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Differences in organic matter and bacterioplankton between sections of the largest Arctic river: Mosaic or continuum? [Text] / M. I. Gladyshev [et al.] // Limnol. Oceanogr. - 2015. - Vol. 60, Is. 4. - P1314-1331, DOI 10.1002/lno.10097. - Cited References:75. - At the stage of laboratory analyses, calculations, and generalizations, the work was supported by the project No. 6.1089.214/K of Siberian Federal University, carried out according to Federal Tasks of Ministry of Education and Science of Russian Federation, and by Russian Federal Tasks of Fundamental Research (project No. 51.1.1). The research cruise was supported by the Attracting Leading Scientists to Russian Educational Institutions Program of the Russian Federation, agreement 11.G34.31.0014. . - ISSN 0024-3590. - ISSN 1939-5590

РУБ Limnology + Oceanography
Рубрики:
FATTY-ACID-COMPOSITION
   KARA SEA
   YENISEI RIVER
   CARBON-CYCLE
Аннотация: We studied biogeochemical characteristics, including organic carbon and nitrogen contents, fatty acid (FA) composition, stable isotope ratios, and primary production in conjunction with species composition of bacterioplankton, using next generation sequencing, in the Yenisei River along a distance similar to 1800km. Basing on FA composition of particulate organic matter (POM) and on other indicators of sources of POM, the river was subdivided into four sections. The upper section 1, situated in mountain region, was the net source of high-quality autochthonous organic matter, produced primarily by diatoms and partly consumed by specialized bacteria species. Section 2 in plain taiga was net sink of high quality allochthonous and autochthonous organic matter, produced by cyanobacteria and green algae. Section 3 was net sink of organic matter, primarily allochthonous, consumed by the specialized species of bacteria. The lowest section 4, situated in tundra, was primarily the conduit of recalcitrant terrestrial organic matter, but also the net source of autochthonous organic matter, produced by diatoms. Biogeochemical traits of sections of the Yenisei River evidently shaped dominant species composition of bacterioplankton of these sections. Regarding the biogeochemical and microbiological data, we concluded that the Yenisei River ecosystem complexly combines features of river mosaic, river continuum, and "neutral pipe."

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Gladyshev, Michail I.; Kolmakova, Olesia V.; Tolomeev, Alexander P.; Anishchenko, Olesia V.; Makhutova, Olesia N.; Kolmakova, Anzhelika A.; Kravchuk, Elena S.; Glushchenko, Larisa A.; Kolmakov, Vladimir I.; Sushchik, Nadezhda N.; Siberian Federal University [6.1089.214/K]; Russian Federal Tasks of Fundamental Research [51.1.1]; Attracting Leading Scientists to Russian Educational Institutions Program of the Russian Federation [11.G34.31.0014]

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Meta-analysis of factors associated with omega-3 fatty acid contents of wild fish / M. I. Gladyshev [et al.] // Rev. Fish. Biol. Fish. - 2018. - Vol. 28, Is. 2. - P277-299, DOI 10.1007/s11160-017-9511-0. - Cited References:138. - The work was supported by a Russian Science Foundation Grant (No. 16-14-10001). . - ISSN 0960-3166. - ISSN 1573-5184

РУБ Fisheries + Marine & Freshwater Biology
Рубрики:
FATTY-ACID-COMPOSITION
DIETARY DOCOSAHEXAENOIC ACID
LONG-CHAIN
Кл.слова (ненормированные):
Docosahexaenoic acid -- Ecomorphological factors -- Eicosapentaenoic acid -- Nutritive value -- Phylogenetic factors
Аннотация: Fish are recognized as the main source of physiologically important omega-3 long-chain polyunsaturated fatty acids, namely, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), for human nutrition. However, muscle tissue contents of these fatty acids in diverse fish species, i.e., their nutritive value for humans, varied within two orders of magnitude. We reviewed contents of EPA and DHA, measured by similar methods using an internal standard during chromatography as mg per g of wet mass in 172 fish species belonging to 16 orders, to evaluate probable variations in phylogenetic and ecological drivers. EPA + DHA content varied from 25.6 mg g(-1) of wet mass (Sardinops sagax) to 0.12 mg g(-1) (Gymnura spp.). Multidimensional redundancy analysis revealed that among phylogenetic, ecomorphological and abiotic environmental factors, the highest proportion of variation contribution belonged to the shared contribution of sets of phylogenetic and ecomorphological factors. Specifically, the highest values of EPA + DHA content were characteristic of fish belonging to the orders Clupeiformes or Salmoniformes, were pelagic fast swimmers, ate zooplankton and inhabited marine waters or migrated from fresh to marine waters (anadromous migrations). High EPA and DHA content in muscle tissues of the above species appeared to be a metabolic adaptation for fast continuous swimming. In contrast to common beliefs, our meta-analysis did not support the significant influence of higher trophic levels (piscivory) and cold environments (homeoviscous adaptation) on EPA and DHA content in fish. However, many causes of high and low levels of physiologically important fatty acids in certain fish species remained unexplained and require evaluation in future studies.

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Держатели документа:
Russian Acad Sci, Fed Res Ctr, Krasnoyarsk Sci Ctr, Inst Biophys,Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny Av 79, Krasnoyarsk 660041, Russia.
Russian Acad Sci, AN Severtsov Inst Ecol & Evolut, Leninsky Prospect 33, Moscow 119071, Russia.
Lomonosov Moscow State Univ, Moscow 119899, Russia.

