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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tang K.W., Gladyshev M.I., Dubovskaya O.P., Kirillin G..., Grossart H.P.
Заглавие : Zooplankton carcasses and non-predatory mortality in freshwater and inland sea environments
Колич.характеристики :16 с
Коллективы : Humboldt Foundation; Ministry of Education and Science of Russian Federation (Siberian Federal University) [B-15]; Leibniz-Association [SAW-2011-IGB-2]; German Science foundation [KI-853/7-1, GR1540/20-1]
Место публикации : J. Plankton Res.: OXFORD UNIV PRESS, 2014. - Vol. 36, Is. 3. - С. 597-612. - ISSN 0142-7873, DOI 10.1093/plankt/fbu014. - ISSN 1464-3774
Примечания : Cited References: 168. - This work was supported by the Humboldt Foundation (Fellowship for Experienced Researchers to K. W. T.); Siberian Branch of Russian Academy of Science (Partner Project No. 8 to M. I. G. and O.P.D.); Federal Tasks of Ministry of Education and Science of Russian Federation (project B-15 of Siberian Federal University to M. I. G.); the Leibniz-Association (SAW-2011-IGB-2 to G. K.); and the German Science foundation (KI-853/7-1 to G. K., GR1540/20-1 to H. P. G.). The manuscript benefited from the constructive comments from three reviewers.
Предметные рубрики: SMALL-SCALE TURBULENCE
NON-CALANOID COPEPODS
AGGREGATES LAKE SNOW
DAPHNIA-GALEATA
MIDSUMMER DECLINE
NONCONSUMPTIVE MORTALITY
CRUSTACEAN ZOOPLANKTON
CLIMATE-CHANGE
VERTICAL-DISTRIBUTION
POPULATION-GROWTH
Ключевые слова (''Своб.индексиров.''): carbon flux--inland waters--lakes--live--dead sorting--non-predatory mortality--zooplankton carcasses
Аннотация: Zooplankton carcasses are ubiquitous in marine and freshwater systems, implicating the importance of non-predatory mortality, but both are often overlooked in ecological studies compared with predatory mortality. The development of several microscopic methods allows the distinction between live and dead zooplankton in field samples, and the reported percentages of dead zooplankton average 11.6 (minimum) to 59.8 (maximum) in marine environments, and 7.4 (minimum) to 47.6 (maximum) in fresh and inland waters. Common causes of non-predatory mortality among zooplankton include senescence, temperature change, physical and chemical stresses, parasitism and food-related factors. Carcasses resulting from non-predatory mortality may undergo decomposition leading to an increase in microbial production and a shift in microbial composition in the water column. Alternatively, sinking carcasses may contribute significantly to vertical carbon flux especially outside the phytoplankton growth seasons, and become a food source for the benthos. Global climate change is already altering freshwater ecosystems on multiple levels, and likely will have significant positive or negative effects on zooplankton non-predatory mortality. Better spatial and temporal studies of zooplankton carcasses and non-predatory mortality rates will improve our understanding of this important but under-appreciated topic.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sid'ko A.F., Pugacheva I.Yu., Shevyrnogov A.P.
Заглавие : Time course of the spectral brightness of agricultural crops during the vegetation period in Krasnoyarsk krai
Место публикации : Doklady Biological Sciences. - 2008. - Vol. 419, Is. 1. - С. 114-117. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496608020130
Ключевые слова (''Своб.индексиров.''): article--crop--histology--light--metabolism--plant--russian federation--season--spectroscopy--crops, agricultural--light--plants--russia--seasons--spectrum analysis
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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O.P., Gladyshev M.I., Gubanov V.G., Makhutova O.N.
Заглавие : Study of non-consumptive mortality of Crustacean zooplankton in a Siberian reservoir using staining for live/dead sorting and sediment traps
Место публикации : Hydrobiologia. - 2003. - Vol. 504. - С. 223-227. - ISSN 00188158 (ISSN) , DOI 10.1023/B:HYDR.0000008522.88010.45
Ключевые слова (''Своб.индексиров.''): cyclops vicinus--daphnia--live/dead sorting--non-consumptive mortality--sedimentation--reservoirs (water)--sampling--sediment traps--non-consumptive mortality--population dynamics--biodiversity--mortality--population dynamics--reservoir--sediment trap--sedimentation--zooplankton--cladocera--copepoda--crustacea--cyclopia--cyclops--cyclops vicinus--daphnia
Аннотация: We studied non-consumptive (non-predatory) mortality of Daphnia and Cyclops vicinus during four sampling seasons. Mortality estimations were based on live/dead sorting using special staining and measurements of sedimentation rates for dead individuals, depended on wind speed. Original equations were used for calculations. The estimated specific non-consumptive mortality never had biologically senseless negative values, which were often obtained on the basis of the other ways of mortality estimations, and was in a good agreement with other components of population dynamics. As found, the non-consumptive mortality was the important, often the determinant component of the zooplankton population dynamics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O.P., Gladyshev M.I., Gubanov V.G., Makhutova O.N.
