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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Somova L.A.
Заглавие : Competition between links in "producers-consumer" trophic chains in an aquatic closed system with spatially separated components
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1599-1603. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00255-1
Ключевые слова (''Своб.индексиров.''): algae--aquifers--biodiversity--metabolism--nitrogen--protozoa--aquatic closed systems--spatially separated components--space research--aquatic ecosystem--competition--grazing--primary production--fresh water--nitrogen--animal--article--chlorella--food chain--green alga--metabolism--microclimate--paramecium--rotifera--algae, green--animals--chlorella--ecological systems, closed--food chain--fresh water--nitrogen--paramecium--rotifera
Аннотация: The work analyzes functioning of a "producer-consumer" closed aquatic system with spatially separated links, where each component consisted of two species. Producers in the system were the microalgae of Chlorella vulgaris and Scenedesmus sp., consumers - Paramecium caudatum infusoria and Brachionus sp. rotifers. In the experiment the competing predators were consuming on a mixed culture of algae, and the competition of algae was studied under nitrogen limitation. Under these conditions competitiveness of Scenedemus was higher than that of Chlorella vulgaris. Metabolism products of Scenedesmus algae have been found to have negative effect on reproduction of Paramecium caudatum protozoa. Predator population dynamics in the "consumer" link demonstrated that the rotifers that consume two algal species are more competitive compared to protozoa feeding on chlorella only. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Babkin A.V., Somova L.A., Sarangova A.B.
Заглавие : Experimental and mathematical models for small aqueous closed ecosystems with spatially separated components
Место публикации : Advances in Space Research. - 1999. - Vol. 24, Is. 3. - С. 361-366. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(99)00486-X
Ключевые слова (''Своб.индексиров.''): carbon dioxide--nitrogen--oxygen--quaternary ammonium derivative--aquatic environment--artificial ecosystem--ecological modeling--trophic interaction--animal--article--biological model--candida--chlorella--fermentation--mathematics--metabolism--microclimate--paramecium--photosynthesis--animals--candida--carbon dioxide--chlorella--ecological systems, closed--fermentation--mathematics--models, biological--nitrogen--oxygen--paramecium--photosynthesis--quaternary ammonium compounds
Аннотация: Experimental and theoretical models of closed 'autotroph-heteretroph' (chlorella-yeast, chlorella- protozoa) ecosystems with spatially separated components have been created and studied. The chart of flows and interaction of components of gas-closed 'chlorella-yeast' system have formed the basis describe mathematically the functioning of the given system, experimental results have been found to agree with computer solution of the problem in terms of quality. Investigation of the experimental model of the 'producer-consumer' trophic chain demonstrated the role of protozoa in nitrogen turnover. 'Production-decomposition' and 'production-grazing-decomposition' cycle models has been theoretically analyzed and compared. The predator has been shown to be a more intensive mineralizer than the reducer component.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pis'man T.I., Pechurkin N.S., Sarangova A.B., Somova L.A.
Заглавие : Experimental models of small closed systems with spatially separated unicellular organism-based components.
Место публикации : Life support & biosphere science : international journal of earth space. - 1999. - Vol. 6, Is. 2. - С. 133-139. - ISSN 10699422 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon dioxide--nitrogen--animal--article--biomass--candida--chlorella--ecosystem--growth, development and aging--metabolism--microclimate--paramecium--photosynthesis--physiology--animals--biomass--candida--carbon dioxide--chlorella--ecological systems, closed--ecosystem--nitrogen--paramecium--photosynthesis
Аннотация: Experimental models of small biotic cycles of different degree of closure and complexity with spatially separated components based on unicellular organisms have been studied. Gas closure of components looped into "autotroph-heterotroph" (chlorella-yeast) system doubled the lifetime of the system (as opposed to individually cultivated components). Higher complexity of the heterotroph component consisting of two yeast species also increased the lifetime of the system through more complete utilization of the substrate by competing yeast species. The lifetime of gas and substrate closed "producer-consumer" trophic chain (chlorella-paramecia) increased to 7 months. In 60 days the components' numbers reached their steady state followed by more than 40 cycles of the medium. The role of a predator organism (protozoan) in nitrogen cycling was demonstrated; reproduction of protozoa correlated directly with their emission of nitrogen in the ammonia form that is most optimum for growth of chlorella.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Somova L.A.
