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A circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula [Текст] / V. I. Kolmakov [и др.] // Biofizika. - 2002. - Vol. 47, Is. 4. - P. 673-676. - Cited References: 12 . - ISSN 0006-3029

РУБ Biophysics
Рубрики:
CLOSED CULTIVATORS
FLUORESCENCE
ZOOPLANKTON
Кл.слова (ненормированные):
daily rhythm of grazing -- fluorescence -- microalgae -- flowing-through cultivator -- photoperiod -- statistical spectral analysis
Аннотация: The circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula under continuous illumination was studied by continuous registration of chlorophyll fluorescence at the outlet of a flow-through cultivator. A culture of green alga Chlorella vulgaris was used as a feed. The data obtained were treated by the statistical spectral analysis. It was found that animals preliminarily grown under a 12 h light : 12 h dark regime and transferred to constant light showed two maxima in the circadian rhythm of grazing with periods of 0.7 and 1.1 h. Animals preliminarily grown under constant light showed no circadian rhythm of grazing. It was concluded that the circadian rhythm of grazing of C quadrangula has endogenous nature and can change according to light conditions.

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

Доп.точки доступа:
Kolmakov, V.I.; Levin, L.A.; Dubovskaya, O.P.; Gladyshev, M.I.

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A circadian rhythm of grazing of microalgae by a laboratory cultureof Ceriodaphnia quadrangula / V. I. Kolmakov [et al.] // Biofizika. - 2002. - Vol. 47, Is. 4. - P676 . - ISSN 0006-3029
Кл.слова (ненормированные):
Daily rhythm of grazing -- Flowing-through cultivator -- Fluorescence -- Microalgae -- Photoperiod -- Statistical spectral analysis -- algae -- Animalia -- Ceriodaphnia quadrangula -- Chlorella vulgaris -- Chlorophyta
Аннотация: The circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula under continuous illumination was studied by continuous registration of chlorophyll fluorescence at the outlet of a flow-through cultivator. A culture of green alga Chlorella vulgaris was used as a feed. The data obtained were treated by the statistical spectral analysis. It was found that animals preliminarily grown under a 12 h light : 12 h dark regime and transferred to constant light showed two maxima in the circadian rhythm of grazing with periods of 0.7 and 1.1 h. Animals preliminarily grown under constant light showed no circadian rhythm of grazing. It was concluded that the circadian rhythm of grazing of C. quadrangula has endogenous nature and can change according to light conditions.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk Slate University, pr. Svobodnyi 79, Krasnoyarsk, 660042, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kolmakov, V.I.; Levin, L.A.; Dubovskaya, O.P.; Gladyshev, M.I.

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A mathematical model of the interactions in the mixed culture of invertebrates and algae in the "producer-consumer" aquatic biotic cycle [Text] / T. I. Pisman, O. N. Bogdanova // Aquat. Ecol. - 2004. - Vol. 38, Is. 3. - P. 415-423. - Cited References: 19 . - ISSN 1386-2588

РУБ Ecology + Limnology + Marine & Freshwater Biology
Рубрики:
RESOURCE COMPETITION
Кл.слова (ненормированные):
competition -- metabolite interaction -- principle of competitive exclusion
Аннотация: This paper presents a mathematical model of interactions between two herbivorous invertebrates (ciliate Paramecium caudatum and rotifer Brachionus plicatilis) and two planktonic algae (Chlorella vulgaris and Scenedesmus quadricauda) spatially segregated in two compartments of a chemostat - type experimental microcosm system. The model mimics a "producer-consumer" aquatic biotic cycle, describing the dynamics of the mixed culture of ciliates and rotifers, as "consumer" compartment, feeding on the mixed algal culture, as "producer" compartment, under N-limiting conditions. We experimentally found that metabolites of the alga Scenedesmus produce an adverse effect on the reproduction of ciliate Paramecium. Taking this effect into account improved the behavior of the model, the results of which came into qualitative agreement with the experimental results. Both our experimental and modeling approaches demonstrated that, even in conditions of a spatially - segregated "producer-consumer" biotic cycle, species coexistence is impossible either in the mixed algal culture or in the mixed invertebrate culture. Scenedesmus excluded Chlorella, whereas Brachionus excluded Paramecium.

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

Доп.точки доступа:
Pisman, T.I.; Bogdanova, O.N.

