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Вид документа : Статья из журнала
Шифр издания : 577.34/И 73
Автор(ы) : Болсуновский, Александр Яковлевич, Трофимова, Елена Александровна, Дементьев, Дмитрий Владимирович, Карпов, Антон Дмитриевич
Заглавие : Интенсивность накопления урана-238 представителями разных экологических уровней экосистемы р. Енисей
Коллективы : Институт биофизики Сибирского отделения Российской Академии наук (Красноярск)
Место публикации : Вестник Томского государственного университета. Биология. - Томск: Национальный исследовательский Томский государственный университет, 2016. - № 2 (34) . - С. 161-171. - DOI 10.17223/19988591/34/11
ISSN: 1998-8591
УДК : 577.34 + 597.5
Ключевые слова (''Своб.индексиров.''): коэффициент накопления--трофический уровень--philolimnogammarus viridis--fointinalis antipyretica--thymallus arcticus--esox lucius)
Аннотация: В результате многолетних исследований (2010-2013) получены данные по накоплению урана-238 в гидробионтах разных трофических уровней экосистемы р. Енисей. Пробы водного мха (Fointinalis antipyretica), зообентоса (Philolimnogammarus viridis и Ph. Cyaneus), сибирского хариуса (Thymallus arcticus) и щуки (Esox lucius) отбирали в районе ранее зарегистрированного повышенного содержания урана в воде р. Енисей (вблизи радиоактивных сбросов Горно-химического комбината Росатома). Показано, что уран способен эффективно накапливаться из воды в биомассе всех исследованных гидробионтов. Максимальные коэффициенты накопления (КН) урана получены для водного мха, что многократно превышает КН урана для зообентоса и мышечной ткани рыб. Средние значения КН урана для зообентоса статистически значимо превышают КН в мышцах рыб за весь период наблюдения. Не выявлено статистически значимых отличий в накоплении урана рыбами разного трофического уровня (хариус и щука)The aim of the research was a comparative evaluation of the intensity of uranium-238 accumulation in the biomass of aquatic organisms, occupying different trophic levels in the ecosystem of the Yenisei river. Previously, uranium-238 at concentrations higher than the background ones was detected in water and sediment samples of the Yenisei River collected close to the discharge site of one of the Rosatom facilities (the Mining-and-Chemical Combine). However, radioecological studies of the Yenisei River ecosystem have not focused on uranium isotopes in aquatic organisms so far. The toxic effects of uranium on living organisms are known to be based on its both radioactive and chemical properties. We conducted a study on accumulation of uranium-238 in aquatic organisms at different trophic levels in the Yenisei River ecosystem between 2010 and 2013. We collected samples of aquatic moss (Fointinalis antipyretica), zoobenthos (Philolimnogammarus viridis and Ph. cyaneus), arctic grayling (Thymallus arcticus), and pike (Esox lucius) from the Yenisei region at a distance of 85-90 km downstream of Krasnoyarsk (5-10 km downstream of the radioactive discharge of the Mining-and-Chemical Combine). Data on samples are shown in Table 1. We determined uranium concentration in the samples of aquatic organisms by neutron activation analysis, in water - by ICP-MS (Table 2). The study shows that uranium can be effectively concentrated from water and accumulate in the biomass of all aquatic organisms used in experiments. The highest uranium concentration factors (CFs) were obtained for aquatic moss, and they were several times higher than the uranium CFs for zoobenthos and fish muscles. Based on the uranium concentration from water, all aquatic organisms of the Yenisei River used in this study can be ranked as follows: aquatic moss gammarids grayling = pike. No statistically significant difference has been found between uranium accumulation by fish of different trophic levels (Arctic grayling and pike). The uranium CFs obtained in this study is comparable with the literature data on the CFs of artificial radionuclides for aquatic moss and fish of the Yenisei River
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : 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.
Заглавие : Vertical stratification of physical, chemical and biological components in two saline lakes Shira and Shunet (South Siberia, Russia)
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 619-632. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9336-6
Ключевые слова (''Своб.индексиров.''): 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).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Degermendzhy A.G., Gulati R.D.
