Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1002/lno.12763 |
| Volltext | Shareable Link |
| Titel (primär) | Temperature, pH, and diet interactively affect biosynthesis of polyunsaturated fatty acids in a benthic harpacticoid copepod |
| Autor | Boyen, J.; Rodríguez, M.T.; Vlaeminck, B.; Fink, P.
; Hablützel, P.I.; De Troch, M. |
| Quelle | Limnology and Oceanography |
| Erscheinungsjahr | 2025 |
| Department | ASAM; FLOEK |
| Band/Volume | 70 |
| Heft | 2 |
| Seite von | 334 |
| Seite bis | 348 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Supplements | Supplement 1 |
| Abstract | Greenhouse gas emissions lead to ocean warming and acidification, negatively impacting marine organisms and their functioning, including long-chain polyunsaturated fatty acid (LC-PUFA) production by marine microalgae. Copepods, primary consumers of microalgae, possess a unique capacity for endogenous LC-PUFA biosynthesis, possibly enabling them to cope with reduced dietary LC-PUFA availabilities. However, this capacity may be itself impacted by changing oceanographic conditions. In this study, we conducted a laboratory experiment to evaluate the combined effects of warming (+3°C), acidification (−0.4 pH), and dietary LC-PUFA deficiency on the fatty acid composition and LC-PUFA biosynthesis (measured by quantitative RT-PCR) of the benthic harpacticoid copepod Platychelipus littoralis (Brady, 1880). We hypothesized increased LC-PUFA biosynthesis under all drivers compensating for LC-PUFA reductions. Lipid profiles of copepods exposed to multiple stressors contained shorter-chained and more saturated fatty acids. While copepods maintained base-line relative concentrations of the physiologically important LC-PUFA docosahexaenoic acid (DHA) on an LC-PUFA deficient diet at ambient temperatures, DHA concentrations decreased significantly with higher temperatures. Expression of the DHA biosynthesis genes Δ4 front-end desaturase and elovl1a increased under dietary LC-PUFA deficiency but did not exceed base-line levels when simultaneously exposed to acidification. Expression of Δ4 front-end desaturase and multiple elongases correlated positively with C18 precursor concentrations and negatively with those of LC-PUFAs such as DHA, indicating their role as LC-PUFA biosynthesis enzymes. Overall, our findings suggest that ocean warming and acidification may impede benthic copepods' LC-PUFA biosynthesis capacity under reduced dietary inputs, limiting their contribution toward global LC-PUFA availability for higher trophic levels. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30223 |
| Boyen, J., Rodríguez, M.T., Vlaeminck, B., Fink, P., Hablützel, P.I., De Troch, M. (2025): Temperature, pH, and diet interactively affect biosynthesis of polyunsaturated fatty acids in a benthic harpacticoid copepod Limnol. Oceanogr. 70 (2), 334 - 348 10.1002/lno.12763 |
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