Заглавие : Competition of the natural and manmade biotic cycles in the closed aquatic system
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1757-1761. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00117-0
Ключевые слова (''Своб.индексиров.''): carbon dioxide--glucose--nitrogen compounds--oxygen--biotic cycle--space research--carbon dioxide--nitrogen--aquatic ecosystem--biosphere--competition (ecology)--endosymbiont--animal--article--bacterium--chlorella--comparative study--culture medium--food chain--growth, development and aging--metabolism--microbiology--microclimate--paramecium--photosynthesis--physiology--symbiosis--time--animals--bacteria--carbon dioxide--chlorella--culture media--ecological systems, closed--food chain--nitrogen--paramecium--photosynthesis--symbiosis--time factors--water microbiology
Аннотация: This study addresses competition between the Paramecium bursaria and zoochlorella - endosymbiosis and the infusoria Paramecium caudatum in a closed aquatic system. The system is a natural model of a simple biotic cycle. P. bursaria consumes glucose and oxygen released by its zoochlorella and releases nitrogenous compounds and carbon dioxide necessary for algal photosynthesis. P. caudatum was fed on bacteria. It was shown that the infusoria P. bursaria united in one cycle with Chlorella had a higher competitive ability than P. caudatum. With any initial percentage of the infusoria in the mixed culture, the end portion of P. bursaria reached 90 - 99%, which was significantly higher than the end portion of the P. caudatum population. It is assumed that the sustenance expenditures of P. caudatum were greater than those of the endosymbiotic paramecium, i.e. the closing of the components into a biotic cycle leads to a decrease in sustenance expenditures. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sarangova A.B., Somova L.A., Pisman T.I.
Заглавие : Catalase activity as a potential indicator of the reducer component of small closed ecosystems
Место публикации : Advances in Space Research. - 1997. - Vol. 20, Is. 10. - С. 1945-1948. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): 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.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Письман Т.И., Сомова Л.А., Сарангова А.Б., Печуркин Н.С., Мельников Е.С., Мисникова Е.А.
Заглавие : Роль звеньев биотического цикла "продуцент - консумент" (Chlorella vulgaris - Paramecium caudatum) с пространственно разделенными звеньями в круговороте азота : научное издание
Место публикации : Биотехнология. - 1995. - N 5-6. - С. 21-24. - ISSN 0234-2758
ГРНТИ : 34.29.15
Предметные рубрики: АЗОТ
КРУГОВОРОТ
ЭКОСИСТЕМЫ
ЗАМКНУТАЯ СИСТЕМА
"ПРОДУЦЕНТ-КОНСУМЕНТ"
CHLORELLA VULGARIS (ALGAE)
PARAMECIUM CAUDATUM (PROT.)
Аннотация: Создана экспериментальная модель замкнутой экосистемы "продуцент-консумент" (Chlorella vulgaris-Paramecium caudatum) с пространственно разделенными звеньями. Данная экосистема существовала около 7 мес. В течение 60 сут численность звеньев достигала стационарного состояния. Исследована динамика трех форм азотистых соединений: азота в аммонийной, нитратной и нитритной формах. Показана роль хищника в круговороте азота, выявлена прямая зависимость между размножением простейших и выделением ими азота в аммонийной форме, к-рая наиболее предпочтительна для роста хлореллы. Обнаружено появление и монотонное увеличение конц-ии азота в нитритной форме от 0 до 300 мг/л. Предполагается, что данная форма азота является продуктом метаболизма клеток хлореллы, не доступным ни их собственным ферментам, ни ферментам сопутствующей микрофлоры. Россия, Ин-т биофизики СО РАН, г. Красноярск, 660036. Библ. 10
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7.

