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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chernetskiy M., Pasko I., Shevyrnogov A., Slyusar N., Khodyayev A.
Заглавие : A study of forest vegetation dynamics in the south of the Krasnoyarskii Krai in spring
Место публикации : Advances in Space Research. - 2011. - Vol. 48, Is. 5. - С. 819-825. - ISSN 02731177 (ISSN) , DOI 10.1016/j.asr.2011.04.032
Ключевые слова (''Своб.индексиров.''): evi--forestry--modis--ndvi--remote sensing--vegetation phenology--accurate measurement--annual time series--carbon exchange--data series--dynamic state--enhanced vegetation index--evi--forest vegetation--global scale--growth dynamics--interannual variability--moderate resolution imaging spectroradiometer--modis--ndvi--normalized difference vegetation index--principal components analysis--remote sensing applications--remote sensing data--satellite data--spatial structure--spring season--terrestrial ecosystems--vegetation dynamics--vegetation phenology--biology--climate models--dynamics--ecosystems--estimation--forestry--monitoring--principal component analysis--radiometers--remote sensing--satellite imagery--timber--time series--user interfaces--vegetation--carbon--ecosystems--forests--image analysis--plants--remote sensing--time series analysis
Аннотация: Remote sensing applications have greatly enhanced ability to monitor and manage in the areas of forestry. Accurate measurements of regional and global scale vegetation dynamics (phenology) are required to improve models and understanding of inter-annual variability in terrestrial ecosystem carbon exchange and climate-biosphere interactions. Study of vegetation phenology is required for understanding of variability in ecosystem. In this paper, monitoring of vegetation dynamics using time series of satellite data is presented. Vegetation variability (vegetation rate) in different topoclimatic areas is investigated. Original software using IDL interactive language for processing of satellite long-term data series was developed. To investigate growth dynamics vegetation rate inferred from remote sensing was used. All estimations based on annual time series of Moderate Resolution Imaging Spectroradiometer (MODIS) imagery. Vegetation rate for Enhanced Vegetation Index (EVI) and Normalized Difference Vegetation Index (NDVI) was calculated using MODIS data. The time series covers spring seasons of each of 9 years, from 2000 to 2008. Comparison of EVI and NDVI derived growth rates has shown that NDVI derived rates reveal spatial structure better. Using long-term data of vegetation rates variance was estimated that helps to reveal areas with anomalous growth rate. Such estimation shows sensitivity degree of different areas to different topoclimatic conditions. Woods of heights depend on spatial topoclimatic variability unlike woods of lowlands. Principal components analysis shows vegetation with different rate conditions. Also it reveals vegetation of same type in areas with different conditions. It was demonstrated that using of methods for estimating the dynamic state of vegetation based on remote sensing data enables successful monitoring of vegetation phenology. В© 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Botvich I. Y., Shevyrnogov A. P.
Заглавие : A study of the phenological variability of terrestrial ecosystems in the south of the Krasnoyarsk Territory and Khakassia based on satellite data
Место публикации : Biophysics: Maik Nauka-Interperiodica Publishing, 2017. - Vol. 62, Is. 4. - С. 667-670. - ISSN 00063509 (ISSN) , DOI 10.1134/S0006350917040030
Ключевые слова (''Своб.индексиров.''): agricultural crops--phenology--satellite data--woody vegetation
Аннотация: The patterns of the phase portraits of vegetation (agrophytocenosis, woody vegetation) constructed using two-dimensional space radiation temperature values and Normalized Difference Vegetation Index were studied. An analysis of the phenological variability of vegetation in the south of the Krasnoyarsk Territory and the Republic of Khakassia during the growing seasons of 2003 and 2006 was carried out. Distinctive features of the phase portraits of agrophytocenosis and woody vegetation were revealed. The possibility of determining the boundaries of phenological states in the phytocenosis, and the transition range from one state into another was shown. Based on the complex analysis of the reflexive and radiative properties of the plant samples, an algorithm for calculating the start and end of the growing season was developed. © 2017, Pleiades Publishing, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rogozin D.Yu., Zykov V.V., Chernetskii M.Yu., Degermendzhy A.G.