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A temperature dependence of the intra- and extracellular fatty-acid composition of green algae and cyanobacterium [Text] / N. N. Sushchik [et al.] // Russ. J. Plant Physiol. - 2003. - Vol. 50, Is. 3. - P. 374-380, DOI 10.1023/A:1023830405898. - Cited References: 31 . - ISSN 1021-4437

РУБ Plant Sciences
Рубрики:
SURFACE-FILM
   LIPIDS
   WATER
   BLOOM
   SEA
   BAY
Кл.слова (ненормированные):
green algae -- cyanobacterium -- lipids -- fatty acids -- secretion
Аннотация: The effect of ambient temperature on the composition of intracellular fatty acids and the release of free fatty acids (FFA) into a medium by cyanobacterium Spirulina platensis and eukaryotic microalgae, Chlorella vulgaris and Botryococcus braunii, was studied using their batch cultures. It was found that all the species studied, regardless of their taxonomic status, responded to the temperature regime by similar changes in their intracellular fatty acid composition: the relative content of more unsaturated fatty acids decreased with the elevation of temperature. At the same time, in the prokaryote, this temperature shift blocked, first of all, the elongation of 16:0 to 18:0 and then their further desaturation. In eukaryotes, the change in the desaturation of dienoic to trienoic fatty acids was the most pronounced process. The ratio of dienoic to trienoic fatty acids remained almost unchanged in S. platensis. The relative content of extracellular unsaturated FFA increased in the prokaryotic organism S. platensis at a higher temperature. But no significant changes in the composition of extracellular unsaturated FFA were detected in eukaryotic algae upon temperature elevation.

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

Доп.точки доступа:
Sushchik, N.N.; Kalacheva, G.S.; Zhila, N.O.; Gladyshev, M.I.; Volova, T.G.

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A Temperature Dependence of the Intra- and Extracellular Fatty-Acid Composition of Green Algae and Cyanobacterium / N. N. Sushchik [et al.] // Russian Journal of Plant Physiology. - 2003. - Vol. 50, Is. 3. - P374-380, DOI 10.1023/A:1023830405898 . - ISSN 1021-4437
Кл.слова (ненормированные):
Cyanobacterium -- Fatty acids -- Green algae -- Lipids -- Secretion -- algae -- Bacteria (microorganisms) -- Botryococcus braunii -- Chlorella vulgaris -- Chlorophyta -- Eukaryota -- Prokaryota -- Spirulina -- Spirulina platensis
Аннотация: The effect of ambient temperature on the composition of intracellular fatty acids and the release of free fatty acids (FFA) into a medium by cyanobacterium Spirulina platensis and eukaryotic microalgae, Chlorella vulgaris and Botryococcus braunii, was studied using their batch cultures. It was found that all the species studied, regardless of their taxonomic status, responded to the temperature regime by similar changes in their intracellular fatty acid composition: the relative content of more unsaturated fatty acids decreased with the elevation of temperature. At the same time, in the prokaryote, this temperature shift blocked, first of all, the elongation of 16: 0 to 18:0 and then their further desaturation. In eukaryotes, the change in the desaturation of dienoic to trienoic fatty acids was the most pronounced process. The ratio of dienoic to trienoic fatty acids remained almost unchanged in S. platensis. The relative content of extracellular unsaturated FFA increased in the prokaryotic organism S. platensis at a higher temperature. But no significant changes in the composition of extracellular unsaturated FFA were detected in eukaryotic algae upon temperature elevation.

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:
Sushchik, N.N.; Kalacheva, G.S.; Zhila, N.O.; Gladyshev, M.I.; Volova, T.G.

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An experimental study and a mathematical model of interactions in a mixed culture of invertebrates and algae in the Producer-Consumer aquatic biotic cycle [Текст] / T. I. Pisman, O. N. Bogdanova // Biofizika. - 2004. - Vol. 49, Is. 6. - С. 1112-1117. - Cited References: 22 . - ISSN 0006-3029

РУБ Biophysics
Рубрики:
PREY
Кл.слова (ненормированные):
mixed culture -- invertebrates -- algae -- metabolic products
Аннотация: An experimental investigation was carried out, and a mathematical model of interaction between invertebrates (infusoria Paramecium caudatum and rotifera Brachionus plicatilis) and algae (Chlorella vulgaris and S enedesmus quadricauda) in the <> aquatic biotic cycle with spatially divided links was constructed. The model describes the dynamics of a mixed culture of infusoria and rotifera in the <> link, when they consume a mixed culture of algae coming from the <> link. A negative influence of products of algae Scenedesmus metabolism upon the reproduction of infusoria P. caudatum was revealed. Taking this into account, a qualitative coincidence of the results of mathematical modeling with experimental data was obtained. It was shown that the co-existence of mixed algae culture in the <> link with invertebrates in the <> link in the <> aquatic biotic cycle is impossible because of the displacement of infusoria P. caudatum by rotifera Brachionus plicatilis.

Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Pisman, T.I.; Bogdanova, O.N.

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Assessing the reliability of quantitative fatty acid signature analysis and compound-specific isotope analysis-based mixing models for trophic studies / I. Prokopkin, O. Makhutova, E. Kravchuk [et al.] // Biomolecules. - 2021. - Vol. 11, Is. 11. - Ст. 1590, DOI 10.3390/biom11111590 . - ISSN 2218-273X
Кл.слова (ненормированные):
CSIA?based mixing model -- Daphnia -- Fatty acids -- Food -- IsoError -- QFASA -- fatty acid -- algal cell culture -- animal experiment -- Article -- Chlorella -- compound specific isotope analysis -- controlled study -- Cryptomonas -- Daphnia -- fatty acid analysis -- gas chromatography -- isotope analysis -- lipid composition -- mathematical model -- nonhuman -- quantitative fatty acid signature analysis -- reliability -- zooplankton
Аннотация: The study of the trophic relationships of aquatic animals requires correct estimates of their diets. We compared the quantitative fatty acid signature analysis (QFASA) and the isotope?mixing model IsoError, based on the compound?specific isotope analysis of fatty acids (CSIA?FA), which are potentially effective models for quantitative diet estimations. In a 21?day experiment, Daphnia was fed a mixture of two food items, Chlorella and Cryptomonas, which were supplied in nearly equal proportions. The percentages and isotope values of the FAs of the algal species and Daphnia were measured. The IsoError based on CSIA?FA gave an estimation of algae consumption using only one FA, 18:3n?3. According to this model, the proportion of consumption of Chlorella decreased while the proportion of consumption of Cryptomonas increased during the experiment. The QFASA model was used for two FA subsets—the extended?dietary subset, which included sixteen FAs, and the dietary one, which included nine FAs. According to both subsets, the portion of consumed Chlorella decreased from Day 5 to 10 and then increased at Day 21. The comparison of the two model approaches showed that the QFASA model is a more reliable method to determine the contribution of different food sources to the diet of zooplankton than the CSIA?based mixing model. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Scopus
Держатели документа:
Institute of Biophysics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Prokopkin, I.; Makhutova, O.; Kravchuk, E.; Sushchik, N.; Anishchenko, O.; Gladyshev, M.

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Biochemical composition of several blue green algae and Chlorella / N. I. Trubachev, I. I. Gitel'zon, G. S. Kalacheva // Applied Biochemistry and Microbiology. - 1977. - Vol. 12, Is. 2. - P155-161 . - ISSN 0003-6838
Кл.слова (ненормированные):
fatty acid -- lipid -- protein -- vitamin -- alga -- blue green alga -- chlorella -- in vitro study -- microorganism -- plant -- theoretical study

Scopus
Держатели документа:
Inst. Phys., Siberian Branch, Acad. Scis USSR, Krasnoyarsk, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Trubachev, N.I.; Gitel'zon, I.I.; Kalacheva, G.S.

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Biological life support systems for a Mars mission planetary base: Problems and prospects / A. A. Tikhomirov [et al.] // Advances in Space Research. - 2007. - Vol. 40, Is. 11. - P1741-1745, DOI 10.1016/j.asr.2006.11.009 . - ISSN 0273-1177
Кл.слова (ненормированные):
BLSS -- Matter turnover -- Wastes utilization -- Biological systems -- Biophysics -- Martian surface analysis -- Physical chemistry -- Problem solving -- Biological life support systems -- Mars mission planetary base -- Matter turnover -- Wastes utilization -- Life support systems (spacecraft)
Аннотация: The study develops approaches to designing biological life support systems for the Mars mission - for the flight conditions and for a planetary base - using experience of the Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences (IBP SB RAS) with the Bios-3 system and ESA's experience with the MELISSA program. Variants of a BLSS based on using Chlorella and/or Spirulina and higher plants for the flight period of the Mars mission are analyzed. It is proposed constructing a BLSS with a closed-loop material cycle for gas and water and for part of human waste. A higher-plant-based BLSS with the mass exchange loop closed to various degrees is proposed for a Mars planetary base. Various versions of BLSS configuration and degree of closure of mass exchange are considered, depending on the duration of the Mars mission, the diet of the crew, and some other conditions. Special consideration is given to problems of reliability and sustainability of material cycling in BLSS, which are related to production of additional oxygen inside the system. Technologies of constructing BLSS of various configurations are proposed and substantiated. Reasons are given for using physicochemical methods in BLSS as secondary tools both during the flight and the stay on Mars. В© 2007.