Вид документа : Статья из журнала
Шифр издания : 621.99. VINITI/Э 64
Автор(ы) : Кокова В.Е., Печуркин В.Н., Броднев П.В., Темерова Т.А., Печуркин Н.С.
Заглавие : Эндосимбиоз (зоохлорелла- инфузория) как простейшая модель биотического цикла : научное издание
Коллективы :
Место публикации : Препр. - 1992. - N 189Б. - С. 1-32
ГРНТИ : 62.99
Предметные рубрики: МАТЕМАТИЧЕСКИЕМОДЕЛИ
ЭНДОСИМБИОЗЗООХЛОРЕЛЛА-ИНФУЗОРИЯ
КУЛЬТИВИРОВАНИЕ
ПРОТОЧНОЕ
Аннотация: Изучалось функционирование симбиоза, состоящего из инфузории Paramecium bursaria и ее эндосимбионта зоохлореллы при разных условиях. Минеральная среда обеспечивает жизнедеятельность симбиоза за счет фотосинтеза зоохлорелл. Избыточное органическое питание (дрожжи, глюкоза) инфузории-хозяина при удельной скорости роста культуры 0,016-0,046 ч{-1} способствует разрушению симбиоза на свету и в темноте в течение нескольких месяцев. Разработана математическая модель, описывающая схемы энергетических потоков и взаимодействие симбионтов в проточной культуре
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khromechek E.B., Musonova M.V., Barkhatov Y.V.
Заглавие : Effect of symbiotic algae on the photoaccumulation capacity of cells of the ciliate Paramecium bursaria
Место публикации : Tsitologiya. - 2002. - Vol. 44, Is. 3. - С. 317. - ISSN 00413771 (ISSN)
Аннотация: The character of the effect produced by symbiotic algae on photodependent behavior of their host ciliates, Paramecium bursaria, was determined. Partially alga-freed paramecia showed a reliable increase in the rates of photoaccumulation. The photoaccumulation rate gradually decreased with a further decrease in the number of zoochlorellae. Once the chlorophyll content fell down to 20-25 ?/1, the ciliates lost their capacity for photoaccululation. A mathematical model of photoaccumulation has been constructed.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Barkhatov Yu.V., Khromechek E.B., Gubanov V.G.
Заглавие : Effects of the bacterial component on the viability of the Paramecium bursaria symbiotic complex (Infusorian-Zoochlorella)
Место публикации : Russian Journal of Ecology. - 2001. - Vol. 32, Is. 4. - С. 261-265. - ISSN 10674136 (ISSN) , DOI 10.1023/A:1011314622045
Ключевые слова (''Своб.индексиров.''): endosymbiosis--matter exchange cycle--paramecium bursaria--bacterium--symbiosis--viability--algae--bacteria (microorganisms)--ciliophora--paramecium--paramecium bursaria--zoochlorella
Аннотация: A hypothesis is considered that the establishment and maintenance of mass exchange processes in the Paramecium bursaria symbiotic complex (infusorian-alga) depends on the presence of the third component-bacteria-whose role is underestimated but essential for completing the exchange cycle. The role of this component in the symbiotic cycle of Paramecium bursaria is possible to reveal using special bactericidal preparations specifically inhibiting the bacteria involved in the metabolic cycle but having no effect on the functions of the host cell and the zoochlorella population. Experiments with various preparations of this type were performed, and the response to treatment was estimated from growth rates of the symbiotic complex and its components. This allowed identification of an antibiotic (rifampicin) that had no adverse influence on free-living zoochlorella and chlorella-free paramecia (the basic components of the symbiotic cycle) but drastically inhibited the growth of the P. bursaria symbiotic complex, which could be interpreted as evidence in favor of the hypothesis concerning the existence of the third symbiotic component.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Barkhatov Yu.V., Gubanov V.G., Sazonova V.E.
