Trophic upgrading of picocyanobacterial carbon by ciliates for nutrition of Daphnia magna

Martin-Creuzburg, Dominik; Bec, Alexandre; Elert, Eric

Trophic upgrading of picocyanobacterial carbon by ciliates for nutrition of Daphnia magna

Dateien

2005_Creuzburg_et_al_Trophic_upgrading_of_picocyanobacterial.pdfGröße: 162.77 KBDownloads: 288

Datum

2005

Autor:innen

Martin-Creuzburg, Dominik

Bec, Alexandre

Elert, Eric

URI (zitierfähiger Link)

http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-60857

Link zur Lizenz

Attribution-NonCommercial-NoDerivs 2.0 Generic

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Aquatic Microbial Ecology. 2005, 41(3), pp. 271-280. ISSN 0948-3055. eISSN 1616-1564

Zusammenfassung

Unicellular picocyanobacteria, such as species of the genus Synechococcus, are unsuitable for supporting growth and reproduction of Daphnia spp. In Synechococcus spp., long-chain polyunsaturated fatty acids (PUFAs) and sterols are absent, which leads to a low carbon transfer efficiency at the picocyanobacteria Daphnia spp. interface. Herein, we address the question as to whether ciliates can serve as a trophic link between picocyanobacterial production and Daphnia spp. production, thereby upgrading the nutritional value of a picocyanobacterial food source by producing essential lipids such as PUFAs or sterols. In simplified experimental food chains consisting of 1 of 2 different Synechococcus strains, the ciliates Colpidium campylum or Cyclidium sp., and D. magna, we provided evidence that predation on ciliates by Daphnia spp. allows access to picocyanobacterial production. Since daphnids are primarily sterol-limited when grown on the picocyanobacteria Synechococcus spp., the observed trophic upgrading of Synechococcus food-quality by intermediary ciliates is most probably due to the addition of sterols or sterol-like compounds that (at least partly) release Daphnia spp. from sterol limitation. The absence of sterols in the ciliates used in the present 5study suggests that tetrahymanol and/or hopanoids provide functional equivalents of sterols not only in ciliates but also in Daphnia spp., thereby leading to enhanced growth of the cladocerans.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

limnologicalinstitute, Synechococcus spp., Colpidium campylum, Cyclidium spp., Sterols, Tetrahymanol, Hopanoids

Zitieren

ISO 690

MARTIN-CREUZBURG, Dominik, Alexandre BEC, Eric ELERT, 2005. Trophic upgrading of picocyanobacterial carbon by ciliates for nutrition of Daphnia magna. In: Aquatic Microbial Ecology. 2005, 41(3), pp. 271-280. ISSN 0948-3055. eISSN 1616-1564

BibTex

@article{MartinCreuzburg2005Troph-7685,
  year={2005},
  title={Trophic upgrading of picocyanobacterial carbon by ciliates for nutrition of Daphnia magna},
  number={3},
  volume={41},
  issn={0948-3055},
  journal={Aquatic Microbial Ecology},
  pages={271--280},
  author={Martin-Creuzburg, Dominik and Bec, Alexandre and Elert, Eric}
}

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Universitätsbibliographie

Ja