Заглавие : Understanding the mechanisms of blooming of phytoplankton in Lake Shira, a saline lake in Siberia (the Republic of Khakasia)
Место публикации : Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - С. 331-340. - ISSN 13862588 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon budget--cyanobacteria--heterotrophic bacteria--hydrogen sulphide--mathematical models of stratification--meromictic lakes--microbial loop--stratification--trophic scheme--algal bloom--ecosystem modeling--limiting factor--nutrient availability--phytoplankton--saline lake--trophic interaction--russian federation--algae--bacteria (microorganisms)--cyanobacteria--lyngbya--lyngbya contorta
Аннотация: The paper summarises the results of a three-year research study (European Union Grant: INTAS 97-0519) aimed at investigating the planktonic populations and trophic organization of the Lake Shira ecosystem - a saline lake in Khakasia, Siberia. The lake exhibits a stable summer-autumn stratification of the chemical-biological components. The mechanisms responsible for the 'blooming' of phytoplankton in the deeper layers were investigated in greater detail, using data from both field and laboratory experiments. The spectra of nutrition were examined to estimate the relationships between the specific growth rates of the hydrobionts and the influence of the limiting factors: light, nutrients. The observed heterotrophic capability of a metalimnetic phytoplankton population might help explain the development in the deeper waters of Lyngbya contorta. The scheme of trophic interactions was put up, based on the assessment of the carbon pools and carbon flows in the pelagic zone of the lake. A mathematical model of the vertical structure of the lake's plankton populations was constructed, using the ecosystem description and data of vertical turbulent diffusion. The role of light and nutrient limitations and grazing mortality in forming the vertical inhomogeneities, particularly in lowering the depth of the maximal cyanobacterial biomass, has been demonstrated. The theoretical curves for the stratification of chemical and biological parameters have been brought in conformity with the field observations, e.g. for the different patterns of the peaks, and for the biomass maxima of cyanobacteria, purple and green sulphur bacteria, oxygen, and hydrogen sulphide. The calculations revealed that for an adequate assessment of the parameters for the hydrogen sulphide zone it is necessary to introduce flows of allochthonous organic matter. Based on the form of the sulphur distribution curve, the allochthonous input of organic matter and the inflow of hydrogen sulphide from the bottom have been theoretically discriminated for the first time. It has also been ascertained that irrespective of the depth the allochthonous substances limiting bacterial growth, the bacteria are uniformly distributed over depth and can serve as an indicator of the presence of limitation (the effect of autostabilisation in space). Of indisputable interest to limnology are the specific methods developed for understanding the functioning of Lake Shira ecosystem. These include the autostabilisation of the limiting factors, the on-the-spot fluorescent method of determining the three classes of microalgae, the algal mixotrophy and the planktonic population interactions and feedbacks, and development of a more sensitive, bioluminescent method for mapping the nonhomogeneities. Owing to a balanced combination of classical approaches (field observations, in situ data on production-decomposition) and the more recent ones (satellite monitoring, biophysical methods of estimating interactions of populations, mathematical models based on the field and experimental data), many of the structural-function relationships in the ecosystem can now be explained, and the models can provide 'mutual control and mutual agreement' between the data collected using different approaches.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A., Vysotskaya G., Sidko A., Dunaev K.
Заглавие : Typification of natural seasonal dynamics of vegetation to reveal impact of land surface change on environment (by satellite data)
Место публикации : Advances in Space Research. - 2000. - Vol. 26, Is. 7. - С. 1169-1172. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(99)01142-4
Ключевые слова (''Своб.индексиров.''): ecological modeling--ecosystem health--land surface--satellite data--vegetation dynamics
Аннотация: Deep insight into types of vegetation variability provided by AVHRR space scanner images of vegetation index spatial distribution helps reveal impact of land surface changes on environment. The Institute of Computational Modeling SB RAS has developed nonparametric algorithms of automatic to classify and recognize patterns of these images which helped to reveal: (1) major variability types (generally connected); (2) areas belonging to small classes, which can be used to reveal deviations from 'normal' (e.g., forest fires, etc.); (3) deviation from a certain type of dynamics indicative of changes in condition of plants, which can be used to diagnose pathology at early stages; (4) impact of economical activities on vegetation in Norilsk area. The authors provide biological interpretation of the satellite data. Computer-animated dynamics and color maps are presented. Nonparametric algorithms of an automatic classification and pattern recognition were provided by the Institute of Computational Modeling SB RAS. (C) 2000 COSPAR. Published by Elsevier Science Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Makhutova O.N., Kalachova G.S.