Заглавие : On the cooperative effect of organic and mineral substrates on growth rates of symbionts in the symbiotic complex Paramecium bursaria-Zoochlorella
Место публикации : Russian Journal of Ecology. - 1998. - Vol. 29, Is. 4. - С. 287-289. - ISSN 10674136 (ISSN)
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Bogdanova O.N.
Заглавие : An experimental study and a mathematical model of interactions in a mixed culture of invertebrates and algae in the Producer-Consumer aquatic biotic cycle
Колич.характеристики :6 с
Место публикации : Biofizika: MEZHDUNARODNAYA KNIGA, 2004. - Vol. 49, Is. 6. - С. 1112-1117. - ISSN 0006-3029
Примечания : Cited References: 22
Предметные рубрики: PREY
Ключевые слова (''Своб.индексиров.''): 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 producer-consumer aquatic biotic cycle with spatially divided links was constructed. The model describes the dynamics of a mixed culture of infusoria and rotifera in the consumer link, when they consume a mixed culture of algae coming from the producer 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 producer link with invertebrates in the consumer link in the producer-consumer aquatic biotic cycle is impossible because of the displacement of infusoria P. caudatum by rotifera Brachionus plicatilis.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I.
Заглавие : Experimental and mathematical model of the interactions in the mixed culture of links in the "producer-consumer" cycle
Колич.характеристики :7 с
Коллективы : Russia Foundational Research Foundation and Krasnoyarsk Regional Science Foundation [07-05-96807]
Место публикации : Adv. Space Res.: ELSEVIER SCI LTD, 2009. - Vol. 44, Is. 2. - С. 177-183. - ISSN 0273-1177, DOI 10.1016/j.asr.2009.01.022
Примечания : Cited References: 20. - This study is supported by the grant of Russia Foundational Research Foundation and Krasnoyarsk Regional Science Foundation No. 07-05-96807.
Предметные рубрики: COMPETITION
Ключевые слова (''Своб.индексиров.''): competition--metabolite interaction--invertebrates--mixed culture
Аннотация: The paper presents a experimental and mathematical model of interactions between invertebrates (the ciliates Paramecium caudatum and the rotifers Brachionus plicatilis) in the "producer-consumer" aquatic biotic cycle with spatially separated components. The model describes the dynamics of the mixed culture of ciliates and rotifers ill the "consumer" component, feeding on the mixed algal culture of the "producer" component. It has been found that metabolites of the algae Seenedesmus produce an adverse effect on the reproduction of the ciliates P. caudatum. Taking into account this effect, the results of investigation of the mathematical model were in qualitative agreement with the experimental results. In the "producer-consumer" biotic cycle it was shown that coexistence is impossible ill the mixed culture of invertebrates of the "consumer" component. The ciliates P. caudatum are driven out by the rotifers B. plicatilis. (C) 2009 Published by Elsevier Ltd on behalf of COSPAR.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sarangova A.B., Somova L.A., Pisman T.I.
Заглавие : Catalase activity as a potential indicator of the reducer component of small closed ecosystems
Колич.характеристики :4 с
Место публикации : 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. - P1945-1948. - ISBN 0273-1177, DOI 10.1016/S0273-1177(97)00630-3. - ISBN 0-08-043307-3
Примечания : Cited References: 8
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.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Barkhatov Y.V., Gubanov V.G., Sazonova V.E.
Заглавие : On the cooperative effect of organic and mineral substrates on growth rates of symbionts in the symbiotic complex Paramecium bursaria-zoochlorella
Колич.характеристики :3 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 1998. - Vol. 29, Is. 4. - P287-289. - ISSN 1067-4136
Примечания : Cited References: 3
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Barkhatov Y.V., Khromechek E.B., Gubanov V.G.
