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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Degermendzhi A.G., Pechurkin N.S., Terskov I.A.
Заглавие : Criterion of steady-state coexistence of continuous microbial populations
Место публикации : Doklady Biophysics. - 1979. - Vol. VOL 244-246. - С. 82-85. - ISSN 00124974 (ISSN)
Ключевые слова (''Своб.индексиров.''): animal experiment--bacterial growth--bacterium culture--ecology--in vitro study--nonbiological model--preliminary communication
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Kokova V.E., Spitskaya N.I.
Заглавие : CONTINUOUS CULTIVATION OF SOME WATER INVERTEBRATES
Место публикации :. - 1984. - Third European Congress on Biotechnology., Munich, W Ger) Conference code: 6973. - P539-543
Ключевые слова (''Своб.индексиров.''): marine biology--artificial ecological systems--continuous cultivation--population growth rate--range conditions--suspended nutrients--water invertebrates--ecology
Аннотация: Continuous cultivation of water invertebrates facilitates the study of their biological characteristics and productivity and hence contributes to creation of artifical ecological systems. When applying the technique, suspended nutrients are being passed through the cultivator and culture is outflowing continuously, with the volume inside the vessel being constant. The objective of the study is to examine the effect of a range conditions of cultivating on population growth rate.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gitelson I.I., Levin L.A.
Заглавие : Bioluminescence in oceanology.
Место публикации : Journal of bioluminescence and chemiluminescence. - 1989. - Vol. 4, Is. 1. - С. 555-562. - ISSN 08843996 (ISSN)
Ключевые слова (''Своб.индексиров.''): article--biology--circadian rhythm--ecology--gas--instrumentation--luminescence--oceanography--circadian rhythm--ecology--gases--luminescence--marine biology--oceanography
Аннотация: For analytical purposes bioluminescence can be used in three main ways: 1. luminescence measurement of bioluminescent system components isolated in vitro; 2. determination of luminous organisms' reaction to the in vivo test-action; 3. measurement of bioluminescence in marine ecological systems. The majority of the reports of this Symposium are dealing with the first two topics. The aim of our presentation is to draw attention to the third one. The possibilities of bioluminescent analysis are wider than its traditional scheme of applications in the laboratory, when the emitting system is withdrawn from a native source and is placed in a cuvette of the light measuring device. The reverse scheme is also possible, i.e. the device can be introduced into light emitting system such as a marine biocenosis--the community of the sea inhabitants--where we obtain a highly sensitive and rapid means of gaining the information on the vital activity of marine ecosystems, i.e. their spatial structure, rhythms, man's influence upon them, etc. The present communication will consider the possibilities of this form of bioluminescent analysis.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Kalachova G.S., Guseynova V.E.
Заглавие : Rapid assay of fatty acid composition using a portable high-performance liquid chromatograph for monitoring aquatic ecosystems
Место публикации : Journal of Chromatography A. - 1995. - Vol. 695, Is. 2. - С. 223-228. - ISSN 00219673 (ISSN) , DOI 10.1016/0021-9673(94)01090-2
Ключевые слова (''Своб.индексиров.''): fatty acid--alga--article--culture medium--ecology--high performance liquid chromatography--instrument--methodology--priority journal--ultraviolet spectrophotometry--water analysis
Аннотация: The chromatographic conditions presented allowed the separation of the nitrophenacyl derivatives of standards of eleven free fatty acids (FFA) using a portable high-performance chromatograph, suitable for use aboard a research vessel. A statistically significant linear correlation between UV absorbance and amount of the analytes injected was obtained. The method was tested on FFA from algae cultural media. The method can be used for the ecological monitoring of natural waters.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G.
Заглавие : The influence of population density of Moina macrocopa (Cladocera) and food supply on the change of reproducing type in M-macrocopa
Колич.характеристики :2 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 1995. - Vol. 26, Is. 5. - С. 381-382. - ISSN 1067-4136
Примечания : Cited References: 8
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bazykin A.D., Berezovskaya F.S., Isaev A.S., Khlebopros R.G.