Заглавие : Anoxygenic phototrophic bacteria in meromictic lakes of southern Siberia during the ice period: Spatial distributions and ecological conditions
Место публикации : Doklady Biological Sciences. - 2009. - Vol. 424, Is. 1. - С. 63-67. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496609010190
Ключевые слова (''Своб.индексиров.''): fresh water--anaerobic growth--article--environmental aspects and related phenomena--history--ice cover--microbiology--phototrophy--russian federation--season--anaerobiosis--ecological and environmental phenomena--fresh water--history, ancient--ice cover--phototrophic processes--seasons--siberia--photobacteria
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Makhutova O.N., Kalachova G.S., Kravchuk E.S., Ivanova E.A.
Заглавие : Associating particulate essential fatty acids of the ?3 family with phytoplankton species composition in a Siberian reservoir
Место публикации : Freshwater Biology. - 2004. - Vol. 49, Is. 9. - С. 1206-1219. - ISSN 00465070 (ISSN) , DOI 10.1111/j.1365-2427.2004.01263.x
Ключевые слова (''Своб.индексиров.''): cyanobacteria--diatoms--fatty acids--food quality--species composition--cyanobacterium--diatom--fatty acid--food quality--food web--growing season--phytoplankton--reservoir--eurasia--siberia--anabaena--anabaena flos-aquae--aphanizomenon--aphanizomenon flos-aquae--bacillariophyta--cyanobacteria--cyclotella--dinophyceae--flos--microcystis--microcystis aeruginosa--planktothrix--planktothrix agardhii--stephanodiscus
Аннотация: 1. We studied variation in the composition of fatty acids in the seston of a small freshwater reservoir with changes in phytoplankton composition during four growth seasons. We focused on the dynamics of the ?3 fatty acids because of their potential importance for zooplankton nutrition. 2. Total diatoms were related to the 20:5?3 fatty acid (eicosapentaenoic, EPA) content in seston. Among two dominant diatom genera, Cyclotella was not associated with EPA content. In contrast, there was a significant correlation between Stephanodiscus and the percentage contribution and content of EPA throughout the study. Hence, freshwater diatoms can differ strongly in content of the essential EPA. 3. We considered abundant cyanobacteria as a potential source of 18:3?3 fatty acid (linolenic, ALA) to aquatic food webs. Among four dominant cyanobacteria species, two (Anabaena flos-aquae and Planktothrix agardhii) showed significant correlation with the ALA content of the seston, while the other two (Aphanizomenon flos-aquae and Microcystis aeruginosa) did not. 4. Dinophyta had a relatively high level of 22:6?3 (docosahexaenoic, DHA) for freshwater species and can be also a source of EPA to aquatic food webs. 5. Our results show that various species of diatoms as well as cyanobacteria can be of contrasting nutritional value for zooplankton because of their different content of the essential PUFAs. Diatoms, which are low in EPA, could not be considered as a valuable food, while some field populations of cyanobacteria might be valuable sources of essential ALA.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Makhutova O.N., Kalachova G.S., Kravchuk E.S., Ivanova E.A.
Заглавие : Associating particulate essential fatty acids of the omega 3 family with phytoplankton species composition in a Siberian reservoir
Колич.характеристики :14 с
Место публикации : Freshw. Biol.: BLACKWELL PUBLISHING LTD, 2004. - Vol. 49, Is. 9. - P1206-1219. - ISSN 0046-5070, DOI 10.1111/j.1365-2427.2004.01263.x
Примечания : Cited References: 48
Предметные рубрики: ENCLOSED EXPERIMENTAL ECOSYSTEM
FOOD QUALITY
BENTHIC INVERTEBRATES
GREEN-ALGAE
CYANOBACTERIA
DAPHNIA
MICROALGAE
ZOOPLANKTON
LAKE
APHANIZOMENON
Ключевые слова (''Своб.индексиров.''): cyanobacteria--diatoms--fatty acids--food quality--species composition
Аннотация: 1. We studied variation in the composition of fatty acids in the seston of a small freshwater reservoir with changes in phytoplankton composition during four growth seasons. We focused on the dynamics of the omega3 fatty acids because of their potential importance for zooplankton nutrition. 2. Total diatoms were related to the 20:5omega3 fatty acid (eicosapentaenoic, EPA) content in seston. Among two dominant diatom genera, Cyclotella was not associated with EPA content. In contrast, there was a significant correlation between Stephanodiscus and the percentage contribution and content of EPA throughout the study. Hence, freshwater diatoms can differ strongly in content of the essential EPA. 3. We considered abundant cyanobacteria as a potential source of 18:3omega3 fatty acid (linolenic, ALA) to aquatic food webs. Among four dominant cyanobacteria species, two (Anabaena flos-aquae and Planktothrix agardhii) showed significant correlation with the ALA content of the seston, while the other two (Aphanizomenon flos-aquae and Microcystis aeruginosa) did not. 4. Dinophyta had a relatively high level of 22:6omega3 (docosahexaenoic, DHA) for freshwater species and can be also a source of EPA to aquatic food webs. 5. Our results show that various species of diatoms as well as cyanobacteria can be of contrasting nutritional value for zooplankton because of their different content of the essential PUFAs. Diatoms, which are low in EPA, could not be considered as a valuable food, while some field populations of cyanobacteria might be valuable sources of essential ALA.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Prudnikova S.V., Filipenko M.L., Khrapov E.A., Vasiliev A. D., Volova, Tatiana G.