Заглавие : Trophic fractionation of isotope composition of polyunsaturated fatty acids in the trophic chain of a river ecosystem
Место публикации : Doklad. Biochem. Biophys. - 2014. - Vol. 454, Is. 1. - С. 4-5. - ISSN 16076729 (ISSN) , DOI 10.1134/S1607672914010025
Предметные рубрики: Biochemistry, general
Biophysics and Biological Physics
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bolsunovsky, A. Ya., Dementyev D. V., Vakhrushev V. I.
Заглавие : Transport of Artificial Radionuclides over Long Distances Downstream along the Yenisei River during the 1966 Extreme Flood Event
Колич.характеристики :5 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-44-240001]
Место публикации : Dokl. Earth Sci.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2021. - Vol. 498, Is. 2. - С. 514-518. - ISSN 1028-334X, DOI 10.1134/S1028334X21060052. - ISSN 1531-8354(eISSN)
Примечания : Cited References:12. - This study was supported in part by the Russian Foundation for Basic Research, project no. 18-44-240001.
Предметные рубрики: SEDIMENTS
ELEMENTS
Аннотация: Long-term research has revealed layers with abnormally high concentrations of Cs-137 in bottom sediments and alluvial soils in the floodplain of the Yenisei River at various distances (as far as 820 km) downstream from the radioactive discharge point of the Mining-and-Chemical Combine (MCC) of Rosatom. The highest activity concentration of Cs-137 in these layers reached 26 000 Bq/kg, which was higher than the Cs-137 maximum at the well-known radioactive anomaly in the Yeniseisk riparian zone (330 km downstream from the MCC), which was formed during the 1966 extreme flood event. The radionuclide composition and the Cs-137/Eu-152 and Cs-137/Co-60 ratios in the anomalous layers studied were the same as those at the Yeniseisk anomalous site, suggesting that they had the same origin by the transport of sediments from the MCC area during the 1966 extreme flood event. The transport of radioactive bottom sediments over long distances from the MCC discharge point downstream along the Yenisei River during the 1966 extreme flood event may continue to pose a possible radiation hazard to the river ecosystem and residents of riverside villages.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Krylov A.V., Sushchik N.N., Malin M.I., Makhutova O.N., Chalova I.V., Kalacheva G.S.
Заглавие : Transfer of essential polyunsaturated fatty acids from an aquatic to terrestrial ecosystem through the fish-bird trophic pair
Место публикации : Doklady Biological Sciences. - 2010. - Vol. 431, Is. 1. - С. 121-123. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496610020146
Ключевые слова (''Своб.индексиров.''): fatty acid--fresh water--triacylglycerol--unsaturated fatty acid--animal--article--biological model--biomass--bird--chemistry--ecosystem--fish--food chain--metabolism--muscle--pathology--physiology--species difference--animals--biomass--birds--ecosystem--fatty acids--fatty acids, unsaturated--fishes--food chain--fresh water--models, biological--muscles--species specificity--triglycerides--aves
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpowicz M., Feniova I., Gladyshev M. I., Ejsmont-Karabin J., Gorniak A., Sushchik N. N., Anishchenko O. V., Dzialowski A. R.
Заглавие : Transfer efficiency of carbon, nutrients, and polyunsaturated fatty acids in planktonic food webs under different environmental conditions
Место публикации : Ecology and Evolution: John Wiley and Sons Ltd, 2021. - Article in press. - ISSN 20457758 (ISSN), DOI 10.1002/ece3.7651
Аннотация: The trophic transfer efficiency (TTE) is an important indicator of ecosystem functioning. However, TTE data from freshwater food webs are ambiguous due to differences in time scales and methods. We investigated the transfer of essential substances (carbon, nutrients, and polyunsaturated fatty acids) through plankton communities in 30 Polish lakes with different trophic status in the middle of summer. The results of our study revealed that different essential substances were transferred from phytoplankton to zooplankton with varying efficiencies. The average TTE of C, N, P, and the sum of ?-3 PUFA were 6.55%, 9.82%, 15.82%, and 20.90%, respectively. Our results also show a large mismatch between the elemental and biochemical compositions of zooplankton and their food during the peak of the summer stagnation, which may further promote the accumulation of essential substances. There were also large differences in TTEs between trophic conditions, with the highest efficiencies in oligotrophic lakes and the lowest in dystrophic and eutrophic lakes. Therefore, our study indicates that disturbances like eutrophication and dystrophication similarly decrease the TTE of essential substances between phytoplankton and zooplankton in freshwater food webs. © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpowicz, Maciej, Feniova, Irina, Gladyshev, Michail I., Ejsmont-Karabin, Jolanta, Gorniak, Andrzej, Sushchik, Nadezhda N., Anishchenko, Olesya V., Dzialowski, Andrew R.