Заглавие : Dynamics of forest insect density: Bifurcation approach
Место публикации : Journal of Theoretical Biology. - 1997. - Vol. 186, Is. 3. - С. 267-278. - ISSN 00225193 (ISSN) , DOI 10.1006/jtbi.1996.0363
Ключевые слова (''Своб.индексиров.''): article--ecology--forest--insect--nonhuman--population density--population dynamics--population model--priority journal
Аннотация: Six basic phase portraits differing in character and in the number of their equilibrium behaviour regimes were suggested in the classification of forest insect population dynamics. The portraits graphically illustrate six types of dynamic behavior of numbers of the system 'phytophage-entomophage': two types of stable equilibrium dynamics (stationary and oscillatory) and four types corresponding to outbreaks of mass reproduction - fixed, permanent, reversive and true outbreaks, respectively. In this paper we consider the single parameter model, with its parametric domains realizing a wide spectrum of phase dynamics, both basic and transitional. The changes in the phase portraits are accompanied by the bifurcations in the model. The results of these analyses are in agreement with the 'stability principle of mobile ecological systems' and may supply its parameter substantiation at the model level.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S.
Заглавие : The effect of conditioned water upon the fecundity of moina macrocopa females
Место публикации : Russian Journal of Ecology. - 1997. - Vol. 28, Is. 3. - С. 205-207. - ISSN 10674136 (ISSN)
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Borodina E.V., Tirranen L.S., Titova G.T., Kalacheva G.S.
Заглавие : The effects of acetaldehyde and ethylene on growth of reference cultures of microorganisms
Место публикации : Russian Journal of Ecology. - 1997. - Vol. 28, Is. 3. - P197-199. - ISSN 10674136 (ISSN)
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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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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) : Kalacheva G.S., Zadereev E.S., Gubanov V.G., Gribovskaya I.V.
Заглавие : Chemical composition of water conditioned by crowded Moina macrocopa (Crustacea: Cladocera)
Место публикации : Russian Journal of Ecology. - 2000. - Vol. 31, Is. 2. - С. 113-117. - ISSN 10674136 (ISSN)
Ключевые слова (''Своб.индексиров.''): chemical analysis--chemical composition--cladocera--metabolic products
Аннотация: The chemical composition of water conditioned by colonies of Moina macrocopa and involved in the regulation of their life cycle was analyzed in comparison with water samples from natural water bodies. Dechlorinated tap water was used as the control medium. The results showed that metabolism of crustaceans leads to an increase in the concentrations of phosphorus and nitrogen in all forms, the appearance of protein and carbohydrate fractions, and changes in the composition of lipid fractions in the water conditioned by their colonies. The contents of all organic components are very low, which makes their identification difficult. Concentrations of substances identified in the conditioned water do not exceed those occurring in nature. В© 2000 MAIK "Nauka/Interperiodica".
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Zadereev E.S., Gubanov V.G., Gribovskaya I.V.
Заглавие : Chemical composition of water conditioned by crowded Moina macracopa (Crustacea : Cladocera)
Колич.характеристики :5 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 2000. - Vol. 31, Is. 2. - P113-117. - ISSN 1067-4136, DOI 10.1007/BF02828365
Примечания : Cited References: 25
Предметные рубрики: DAPHNIA-PULEX
ZOOPLANKTON
PARAMETERS
INDUCTION
Ключевые слова (''Своб.индексиров.''): cladocera--metabolic products--chemical analysis--chemical composition
Аннотация: The chemical composition of water conditioned by colonies of Moina macrocopa and involved in the regulation of their life cycle was analyzed in comparison with water samples from natural water bodies. Dechlorinated tap water was used as the control medium. The results showed that metabolism of crustaceans leads to an increase in the concentrations of phosphorus and nitrogen in all forms, the appearance of protein and carbohydrate fractions, and changes in the composition of lipid fractions in the water conditioned by their colonies. The contents of all organic components are very low, which makes their identification difficult. Concentrations of substances identified in the conditioned water do not exceed those occurring in nature.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Brilkov A.V., Ganusov V.V., Morozova E.V., Pechurkin N.S.