Scopus
Держатели документа:
Institute of Biophysics (Siberian Branch of Russian Academy of Science) Akademgorodok, Krasnoyarsk, 660036, Russian Federation
ESA/ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tikhomirov, A.A.; Ushakova, S.A.; Kovaleva, N.P.; Lamaze, B.; Lobo, M.; Lasseur, Ch.

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10.

Biological life-support systems for Mars mission / J. I. Gitelson // Advances in Space Research. - 1992. - Vol. 12, Is. 5. - P167-192 . - ISSN 0273-1177
Кл.слова (ненормированные):
air conditioning -- Alcaligenes -- article -- astronomy -- biomass -- Chlorella -- classification -- comparative study -- equipment design -- human -- instrumentation -- microclimate -- plant -- solar energy -- space flight -- waste management -- water management -- Air Conditioning -- Alcaligenes -- Biomass -- Chlorella -- Ecological Systems, Closed -- Equipment Design -- Humans -- Life Support Systems -- Mars -- Plants -- Solar Energy -- Space Flight -- Spacecraft -- Waste Management -- Water Purification
Аннотация: Mars mission like the Lunar base is the first venture to maintain human life beyond earth biosphere. So far, all manned space missions including the longest ones used stocked reserves and can not be considered egress from biosphere. В© 1991.

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

Доп.точки доступа:
Gitelson, J.I.

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11.

Bios-3: Siberian experiments in bioregenerative life support / F. B. Salisbury, J. I. Gitelson, G. M. Lisovsky // BioScience. - 1997. - Vol. 47, Is. 9. - P575-585 . - ISSN 0006-3568
Кл.слова (ненормированные):
agriculture -- Chlorella -- construction work and architectural phenomena -- crop -- energy metabolism -- evaluation -- growth, development and aging -- human -- metabolism -- methodology -- microbiology -- microclimate -- NASA Discipline Life Support Systems -- Non-NASA Center -- photon -- review -- Russian Federation -- space flight -- NASA Discipline Life Support Systems -- Non-NASA Center -- Agriculture -- Chlorella -- Crops, Agricultural -- Ecological Systems, Closed -- Energy Metabolism -- Environment, Controlled -- Environmental Microbiology -- Evaluation Studies -- Facility Design and Construction -- Humans -- Life Support Systems -- Photons -- Siberia -- Space Flight -- Space Simulation

Scopus
Держатели документа:
Dept. Plants, Soils, Biometeorology, College of Agriculture, Utah State University, Logan, UT 84322-4820, United States
Institute of Biophysics, Academy of Sciences of Russia, Siberian Branch, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Salisbury, F.B.; Gitelson, J.I.; Lisovsky, G.M.

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12.

Catalase activity as a potential indicator of the reducer component of small closed ecosystems [Text] / A. B. Sarangova, L. A. Somova, T. I. Pisman ; ed. RM Wheeler [et al.] // LIFE SCIENCES: LIFE SUPPORT SYSTEMS STUDIES-I. Ser. ADVANCES IN SPACE RESEARCH : PERGAMON PRESS LTD, 1997. - Vol. 20: F4.6, F4.8, F4.2 and F4.9 Symposia of COSPAR Scientific Commission F on Life Sciences - Life Support System Studies-I, at the 31st COSPAR Scientific Assembly (JUL 14-SEP 21, 1996, BIRMINGHAM, ENGLAND), Is. 10. - P. 1945-1948, DOI 10.1016/S0273-1177(97)00630-3. - Cited References: 8 . - ISBN 0273-1177. - ISBN 0-08-043307-3

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

Аннотация: Dynamics of catalase activity has been shown to reflect the growth curve of microorganisms in batch cultivation (celluloselythic bacteria Bacillus acidocaldarius and bacteria of the associated microflora Chlorella vulgaris). Gas and substrate closure of the three component ecosystems with spatially separated components "producer-consumer-reducer" (Chl, vulgaris-Paramecium caudatum-B. acidocaldarius, two bacterial strains isolated from the associated microflora Chl. vulgaris) demonstrated that the functioning of the reducer component can be estimated by the catalase activity of microorganisms of this component. (C) 1997 COSPAR. Published by Elsevier Science Ltd.