Заглавие : Transfer efficiency of carbon, nutrients, and polyunsaturated fatty acids in planktonic food webs under different environmental conditions
Колич.характеристики :14 с
Коллективы : Polish National Science Centre [2016/21/B/NZ8/00434]; Federal Tasks for Institute of Biophysics SB RAS [51.1.1]; Federal Tasks for Siberian Federal University [FSRG-2020-0019]
Место публикации : Ecol. Evol.: WILEY, 2021. - Article in press. - ISSN 2045-7758, DOI 10.1002/ece3.7651
Примечания : Cited References:62. - This research was supported by the Polish National Science Centre (2016/21/B/NZ8/00434). The research was also supported by Federal Tasks for Institute of Biophysics SB RAS No. 51.1.1 and Federal Tasks for Siberian Federal University No. FSRG-2020-0019. The authors are thankful to Joanna Kozowska for her help in the collection of samples.
Предметные рубрики: PHOSPHORUS STOICHIOMETRY
LIGHT-INTENSITY
ZOOPLANKTON
TEMPERATURE
Аннотация: The trophic transfer efficiency (TTE) is an important indicator of ecosystem functioning. However, TTE data from freshwater food webs are ambiguous due to differences in time scales and methods. We investigated the transfer of essential substances (carbon, nutrients, and polyunsaturated fatty acids) through plankton communities in 30 Polish lakes with different trophic status in the middle of summer. The results of our study revealed that different essential substances were transferred from phytoplankton to zooplankton with varying efficiencies. The average TTE of C, N, P, and the sum of omega-3 PUFA were 6.55%, 9.82%, 15.82%, and 20.90%, respectively. Our results also show a large mismatch between the elemental and biochemical compositions of zooplankton and their food during the peak of the summer stagnation, which may further promote the accumulation of essential substances. There were also large differences in TTEs between trophic conditions, with the highest efficiencies in oligotrophic lakes and the lowest in dystrophic and eutrophic lakes. Therefore, our study indicates that disturbances like eutrophication and dystrophication similarly decrease the TTE of essential substances between phytoplankton and zooplankton in freshwater food webs.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Degermendzhy A.G., Kosolapova L.G., Vlasik P.V.
Заглавие : Theory, computational method and software for prognosis of migration and distribution of radioactive matters in river ecosystem
Место публикации : COMPUTATIONAL METHODS IN WATER RESOURCES XI, VOL 2: COMPUTATIONAL METHODS IN SURFACE FLOW AND TRANSPORT PROBLEMS: COMPUTATIONAL MECHANICS PUBLICATIONS LTD, 1996. - 11th International Conference on Computational Methods in Water Resources (CMWR 96) (JUL, 1996, CANCUN, MEXICO). - С. 277-284. - 8. - ISBN 1-85312-487-7
Примечания : Cited References: 0
Ключевые слова (''Своб.индексиров.''): mathematical modelling--migration of radionuclides--river ecosystem
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kirensky L.V., Gitelson I.I., Terskov I.A., Kovrov B.G., Lisovsky G.M., Okladnikov Y.N.
Заглавие : Theoretical and experimental decisions in the creation of an artificial ecosystem for human life support in space.
