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Feeding spectra of Arctodiaptomus salinus (Calanoida, Copepoda) using fatty acid trophic markers in seston food in two salt lakes in South Siberia (Khakasia, Russia) / A. P. Tolomeev [et al.] // Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - P513-530, DOI 10.1007/s10452-010-9331-y . - ISSN 1386-2588
Кл.слова (ненормированные):
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.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny av. 79, 660041 Krasnoyarsk, Russian Federation
Netherlands Institute of Ecology, Department of Aquatic Ecology, Rijksstraatweg 6, 3631 AC Nieuwersluis, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tolomeev, A.P.; Sushchik, N.N.; Gulati, R.D.; Makhutova, O.N.; Kalacheva, G.S.; Zotina, T.A.

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Cryptophyta Flagellates of Meromictic Lakes Shira and Shunet (Khakassia, Russia): Mechanisms of Vertical Distribution and Trophic Role [Text] / Y. Barkhatov [et al.] // Acta Geol. Sin.-Engl. Ed. - 2014. - Vol. 88. - P50-52, DOI 10.1111/1755-6724.12266_4. - Cited References:9. - This work was supported by Russian Foundation for Basic Research (RFBR)No. 13-04-01514 and Integrative Project of Siberian Branch of RussianAcademy of Sciences No. 56. . - ISSN 1000-9515. - ISSN 1755-6724

РУБ Geosciences, Multidisciplinary
Рубрики:
CHEMOCLINE
SIBERIA
SALINE
Кл.слова (ненормированные):
phytoflagellates -- deep chlorophyll maxima -- meromictic lake -- simulation -- modelling -- LakeShira -- LakeShunet

WOS
Держатели документа:
Inst Biophys SB RAS, Krasnoyarsk 660036, Russia.
ИБФ СО РАН

Доп.точки доступа:
Barkhatov, Yuri; Khromechek, Elena; Tolomeev, Alexander; Prokopkin, Igor; Russian Foundation for Basic Research (RFBR) [13-04-01514]; SiberianBranch of Russian Academy of Sciences [56]

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