Заглавие : Study of non-consumptive mortality of Crustacean zooplankton in a Siberian reservoir using staining for live/dead sorting and sediment traps
Колич.характеристики :5 с
Место публикации : Hydrobiologia: KLUWER ACADEMIC PUBL, 2003. - Vol. 504: 4th International Conference on Reservoir Limnology and Water Quality (AUG, 2002, CESKE BUDEJOVICE, CZECH REPUBLIC), Is. 01.03.2013. - P223-227. - ISSN 0018-8158, DOI 10.1023/B:HYDR.0000008522.88010.45
Примечания : Cited References: 19
Предметные рубрики: SEASONAL DYNAMICS
MIDSUMMER DECLINE
DAPHNIA
DETRITUS
FISH
POND
Ключевые слова (''Своб.индексиров.''): cyclops vicinus--daphnia--live/dead sorting--non-consumptive mortality--sedimentation
Аннотация: We studied non-consumptive (non-predatory) mortality of Daphnia and Cyclops vicinus during four sampling seasons. Mortality estimations were based on live/dead sorting using special staining and measurements of sedimentation rates for dead individuals, depended on wind speed. Original equations were used for calculations. The estimated specific non-consumptive mortality never had biologically senseless negative values, which were often obtained on the basis of the other ways of mortality estimations, and was in a good agreement with other components of population dynamics. As found, the non-consumptive mortality was the important, often the determinant component of the zooplankton population dynamics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Buseva, Zhanna F., Farahani, Shabnam Bahman Gazerani, Veras, Yulia K., Kolmakova, Anzhelika A., Sushchik, Nadezhda N.
Заглавие : STOICHIOMETRIC COMPOSITION OF SESTON IN LITTORAL AND PELAGIAL ZONES OF SHALLOW LAKE OBSTERNO (BELARUS)
Колич.характеристики :7 с
Коллективы : BRFFR [17-037]
Место публикации : Dokl. Nat. Akad. Nauk Belarusi: BELARUSKAYA NAVUKA, 2018. - Vol. 62, Is. 3. - С. 304-310. - ISSN 1561-8323, DOI 10.29235/1561-8323-2018-62-3-304-310. - ISSN 2524-2431(eISSN)
Примечания : Cited References:15. - This work was partially supported by the BRFFR (grant No. (sic)17-037). We thank for the collaboration with Narach Biological Station of Belarusian State University and thank it's Director Dr. T. V. Zhukova, scientific and technological staff -E. I. Lapitskaja and E. A. Zhuravliova for their fruitfull help.
Предметные рубрики: NUTRIENT LIMITATION
PHOSPHORUS
NITROGEN
ZOOPLANKTON
CARBON
MARINE
Ключевые слова (''Своб.индексиров.''): seston--carbon--nitrogen--phosphorus--stoichiometry--littoral--pelagial--macrophyte beds
Аннотация: We estimated the seston elemental composition (C, N, P) and its ratio in pelagic and littoral zones of mesotrophic shallow Lake Obsterno during two contrasting seasons, as well as the influence of macrophyte beds on the seston stoichiometry. In the both pelagial and littoral zones in summer the C : N ratio was small, 4.62 and 7.05 respectively. But it increased slightly during autumn to 5.66 in pelagic samples against 8.33 in littoral ones. The large N : P ratio and the small phosphorus content specially in the macrophyte covered littoral zone equal to 57.7 in July against 22.47 in September suggest a high level of phosphorus limitation in the littoral locations as a possible mediated reason suppressing zooplankton abundance in summer. Our results in the both pelagial and littoral habitat showed a highly P limited situation in which the N : P ratio was larger in littoral with macrophyte than in pelagial zones. The obtained data of littoral seston stoichiometry were recorded for the first time and exceeded the classical Redfield ratio. The elemental imbalance between macrophyte covered littoral and pelagial suggest that nutrients, especially P, are more limiting in macrophyte beds in summer due to the resource competition between phytoplankton and macrophytes for nutrients, a poor food quality, low zooplankton abundance, as well as its poor taxon-specific elemental ratio in summer.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trusova M.Y., Gladyshev M.I.