Доп.точки доступа:
Gladyshev, Michail I.; Sushchik, Nadezhda N.; Tolomeev, Alexander P.; Dgebuadze, Yury Yu; Russian Science Foundation [16-14-10001]

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Diverse impacts of semiaquatic bird colonies on biochemical composition of seston, plankton, and fish fry in a plain reservoir / A. V. Krylov [и др.] // Zhurnal Obshchei Biol. - 2018. - Vol. 79, Is. 6. - С. 449-460, DOI 10.1134/S0044459618060052. - Cited References:47 . - ISSN 0044-4596

РУБ Biology
Рубрики:
FATTY-ACID-COMPOSITION
   GROWTH
   ZOOPLANKTON
   ECOSYSTEMS
   NITROGEN
Аннотация: Diverse, multidirectional changes in biochemical composition of seston, plankton, and fish fry are detected in the coastal zone of a plain reservoir in the vicinity of a semiaquatic bird colony during vegetation season with extra high water level. Under these conditions, specific patterns of phyto- and zooplankton structure and quantitative characteristics, that, as was found out earlier, result from the vital activity of birds belonging to the family Ardeidae (namely, raising the share of mixotrophic phytoflagellates and copepods in plankton species composition) are leveled out. The main role in this process belongs to decomposition of immersed vegetation in the coastal zone, development of littoral macrophytes, and trophic relationships between algae and invertebrates. However, increase in atmospheric precipitation leads to increase in copepods abundance, which seems to be related to fast and intensive inflow of nitrogen-rich products of birds' vital activity. Due to this, during the whole period of observations, the following tendencies are revealed in biochemical composition of seston, plankton, and fish fry in the vicinity of the bird colony: 1) concentrations of carbon, nitrogen, and phosphorus and their ratios turn out to be auspicious for predominance of diatoms and mixotrophic phytoflagellates, rich in docosahexaenoic acid (DSA); 2) the abundance of phytoplankton, rich in polyunsaturated essential fatty acids (PEFA), favors propagation of those planktonic crustaceans which contain significantly more DSA and are more valuable food items for fish; 3) predominance of zooplankters, rich in PEFA, leads to higher concentration of PEFA in fry fish tissues, which, in certain periods, turns out to be advantageous for successful development and growth of dominant species of fish fry,such as roach, bream, white bream, and perch, by comparison with the test site.

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Держатели документа:
RAS, Papanin Inst Biol Inland Waters, Borok 152742, Yaroslavl Regio, Russia.
SD RAS, Krasnoyarsk Sci Ctr, Fed Res Ctr, Inst Biophys, Academgorodok 50,Bldg 50, Krasnoyarsk 660036, Russia.
Syberian Fed Univ, Svobodny Prosp 79, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Krylov, A., V; Makhutova, N.; Sakharova, E. G.; Sushchik, N. N.; Pavlov, D. D.; Kolmakova, A. A.; Stolbunov, I. A.; Gladyshev, M., I; Sakharova, Ekaterina

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Cupriavidus necator B-10646 growth and polyhydroxyalkanoates production on different plant oils / T. Volova, K. Sapozhnikova, N. Zhila // Int. J. Biol. Macromol. - 2020. - Vol. 164. - P121-130, DOI 10.1016/j.ijbiomac.2020.07.095. - Cited References:52. - This studywas financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning" (polymer synthesis fromplant oils), and by the State assignment of the Ministry of Science and Higher Education of the Russian Federation No. FSRZ-2020-0006 (polymer properties). . - ISSN 0141-8130. - ISSN 1879-0003

РУБ Biochemistry & Molecular Biology + Chemistry, Applied + Polymer Science
Рубрики:
FATTY-ACID-COMPOSITION
PHA SYNTHASE GENE
PALM KERNEL OIL
Кл.слова (ненормированные):
Cupriavidus necator B-10646 -- Plant oils -- Polyhydroxyalkanoates -- Fatty -- acids -- Emulsifiers
Аннотация: The study addresses the growth of the wild-type strain Cupriavidus necator B-10646 and synthesis of polyhydroxyalkanoates by this strain on media containing plant oils with different compositions of fatty acids: palm, Siberian oilseed, and refined and unrefined sunflower seed oils. The study showed that the best carbon substrate was palm oil. Comparison of fatty acid compositions of the starting oils and unutilized residual substrates showed that C. necator B-10646 cells consumed the fatty acids from palm oil evenly while in experiments with other oils, they utilized polyenoic fatty acids first. Higher production parameters of the culture were obtained by preparation of emulsified oil medium using Tween 80 and sodium cocoyl glutamate as emulsifiers. All polyhydroxyalkanoate specimens were terpolymers that contained 3-hydroxybutyrate as the major component and minor amounts of 3-hydroxyvalerate (0.9-1.9 mol%) and 3-hydroxyhexanoate (0.5-1.1 mol%). Molecular weight of polyhydroxyalkanoate specimens depended on the type of plant oil and emulsifier. (C) 2020 Elsevier B.V. All rights reserved.

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Держатели документа:
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
Krasnoyarsk Sci Ctr SB RAS, Inst Biophys SB RAS, Fed Res Ctr, 50-50 Akad Gorodok, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Volova, Tatiana; Sapozhnikova, Kristina; Zhila, Natalia; Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation; State assignment of the Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0006]

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