Заглавие : Effects of the bacterial component on the viability of the Paramecium bursaria symbiotic complex (infusorian-zoochlorella)
Колич.характеристики :5 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 2001. - Vol. 32, Is. 4. - P261-265. - ISSN 1067-4136, DOI 10.1023/A:1011314622045
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): paramecium bursaria--endosymbiosis--matter exchange cycle
Аннотация: A hypothesis is considered that the establishment and maintenance of mass exchange processes in the Paramecium bursaria symbiotic complex (infusorian-alga) depends on the presence of the third component-bacteria-whose role is underestimated but essential for completing the exchange cycle. The role of this component in the symbiotic cycle of Paramecium bursaria is possible to reveal using special bactericidal preparations specifically inhibiting the bacteria involved in the metabolic cycle but having no effect on the functions of the host cell and the zoochlorella population. Experiments with various preparations of this type were performed, and the response to treatment was estimated from growth rates of the symbiotic complex and its components. This allowed identification of an antibiotic (rifampicin) that had no adverse influence on free-living zoochlorella and chlorella-free paramecia (the basic components of the symbiotic cycle) but drastically inhibited the growth of the P. bursaria symbiotic complex, which could be interpreted as evidence in favor of the hypothesis concerning the existence of the third symbiotic component.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Somova L.A.
Заглавие : Competition between links in "producer-consumer" trophic chains in an aquatic closed system with spatially separated components
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ECOLOGICAL SYSTEMS: EARTH AND SPACE APPLICATIONS. Ser. ADVANCES IN SPACE RESEARCH: ELSEVIER SCIENCE BV, 2001. - Vol. 27: F4 4 Symposium of COSPAR Scientific Commission F held at the 33rd COSPAR Scientific Assembly (JUL, 2000, WARSAW, POLAND), Is. 9. - P1599-1603. - ISBN 0273-1177, DOI 10.1016/S0273-1177(01)00255-1
Примечания : Cited References: 13
Аннотация: The work analyzes functioning of a "producer-consumer" closed aquatic system with spatially separated links, where each component consisted of two species. Producers in the system were the microalgae of Chlorella vulgaris and Scenedesmus sp., consumers - Paramecium caudatum infusoria and Brachionus sp. rotifers. In the experiment the competing predators were consuming on a mixed culture of algae, and the competition of algae was studied under nitrogen limitation. Under these conditions competitiveness of Scenedesmus was higher than that of Chlorella vulgaris. Metabolism products of Scenedesmus algae have been found to have negative effect on reproduction of Paramecium caudatum protozoa. Predator population dynamics in the "consumer" link demonstrated that the rotifers that consume two algal species are more competitive compared to protozoa feeding on chlorella only. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pisman T.I., Somova L.A.
Заглавие : Competition of the natural and manmade biotic cycles in the closed aquatic system
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ARTIFICIAL ECOSYSTEMS AND LIFE SUPPORT SYSTEMS. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2003. - Vol. 31: Meeting of F4 1 Session of the 34th Scientific Assembly of COSPAR (OCT, 2002, HOUSTON, TEXAS), Is. 7. - P1757-1761. - ISBN 0273-1177, DOI 10.1016/S0273-1177(03)00117-0
Примечания : Cited References: 10
Аннотация: This study addresses competition between the Paramecium bursaria and zoochlorella - endosymbiosis and the infusoria Paramecium caudatum in a closed aquatic system. The system is a natural model of a simple biotic cycle. P. bursaria consumes glucose and oxygen released by its zoochlorella and releases nitrogenous compounds and carbon dioxide necessary for algal photosynthesis. P. caudatum was fed on bacteria. It was shown that the infusoria P. bursaria united in one cycle with Chlorella had a higher competitive ability than P. caudatum. With any initial percentage of the infusoria in the mixed culture, the end portion of P. bursaria reached 90 - 99%, which was significantly higher than the end portion of the P. caudatum population. It is assumed that the sustenance expenditures of P. caudatum were greater than those of the endosymbiotic paramecium, i.e. the closing of the components into a biotic cycle leads to a decrease in sustenance expenditures. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Bogdanova O.N.