Заглавие : Species composition of winter bacterioplankton in two Siberian ponds determined by the 16s rRNA sequence analysis.
Место публикации : Doklady Biological Sciences. - 2002. - Vol. 382. - С. 51-54. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): bacterial rna--rna 16s--animal--article--bacterium--classification--ecosystem--genetics--microbiology--molecular cloning--molecular genetics--plankton--russian federation--season--species difference--animals--bacteria--cloning, molecular--ecosystem--molecular sequence data--plankton--rna, bacterial--rna, ribosomal, 16s--seasons--siberia--species specificity--water microbiology
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trusova M.Yu., Gladyshev M.I.
Заглавие : Species composition of winter bacterioplankton in blooming and nonblooming reservoirs as determined by 16S rRNA sequences
Место публикации : Doklady Biological Sciences. - 2005. - Vol. 405, Is. 1-6. - С. 443-445. - ISSN 00124966 (ISSN) , DOI 10.1007/s10630-005-0160-4
Ключевые слова (''Своб.индексиров.''): fresh water--rna 16s--article--bacterium--classification--genetic variability--genetics--isolation and purification--microbiology--molecular genetics--phylogeny--plankton--russian federation--season--species difference--bacteria--fresh water--molecular sequence data--phylogeny--plankton--rna, ribosomal, 16s--seasons--siberia--species specificity--variation (genetics)--water microbiology
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chan, Ya-Fan, Chiang, Pei-Wen, Tandon, Kshitij, Rogozin, Denis, Degermendzhi, Andrey, Zykov, Vladimir, Tang, Sen-Lin
Заглавие : Spatiotemporal Changes in the Bacterial Community of the Meromictic Lake Uchum, Siberia
Колич.характеристики :13 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-05-00428]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science (project: "Bottom sediments of Lake Uchum (Krasnoyarsky kray) as a source of information for the reconstruction of the paleo-climate and the prediction of the healing properties of the lake") [18-45-243002]; Ministry of Science and Technology, TaiwanMinistry of Science and Technology, Taiwan [105-2923-B-001-001-MY3, 108-2811-M-001-603]
Место публикации : Microb. Ecol.: SPRINGER, 2020. - Article in press. - ISSN 0095-3628, DOI 10.1007/s00248-020-01592-9. - ISSN 1432-184X(eISSN)
Примечания : Cited References:77. - This work was supported by the Russian Foundation for Basic Research (grant no. 19-05-00428) and the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science (project: "Bottom sediments of Lake Uchum (Krasnoyarsky kray) as a source of information for the reconstruction of the paleo-climate and the prediction of the healing properties of the lake", grant no. 18-45-243002) and the Ministry of Science and Technology, Taiwan (project: "Transition in microbial community of stratified lakes in arid zone of South Siberia: Current and Past," grant no. 105-2923-B-001-001-MY3 and project: "Postdoctoral Research Fellows", grant no. 108-2811-M-001-603).
Предметные рубрики: PHOTOTROPHIC SULFUR BACTERIA
SP NOV.
MICROBIAL COMMUNITIES
Аннотация: Lake Uchum is a newly defined meromictic lake in Siberia with clear seasonal changes in its mixolimnion. This study characterized the temporal dynamics and vertical profile of bacterial communities in oxic and anoxic zones of the lake across all four seasons: October (autumn), March (winter), May (spring), and August (summer). Bacterial richness and diversity in the anoxic zone varied widely between time points.Proteobacteriawas the dominant bacterial phylum throughout the oxic and anoxic zones across all four seasons.Alphaproteobacteria(Loktanella) andGammaproteobacteria(Aliidiomarina) exhibited the highest abundance in the oxic and anoxic zone, respectively. Furthermore, there was a successional shift in sulfate-reducing bacteria (SRB) and sulfur-oxidizing bacteria in the anoxic zone across the seasons. The most dominant SRB,Desulfonatronovibriosp., is likely one of the main producers of hydrogen sulfide (H2S) and typically accumulates the most H2S in winter. The representative anoxygenic phototrophic bacterial group in Lake Uchum was purple sulfur bacteria (PSB). PSB were dominant (60.76%) in summer, but only had 0.2-1.5% relative abundance from autumn to spring. Multivariate analysis revealed that the abundance of these SRB and PSB correlated to the concentration of H2S in Lake Uchum. Taken together, this study provides insights into the relationships between changes in bacterial community and environmental features in Lake Uchum.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Makhutova O.N., Kravchuk E.S., Dubovskaya O.P., Kalacheva G.S.