Заглавие : Biodegradation of polyhydroxyalkanoates by soil microbial communities of different structures and detection of PHA degrading microorganisms
Коллективы : Government of the Russian Federation [11.G34.31.0013]; Presidium of the Siberian Branch of Russian Academy of Sciences [96]
Место публикации : Appl. Biochem. Microbiol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2012. - Vol. 48, Is. 1. - С. 28-36. - 9. - ISSN 0003-6838, DOI 10.1134/S0003683812010024
Примечания : Cited References: 39. - The work was supported by the project initiated by the Government of the Russian Federation for governmental support of scientific research conducted under the guidance of leading scientists at Russian institutions of higher learning (Agreement No. 11.G34.31.0013) and the Program of Integrated Research of the Presidium of the Siberian Branch of Russian Academy of Sciences (project no. 96).
Предметные рубрики: POLY-BETA-HYDROXYBUTYRATE
CHAIN-LENGTH POLYHYDROXYALKANOATES
DEGRADATION
FILMS
POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE)
BACTERIA
ACID
Аннотация: Biodegradation of microbial linear polymers of hydroxyalkanoic acids (polyhydroxyalkanoates, PHAs) by soil microbial communities of different structures has been studied during two field seasons in different weather conditions. This process was shown to be influenced by the polymer chemical composition, temperature, humidity, and the microbial soil component. The PHA degradation was accompanied by a decrease in the polymer molecular weight and an increase in the degree of crystallinity, indicating the preferential destruction of the amorphous phase compared to the crystalline one. The quantity of the true PHA destructors developing at the surface of the polymer samples was lower than the quantity of accompanying bacteria. The dominant PHA degrading microorganisms under the test conditions were identified as bacteria of the genera Variovorax, Stenotrophomonas, Acinetobacter, Pseudomonas, Bacillus, and Xanthomonas and as micromycetes from Penicillium, Paecilomyces, Acremonium, Verticillium, and Zygosporium.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khromechek, Elena B., Barkhatov, Yuri, V, Rogozin, Denis Y.
Заглавие : Community structure and vertical distribution of planktonic ciliates in the saline meromictic lake Shira during breakdown of meromixis
Колич.характеристики :11 с
Коллективы : RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Krai Government; Krasnoyarsk Regional Fund of Science [19-44-240002]; Russian Foundation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR) [19-05-00428]
Место публикации : Ecohydrol. Hydrobiol.: INT CENTRE ECOLOGY, POLISH ACAD SCIENCES, 2021. - Vol. 21, Is. 1. - С. 142-152. - ISSN 1642-3593, DOI 10.1016/j.ecohyd.2020.08.001. - ISSN 2080-3397(eISSN)
Примечания : Cited References:41. - The authors are grateful to F.F. Kozlov, V.V. Zykov, and A.P. Tolomeev for their assistance during field studies. The present study was funded by RFBR and Krasnoyarsk Krai Government and the Krasnoyarsk Regional Fund of Science, project number 19-44-240002. The present study was financially supported by Russian Foundation for Basic Research (RFBR) Project No. 19-05-00428.
Предметные рубрики: SHUNET SOUTH SIBERIA
SEASONAL SUCCESSION
PROTOZOA
FOOD
Аннотация: The study deals with the vertical distribution and seasonal dynamics of planktonic ciliates in the pelagic and littoral zones of a saline meromictic Lake Shira. Fourteen species of free-living ciliates have been found in the Lake, seven of them inhabiting the pelagic zone. The richness of ciliates is higher both in terms of the number of species and biomass in the littoral zone compared to the pelagic zone. Although the ciliate species diversity is low in the pelagic zone, in certain seasons, the biomass of some of the species may reach considerable values, up to 3.4 g m(-2) in the water column. The biomass of ciliates in Lake Shira is generally comparable to the average values for other mesotrophic lakes. The abundance and composition of ciliate populations in Lake Shira vary considerably with depth. Changes in the Lake ecosystem caused by meromixis breakdown in 2015-2016, which induced considerable variations in many Lake components, affected the vertical distribution of planktonic ciliates. However, the annual average biomass of the species that inhabited the Lake before meromixis breakdown remained unchanged. The total ciliate biomass increased due to the presence of the new species. (C) 2021 European Regional Centre for Ecohydrology of the Polish Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khromechek E. B., Barkhatov Y. V., Rogozin D. Y.
