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Fatty acid analyses reveal high degrees of omnivory and dietary plasticity in pond-dwelling tadpoles / M. R. Whiles [et al.] // Freshwater Biology. - 2010. - Vol. 55, Is. 7. - P1533-1547, DOI 10.1111/j.1365-2427.2009.02364.x . - ISSN 0046-5070
Кл.слова (ненормированные):
Anura -- Diet -- Food web -- Foraging -- Gut contents -- Omnivory -- Selective feeding -- Amphibia -- Anura -- Bacteria (microorganisms) -- Hexapoda -- Lithobates -- Pseudacris crucifer
Аннотация: 1. Understanding the trophic relationships of consumers is central to ecology, but constructing meaningful food webs is often difficult because of a lack of detailed information on consumption versus assimilation and high degrees of omnivory.2. We used fatty acid analyses to examine the trophic relationships of three common larval anurans (Pseudacris crucifer, Lithobates catesbeianus and Lithobates clamitans) that are often classified as grazers or detritivores. Tadpoles and potential food sources were sampled in four ponds in southern Illinois and analysed for fatty acid composition. Single linkage cluster analysis was then used to compare fatty acid profiles among tadpole gut contents, tadpole muscle tissues and available food resources.3. Diets varied among species and within species among ponds, but organic sediments consistently contributed most to the fatty acid composition of the gut contents of all species. Fatty acid profiles also indicated that larval insects and phytoplankton were consumed by both L. catesbeianus and L. clamitans in one pond, while L. clamitans and P. crucifer consumed mainly periphyton along with sediments in another pond, and these diet differences appeared linked to physical differences among ponds, with periphyton and/or phytoplankton contributing more to tadpole diets in less shaded ponds.4. The fatty acid composition of muscle tissues of L. clamitans, the dominant tadpole in these systems, indicated that plant detritus and bacteria, which were the dominant components of organic sediments in the ponds, were common components of the assimilatory diet.5. Results demonstrate the utility of fatty acid analyses for assessing both consumption and assimilation. The tadpole assemblages we examined derive much of their energy from heterotrophic and allochthonous sources and exhibit high dietary plasticity. This information will allow for more accurate and comprehensive assessments of trophic interactions in freshwater habitats, as well as aid in amphibian conservation, management and captive propagation efforts. В© 2009 Blackwell Publishing Ltd.

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Держатели документа:
Department of Zoology, Center for Ecology, Illinois Fisheries and Aquaculture Center, Southern Illinois University, Carbondale, IL, United States
Institute of Biophysics of Siberian Branch of the Russian Academy of Science, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, Russian Federation
Department of Biology, Clarion University of Pennsylvania, Clarion, PA, United States : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Whiles, M.R.; Gladyshev, M.I.; Sushchik, N.N.; Makhutova, O.N.; Kalachova, G.S.; Peterson, S.D.; Regester, K.J.

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Seasonal dynamics of long-chain polyunsaturated fatty acids in littoral benthos in the upper Yenisei river / N. N. Sushchik [et al.] // Aquatic Ecology. - 2007. - Vol. 41, Is. 2. - P349-365, DOI 10.1007/s10452-006-9065-z . - ISSN 1386-2588
Кл.слова (ненормированные):
Essential compounds -- Periphytonic microalgae -- Riverine food chain -- Zoobenthos -- amphipod -- annelid -- benthos -- biomass -- diatom -- dominance -- fatty acid -- food chain -- larva -- littoral environment -- seasonal variation -- Eurasia -- Krasnoyarsk [Russian Federation] -- Russian Federation -- Yenisei River -- Amphipoda -- Annelida -- Arthropoda -- Bacillariophyta -- Chironomidae -- Gammaridae -- Hexapoda -- Invertebrata -- Oligochaeta (Metazoa) -- Trichoptera
Аннотация: We studied composition and concentrations of fatty acids (FAs) in benthos from pebbly littoral region of the Yenisei River in a sampling site near Krasnoyarsk city (Siberia, Russia) for 1 year from March 2003 to February 2004. Special attention was paid to major long-chain polyunsaturated fatty acids (PUFAs) of the ?3 family: eicosapentaenoic acid (EPA, 20:5?3) and docosahexaenoic acids (DHA, 22:6?3). In phytobenthos, which was dominated by diatoms, the annual maxima of EPA and DHA pool occurred in spring and early summer. In zoobenthos, EPA and DHA pool peaked in autumn, due mainly to an increase of the biomass of dominant taxa (gammarids) and to a moderate increase of the PUFA content per body weight. Seasonal peaks of EPA in overwintering insect larvae (chironomids and caddisflies) generally coincided with those of biomass of these larvae, while there was no such trend for amphipods and oligochaetes. In spring and early summer, the main part of ?3 PUFA, 40-97% of total amount, in the littoral region was contained in biomass of producers, i.e., benthic microalgae, and in autumn it was transferred to primary consumers-benthic invertebrates, which contained ?76-93% of total ?3 PUFAs. В© 2006 Springer Science+Business Media, B.V.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Krasnoyarsk State Agricultural University, Mira av., 88, Krasnoyarsk 660049, Russian Federation
Krasnoyarsk State University, Svobodny av., 79, Krasnoyarsk 660042, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

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

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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.