Заглавие : Seasonal transfer of the pool of the essential eicosapentaenoic acid along the pelagic trophic chain of a eutrophic reservoir
Место публикации : Doklady Biological Sciences. - 2008. - Vol. 422, Is. 1. - С. 355-356. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496608050232
Ключевые слова (''Своб.индексиров.''): fresh water--icosapentaenoic acid--article--biomass--metabolism--microbiology--phytoplankton--population density--river--russian federation--season--biomass--eicosapentaenoic acid--fresh water--phytoplankton--population density--rivers--russia--seasons--water microbiology
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Makhutova O.N., Pryanichnikova E.G., Gladyshev M.I., Sushchik N.N.
Заглавие : Seasonal dynamics of the nutrition spectrum of Dreissena polymorpha in the Rybinsk Reservoir.
Место публикации : Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections / translated from Russian. - 2008. - Vol. 423. - С. 453-456. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496608060252
Ключевые слова (''Своб.индексиров.''): fresh water--animal--animal food--article--dreissena--metabolism--physiology--russian federation--season--animal nutritional physiological phenomena--animals--dreissena--fresh water--russia--seasons
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kravchuk E.S., Ivanova E.A., Gladyshev M.I.
Заглавие : Seasonal dynamics of the numbers of Anabaena flos-aquae (Lyngb.) Breb. akinetes in the surface layer of bottom sediments and bulk water.
Место публикации : Doklady Biological Sciences. - 2002. - Vol. 384. - С. 233-234. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): fresh water--anabaena--article--microbiology--physiology--season--sediment--anabaena--fresh water--geologic sediments--seasons--water microbiology
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kalacheva G.S., Sushchik N.N., Gladyshev M.I., Makhutova O.N.
Заглавие : Seasonal dynamics of fatty acids in the lipids of water moss Fontinalis antipyretica from the Yenisei River
Место публикации : Russian Journal of Plant Physiology. - 2009. - Vol. 56, Is. 6. - С. 795-807. - ISSN 10214437 (ISSN) , DOI 10.1134/S1021443709060090
Ключевые слова (''Своб.индексиров.''): acetylenic acids--fatty acids--fontinalis antipyretica--seasonal dynamics--bryophyta--fontinalis antipyretica
Аннотация: Identification of lipid fatty acids (FA) and studying of their seasonal dynamics in water moss Fontinalis antipyretica from the Yenisei River were carried out by means of gas chromatography-mass spectrometry. FA composition of water moss was notable for a relatively low level of saturated acids and predominance of polyunsaturated acids (PUFA) with double bonds (accounting for more than 30% of total FA) and polyunsaturated acids with double and triple bonds (acetylenic acids, accounting for more than 40% of total FA). Among PUFA, ?- and ?-linolenic (18:3?3 and 18:3?6), arachidonic (20:4?6), and eicosapentaenoic (20:5?3) acids prevailed. Relative content of PUFA from ?3-family was the greatest in spring, and the level of PUFA from ?6-group was essentially the same throughout all the seasons. In the biomass of water moss, we identified seven acetylenic acids; among them octadeca-9,12-dien-6-ynoic (6a,9,12-18:3), octadeca-9,12,15-trien-6-ynoic (6a,9,12,15-18:4), and eicosa-11,14-dien-8-ynoic (8a,11,14-20:3) acids were predominant. For the first time, in the lipids of water moss we identified an acetylenic eicosa-11,14,17-trien-8-ynoic acid (8a,11,14,15-20:4). Relative content of acetylenic acids in the total FA was great throughout the entire period of investigation with the peak accumulation in summer. Owing to a steadily high level in the biomass of water moss and the lack of other producers of these acids in the ecosystem, acetylenic FA are highly specific biochemical markers useful for the investigation of trophic interactions between higher aquatic plants and zoobenthos. В© Pleiades Publishing, Ltd., 2009.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Kalachova G.S.
