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Amino acid composition of epilithic biofilm and benthic animals in a large Siberian river / A. A. Kolmakova [et al.] // Freshwater Biology. - 2013. - Vol. 58, Is. 10. - P2180-2195, DOI 10.1111/fwb.12200 . - ISSN 0046-5070
Кл.слова (ненормированные):
Amino acids -- Epilithic microalgae and cyanobacteria -- Nutritive quality -- River ecosystem -- Zoobenthos
Аннотация: We studied amino acid (AA) composition of epilithic biofilms and zoobenthos near the shore at a middle section of the Yenisei River (Siberia, Russia). We hypothesised that there was an imbalance between the composition and content of amino acids in the biofilm and its consumers, the zoobenthos, as well as between those in the zoobenthos and fish. Based on monthly sampling from 2007 to 2010, there was seasonal variation in AA profiles in the epilithic biofilms, probably caused by the succession of microalgal and cyanobacterial species. Overall, there was an imbalance in the percentage of the essential amino acids (lysine and histidine) between benthic animals and their food (the epilithic biofilm), which suggests that benthic animals may be limited by food quality. Moreover, the zoobenthos had a significantly higher content of AA, relative to carbon, than the biofilm. Based on sampling in 2012, there was an imbalance between the AA profiles of zoobenthos and that of their main consumer, the Siberian grayling (Thymallus arcticus), particularly in the percentages of two essential amino acids, lysine and leucine. In terms of overall content of essential amino acids, the nutritional value to fish of gammarids, which have recently invaded the river, was significantly lower than that of indigenous taxa, trichopteran and chironomid larvae. В© 2013 John Wiley & Sons Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Science, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kolmakova, A.A.; Gladyshev, M.I.; Kalachova, G.S.; Kravchuk, E.S.; Ivanova, E.A.; Sushchik, N.N.

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Seasonal distribution and fatty acid composition of littoral microalgae in the Yenisei River / N. N. Sushchik [et al.] // Journal of Applied Phycology. - 2010. - Vol. 22, Is. 1. - P11-24, DOI 10.1007/s10811-009-9418-9 . - ISSN 0921-8971
Кл.слова (ненормированные):
Fatty acids -- Riverine microalgae -- Taxa composition -- Temperature adaptations -- algae -- Bacillariophyta -- Chlorophyta -- Cyanobacteria
Аннотация: We studied fatty acid (FA) composition of littoral microalgae in the fast-flowing oligotrophic river, the Yenisei, Siberia, monthly for 3 years. Seasonal dynamics of species composition had similar patterns in all the studied years. In springs, a pronounced dominance of filamentous green algae occurred, in summer and autumn diatoms were abundant, and in late autumn and winter epilithic biofilms consisted primarily of cyanobacteria and detritus. In general, FA composition of the algal periphytic community was dominated by 16:0, 16:1?7, 20:5?3, 14:0, and 18:3?3 throughout the studied period. Several groups of FAs, which had peculiar seasonal dynamics, were differentiated by statistical analysis based on a method of correlation graphs. The seasonal changes in FA composition could be partly explained by the seasonal succession of species composition of the community. Besides, we found that populations of both diatom and green algae grown in summer at a higher water temperature were lower in polyunsaturated fatty acids than those in spring, at a lower temperature. Hence, we suppose that the regular seasonal dynamics of FA composition of the studied littoral microalgae was driven both by changes in species composition and by temperature adaptations of the algal populations. The highest content of essential polyunsaturated FAs, eicosapentaenoic and docosahexaenoic acids, in the spring "psychrophilic" populations of diatoms could make them of the higher nutritive value for zoobenthic primary consumers. В© Springer Science+Business Media B.V. 2009.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk 660041, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Sushchik, N.N.; Gladyshev, M.I.; Ivanova, E.A.; Kravchuk, E.S.

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Dynamics of algal biomass and composition of extracellular free fatty acids in experimental microecosystems / N. N. Sushchik // Biology Bulletin. - 1998. - Vol. 25, Is. 6. - P611-616 . - ISSN 1062-3590
Аннотация: The dynamics of biomass and species composition of microalgae and of composition of extracellular free fatty acids was studied for 98 days in laboratory experimental ecosystems inoculated with water from a forest pond. The microecosystems were kept at two temperature levels: 14-17 and 22-25В°C. During the experiment, a community of planktonic microalgae with the predominance of diatoms was succeeded by a community consisting mostly of green, filamentous algae. The succession of species composition of the algal community was accompanied by changes in the composition of extracellular free fatty acids. Variations of temperature did not markedly affect either the species composition of the microalgal community or the ratio of unsaturated to saturated free fatty acids. В© 1998 MAK Haya/Interperiodica Publishing.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 66036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Sushchik, N.N.