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

Доп.точки доступа:
Sarangova, A.B.; Somova, L.A.; Pisman, T.I.; Wheeler, RM \ed.\; Garland, JL \ed.\; Tibbitts, TW \ed.\; Nielsen, SS \ed.\

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13.

Catalase activity as a potential indicator of the reducer component of small closed ecosystems / A. B. Sarangova, L. A. Somova, T. I. Pisman // Advances in Space Research. - 1997. - Vol. 20, Is. 10. - P1945-1948 . - ISSN 0273-1177
Кл.слова (ненормированные):
carboxymethylcellulose -- catalase -- animal -- article -- Bacillus -- bacterial count -- Chlorella -- culture medium -- enzymology -- growth, development and aging -- metabolism -- microclimate -- Paramecium -- Animals -- Bacillus -- Carboxymethylcellulose -- Catalase -- Chlorella -- Colony Count, Microbial -- Culture Media -- Ecological Systems, Closed -- Paramecium
Аннотация: Dynamics of catalase activity has been shown to reflect the growth curve of microorganisms in batch cultivation (celluloselythic bacteria Bacillus acidocaldarius and bacteria of the associated microflora Chlorella vulgaris). Gas and substrate closure of the three component ecosystems with spatially separated components "producer-consumer-reducer" (Chl. vulgaris-Paramecium caudatum-B. acidocaldarius, two bacterial strains isolated from the associated microflora Chl. vulgaris) demonstrated that the functioning of the reducer component can be estimated by the catalase activity of microorganisms of this component. В© 1997 COSPAR. Published by Elsevier Science Ltd.

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

Доп.точки доступа:
Sarangova, A.B.; Somova, L.A.; Pisman, T.I.

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14.

CHANGES IN OPTICAL CHARACTERISTICS OF SOLITARY CHLORELLA CELLS DURING THE DEVELOPMENT CYCLE [Text] / E. A. FURYAEV, V. N. BELYANIN, I. A. TERSKOV // SOVIET PLANT PHYSIOLOGY. - 1982. - Vol. 29, Is. 4. - P559-566. - Cited References: 19 . - 8. - ISSN 0038-5719

РУБ Plant Sciences

: 660036, Красноярск, Академгородок, д. 50, стр. 50
Доп.точки доступа:
FURYAEV, E.A.; BELYANIN, V.N.; TERSKOV, I.A.

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15.

CHANGES IN OPTICAL CHARACTERISTICS OF SOLITARY CHLORELLA CELLS DURING THE DEVELOPMENT CYCLE [Text] / E. A. FURYAEV, V. N. BELYANIN, I. A. TERSKOV // SOVIET PLANT PHYSIOLOGY. - 1982. - Vol. 29, Is. 4. - P. 559-566. - Cited References: 19 . - ISSN 0038-5719

РУБ Plant Sciences

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50
Доп.точки доступа:
FURYAEV, E.A.; BELYANIN, V.N.; TERSKOV, I.A.

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16.

Circadian rhythms of feeding with microalgae of Ceriodaphnia quadrangula in laboratory culture / V. I. Kolmakov [и др.] // Biofizika. - 2002. - Vol. 47, Is. 4. - С. 673-676 . - ISSN 0006-3029
Кл.слова (ненормированные):
chlorophyll -- alga -- animal -- article -- chemistry -- circadian rhythm -- Crustacea -- fluorometry -- growth, development and aging -- photoperiodicity -- physiology -- Algae -- Animals -- Chlorophyll -- Circadian Rhythm -- Crustacea -- Fluorometry -- Photoperiod
Аннотация: The circadian rhythm of grazing of microalgae by a laboratory culture of Ceriodaphnia quadrangula under continuous illumination was studied by continuous registration of chlorophyll fluorescence at the outlet of a flow-through cultivator. A culture of green alga Chlorella vulgaris was used as a feed. The data obtained were treated by the statistical spectral analysis. It was found that animals preliminarily grown under a 12 h light: 12 h dark regime and transferred to constant light showed two maxima in the circadian rhythm of grazing with periods of 0.7 and 1.1 h. Animals preliminarily grown under constant light showed no circadian rhythm of grazing. It was concluded that the circadian rhythm of grazing of C. quadrangula has endogenous nature and can change according to light conditions.