Заглавие : Seasonal dynamics of fatty acid content of a common food fish from the Yenisei river, Siberian grayling, Thymallus arcticus
Место публикации : Food Chemistry. - 2007. - Vol. 104, Is. 4. - С. 1353-1358. - ISSN 03088146 (ISSN) , DOI 10.1016/j.foodchem.2007.01.050
Ключевые слова (''Своб.индексиров.''): essential polyunsaturated fatty acids--grayling--seasonal dynamics--docosahexaenoic acid--fatty acid--icosapentaenoic acid--polyunsaturated fatty acid--article--bioaccumulation--molecular dynamics--muscle--quantitative analysis--russian federation--water temperature--thymallus arcticus
Аннотация: Seasonal variations of fatty acid contents in muscle tissue of one of the main food fish species in Siberian rivers, grayling, Thymallus arcticus, were studied over 3 years. Under a comparatively low range of water temperature variations, spawning appeared to be the main cause of seasonal changes in contents of quantitatively prominent and essential fatty acids in fish filets. In general, fish accumulated essential polyunsaturated fatty acids (PUFA), such as eicosapentaenoic (EPA) and docosahexaenoic (DHA), in their muscle tissue before reproductive seasons and then the PUFA seemed to be transferred into gonads during their formation. Hard roe of Siberian grayling had 3-4 times higher PUFA contents, than had that of the muscle tissue. The fish species, T. arcticus, was found to be a valuable source of the essential PUFA, including EPA and DHA, for human diet. В© 2007 Elsevier Ltd. All rights reserved.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Kravchuk E.S., Ivanova E.A., Ageev A.V., Kalacheva G.S.
Заглавие : Seasonal changes in the standing stock of essential polyunsaturated fatty acids in the biomass of phyto- and zoobenthos on a littoral station of the Yenisei River
Место публикации : Doklady Biological Sciences. - 2005. - Vol. 403, Is. 1-6. - С. 267-268. - ISSN 00124966 (ISSN) , DOI 10.1007/s10630-005-0107-9
Ключевые слова (''Своб.индексиров.''): essential fatty acid--animal--article--lipid metabolism--metabolism--physiology--phytoplankton--river--russian federation--season--zooplankton--animals--fatty acids, essential--lipid metabolism--phytoplankton--rivers--seasons--siberia--zooplankton
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Anishchenko O.V., Komakov V.I., Gladyshev M.I.
Заглавие : Research of the meteorological factors influence on the fluorescence measurements of subsurface phytoplankton in blooming reservoir
Место публикации : Doklady Akademii Nauk. - 2004. - Vol. 397, Is. 1. - С. 124-127. - ISSN 08695652 (ISSN)
Ключевые слова (''Своб.индексиров.''): bacteria--fluorescence--meteorological problems--precipitation (meteorology)--reservoirs (water)--solar radiation--wind effects--meteorological effects--algae
Аннотация: The reaction of algae and cyano-bacteria photosynthetic apparatus on atmospheric sediments, incident solar radiation and wind velocity was estimated by measuring chlorophyll fluorescence using three-beam fluorescent diagnostics. As shown, wind in the spring positively affects the chlorophyll concentration but causes negative effect on phytoplankton photosynthetic activity in other seasons. Under conditions of high-intensity solar irradiation confervoid and colonial cyanobacteria, possessing gas vacuoles, have an advantage over plankton eukaryotic algae. Other response differences weren't observed.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A.P., Vysotskaya G.S., Gitelson J.I.
Заглавие : Quasistationary areas of chlorophyll concentration in the world ocean as observed satellite data
Место публикации : Advances in Space Research. - 1996. - Vol. 18, Is. 7. - С. 129-132. - ISSN 02731177 (ISSN) , DOI 10.1016/0273-1177(95)00955-8
Ключевые слова (''Своб.индексиров.''): chlorophyll concentration--chlorophylls--czcs--ocean chlorophyll concentration--phytopigment dynamics--productivity--quasistationary areas--remote sensing--satellite data--seasonal changes--world ocean
Аннотация: To estimate the seasonal progress of the production process over the planet and its long-standing trend it is important to measure not only the spatial distributions of pigment that represent the rates of photosynthesis but also their time variability. Anthropogenic impact on natural complexes can be efficiently estimated by satellite observations of phytopigment dynamics. This study presents CZCS satellite data processed to reveal spatial inhomogeneity in the seasonal course of chlorophyll concentration in the world ocean on a global scale. Areas with quasistationary and non-stationary seasonal changes in chlorophyll concentration are revealed for the 7.5 years period of CZCS operation. Areas in the world ocean with maximum absolute and relative differences in chlorophyll concentration during different seasons were found. Results are illustrated with a chart of areas in the Atlantic Ocean discerned by dynamic parameters.
