phenological characteristics has been developed. The technique is based on a transformation of the multidimensional space of states of vegetation. Based on the developed technique, areas were obtained with similar interannual trends. В© 2011 SPIE.

Scopus
Держатели документа:
Institute of Biophysics of SB RAS, Krasnoyarsk 660036, Akademgorodok, Russian Federation
V.N. Sukachev Institute of Forest of SB RAS, Krasnoyarsk 660036, Akademgorodok, Russian Federation
Siberian Federal University, Kyrensky st., 26, Krasnoyarsk, 660074, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Chernetskiy, M.Y.; Shevyrnogov, A.P.; Ovchinnikova, N.F.

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16.

A study of backscattered spectra dynamics of agricultural crops during growth period on the territory of the Krasnoyarskii Krai (Russia) / I. Yu. Pugacheva, A. F. Sid'ko, A. P. Shevyrnogov // Advances in Space Research. - 2010. - Vol. 45, Is. 10. - P1224-1230, DOI 10.1016/j.asr.2009.11.020 . - ISSN 0273-1177
Кл.слова (ненормированные):
Barley -- Oats -- Spectral brightness coefficients -- Spectral reflectance -- Wheat -- Agricultural crops -- Back-scattered -- Data base -- Ecological state -- Field ground -- Growth period -- Optical thickness -- Satellite data -- Seasonal dynamics -- Space image -- Spatial distribution -- Species composition -- Spectral brightness -- Spectral curves -- Spectral differences -- Spectral reflectances -- Underlying surface -- Reflection -- Size distribution -- Crops
Аннотация: The work presents the results of the study aimed at determining the seasonal dynamics of the spectral brightness and reflectance of agricultural crops (wheat, barley and oats) in the Krasnoyarskii Krai (Russia). The analysis of spectral curves obtained through field ground measurements and from satellite data showed that fine spectral differences can be used to study the spatial distribution of various types of vegetation and their ecological state. Based on the created electronic spectral brightness data base, the possibilities are shown of using spectrophotometric information for determining morphophysiological changes occurring in the plants and their species composition. The determined contrasts can be effectively used to obtain necessary information while processing space images, which suffer from natural interferences (varying optical thickness of the atmosphere, cloudiness, alterations in the scanner's angle of view, varying solar height, and highly inhomogeneous underlying surface). В© 2010 COSPAR.

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

Доп.точки доступа:
Pugacheva, I.Yu.; Sid'ko, A.F.; Shevyrnogov, A.P.

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17.

Long-term dynamics of chlorophyll concentration in the ocean surface layer (by space data) / A. Shevyrnogov, G. Vysotskaya // Advances in Space Research. - 2007. - Vol. 39, Is. 1. - P197-202, DOI 10.1016/j.asr.2006.10.015 . - ISSN 0273-1177
Кл.слова (ненормированные):
Dynamics -- Ocean -- Phytopigment -- Climatology -- Concentration (process) -- Hydrology -- Marine biology -- Ocean currents -- Plants (botany) -- Biosphere -- Ocean -- Phytopigments -- Chlorophyll
Аннотация: To preserve the biosphere and to use it efficiently, it is necessary to gain a deep insight into the dynamics of the primary production process on our planet. Variability of chlorophyll concentration in the ocean is one of the most important components of this process. These investigations are, however, very labor-consuming, because of the difficulties related to the accessibility of the water surface and its large size. In this work long-term changes in chlorophyll concentration in the surface layer of the ocean have been analyzed on the basis of the CZCS data for 7.5 years from 1979 to 1986 and the SeaWiFS data from 1997 to 2004. It has been shown that the average chlorophyll concentration calculated in all investigated areas varies moderately. However, when analyzing spatially local trends, the areas have been detected that have significant rise and fall of chlorophyll concentrations. Some interesting features of the long-term dynamics of chlorophyll concentration have been found. The opposite directions of long-term trends (essential increase or decrease) cannot be explained only by large-scale hydrological phenomena in the ocean (currents, upwellings, etc.). The measured chlorophyll concentration results from the balance between production and destruction processes. Which process dominates is determined by various hydrophysical, hydrobiological, and climatic processes, leading to sharp rises or falls of the concentration. It is important to estimate the scale of the areas in which this or that process dominates. Therefore, the study addresses not only the dynamics of the mean value but also the dynamics of the areas in which the dominance of certain factors has led to a sharp fall or rise in chlorophyll concentration. Thus, the obtained results can be used to estimate long-term changes in the ocean biota. В© 2006 COSPAR.

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

Доп.точки доступа:
Shevyrnogov, A.; Vysotskaya, G.

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18.

