Seasonal changes in the accumulation of polyunsaturated fatty acids in zooplankton

Hartwich, Melanie; Martin-Creuzburg, Dominik; Wacker, Alexander

Seasonal changes in the accumulation of polyunsaturated fatty acids in zooplankton

Dateien

Hartwich_215314.pdfGröße: 6.03 MBDownloads: 1007

Datum

2012

Autor:innen

Hartwich, Melanie

Martin-Creuzburg, Dominik

Wacker, Alexander

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Plankton Research. 2012, 35(1), pp. 121-134. ISSN 0142-7873. eISSN 1464-3774. Available under: doi: 10.1093/plankt/fbs078

Zusammenfassung

In aquatic food webs, consumers, such as daphnids and copepods, differ regarding their accumulation of polyunsaturated fatty acids (PUFAs). We tested if the accumulation of PUFAs in a seston size fraction containing different consumers and in Daphnia as a separate consumer is subject to seasonal changes in a large deep lake due to changes in the dietary PUFA supply and specific demands of different consumers. We found that the accumulation of arachidonic acid (ARA) in Daphnia increased from early summer to late summer and autumn. However, ARA requirements of Daphnia appeared to be constant throughout the year, because the accumulation of ARA increased when the dietary ARA supply decreased. In the size fraction .140 mm, we found an increased accumulation of docosahexaenoic acid (DHA) during late summer and autumn. These seasonal changes in DHA accumulation were linked to changes in the proportion of copepods in this size fraction, which may have increasingly accumulated DHA for active overwintering. We show that consumer-specific PUFA demands can result in seasonal changes in PUFA accumulation, which may influence the trophic transfer of PUFAs within the food web.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

accumulation, Daphnia, copepods, ARA, DHA

Zitieren

ISO 690

HARTWICH, Melanie, Dominik MARTIN-CREUZBURG, Alexander WACKER, 2012. Seasonal changes in the accumulation of polyunsaturated fatty acids in zooplankton. In: Journal of Plankton Research. 2012, 35(1), pp. 121-134. ISSN 0142-7873. eISSN 1464-3774. Available under: doi: 10.1093/plankt/fbs078

BibTex

@article{Hartwich2012Seaso-21531,
  year={2012},
  doi={10.1093/plankt/fbs078},
  title={Seasonal changes in the accumulation of polyunsaturated fatty acids in zooplankton},
  number={1},
  volume={35},
  issn={0142-7873},
  journal={Journal of Plankton Research},
  pages={121--134},
  author={Hartwich, Melanie and Martin-Creuzburg, Dominik and Wacker, Alexander}
}

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Universitätsbibliographie

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