Заглавие : Community structure and vertical distribution of planktonic ciliates in the saline meromictic lake Shira during breakdown of meromixis
Место публикации : Ecohydrol. Hydrobiol.: Elsevier B.V., 2020. - Article in press. - ISSN 16423593 (ISSN), DOI 10.1016/j.ecohyd.2020.08.001
Аннотация: The study deals with the vertical distribution and seasonal dynamics of planktonic ciliates in the pelagic and littoral zones of a saline meromictic Lake Shira. Fourteen species of free-living ciliates have been found in the Lake, seven of them inhabiting the pelagic zone. The richness of ciliates is higher both in terms of the number of species and biomass in the littoral zone compared to the pelagic zone. Although the ciliate species diversity is low in the pelagic zone, in certain seasons, the biomass of some of the species may reach considerable values, up to 3.4 g m?2 in the water column. The biomass of ciliates in Lake Shira is generally comparable to the average values for other mesotrophic lakes. The abundance and composition of ciliate populations in Lake Shira vary considerably with depth. Changes in the Lake ecosystem caused by meromixis breakdown in 2015-2016, which induced considerable variations in many Lake components, affected the vertical distribution of planktonic ciliates. However, the annual average biomass of the species that inhabited the Lake before meromixis breakdown remained unchanged. The total ciliate biomass increased due to the presence of the new species. © 2020 Elsevier Ltd
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sushchik N.N., Gladyshev M.I., Kalachova G.S., Makhutova O.N., Ageev A.V.
Заглавие : Comparison of seasonal dynamics of the essential PUFA contents in benthic invertebrates and grayling Thymallus arcticus in the Yenisei river
Место публикации : Comparative Biochemistry and Physiology - B Biochemistry and Molecular Biology. - 2006. - Vol. 145, Is. 3-4. - С. 278-287. - ISSN 10964959 (ISSN) , DOI 10.1016/j.cbpb.2006.05.014
Ключевые слова (''Своб.индексиров.''): benthic invertebrates--grayling--polyunsaturated fatty acids--riverine food web--essential fatty acid--long chain fatty acid--polyunsaturated fatty acid--amphipoda--animal tissue--annelid worm--article--benthos--chironomidae--comparative study--controlled study--dominant inheritance--ecosystem--evolution--fatty acid analysis--female--fish--fly--invertebrate--larva--male--metabolic regulation--nonhuman--nutrient dynamics--priority journal--river--seasonal variation--statistical significance--thymallus arcticus--animals--fatty acids, unsaturated--food chain--gastrointestinal contents--invertebrates--muscles--rivers--russia--salmonidae--seasons--amphipoda--chironomidae--diptera--gammaridae--invertebrata--oligochaeta (metazoa)--thymallus arcticus--trichoptera
Аннотация: Seasonal dynamics of contents of essential polyunsaturated fatty acids (PUFA) in dominant groups of benthic invertebrates: gammarids (Gammaridae, Amphipoda), oligochaetes (Oligochaeta), chironomid larvae (Chironomidae, Diptera) and caddisfly larvae (Trichoptera), and dominant benthivorous fish, Siberian grayling Thymallus arcticus, have been studied in ecosystem of the large Siberian river. During the year of the study most benthic invertebrate taxa showed significant variations in the contents of both C-18 and long chain C-20-22 PUFAs. In contrast, the fish, which consumed the zoobenthos, had no significant seasonal variations in long chain PUFAs' contents. Thereby, the fish, as organisms of relatively higher evolution level than invertebrates, was supposed to have more strict metabolic control of long chain PUFAs' contents. Evidence was obtained that the studied fish species, grayling, may be capable to convert dietary EPA into DHA. В© 2006 Elsevier Inc. All rights reserved.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Gribovskaya I.V., Moskvicheva A.V., Muchkina E.Y., Chuprov S.M., Ivanova E.A.