Место публикации : Life sciences and space research. - 1971. - Vol. 9. - С. 75-80. - ISSN 00759422 (ISSN)
Ключевые слова (''Своб.индексиров.''): article--bacterium--biotechnology--chlorella--energy metabolism--human--instrumentation--man machine interaction--metabolism--microclimate--space flight--weightlessness--bacteria--biotechnology--chlorella--ecological systems, closed--energy metabolism--environment, controlled--humans--life support systems--man-machine systems--space flight--weightlessness
Аннотация: All of man's former space flights were not real ventures into space in the biological sense, as his life was supported with unregenerated earth supplies. The coming stage of space exploration requires man's long existence in the cosmos and on the other planets. This stage of man's activity outside the earth become possible only by creating small man-made ecosystems, permitting the support of his metabolism by the recycling of substances of the terrestrial biosphere. Creation of such systems is a new scientific and technical task. Man-made ecosystems are a new product of man's activity, which have no complete analogy, either in nature, or in technology. Stochastic mechanisms, which stabilize biogeocenosis, cannot be effective in small ecosystems. A technique of parametric control over biosynthesis made it possible to calculate, and put to practice, an ecosystem for man with a cyclic regeneration of the atmosphere, water and, partially, food. The specific bio-technological properties of small man-made ecosystems are being analysed. The possibility of their application for man's excursions into space and for the settlement of other planets is being considered.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vinogradov M.E., Gitelzon I.I., Sorokin Yu.I.
Заглавие : The vertical structure of a pelagic community in the tropical ocean
Место публикации : Marine Biology. - 1970. - Vol. 6, Is. 3. - С. 187-194. - ISSN 00253162 (ISSN) , DOI 10.1007/BF00347226
Аннотация: The vertical structure of the ecosystem in the euphotic zone of the western Equatorial Pacific has been studied. The studies were based on a continuous sounding of the bioluminescence field, with simultaneous, vertically aimed sampling made with the aid of a 5l water bottle and plankton nets. The bioluminescence field has a two-maxima structure with a more pronounced and permanent lower maximum found in the oligotrophic regions as deep as 60 to 100 m. In the narrow (10 m) layer of maximum bioluminescence, the concentration of zooplankton, as well as the concentration, activity and production of bacteria and phytoplankton, are several times higher than those in immediately adjacent waters at greater or lesser depth. At the same time, the concentration of nutrient salts in that layer diminishes sharply and approaches zero in the overlying water. Analysis of the data obtained shows that the production processes above the lower maximum layer are dependent not only on the turbulent influx of nutrient salts from the underlying layers, but also on the horizontal supply from the zone of upwelling. A pelagic community, in its different time aspects from the moment of water ascending until its sinking in the convergence zone, is suggested as a common system for modelling. В© 1970 Springer-Verlag.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kratasyuk V.A., Esimbekova E.N., Gladyshev M.I., Khromichek E.B., Kuznetsov A.M., Ivanova E.A.
Заглавие : The use of bioluminescent biotests for study of natural and laboratory aquatic ecosystems
Место публикации : Chemosphere. - 2001. - Vol. 42, Is. 8. - С. 909-915. - ISSN 00456535 (ISSN) , DOI 10.1016/S0045-6535(00)00177-6
Ключевые слова (''Своб.индексиров.''): alcohol dehydrogenase--bacterial luciferase--bioluminescence--blooming--pollution--trypsin--water toxicity--alcohol dehydrogenase--benzoquinone--luciferase--trypsin--aquatic ecosystem--bioluminescence--water quality--article--bacterium culture--bioluminescence--blue green alga--ecosystem--pond--seasonal variation--water pollution--water quality--benzoquinones--biological assay--cyanobacteria--ecosystem--environmental monitoring--eutrophication--fmn reductase--indicators and reagents--luminescent measurements--nadh, nadph oxidoreductases--water pollutants--russian federation--algae--bacteria (microorganisms)--chlorophyta--cyanobacteria--uncultured cyanobacterium
Аннотация: A set of bioluminescent tests was developed to monitor water quality in natural and laboratory ecosystems. It consisted of four bioluminescent systems: luminous bacteria, coupled enzyme system NADH:FMN-oxidoreductase-luciferase and triplet enzyme systems with alcohol dehydrogenase and trypsin. The set of biotests was applied for a small forest pond (Siberia, Russia), laboratory microecosystems polluted with benzoquinone and a batch culture of blue-green algae. Thereby effects of natural water compared to those of models of heavy pollution and "bloom" of blue-greens on the bioluminescent tests were revealed. The set of biotests was not affected by a natural seasonal variability of water quality in the unpolluted pond, but responded to the heavy pollution and the "bloom" of blue-greens. The set of biotests could be recommended as the alarm test to control the acute toxicity of natural water bodies. В© 2001 Elsevier Science Ltd.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : DEGERMENDZHI A.G., KOSOLAPOVA L.G.