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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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Coelenterazine-dependent luciferases / S. V. Markova, E. S. Vysotski // Biochemistry Moscow. - 2015. - Vol. 80, Is. 6. - P714-732, DOI 10.1134/S0006297915060073 . - ISSN 0006-2979
Кл.слова (ненормированные):
bioluminescence -- coelenterazine -- luciferase -- luciferin -- Coelenterata -- Cypridina luciferin -- Fungi -- Hexapoda -- Mollusca -- Protozoa
Аннотация: Bioluminescence is a widespread natural phenomenon. Luminous organisms are found among bacteria, fungi, protozoa, coelenterates, worms, molluscs, insects, and fish. Studies on bioluminescent systems of various organisms have revealed an interesting feature - the mechanisms underlying visible light emission are considerably different in representatives of different taxa despite the same final result of this biochemical process. Among the several substrates of bioluminescent reactions identified in marine luminous organisms, the most commonly used are imidazopyrazinone derivatives such as coelenterazine and Cypridina luciferin. Although the substrate used is the same, bioluminescent proteins that catalyze light emitting reactions in taxonomically remote luminous organisms do not show similarity either in amino acid sequences or in spatial structures. In this review, we consider luciferases of various luminous organisms that use coelenterazine or Cypridina luciferin as a substrate, as well as modifications of these proteins that improve their physicochemical and bioluminescent properties and therefore their applicability in bioluminescence imaging in vivo. © 2015 Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Markova, S.V.; Vysotski, E.S.

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Fluxes of biomass and essential polyunsaturated fatty acids from water to land via chironomid emergence from a mountain lake / E. V. Borisova [et al.] // Contemp. Probl. Ecol. - 2016. - Vol. 9, Is. 4. - P446-457, DOI 10.1134/S199542551604003X . - ISSN 1995-4255
Кл.слова (ненормированные):
amphibiotic insect emergence -- biogenic fluxes from water to land -- Chironomidae -- mountain landscape -- polyunsaturated fatty acids -- Chironomidae -- Hexapoda
Аннотация: The taxonomic composition, seasonal dynamics, and emergence intensity of chironomid adults (the Chironomidae family) emerging from Oiskoe mountain oligotrophic lake (Western Sayan, Southern Siberia) have been established. The value of the annual emergence of chironomid adults averages 0.42 g wet weight m-2 in the lake area and approaches the value of potential emergence, which is calculated based on the estimate of zoobenthos secondary production. For the first time the fatty-acid composition and contents of essential omega-3 polyunsaturated fatty acids (PUFAs) are compared between the larvae and adult stages of chironomids. The PUFA content per wet weight unit in adults is more than 7 times higher than that in larvae. The PUFA flux per lake area unit resulting from the chironomid emergence amounted to 1.752 mg m-2 y-1, which is over 10 times lower than the global estimate for the emergence of amphibiotic insects. Calculations show that the PUFA flux brought with the chironomid emergence per land unit of the studied mountain territory is very low when compared to that for other landscapes, with the exception of the shoreline part of the territory with a width of 15 m, in which the PUFA flux is comparable to that in productive landscapes. © 2016, Pleiades Publishing, Ltd.

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Держатели документа:
Siberian Federal University, pr. Svobodny 79, Krasnoyarsk, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Borisova, E. V.; Makhutova, O. N.; Gladyshev, M. I.; Sushchik, N. N.

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Export of aquatic productivity, including highly unsaturated fatty acids, to terrestrial ecosystems via Odonata / O. N. Popova [et al.] // Sci. Total Environ. - 2017. - Vol. 581-582. - P40-48, DOI 10.1016/j.scitotenv.2017.01.017 . - ISSN 0048-9697
Кл.слова (ненормированные):
Amphibiotic insect emergence -- Aquatic subsidy -- Docosahexaenoic acid, forest-steppe -- Eicosapentaenoic acid -- Aquatic ecosystems -- Carbon -- Ecology -- Ecosystems -- Forestry -- Organic carbon -- Productivity -- Unsaturated fatty acids -- Amphibiotic insect emergence -- Aquatic subsidy -- Docosahexaenoic acid -- Eicosapentaenoic acid -- Highly unsaturated fatty acids -- Terrestrial ecosystems -- Terrestrial landscape -- Western Siberia , Russia -- Fatty acids -- Animalia -- Aves -- Hexapoda -- Odonata
Аннотация: Based on 31-year field study of the abundance and biomass of 18 species of odonates in the Barabinsk Forest–Steppe (Western Siberia, Russia), we quantified the contribution of odonates to the export of aquatic productivity to surrounding terrestrial landscape. Emergence varied from 0.8 to 4.9 g of wet biomass per m2 of land area per year. Average export of organic carbon was estimated to be 0.30 g·m? 2·year? 1, which is comparable with the average production of herbivorous terrestrial insects in temperate grasslands. Moreover, in contrast to terrestrial insects, emerging odonates contained high quantities of highly unsaturated fatty acids (HUFA), namely eicosapentaenoic acid (20:5n-3, EPA), and docosahexaenoic acid (22:6n-3, DHA), which are known to be essential for many terrestrial animals, especially for birds. The export of EPA + DHA by odonates was found to be 1.92–11.76 mg·m? 2·year? 1, which is equal to an average general estimation of the export of HUFA by emerging aquatic insects. Therefore, odonates appeared to be a quantitatively and qualitatively important conduit of aquatic productivity to forest-steppe ecosystem. © 2017 Elsevier B.V.