Заглавие : Computer modeling of the biotic cycle formation in a closed ecological system
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1587-1592. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00253-8
Ключевые слова (''Своб.индексиров.''): ecology--energy utilization--mathematical models--biotic turnover--predators--space research--artificial ecosystem--alga--animal--article--biological model--computer simulation--cyprinodontiformes--daphnia--ecosystem--energy metabolism--evolution--food chain--microclimate--plankton--algae--animals--computer simulation--daphnia--ecological systems, closed--ecosystem--energy metabolism--evolution--food chain--models, biological--plankton--poecilia
Аннотация: The process of biotic turnover in a closed ecological system (CES) with an external energy flow was analyzed by mathematical modeling of the biotic cycle formation. The formation of hierarchical structure in model CESs is governed by energy criteria. Energy flow through the ecosystem increases when a predator is introduced into a "producer-reducer" system at steady state. Analysis of the model shows that under certain conditions the presence of the primary predator with its high mineralization ability accelerates the biotic turnover measured by primary production. We, therefore, conclude that for every system it is possible to find a suitable predator able to provide the system with a higher biotic turnover rate and energy consumption. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Shirobokova I.M.
Заглавие : Closed artificial ecosystems as a means of ecosystem studies for earth and space needs
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1497-1504. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00244-7
Ключевые слова (''Своб.индексиров.''): artificial ecosystem--bioremediation--biosphere--ecosystem--environmental monitoring--model--bioremediation--ecology--ecosystems--health--biosphere--space research--artificial ecosystem--biodegradation, environmental--earth (planet)--ecological systems, closed--ecology--ecosystem--energy transfer--environmental microbiology--life support systems--population dynamics--yeasts
Аннотация: Closed Artificial ecosystems (CAES) have good prospects for wide use as new means for quantitative studies of different types of both natural ecosystems and man-made ones. The paper deals with the discussion of three points of CAES applications. The first one is of importance for theoretical ecology development and is connected with bringing together В«holisticВ» and В«merologicalВ» approaches in ecosystems studies. Using CAES, we can combine both approaches, taking into account the biotic turnover of limiting substrates which few in number even for complicated natural ecosystems. The second CAES use concerns the development of В«ecosystems healthВ» concept and application of a key-factor-approach for the indication and measurement of healthy unhealthy state and functioning of ecosystems or their links. The third use is more of an applied nature, oriented to the intensification of bioremediation or biodepollution processes in different types of ecosystems, including the global biosphere. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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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 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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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trusova M.Yu., Gladyshev M.I.
Заглавие : Phylogenetic diversity of winter bacterioplankton of eutrophic Siberian reservoirs as revealed by 16S rRNA gene sequences
Место публикации : Microbial Ecology. - 2002. - Vol. 44, Is. 3. - С. 252-259. - ISSN 00953628 (ISSN) , DOI 10.1007/s00248-002-2020-1
Ключевые слова (''Своб.индексиров.''): bacterioplankton--community composition--community dynamics--genetic variation--phylogenetics--reservoir--winter--russian federation--actinobacteria--bacteria (microorganisms)--bacteroides--betaproteobacteria--cyanobacteria--cytophaga--flavobacterium--prokaryota--proteobacteria--bacterial dna--fresh water--rna 16s--animal--article--bacterium--chemistry--dna sequence--genetic variability--genetics--microbiology--molecular genetics--phylogeny--plankton--russian federation--season--animals--bacteria--dna, bacterial--fresh water--molecular sequence data--phylogeny--plankton--rna, ribosomal, 16s--seasons--sequence analysis, dna--siberia--variation (genetics)
Аннотация: Using 16S rRNA gene sequence analyses we investigated the bacterial diversity of winter bacterioplankton of two eutrophic Siberian reservoirs. These reservoirs show similarity in phytoplankton community composition in spring and autumn but tend to differ in summer in exhibiting cyanobacterial bloom. Forty-eight unique partial 16S RNA gene sequences retrieved from two libraries were mostly affiliated with the class Actinobacteria, ? subdivision of the class Proteobacteria, and the phylum Cytophaga-Flavobacterium-Bacteroides. The clone library of the pond exhibiting summer cyanobacterial bloom showed more diversity in sequence composition. A significant number of bacterial 16S rRNA gene clones were closely related to freshwater bacteria previously found in different aquatic ecosystems. This finding confirms the assumption that some bacterial clades are globally distributed.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolmakov V.I., Gaevskii N.A., Ivanova E.A., Dubovskaya O.P., Gribovskaya I.V., Kravchuk E.S.