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18.

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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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belolipetskii, Victor M., Genova, Svetlana N., Degermendzhy, Andrey G., Zykov, Vladimir V., Rogozin, Denis Yu
Заглавие : One-dimensional Model for Studying Seasonal Changes of Vertical Structure of Salt Lake Uchum
Колич.характеристики :9 с
Коллективы : RFBR [16-05-00091]; Russian Foundation for Basic Research; government of the region of the Russian Federation [18-45-243002]
Место публикации : J. Sib. Fed. Univ.-Math. Phys.: SIBERIAN FEDERAL UNIV, 2019. - Vol. 12, Is. 1. - С. 100-108. - ISSN 1997-1397, DOI 10.17516/1997-1397-2019-12-1-100-108. - ISSN 2313-6022(eISSN)
Примечания : Cited References:19. - The work was supported by the RFBR grants (16-05-00091) and Russian Foundation for Basic Research and the government of the region of the Russian Federation, grant 18-45-243002.
Предметные рубрики: CIRCULATION
Ключевые слова (''Своб.индексиров.''): salt lake--one-dimensioanal vertical model--temperature and salinity--profiles of water
Аннотация: Many salt lakes are meromictic, in which the water column is not mixed to the bottom for at least one year. In the stratified lake, the upper (epilimnion) and deep (hypolimnion) layers are distinguished, in which the density gradients are small. Between them is a layer of water (metalimnion), within which the density gradient is great. In the near-bottom layer, hydrogen sulphide accumulates and there is no oxygen. One-dimensional mathematical models are used to determine the dynamics of the vertical thermohaline structure of the salt lake Uchum. Two periods in the annual regime are considered: the period of the absence of the ice cover (IC) and the period with the existence of the IC. The vertical distributions of temperature and water salinity in Lake Uchum have been calculated in different seasons. The results of the calculations are consistent with the data of field measurements.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lobova T.I., Barkhatov Y.V., Salamatina O.V., Popova L.Yu.
Заглавие : Multiple antibiotic resistance of heterotrophic bacteria in the littoral zone of Lake Shira as an indicator of human impact on the ecosystem
Место публикации : Microbiological Research. - 2008. - Vol. 163, Is. 2. - С. 152-160. - ISSN 09445013 (ISSN) , DOI 10.1016/j.micres.2006.03.014
Ключевые слова (''Своб.индексиров.''): antibiotic resistance--aquatic ecosystems--heterotrophic bacteria--human impact--monitoring--antibiotics--bacteria--ecosystems--environmental impact--mammals--antibiotic resistance--aquatic ecosystems--heterotrophic bacteria--materials--antiinfective agent--fresh water--allochthony--anthropogenic effect--antibiotic resistance--bacterium--concentration (composition)--heterotrophy--intertidal environment--monitoring--recreational facility--spring (season)--summer--animal--article--bacterial count--bacterium--drug effect--ecosystem--environmental monitoring--heterotrophy--human--isolation and purification--methodology--microbiological examination--microbiology--multidrug resistance--russian federation--season--animals--anti-bacterial agents--bacteria--colony count, microbial--drug resistance, multiple, bacterial--ecosystem--environmental monitoring--fresh water--heterotrophic processes--humans--microbial sensitivity tests--russia--seasons--eurasia--khakassia--lake shira--russian federation--animalia--bacteria (microorganisms)
Аннотация: Resistance to Ampicillin and Kanamycin displayed by heterotrophic bacteria isolated in Summer and in Spring from the littoral and the central parts of Lake Shira (a therapeutic lake in the Khakasia Republic, Russia) has been investigated. It has been found that in Summer, human and animal microflora featuring multiple antibiotic resistance (to Ampicillin and Kanamycin) predominates in all the studied stations of the littoral zone of the lake. In Spring, concentrations of bacteria featuring multiple antibiotic resistance decrease significantly and bacteria sensitive to antibiotics predominate in the lake. Emergence of multiple antibiotic resistance in bacteria of Lake Shira is caused by the input of allochthonous bacteria into the lake; this feature of heterotrophic bacteria of Lake Shira can be used to monitor the impact on the ecosystem made by health resorts. В© 2006 Elsevier GmbH. All rights reserved.
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