Inter- and intraspecific differences in rotifer fatty acid composition during acclimation to low-quality food

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2020
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Schälicke, Svenja
Heim, Silvia
Wacker, Alexander
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Philosophical Transactions of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2020, 375(1804), 20190644. ISSN 0962-8436. eISSN 1471-2970. Available under: doi: 10.1098/rstb.2019.0644
Zusammenfassung

Biochemical food quality constraints affect the performance of consumers and mediate trait variation among and within consumer species. To assess inter- and intraspecific differences in fatty acid retention and conversion in freshwater rotifers, we provided four strains of two closely related rotifer species, Brachionus calyciflorus sensu stricto and Brachionus fernandoi, with food algae differing in their fatty acid composition. The rotifers grazed for 5 days on either Nannochloropsis limnetica or Monoraphidium minutum, two food algae with distinct polyunsaturated fatty acid (PUFA) profiles, before the diets were switched to PUFA-free Synechococcus elongatus, which was provided for three more days. We found between- and within-species differences in rotifer fatty acid compositions on the respective food sources and, in particular, highly specific acclimation reactions to the PUFA-free diet. The different reactions indicate inter- but also intraspecific differences in physiological traits, such as PUFA retention, allocation and bioconversion capacities, within the genus Brachionus that are most likely accompanied by differences in their nutritional demands. Our data suggest that biochemical food quality constraints act differently on traits of closely related species and of strains of a particular species and thus might be involved in shaping ecological interactions and evolutionary processes. This article is part of the theme issue 'The next horizons for lipids as 'trophic biomarkers': evidence and significance of consumer modification of dietary fatty acids'.

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570 Biowissenschaften, Biologie
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fatty acids, Brachionus, food quality, trait variation, rotifer strains, PUFA composition
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ISO 690SCHÄLICKE, Svenja, Silvia HEIM, Dominik MARTIN-CREUZBURG, Alexander WACKER, 2020. Inter- and intraspecific differences in rotifer fatty acid composition during acclimation to low-quality food. In: Philosophical Transactions of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2020, 375(1804), 20190644. ISSN 0962-8436. eISSN 1471-2970. Available under: doi: 10.1098/rstb.2019.0644
BibTex
@article{Schalicke2020-08-03Inter-50105,
  year={2020},
  doi={10.1098/rstb.2019.0644},
  title={Inter- and intraspecific differences in rotifer fatty acid composition during acclimation to low-quality food},
  number={1804},
  volume={375},
  issn={0962-8436},
  journal={Philosophical Transactions of the Royal Society of London, Series B : Biological Sciences},
  author={Schälicke, Svenja and Heim, Silvia and Martin-Creuzburg, Dominik and Wacker, Alexander},
  note={Article Number: 20190644}
}
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