Заглавие : Comparative analysis of ecophysiological characteristics of Stephanodiscus hantzschii Grun. in the periods of its bloom in recreational water bodies
Место публикации : Russian Journal of Ecology. - 2002. - Vol. 33, Is. 2. - С. 97-103. - ISSN 10674136 (ISSN) , DOI 10.1023/A:1014448707663
Ключевые слова (''Своб.индексиров.''): chlorophyll a--efficiency in using photosynthetically active radiation--stephanodiscus hantzschii grun.--algal bloom--comparative study--ecophysiology--photosynthetically active radiation--stephanodiscus hantzschii
Аннотация: In the periods of summer and autumn bloom of the Stephanodiscus hantzschii Crun. in recreational water bodies, studies on the vertical distribution of chlorophyll a, its contents per unit biomass, efficiency in using photosynthetically active radiation (EPhAR), and assimilative activity of microalgae were performed. The results confirmed the existence of two ecophysiological forms of St. hantzschii and provided evidence that both forms are typically autotrophic and can efficiently use low-intensity PhAR for photosynthesis.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trusova M.Y., Gladyshev M.I.
Заглавие : Phylogenetic diversity of winter bacterioplankton of eutrophic Siberian reservoirs as revealed by 16S rRNA gene sequences
Колич.характеристики :8 с
Место публикации : Microb. Ecol.: SPRINGER-VERLAG, 2002. - Vol. 44, Is. 3. - P252-259. - ISSN 0095-3628, DOI 10.1007/s00248-002-2020-1
Примечания : Cited References: 34
Предметные рубрики: RIBOSOMAL-RNA ANALYSIS
COMMUNITY COMPOSITION
BACTERIAL DIVERSITY
LAKE
IDENTIFICATION
BIODIVERSITY
CULTIVATION
TAXONOMY
DYNAMICS
RIVER
Аннотация: Using 16S rRNA gene sequence analyses we investigated the bacterial diversity of winter bacterioplankton of two eutrophic Siberian reservoirs. These reservoirs show similarity in phytoplankton community composition in spring and autumn but tend to differ in summer in exhibiting cyanobacterial bloom. Forty-eight unique partial 16S RNA gene sequences retrieved from two libraries were mostly affiliated with the class Actinobacteria, beta subdivision of the class Proteobacteria, and the phylum Cytophaga-Flavobacterium-Bacteroides The clone library of the pond exhibiting summer cyanobacterial bloom showed more diversity in sequence composition. A significant number of bacterial 16S rRNA gene clones were closely related to freshwater bacteria previously found in different aquatic ecosystems. This finding confirms the assumption that some bacterial clades are globally distributed.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lobova T.I., Barkhatov Y.V., Popova L.Y.
Заглавие : Antibiotic resistance of heterotrophic bacteria in Shira lake: natural and anthropogenic impacts
Колич.характеристики :8 с
Место публикации : Aquat. Microb. Ecol.: INTER-RESEARCH, 2002. - Vol. 30, Is. 1. - P11-18. - ISSN 0948-3055, DOI 10.3354/ame030011
Примечания : Cited References: 33
Предметные рубрики: MARINE-BACTERIA
DIVERSITY
POLLUTION
COMMUNITY
PATTERNS
PLANTS
Ключевые слова (''Своб.индексиров.''): heterotrophic bacteria--halotolerance--antibiotic resistance--anthropogenic load--brackish lake--mathematical modeling
Аннотация: Studies were conducted to investigate the antibiotic resistance of freshwater, halophile and moderate halotolerant bacteria isolated from the nearshore part of Shira lake, which is affected by the activity of a health resort, and from the central part of the lake in the summer (June to August) of 1999. It has been shown that the allochthonous microflora, which is brought into the lake with the resort effluent in mid-summer, is the anthropogenic factor contributing to an increase in the number of freshwater bacteria that feature multiple antibiotic resistance in the central part of the lake. It has been found that resistance to ampicillin of freshwater and halophile heterotrophic bacteria is related to the increase in the biomass of blue-green and green algae in the central part of Shira lake between mid-July and the end of August. A mathematical model has been constructed to describe the dynamics of the antibiotic resistance of heterotrophic bacteria in the close-to-resort and the central parts of Shira lake under natural and anthropogenic impacts.
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