Заглавие : A mathematical model of the interactions in the mixed culture of invertebrates and algae in the "producer-consumer" aquatic biotic cycle
Колич.характеристики :9 с
Место публикации : Aquat. Ecol.: KLUWER ACADEMIC PUBL, 2004. - Vol. 38, Is. 3. - P415-423. - ISSN 1386-2588
Примечания : Cited References: 19
Предметные рубрики: RESOURCE COMPETITION
Ключевые слова (''Своб.индексиров.''): 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.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pisman T.I., Galayda Y.V., Shirobokova I.M.
Заглавие : Experimental and mathematical modeling of the consumer's influence on productivity of algae in a model aquatic ecosystem
Колич.характеристики :7 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ECOLOGICAL SYSTEMS: EARTH AND SPACE APPLICATIONS. Ser. ADVANCES IN SPACE RESEARCH-SERIES: PERGAMON-ELSEVIER SCIENCE LTD, 2005. - Vol. 35: Workshop on Closed Ecological Systems (JUL, 2004, Paris, FRANCE), Is. 9. - P1521-1527. - ISBN 0273-1177, DOI 10.1016/j.asr.2004.12.048
Примечания : Cited References: 10
Ключевые слова (''Своб.индексиров.''): producer--consumer--nitrogen cycling--mathematical modeling
Аннотация: A "producer-consumer" (Chlorella vulgaris-Paramecium caudatum) closed aquatic system has been investigated experimentally and theoretically. It has been found that there is a direct relationship between the growth of the paramecia population and their release of ammonia nitrogen, which is the best form of nitrogen for Chlorella growth. The theoretical study of a model of a "producer-consumer" aquatic biotic cycle with spatially separated compartments has confirmed the contribution of paramecia to nitrogen cycling. It has been shown that an increase in the concentration of nitrogen released as metabolites of paramecia is accompanied by an increase in the productivity of microalgae. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Evsyunina E. V., Taran D. O., Stom D. I., Saksonov M. N., Balayan A. E., Kirillova M. A., Esimbekova E. N., Kratasyuk V. A.
Заглавие : Comparative assessment of toxic effects of surfactants using biotesting methods
Место публикации : Inland Water Biol. - 2016. - Vol. 9, Is. 2. - С. 196-199. - ISSN 19950829 (ISSN) , DOI 10.1134/S1995082916020061
Ключевые слова (''Своб.индексиров.''): algae--bioluminescent bacteria--biotesting--daphnia--fluorescence of chlorophyll--infusorian--surfactants--survival--toxic effect--algae--ciliophora--crustacea--daphnia--daphnia magna--paramecium caudatum--photobacterium phosphoreum--protozoa--scenedesmus quadricauda
Аннотация: This study assesses the comparative sensitivity and possibility of obtaining fast results of various methods of biotesting for several surfactants: Tween 85, sodium dodecyl sulfate (SDS), Fairy dishwashing gel, and Mif washing powder. The following test organisms are used for the study: luminescent bacteria Photobacterium phosphoreum (Beijerinck), preparation of Ecolum luminescent bacteria, unicellular algae Scenedesmus quadricauda (G.M. Smith), infusorian Paramecium caudatum (Ehrenberg), and crustacean Daphnia magna (Straus). It has been revealed that Fairy dishwashing gel possesses the strongest toxicity against the studied test objects. Daphnia and algae are most sensitive to the effects of Fairy and SDS, protozoan and luminescent bacteria are most sensitive to SDS, and Ecolum is most sensitive to Mif washing powder. The tested aquatic organisms and Ecolum are most tolerant to the effect of Tween 85. © 2016, Pleiades Publishing, Ltd.
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