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Gladyshev, M. I.
Makhutova, O. N.
Kravchuk, E. S.
Anishchenko, O. V.
Sushchik, N. N.
Gladyshev, M. I. Stable isotope fractionation of fatty acids of Daphnia fed laboratory cultures of microalgae [Текст] / M. I. Gladyshev, O. N. Makhutova, E. S. Kravchuk, O. V. Anishchenko, N. N. Sushchik // Limnologica. — 2016. — Т. 56. — С. 23-29
We tested a comparatively new method of tracing of natural food webs, compound-specific isotope analysis (CSIA) of fatty acids (FA), using laboratory culture of Daphnia galeata fed Chlorella vulgaris and Cryptomonas sp. In general, Daphnia had significantly lighter carbon stable isotope composition of most fatty acids, including essential, than those of their food, microalgae. Thus, our results did not support the pivotal premise of the FA-CSIA application for food web analysis, i.e., transmitting the isotope ‘signal’ of essential FAs to consumers from their food without any modification. Moreover, the values of isotope fractionation of particular FAs in the consumer relative to its food were not constant, but varied from 1.35‰ to 7.04‰. The different isotope fractionation (depletion) values of diverse FAs in consumer were probably caused by different processes of their synthesis, catabolism and assimilation. More work is evidently to be done for correct interpretation of results of FA-CSIA during field studies for tracing of natural food webs.
fatty acids
сompound-specific isotope analysis
stable isotope fractionation
food webs
Stable isotope fractionation of fatty acids of Daphnia fed laboratory cultures of microalgae
Journal Article
Journal Article Preprint
Институт фундаментальной биологии и биотехнологии
Кафедра водных и наземных экосистем

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