Заглавие : Content of metals in compartments of ecosystem of a Siberian pond
Колич.характеристики :6 с
Место публикации : Arch. Environ. Contam. Toxicol.: SPRINGER-VERLAG, 2001. - Vol. 41, Is. 2. - P157-162. - ISSN 0090-4341
Примечания : Cited References: 26
Предметные рубрики: CHIRONOMUS-RIPARIUS MEIGEN
NELSON RIVER SYSTEM
AQUATIC MACROPHYTES
LARVAE DIPTERA
HEAVY-METAL
COPPER
LEAD
SEDIMENTS
CADMIUM
MANITOBA
Аннотация: During three field seasons (June-September) of 1997-99 contents of Na, K, Ca, Mg, Fe, Mn, Zn, Cu, Al, Cr, Ni, Cd, and Pb were determined in compartments of ecosystem (surrounding soils, bottom sediments, water, zoobenthos, macrophytes, and fish) of a fish and recreation pond situated at the edge of Krasnoyarsk City (Siberia, Russia). Contents of most parts of metals in soils, water, and macrophytes significantly correlated with each other. As concluded, their contents were determined by natural, general, geochemical peculiarities of the region. Heavy metals, contents of which were higher than federal upper limits of concentration, were revealed. In muscles of fish with different feeding spectra-crucian and perch-concentrations of some metals differed significantly; correlation graphs for metals also had different structures. Comparison of our data with those on diverse aquatic ecosystems of Siberia, Europe, North America, and China published in the last decade was carried out. It was concluded that a distribution of heavy metals in the compartments of an aquatic ecosystem presently have to be determined for each particular water body until general regularities are discovered.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Gribovskaya I.V., Moskvicheva A.V., Muchkina E.Y., Chuprov S.M., Ivanova E.A.
Заглавие : Content of metals in compartments of ecosystem of a Siberian pond
Место публикации : Archives of Environmental Contamination and Toxicology. - 2001. - Vol. 41, Is. 2. - С. 157-162. - ISSN 00904341 (ISSN) , DOI 10.1007/s002440010233
Ключевые слова (''Своб.индексиров.''): aluminum--cadmium--calcium--chromium--copper--heavy metal--iron--lead--magnesium--manganese--nickel--potassium--sodium--zinc--aquatic ecosystem--biological uptake--heavy metal--pond--article--bioaccumulation--ecosystem--fish--nonhuman--pond--priority journal--russian federation--sediment--soil pollution--water contamination--animals--ecosystem--environmental monitoring--fishes--geologic sediments--invertebrates--metals, heavy--plants--water pollutants--russian federation
Аннотация: During three field seasons (June-September) of 1997-99 contents of Na, K, Ca, Mg, Fe, Mn, Zn, Cu, Al, Cr, Ni, Cd, and Pb were determined in compartments of ecosystem (surrounding soils, bottom sediments, water, zoobenthos, macrophytes, and fish) of a fish and recreation pond situated at the edge of Krasnoyarsk City (Siberia, Russia). Contents of most parts of metals in soils, water, and macrophytes significantly correlated with each other. As concluded, their contents were determined by natural, general, geochemical peculiarities of the region. Heavy metals, contents of which were higher than federal upper limits of concentration, were revealed. In muscles of fish with different feeding spectra - crucian and perch - concentrations of some metals differed significantly; correlation graphs for metals also had different structures. Comparison of our data with those on diverse aquatic ecosystems of Siberia, Europe, North America, and China published in the last decade was carried out. It was concluded that a distribution of heavy metals in the compartments of an aquatic ecosystem presently have to be determined for each particular water body until general regularities are discovered.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Makhutova O.N., Dubovskaya O.P., Kravchuk E.S., Kalachova G.S., Khromechek E.B.