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Держатели документа:
Institute of Systematics and Ecology of Animals of Siberian Branch of Russian Academy of Sciences, Frunze str. 11, Novosibirsk, Russian Federation
Institute of Biophysics of Federal Research Center “Krasnoyarsk Science Center” of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny av. 79, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Popova, O. N.; Haritonov, A. Y.; Sushchik, N. N.; Makhutova, O. N.; Kalachova, G. S.; Kolmakova, A. A.; Gladyshev, M. I.

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Fatty acid composition and content in chironomid species at various life stages dominating in a saline Siberian lake / O. N. Makhutova [et al.] // Contemp. Probl. Ecol. - 2017. - Vol. 10, Is. 3. - P230-239, DOI 10.1134/S1995425517030064 . - ISSN 1995-4255
Кл.слова (ненормированные):
amphibiotic insect emergence -- Chironomidae -- fatty acids -- life stages -- saline lake -- Chironomidae -- Glyptotendipes barbipes -- Hexapoda
Аннотация: This paper studies the fatty acid (FA) composition and content of essential polyunsaturated fatty acids (PUFAs) in the biomass of larvae and adults of chironomids from the saline Shira Lake. Species of different genera significantly differ in their larvae FA composition and essential PUFA content, and they also occupy different ecological niches: Chironomus species with a low PUFA content (0.2–0.3 mg g–1 of wet weight) inhabit a deepwater zone of the lake, while Glyptotendipes barbipes species that were richer in PUFA (2.3 mg g–1 of wet weight) dwell in the littoral of the lake. The biochemical differences are likely related to different feeding spectra of these taxa and can also be explained by the phylogenetic factor. A comparison does not find differences in the PUFA content in larvae and adults in the samples of the same species G. barbipes; i.e., we do not confirm the data on an increase in the content of these acids during the metamorphosis of chironomids. Thus, the data on the PUFA content in larvae can be used in calculations of PUFA fluxes through chironomid emergence from water bodies; however, the taxonomic affiliation of the emerged chironomids should be taken into consideration due to the high variability in the PUFA content in Chironomidae species. © 2017, Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Makhutova, O. N.; Borisova, E. V.; Shulepina, S. P.; Kolmakova, A. A.; Sushchik, N. N.

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Modeling production processes in forest stands: An adaptation of the Solow growth model / V. Soukhovolsky, Y. Ivanova // Forests. - 2018. - Vol. 9, Is. 7, DOI 10.3390/f9070391 . - ISSN 1999-4907
Кл.слова (ненормированные):
Components of phytomass -- Forest stands -- Modeling of growth processes -- Net primary production (NPP) -- Economics -- Needles -- Energy productions -- Forest stand -- Growth process -- Independent model -- Model of economics -- Net primary production -- Phytomass -- Production process -- Forestry -- Hexapoda
Аннотация: The model of forest stand growth proposed in this study is based on R. Solow's model of economic growth. The variables introduced into the model are the "capital" (the phytomass of the non-synthesizing tree components in the stand-the stem, roots, and branches) and the "labor" (the phytomass of the photosynthesizing tree components in the stand-leaves or needles). Root phytomass is calculated with a special independent model. The process of energy production by the trees is described with the Cobb-Douglas equation. The proposed approach is used to describe growth processes in the forest stands comprising various species in Siberia and the age dynamics of net primary production. The model can explain a number of effects (such as death of the forest stand after the needles have been consumed by defoliating insects) that cannot be explained by standard logistic models. © 2018 by the authors.

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Держатели документа:
Sukachev Institute of Forest SB RAS, Federal Research Center 'Krasnoyarsk Science Center SB RAS', Akademgorodok 50-28, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center 'Krasnoyarsk Science Center SB RAS', Akademgorodok 50-50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Soukhovolsky, V.; Ivanova, Y.

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