Заглавие : THE THEORY OF EFFECT OF POLLUTANT AUTOSTABILIZATION AT RIVER ECOSYSTEM
Место публикации : Dokl. Akad. Nauk: MEZHDUNARODNAYA KNIGA, 1993. - Vol. 329, Is. 5. - С. 674-676. - 3. - ISSN 0869-5652
Примечания : Cited References: 9
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tirranen L.S., Gitelson I.I.
Заглавие : The role of volatile metabolites in microbial communities of the LSS higher plant link
Место публикации : Advances in Space Research. - 2006. - Vol. 38, Is. 6. - С. 1227-1232. - ISSN 02731177 (ISSN) , DOI 10.1016/j.asr.2006.02.038
Ключевые слова (''Своб.индексиров.''): inhibiting, bactericidal, stimulating effect--microbial interaction--type of interaction--volatile and non-volatile metabolites--growth kinetics--microbiology--microorganisms--plants (botany)--sensitivity analysis--toxic materials--inhibiting, bactericidal, stimulating effect--microbial interaction--type of interaction--volatile and non-volatile metabolites--metabolites
Аннотация: The paper addresses the possibility of controlling the microbial community composition through metabolites produced by microbes. The comparative analysis of experimental data has shown that volatile metabolites make a much greater contribution to the microbial interactions than nonvolatile ones. It has been found that interaction of microorganisms via the volatiles they release occurs frequently and is typical of a number of microorganisms. Volatile metabolites released by microorganisms produce an inhibitory, sometimes bactericidal, effect on the vital functions of bacteria. The stimulating action occurs 6-8 times less frequently. The range of action on the growth of the test cultures and the range of sensitivity to the effect of volatile metabolites of the study microbes have been found to be individual. Comparative cluster analysis of the ranges of action of 100 study cultures has shown that in the investigated set of microorganism species interaction was performed via a set of volatiles of an inhibiting action (82) and of a stimulating action (52). It has been found that release of volatile metabolites by the studied microorganisms depends upon the culture age, concentrations of components of the nutrient medium, and volatile by-products released by other microorganisms. This production can be increased or decreased by the action of volatile metabolites of other microbes. This is related to strain features and culture age. The prospects of using these regulating metabolites depend on the "range", specificity and safety for other members of the microbial community in insufficient concentrations. Volatiles produced by plants and microorganisms as well as by other components of the system - humans and processing equipment installed inside the closed ecosystem - could influence the formation not only of the microbial community but also of the gas composition of the system's atmosphere, through which they could affect the state of the plants. Specially performed experiments have shown that volatile metabolites of microorganisms can accumulate in their habitat, dissolve in the atmospheric water, and maintain their biological activity for days. It has been determined that volatile metabolites of some microorganisms are toxic for plants. Growth of seedling roots is inhibited more than growth of stems. В© 2006 COSPAR.
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16.

Вид документа : Статья из сборника (выпуск монографической серии)
Шифр издания :
Автор(ы) : Zadereev, Egor, Lopatina, Tatiana S.
Заглавие : The Role of Chemical Interactions in Embryonic Diapause Induction in Zooplankton
Колич.характеристики :11 с
Место публикации : Monogr. Biol.: SPRINGER INTERNATIONAL PUBLISHING AG, 2019. - Vol. 92. - С. 175-185. - (Monographiae Biologicae). - , DOI 10.1007/978-3-030-21213-1_10
Примечания : Cited References:60
Предметные рубрики: MOINA-MACROCOPA CLADOCERA
PREDATOR-INDUCED DIAPAUSE
SEXUAL
Аннотация: Production of resting eggs in zooplankton is controlled by multiple stimuli. In this chapter, we briefly discussed published data that confirm the effect of infochemicals produced by conspecifics, competitors, predators or preys on the production of resting eggs in zooplankton. We found that the effect of conspecific chemicals on the production of resting eggs is the most convincing. Both experimental data and theoretical research demonstrated that this density-dependent reaction often results in a competitive advantage of individuals in the population that follows such a strategy. The data on the effect of chemicals exuded by competitors or predators are controversial. Data on the effect of chemical interaction on the production of resting eggs in natural habitats are almost absent. Most of the studies of chemical interactions are performed with individuals in laboratory experiments with crowded water. Crowded water is water that contains chemicals exuded by the population. Even though this method has the number of drawbacks, it is still widely used in similar studies. There are several studies focused on the identification of the chemical nature of cues responsible for the production of resting eggs in zooplankton. Most probably, chemicals involved are short proteins. However, the exact identification of the chemicals responsible for the production of resting eggs in zooplankton remains an open task. In order to place chemical interactions into a framework of multiple diapause control theory, it is necessary to determine the nature of chemicals involved and to demonstrate population- and ecosystem-level consequences of this phenomenon in natural habitats.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Kolmakov V.I., Dubovskaya O.P., Ivanova E.A.