Заглавие : Correlations between fatty acid composition of seston and zooplankton and effects of environmental parameters in a eutrophic Siberian reservoir
Место публикации : Limnologica. - 2010. - Vol. 40, Is. 4. - С. 343-357. - ISSN 00759511 (ISSN) , DOI 10.1016/j.limno.2009.12.004
Ключевые слова (''Своб.индексиров.''): eicosapentaenoic acid--fatty acids--phytoplankton--temperature--zooplankton--canonical analysis--correlation--eutrophic environment--fatty acid--multivariate analysis--phytoplankton--seasonal variation--seston--taxonomy--temperature effect--water temperature--zooplankton--algae--bacillariophyta--ciliophora--cyanobacteria--cyclopoida--rotifera
Аннотация: During two sampling seasons we analyzed on weekly basis fatty acid (FA) composition of seston fraction 130?m and zooplankton fraction 130?m, and compared them using a multivariate canonical correlation analysis (CCA). Besides, we evaluated a possible impact of water temperature and inorganic nutrients on FA composition of the seston and the zooplankton.In spite of significant differences in percentages of several individual FAs, we found very strong canonical correlation (cross-correlation, 1-week lag) between FA composition of the seston and the zooplankton. The most important factor, providing the overall canonical cross-correlation between FA profiles of the seston and the zooplankton fractions was eicosapentaenoic acid (20:5?3, EPA). FA composition of the zooplankton fraction had comparatively poor correlations with taxonomic composition of the zooplankton. Thus, seasonal variations of FA composition of the zooplankton were determined primarily by seasonal changes in FA composition of the seston, rather than by taxonomic differences of FA profiles between rotifers, cyclopoids and cladocerans. FA composition of the seston was strongly affected by its taxonomic composition, namely by that of phytoplankton. According to CCA, the highest factor loadings pertained to diatoms interacting with their marker acids, including EPA, and cyanobacteria and greens, interacting with their marker acids. Ciliates and small rotifers composed considerable and sometimes major part of the seston biomass, but according to CCA their contributions to seasonal variations of the total FA profile of the seston were insignificant. This finding indirectly support the conclusion of the other authors, that the main source of FAs presented in ciliates and rotifers must be sought in algae and that they do not modify FA composition of food consumed, apart from repackaging it.Water temperature was the principal environmental parameter which drove the overall variations of FA composition. Factor loadings for the inorganic nutrients were comparatively negligible. The main contribution in the seasonal variation of FA composition of the seston was given by negative interaction between water temperature and percentage of EPA in the seston. В© 2009 Elsevier GmbH.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Gladyshev M.I., Trusova M.Yu., Zhila N.O.
Заглавие : Degradation of polyhydroxyalkanoates and the composition of microbial destructors under natural conditions
Место публикации : Microbiology. - 2006. - Vol. 75, Is. 5. - С. 593-598. - ISSN 00262617 (ISSN) , DOI 10.1134/S0026261706050092
Ключевые слова (''Своб.индексиров.''): 16s rrna--biodegradation--identification--polyhydroxyalkanoates--bacteria (microorganisms)
Аннотация: The degradation dynamics of polyhydroxyalkanoates of different composition has been studied in an eutrophic storage reservoir for two seasons. It has been shown that the biodegradation of polymers under natural conditions depends not only on their structure and physicochemical properties but also, to a great extent, on a complex of weather-climatic conditions affecting the state of the reservoir ecosystem. The molecular genetic analysis of 16S rRNA has revealed bacterial species (clones) probably involved in the degradation of polyhydroxyalkanoates in a model storage reservoir. В© Nauka/Interperiodica 2006.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kravchuk E.S., Gladyshev M.I., Ivanova E.A.
Заглавие : Dependence of the domination of Anabaena flos-aquae (Lyngb.) Breb. in the phytoplankton community on the initial abundance of akinetes
Место публикации : Doklady Biological Sciences. - 2007. - Vol. 416, Is. 1-6. - С. 377-378. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496607050158
Ключевые слова (''Своб.индексиров.''): anabaena flos-aquae--anabaena--animal--article--biological model--biomass--cyanobacterium--metabolism--microbiology--physiology--phytoplankton--russian federation--season--sediment--anabaena--animals--biomass--cyanobacteria--geologic sediments--models, biological--phytoplankton--russia--seasons--water microbiology
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Anishchenko O.V., Makhutova O.N., Kolmakov V.I., Kalachova G.S., Kolmakova A.A., Dubovskaya O.P.