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Model approaches to description of critical phenomena in forest ecosystems / A. S. Isaev, V. G. Soukhovolsky, R. G. Khlebopros // Contemporary Problems of Ecology. - 2011. - Vol. 4, Is. 7. - P699-705, DOI 10.1134/S1995425511070010 . - ISSN 1995-4255
Кл.слова (ненормированные):
critical phenomena -- ecosystem -- modeling -- phase transitions -- population -- population dynamics -- data set -- ecosystem modeling -- forest ecosystem -- forest fire -- insect -- optimization -- population dynamics -- succession -- Hexapoda
Аннотация: Methodological bases of optimization modeling approach are considered in regard to describing critical phenomena in forest ecosystems. Models of insects' outbreaks, forest successions, forest fires as second order phase transitions are proposed. It is shown that there is fair correlation between model calculations and observations data. В© 2011 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Center on the Problems of Ecology and Productivity of Forests, Russian Academy of Sciences, ul. Profsoyuznaya 84/32, Moscow 117997, Russian Federation
Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/28, Krasnoyarsk 660036, Russian Federation
Intern Cntr 4 Rrch o Extr. St. of Organi w in Pres., of Krasnoyarsk Res Ctr of Sib Brnch of the Russ. Ac of Sc, Akademgorodok, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Isaev, A.S.; Soukhovolsky, V.G.; Khlebopros, R.G.

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Remote Ground-Based and Satellite Monitoring of Vegetation / A. P. Shevyrnogov [et al.] // Her. Russ. Acad. Sci. - 2018. - Vol. 88, Is. 6. - P469-474, DOI 10.1134/S1019331618060138. - Cited References:20. - This study was performed within the RAS Siberian Branch Integrated Basic Research Program "Interdisciplinary Integrative Studies" for 2018-2020 (project no. 74) and a state assignment (state registration AAAA-A17-117013050027-1). . - ISSN 1019-3316. - ISSN 1555-6492

РУБ History & Philosophy Of Science + Multidisciplinary Sciences
Рубрики:
GROWTH
Кл.слова (ненормированные):
agrocenoses -- grass vegetation -- halophytes -- ground spectrometry -- satellite sensing -- chlorophyll photosynthetic potential -- mathematical -- modeling
Аннотация: Prospects for remote ground and satellite sensing to monitor agricultural (agrocenoses) and grass (meadows and steppes) vegetation are considered. This helps assess chlorophyll contents, crop yields, impurities of territories and identify agrocenoses. Investigation of vegetation on salinized soils identified the necessity to consider the succession of limiting factors (temperature and the degree of soil salinization). The results of studies on grassland plant communities in Khakassia based on geobotanical descriptions and ground spectral measurements are presented, allowing the refinement of methods that improve the accuracy of deciphering satellite images of medium and low resolutions.

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Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Res Ctr, Inst Biophys, Krasnoyarsk, Russia.

Доп.точки доступа:
Shevyrnogov, A. P.; Botvich, I. Yu.; Kononova, N. A.; Pis'man, T. I.; RAS Siberian Branch Integrated Basic Research Program "Interdisciplinary Integrative Studies" for 2018-2020 [74]

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Community structure and vertical distribution of planktonic ciliates in the saline meromictic lake Shira during breakdown of meromixis / E. B. Khromechek, Y. V. Barkhatov, D. Y. Rogozin // Ecohydrol. Hydrobiol. - 2021. - Vol. 21, Is. 1. - P142-152, DOI 10.1016/j.ecohyd.2020.08.001. - 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. . - ISSN 1642-3593. - ISSN 2080-3397

РУБ Ecology + Water Resources
Рубрики:
SHUNET SOUTH SIBERIA
   SEASONAL SUCCESSION
   PROTOZOA
   FOOD
Кл.слова (ненормированные):
Ciliates -- Meromictic lakes -- Chemocline -- Meromixis breakdown
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.

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

Доп.точки доступа:
Khromechek, Elena B.; Barkhatov, Yuri, V; Rogozin, Denis Y.; Barkhatov, Yuri V.; 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]

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