Заглавие : The microalgal food spectrum of Daphnia longispina during the algal bloom of an eutrophic water body.
Место публикации : Doklady Biological Sciences. - 2000. - Vol. 371, Is. 1-6. - С. 179-181. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): alga--animal--article--biomass--daphnia--ecosystem--food chain--growth, development and aging--microbiology--plankton--zooplankton--algae--animals--biomass--daphnia--ecosystem--food chain--plankton--water microbiology--zooplankton
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tikhomirov A.A., Lisovskii G.M.
Заглавие : The levels of organization of the photosynthetic apparatus and the control of production processes in phytocenoses under artificial-light culture
Колич.характеристики :5 с
Место публикации : Russ. J. Plant Physiol.: MAIK NAUKA/INTERPERIODICA, 2001. - Vol. 48, Is. 3. - P395-399. - ISSN 1021-4437, DOI 10.1023/A:1016682904411
Примечания : Cited References: 21
Ключевые слова (''Своб.индексиров.''): photosynthetic apparatus--phytocenosis--productivity--artificial-light culture
Аннотация: The processes limiting the production in higher plant phytocenoses under an artificial-light culture are analyzed in relation to the multilevel organization of the photosynthetic apparatus (PA). The authors consider the feasibility of overcoming these limitations by optimizing the physical parameters of irradiation (the structure of the light spectrum, the rate, and the ratio of radiation fluxes in photosynthetically active radiation (PAR) and infrared (IR) regions) at the molecular, leaf, plant, and cenotic levels of PA organization. To illustrate this approach, the authors used a complex experiment in an artificial ecosystem to evaluate the efficiency of the light control of production processes in multispecies phytocenoses by alleviating or removing the factors that limit plant production at the various levels of PA organization. An artificial-light culture is seen as an instrument for solving several problems of theoretical and applied plant physiology and related disciplines in the future.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tikhomirov A.A., Lisovskii G.M.
Заглавие : The levels of organization of the photosynthetic apparatus and the control of production processes in phytocenoses under artificial-light culture
Место публикации : Russian Journal of Plant Physiology. - 2001. - Vol. 48, Is. 3. - С. 395-399. - ISSN 10214437 (ISSN) , DOI 10.1023/A:1016682904411
Ключевые слова (''Своб.индексиров.''): artificial-light culture--photosynthetic apparatus--phytocenosis--productivity--embryophyta
Аннотация: The processes limiting the production in higher plant phytocenoses under an artificial-light culture are analyzed in relation to the multilevel organization of the photosynthetic apparatus (PA). The authors consider the feasibility of overcoming these limitations by optimizing the physical parameters of irradiation (the structure of the light spectrum, the rate, and the ratio of radiation fluxes in photosynthetically active radiation (PAR) and infrared (IR) regions) at the molecular, leaf, plant, and cenotic levels of PA organization. To illustrate this approach, the authors used a complex experiment in an artificial ecosystem to evaluate the efficiency of the light control of production processes in multispecies phytocenoses by alleviating or removing the factors that limit plant production at the various levels of PA organization. An artificial-light culture is seen as an instrument for solving several problems of theoretical and applied plant physiology and related disciplines in the future.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhutova O.N., Sushchik N.N., Kalacheva G.S.
Заглавие : The information value of fatty acid composition of triacylglycerols and polar lipids of seston in assaying the food spectrum of microzooplankton in the bugach reservoir.
Место публикации : Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections / translated from Russian. - 2004. - Vol. 395. - С. 143-145. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): fatty acid--fresh water--lipid--triacylglycerol--article--bacterium--biomass--chemistry--cyanobacterium--diatom--ecosystem--metabolism--physiology--phytoplankton--russian federation--season--bacteria--biomass--cyanobacteria--diatoms--ecosystem--fatty acids--fresh water--lipids--phytoplankton--russia--seasons--triglycerides
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