Заглавие : Efficiency of transfer of essential polyunsaturated fatty acids versus organic carbon from producers to consumers in a eutrophic reservoir
Место публикации : Oecologia. - 2011. - Vol. 165, Is. 2. - С. 521-531. - ISSN 00298549 (ISSN) , DOI 10.1007/s00442-010-1843-6
Ключевые слова (''Своб.индексиров.''): phytoplankton--production--pufa--trophic level--zooplankton--carbon--fresh water--unsaturated fatty acid--biomass--eutrophic environment--fatty acid--net primary production--organic carbon--paradigm shift--phytoplankton--reservoir--secondary production--trophic level--zooplankton--animal--article--eutrophication--food chain--functional food--growth, development and aging--metabolism--phytoplankton--season--zooplankton--animals--carbon--eutrophication--fatty acids, unsaturated--food chain--fresh water--functional food--phytoplankton--seasons--zooplankton--animalia
Аннотация: One of the central paradigms of ecology is that only about 10% of organic carbon production of one trophic level is incorporated into new biomass of organisms of the next trophic level. Many of energy-yielding compounds of carbon are designated as 'essential', because they cannot be synthesized de novo by consumers and must be obtained with food, while they play important structural and regulatory functions. The question arises: are the essential compounds transferred through trophic chains with the same efficiency as bulk carbon? To answer this question, we measured gross primary production of phytoplankton and secondary production of zooplankton and content of organic carbon and essential polyunsaturated fatty acids of ?-3 family with 18-22 carbon atoms (PUFA) in the biomass of phytoplankton and zooplankton in a small eutrophic reservoir during two summers. Transfer efficiency between the two trophic levels, phytoplankton (producers) and zooplankton (consumers), was calculated as ratio of the primary production versus the secondary (zooplankton) production for both carbon and PUFA. We found that the essential PUFA were transferred from the producers to the primary consumers with about twice higher efficiency than bulk carbon. In contrast, polyunsaturated fatty acids with 16 carbon atoms, which are synthesized exclusively by phytoplankton, but are not essential for animals, had significantly lower transfer efficiency than both bulk carbon, and essential PUFA. Thus, the trophic pyramid concept, which implicitly implies that all the energy-yielding compounds of carbon are transferred from one trophic level to the next with the same efficiency of about on average 10%, should be specified for different carbon compounds. В© 2010 Springer-Verlag.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sid'ko A. F., Botvich I. Y., Pisman T. I., Shevyrnogov A. P.
Заглавие : Estimation of chlorophyll content and yield of wheat crops from reflectance spectra obtained by ground-based remote measurements
Место публикации : Field Crops Res.: Elsevier B.V., 2017. - Vol. 207. - С. 24-29. - ISSN 03784290 (ISSN) , DOI 10.1016/j.fcr.2016.10.023
Ключевые слова (''Своб.индексиров.''): chlorophyll potential--optical remote method--wheat--triticum aestivum
Аннотация: This study aimed to analyze the relationship between chlorophyll potential, chlorophyll content, and grain yield of different wheat cultivars by using ground remote sensing and laboratory data. Chlorophyll potential is the difference between the reflectance factor integrals with and without chlorophyll absorption (in the 550–730 nm wavelength range). Ground-truth data were obtained at the experimental fields located in the Krasnoyarsk region, Russia (2002–2012). Experiments were conducted in different seasons under various lighting conditions by controlling plants states and soil types. Spectral measurements were obtained using a double-beam spectroradiometer, which was installed on a mobile work platform at a height of 5–18 m. The photometric area varied from 0.5 to 2 m2. The study showed good correlation (R2 = 0.9) between chlorophyll potential and chlorophyll content for different wheat cultivars. However, the correlation between chlorophyll potential and grain yield was less (R2 = 0.8). The values of chlorophyll potentials depended on the type of wheat during the growing season. The novelty of the approach is that it calculates the chlorophyll potential with additional spectral regions when compared with normalized difference vegetation index. We used a spectroradiometer with high spectral resolution. This increased the accuracy and stability of measurements in rapidly changing conditions. © 2016
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Kravchuk E.S., Kolmakov V.I., Ivanova E.A., Trusova M.Y., Sushchik N.N., Gribovskaya I.V.
Заглавие : Experimental study of postwintering germination of akinetes and dormant cells of cyanoprocaryotes from bottom sediments of blooming and nonblooming ponds.
Место публикации : Doklady Biological Sciences. - 2002. - Vol. 383, Is. 1-6. - С. 131-132. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): fresh water--article--cyanobacterium--cytology--growth, development and aging--microbiology--physiology--season--cyanobacteria--fresh water--seasons--water microbiology
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tolomeev A.P., Sushchik N.N., Gulati R.D., Makhutova O.N., Kalacheva G.S., Zotina T.A.
