Stable isotope fractionation of fatty acids of Daphnia fed laboratory cultures of microalgae

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1016/j.limno.2015.12.001

Ключевые слова: Fatty acids, Compound-specific isotope analysis, Stable isotope fractionation, Food webs, comparative study, crustacean, fatty acid, food web, isotopic analysis, isotopic fractionation, microalga, stable isotope, Chlorella vulgaris, Cryptomonas sp., Daphnia, Daphnia galeata

Аннотация: 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%0 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. (C) 2015 Elsevier GmbH. All rights reserved.

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Выпуск журнала: Vol. 56

Номера страниц: 23-29

ISSN журнала: 00759511

Место издания: JENA



  • Gladyshev M.I. (Siberian Federal University)
  • Makhutova O.N. (Institute of Biophysics of Siberian Branch of Russian Academy of Sciences)
  • Kravchuk E.S. (Institute of Biophysics of Siberian Branch of Russian Academy of Sciences)
  • Anishchenko O.V. (Institute of Biophysics of Siberian Branch of Russian Academy of Sciences)
  • Sushchik N.N. (Siberian Federal University)

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