Spatial and temporal anomalies of sea surface temperature in global scale (by space-based data) / A. Shevyrnogov, G. Vysotskaya, E. Shevyrnogov // Advances in Space Research. - 2004. - Vol. 33, Is. 7. - P1179-1183, DOI 10.1016/S0273-1177(03)00369-7 . - ISSN 0273-1177
Кл.слова (ненормированные):
Anomalies -- Chlorophyll -- Hydrological structure -- Space-based data -- Temperature -- Chlorophyll -- Data reduction -- Oceanography -- Satellites -- Surface properties -- Temperature measurement -- Satellite images -- Spatial distribution -- Space research -- AVHRR -- chlorophyll -- remote sensing -- satellite imagery -- sea surface temperature
Аннотация: The work presents the data on the spatial distribution of temperature anomalies in the Global Ocean, based on the long-term measurements with the AVHRR satellite equipment. It is noteworthy that such results can be only obtained by using long time series of satellite images. To obtain them by ship-borne methods is actually impossible. The proposed anomaly criterion is equal to a difference between minimum/maximum and average temperature, normed for the mean square deviation. The difference is calculated from the whole time series (with regard to a season). Based on this criterion, anomalies can be distinguished on the background of usual seasonal dynamics at various absolute values of deviations of the measured parameter. Besides, rare, single, fluctuations can be also revealed. Based on the proposed criterion, connected zones have been defined. These zones occur almost in every part of the Global Ocean. The data obtained have been analyzed in association with the CZCS (1978-1986) and SeaWiFS satellite images in order to compare them with the areas of anomalous dynamics of chlorophyll concentration and the regions quasistationary in the seasonal dynamics of chlorophyll. Anomalies in the temperature dynamics are of exceptional importance for the formation of climatic deviations; they affect the ocean-atmosphere interaction and reflect variations in the hydrological structure of the surface waters. The work presents a comparison with the dynamics of chlorophyll concentration distribution determined from the SeaWiFS data for the Atlantic Ocean. В© 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.

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

Доп.точки доступа:
Shevyrnogov, A.; Vysotskaya, G.; Shevyrnogov, E.

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19.

Trends of chlorophyll concentration in the surface layer of the Northern and Central Atlantic, a satellite data-based study / A. Shevyrnogov, G. Vysotskaya, E. Shevyrnogov // Advances in Space Research. - 2002. - Vol. 30, Is. 11. - P2535-2540, DOI 10.1016/S0273-1177(02)80332-5 . - ISSN 0273-1177
Кл.слова (ненормированные):
Chlorophyll -- Climatology -- Data reduction -- Ocean engineering -- Satellites -- Surface properties -- Chlorophyll concentration -- Space research -- chlorophyll -- pigment -- remote sensing -- seasonality -- surface water -- Atlantic Ocean
Аннотация: The new data on anomalies in seasonal dynamics of chlorophyll concentration in the ocean have altered the approach to the analysis of long-term trends of phytopigments in the surface layer of the ocean. Zones have been found in which at various times there was a many-fold increase in chlorophyll concentration versus its usual level. These changes are local in time and space. If anomalies in the long-term tendencies in the change of phytopigment surface distribution in the ocean are ignored in the analysis, the resulting picture will inadequately reflect the real processes. The work presents the results of the analysis of long-term trends of chlorophyll concentration on the basis of the CZCS satellite data in the Atlantic Ocean. The results are given as maps representing different variants of trends. The data obtained can be used to analyze the consequences of long-term changes of climate and changes in the interaction between the atmosphere and the ocean. В©2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.

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

Доп.точки доступа:
Shevyrnogov, A.; Vysotskaya, G.; Shevyrnogov, E.

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20.

Use of halophytic plants for recycling NaCl in human liquid waste in a bioregenerative life support system / Y. Balnokin [et al.] // Advances in Space Research. - 2010. - Vol. 46, Is. 6. - P768-774, DOI 10.1016/j.asr.2010.03.020 . - ISSN 0273-1177
Кл.слова (ненормированные):
Biological life support system -- Halophytes -- Human waste recycling -- NaCl recycling -- A plants -- Biological life support systems -- Biomass productions -- Bioregenerative life support systems -- Daily ration -- Europaea -- Growth conditions -- Halophytes -- Halophytic plants -- Human waste -- Liquid wastes -- Nutrient solution -- Optimal conditions -- Salicornia europaea -- Body fluids -- Liquids -- Nutrients -- Plant shutdowns -- Plants (botany) -- Recycling -- Sodium alloys -- Sodium chloride
Аннотация: The purpose of this work was to develop technology for recycling NaCl containing in human liquid waste as intrasystem matter in a bioregenerative life support system (BLSS). The circulation of Na+ and Cl- excreted in urine is achieved by inclusion of halophytes, i.e. plants that naturally inhabit salt-rich soils and accumulate NaCl in their organs. A model of Na+ and Cl- recycling in a BLSS was designed, based on the NaCl turnover in the human-urine-nutrient solution-halophytic plant-human cycle. The study consisted of (i) selecting a halophyte suitable for inclusion in a BLSS, and (ii) determining growth conditions supporting maximal Na + and Cl- accumulation in the shoots of the halophyte growing in a nutrient solution simulating mineralized urine. For the selected halophytic plant, Salicornia europaea, growth rate under optimal conditions, biomass production and quantities of Na+ and Cl- absorbed were determined. Characteristics of a plant production conveyor consisting of S. europaea at various ages, and allowing continuity of Na+ and Cl - turnover, were estimated. It was shown that closure of the NaCl cycle in a BLSS can be attained if the daily ration of fresh Salicornia biomass for a BLSS inhabitant is approximately 360 g. В© 2010 COSPAR. Published by Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
K.A. Timiryazev Plant Physiology Institute, Russian Academy of Sciences, 127276 Moscow, Russian Federation
Institute of Biophysics, Siberian Branch of Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
TEC-MCT, ESA/Estec, 1 Keplerlaan, 2201 AG Noordwijk, Netherlands
Universite Blaise Pascal, LGCB, Polytech'Clermont-Ferrand, BP206, 63174 Aubire cedex, France : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Balnokin, Y.; Nikolai, M.; Popova, L.; Tikhomirov, A.; Ushakova, S.; Lasseur, C.; Gros, J.-B.

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