Заглавие : Feeding spectra of Arctodiaptomus salinus (Calanoida, Copepoda) using fatty acid trophic markers in seston food in two salt lakes in South Siberia (Khakasia, Russia)
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 513-530. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9331-y
Ключевые слова (''Своб.индексиров.''): arctodiaptomus salinus--brackish lakes--fatty acids--feeding spectra--salinity adaptation--adaptation--bacterium--brackish water--ciliate--comparative study--crustacean--cyanobacterium--fatty acid--feeding behavior--flagellate--food selection--green alga--lipid--physicochemical property--picoplankton--saline lake--salinity--seasonality--seston--khakassia--russian federation--siberia--animalia--arctodiaptomus salinus--bacillariophyta--bacteria (microorganisms)--calanoida--chlorophyta--ciliophora--copepoda--cryptomonas--cryptophyta--cyanobacteria--mastigophora (flagellates)--proteobacteria
Аннотация: During two vegetation seasons (2004-2005), we compared feeding spectra of Arctodiaptomus salinus (Calanoida, Copepoda) populations inhabiting two neighboring salt lakes, Shira and Shunet, Khakasia, Russia, using fatty acid (FA) trophic markers. Sestonic FA composition in two lakes moderately differed, whereas levels of diatom FA markers were higher in Lake Shunet and of Cyanobacteria and green algae markers in Lake Shira. In general, markers in storage lipids-triacylglycerols (TAG) of A. salinus-reflected the differences in sestonic composition of the two lakes. Nevertheless, TAG fraction was also enriched by FA trophic markers of the minor components of seston, which were selectively ingested by the animals. In Lake Shira, A. salinus had significantly higher concentrations of bacterial FA markers in TAG. In Lake Shunet, TAG of A. salinus contained significantly higher relative amounts of 18:4?3, 18:5?3 and C22 polyunsaturated fatty acids (PUFA), which indicated marked contribution of cryptophytes or (and) flagellates into the diet. Laboratory experiments showed feeding on Cryptomonas and sulfur purple bacteria in Lake Shunet and ciliates and colonial picoplankton in both lakes, and generally confirmed the differences in FA trophic markers in A. salinus between the lakes. The two populations of A. salinus markedly differed in levels of essential long-chain PUFA, eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids, although the levels of these FA in seston were quite similar between the two lakes. The higher levels of the essential ?3 PUFA in A. salinus in Lake Shunet may be an adaptive response of the animals to a vertical stratification of physico-chemical conditions and significantly higher salinity levels at the boundary of adjacent bottom layer in this lake. В© 2010 Springer Science+Business Media B.V.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Kolmakov V.I., Kravchuk E.S., Ivanova E.A., Trusova M.Y., Gribovskaya I.V., Zhilenkov M.D.
Заглавие : Growth and survival of cyanobacteria in water from blooming and nonblooming ponds under experimental conditions.
Место публикации : Doklady Biological Sciences. - 2000. - Vol. 375. - С. 607-609. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): chlorophyll--fresh water--phosphorus--anabaena--arctic--article--biomass--comparative study--cyanobacterium--growth, development and aging--microbiology--ph--plant--russian federation--season--anabaena--arctic regions--biomass--chlorophyll--cyanobacteria--fresh water--hydrogen-ion concentration--phosphorus--plants--russia--seasons
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Sushchik N.N., Dubovskaya O.P., Makhutova O.N., Kalachova G.S.
Заглавие : Growth rate of Daphnia feeding on seston in a Siberian reservoir: The role of essential fatty acid
Место публикации : Aquatic Ecology. - 2008. - Vol. 42, Is. 4. - С. 617-627. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-007-9146-7
Ключевые слова (''Своб.индексиров.''): eicosapentaenoic acid--predictor of growth rate--seston--zooplankton--concentration (composition)--crustacean--fatty acid--growth rate--reservoir--seston--zooplankton--eurasia--siberia--daphnia
Аннотация: Specific growth rates (based on biomass increment in unit time) of Daphnia fed natural reservoir seston from a eutrophic Siberian reservoir were studied during four vegetation seasons in a laboratory flow-through system. Concentrations of particulate C, N, and P in reservoir seston <115 ?m were comparatively high, 1.9, 0.2, and 0.05 mg l-1, respectively; maximum C:P ratio was 259 mol:mol. According to conventional thresholds, concentrations of elements and their stoichiometry did not limit the growth rate of Daphnia. Eicosapentaenoic acid (EPA) in seston significantly effected the growth rates at concentrations up to ?13 ?g l-1 (regression ANOVAR F-test value was 7.91), but not above this concentration. Thus, we consider this concentration of EPA in seston <115 ?m to be the limiting concentration of EPA for the growth of Daphnia (longispina group), i.e., below this concentration EPA was the best single predictor of the growth of Daphnia. В© 2007 Springer Science+Business Media B.V.
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