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

Доп.точки доступа:
Kolmakov, V.I.; Levin, L.A.; Dubovskaia, O.P.; Gladyshev, M.I.

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17.

Comparison of rapid methods used to determine the concentration, size structure and species composition of algae / E. S. Zadereev, A. V. Drobotov, T. S. Lopatina [и др.] // J. Sib. Fed. Univ. - Biol. - 2021. - Vol. 14, Is. 1. - С. 5-27, DOI 10.17516/1997-1389-0338 . - ISSN 1997-1389
Кл.слова (ненормированные):
Flow cytometry -- Fluorescence -- Microscopy -- Particle counter -- Phytoplankton -- Size distribution
Аннотация: Traditionally, the abundance, cell size distribution and species identification of algae are determined by microscopic counts. In recent years, various rapid methods have been developed for routine algal studies. However, each of these methods has its drawbacks. It is important for aquatic ecologists to understand the advantages, disadvantages, and limitations of these methods. We compared the sensitivity of three rapid methods (multichannel fluorimeter FluoroProbe, imaging flow cytometer FlowCam, and CASY particle counter) to changes in cell abundance of three algae species (Chlorella vulgaris Beyerinck, Arthrospira platensis Gomont, and Nostoc sp.). We also assessed the ability of rapid methods to estimate the cell abundance of different species in the mixed samples. All instruments showed high sensitivity to changes in the cell abundance of different algae species and a mixture of these species. Any one of these methods, once calibrated, can be reliably used to estimate the abundance of a single-species/laboratory culture of microalgae. At the same time, FlowCam, without preliminary calibration, recorded the cell abundance closest to microscopic counts. When analysing a mixture of three microalgae differing in their cell sizes and spectral characteristics, FluoroProbe showed the highest accuracy in assessing the proportions of species in the mixture and FlowCam - in assessing their abundance. To study mixtures of algae and/or natural phytoplankton communities, it is advisable to use jointly a flow cytometer and a multichannel fluorimeter. The images of algae saved by the flow cytometer, if necessary, can be used to identify them, with a certain accuracy, to the species. Information on cells size and spectral characteristics obtained by two methods will be detailed enough to perform such common tasks as studying trophic interactions between phyto- and zooplankton or creating warning systems to inform of unwanted blooms of phytoplankton and their individual groups (for example, cyanobacteria). © Siberian Federal University. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zadereev, E. S.; Drobotov, A. V.; Lopatina, T. S.; Ovchinnikov, S. D.; Tolomeev, A. P.

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18.

Competition between links in "producer-consumer" trophic chains in an aquatic closed system with spatially separated components [Text] / T. I. Pisman, N. S. Pechurkin, L. A. Somova ; ed. n, NS Pechur // 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. - P. 1599-1603, DOI 10.1016/S0273-1177(01)00255-1. - Cited References: 13 . - ISBN 0273-1177

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

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.

WOS
Держатели документа:
Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Pisman, T.I.; Pechurkin, N.S.; Somova, L.A.; Pechur, n, NS \ed.\

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19.

Competition between links in "producers-consumer" trophic chains in an aquatic closed system with spatially separated components / T. I. Pisman, N. S. Pechurkin, L. A. Somova // Advances in Space Research. - 2001. - Vol. 27, Is. 9. - P1599-1603, DOI 10.1016/S0273-1177(01)00255-1 . - ISSN 0273-1177
Кл.слова (ненормированные):
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.

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

Доп.точки доступа:
Pisman, T.I.; Pechurkin, N.S.; Somova, L.A.

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20.

Competition between populations in the consumer-producer trophic chain in a closed aquatic system [Text] / T. I. Pisman // Russ. J. Ecol. - 2003. - Vol. 34, Is. 4. - P. 267-270, DOI 10.1023/A:1024549916165. - Cited References: 17 . - ISSN 1067-4136

РУБ Ecology

Кл.слова (ненормированные):
producer -- consumer -- competition -- ecosystem
Аннотация: The functioning of a closed aquatic consumer-producer system with spatially separated links, with each link consisting of two species, is considered. Competition between the consumers (infusorians Paratnechan caudatum and rotifers Brachionus sp.) feeding on a mixed algal culture (Chlorella vulgaris and Scenedesmus sp.) and competition between these algae under conditions of limited nitrogen supply are analyzed. It is shown that Scenedesmus algae have an advantage over C. vulgaris in terms of competitiveness, and their metabolic products have an adverse effect on reproduction in infusorians.

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

Доп.точки доступа:
Pisman, T.I.

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