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    Waterbugs (Heteroptera: Nepomorpha and Gerromorpha) as sources of essential n-3 polyunsaturated fatty acids in Central Siberian ecoregions [Text] / N. N. Sushchik [et al.] // Freshw. Biol. - 2016. - Vol. 61, Is. 10. - P1787-1801, DOI 10.1111/fwb.12818. - Cited References:77. - The work was supported by award no. 13-04-00860 from the Russian Foundation for Basic Research and by the Russian Federal Tasks of Fundamental Research (projects no. 51.1.1 and VI.51.1.9). The research was partially supported by grant NSh-9249.2016.5 from the President of the Russian Federation. . - ISSN 0046-5070. - ISSN 1365-2427
РУБ Marine & Freshwater Biology
Рубрики:
FRESH-WATER
   TERRESTRIAL ECOSYSTEMS

   BUGS HETEROPTERA

   AQUATIC INSECTS

Кл.слова (ненормированные):
essential fatty acids -- Heteroptera -- subsidies -- terrestrial consumers -- waterbugs -- water-land transfers
Аннотация: 1. Aquatic systems are considered to be a main source of essential long-chain n-3 polyunsaturated fatty acids (PUFA), which are preferentially synthesized by microalgae and transferred along food chains to terrestrial consumers. Emerging aquatic insects comprise a significant part of this transfer of the essential PUFA from water to land. Quantitative data on PUFA content and composition are available mainly for rheophilic insects while taxa that are characteristic of wetlands and stagnant water bodies, such as aquatic Heteroptera, remain relatively unstudied. 2. We investigated the role of various waterbug taxa (Heteroptera: Nepomorpha and Gerromorpha) inhabiting different ecoregions in temperate Central Siberia (Russia) as potential sources of PUFA. The ecoregions were steppe, forest-steppe, hemiboreal forest and montane coniferous forest. Although these waterbugs insects are aquatic in both larval and adult stages, they can disperse through the landscape and transfer essential PUFAs from water to land so making them potentially available to terrestrial consumers. 3. Species of Naucoridae, Notonectidae and Corixidae were generally dominant in all ecoregions, attaining maximum biomass in the steppe. We showed that habitat or ecoregion played a major role in the variability of fatty acid composition of Notonectidae and Gerridae but not Corixidae. In contrast, the biochemical composition of the only naucoridae, Ilyocoris cimicoides, was largely affected by life stage. 4. Both the dominant families and species within them differed with respect to their mass-specific contents of essential long-chain PUFA of the n-3 family, namely eicosapentaenoic and docosahexaenoic acids. Corixid species had the highest content of these two essential PUFAs among the waterbug studies, and relative to literature reports for other aquatic insects. Corixids thus appear to be a potentially important vector for transfer of the essential biochemical compounds from water to land, especially in steppe ecoregions with numerous ephemeral water bodies.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Inst Systemat & Ecol Anim, Novosibirsk, Russia.
Tomsk State Univ, Inst Biol Ecol Soil Agr & Forest Sci, Tomsk, Russia.

Доп.точки доступа:
Sushchik, Nadezhda N.; Yurchenko, Yuri A.; Belevich, Olga E.; Kalachova, Galina S.; Kolmakova, Anzhelika A.; Gladyshev, Michail I.; Russian Foundation for Basic Research [13-04-00860]; Russian Federal Tasks of Fundamental Research [51.1.1, VI.51.1.9]; Russian Federation [NSh-9249.2016.5]

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2.


   
    Preliminary estimation of the export of omega-3 polyunsaturated fatty acids from aquatic to terrestrial ecosystems in biomes via emergent insects / M. I. Gladyshev, E. E. Gladysheva, N. N. Sushchik // Ecol. Complex. - 2019. - Vol. 38. - P140-145, DOI 10.1016/j.ecocom.2019.03.007. - Cited References:84. - The work was supported by the project of Siberian Federal University, carried out according to Federal Tasks of Ministry of Education and Science of the Russian Federation No. 6.1504.2017/PCh and by Russian Federal Tasks of Fundamental Research (project No. 51.1.1). We are grateful to two anonymous Reviewers for their kind help to significantly improve the manuscript. . - ISSN 1476-945X. - ISSN 1476-9840
РУБ Ecology
Рубрики:
BENTHIC SECONDARY PRODUCTION
   RECIPROCAL SUBSIDIES

   FRESH-WATER

Кл.слова (ненормированные):
Eicosapentaenoic acid -- Docosahexaenoic acid -- Aquatic-terrestrial -- subsidies -- Food quality -- Water/land area ratio
Аннотация: Some terrestrial consumers may be limited by food quality, namely by contents of essential polyunsaturated fatty acids (PUFA), eicosapentaenoic acid (20:5n - 3, EPA) and docosahexaenoic acid (22:6n - 3, DHA) in their food. Since EPA and DHA are mainly produced in aquatic ecosystems, for future estimating of the potential limitation by food quality in global scale, the water-land fluxes of these PUFA with the biomass of emergent aquatic insects in several biomes were calculated. The water /land area ratios for each biome were calculated by dividing the water area of each biome by its terrestrial area. Data on insect emergence from water bodies (g of dry mass m(-2) year(-1)), were summarized and averaged for each biome. From available data, EPA and DHA contents (mg g(-1) dry mass), in the biomass of emergent aquatic insects were calculated first so that annual fluxes of PUFA to land area via aquatic insect emergence could be estimated for each biome. PUFA fluxes occurred between the biomes, ranging from 0.04 to 4.39 mg m(-2) year(-1). In this study, the aquatic PUFA supply to land area appeared to be significantly lower than estimated earlier. This suggests that terrestrial consumers may experience food quality limitations mediated by shortage of PUFA compounds.

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Держатели документа:
Siberian Fed Univ, Svobodny Av 79, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Biophys, Fed Res Ctr, Krasnoyarsk Sci Ctr,Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Gladyshev, Michail, I; Gladysheva, Elena E.; Sushchik, Nadezhda N.; Siberian Federal University [6.1504.2017/PCh]; Russian Federal Tasks of Fundamental Research [51.1.1]

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