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Effects of ocean warming on the fatty acid and epigenetic profile of Acartia tonsa: A multigenerational approach
Janssens, L.; Asselman, J.; De Troch, M. (2024). Effects of ocean warming on the fatty acid and epigenetic profile of Acartia tonsa: A multigenerational approach. Mar. Pollut. Bull. 201: 116265. https://dx.doi.org/10.1016/j.marpolbul.2024.116265
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363
Related to:
Janssens, L.; Asselman, J.; De Troch, M. (2024). Corrigendum to “Effects of ocean warming on the fatty acid and epigenetic profile of Acartia tonsa: A multigenerational approach.” [Mar. Pollut. Bull. Volume 201, April 2024, 116265]. Mar. Pollut. Bull. 205: 116545. https://dx.doi.org/10.1016/j.marpolbul.2024.116545, more
Peer reviewed article  
Available in  Authors 
Keywords
    Climate change
    Heat stress
    Copepoda [WoRMS]
    Marine/Coastal
Author keywords
    DNA methylation; Docosahexaenoic acid; Crustaceans
Authors  Top 
  • Janssens, L.
  • Asselman, J.
  • De Troch, M.
Abstract
    The effects of climate change are becoming more prevalent, and it is important to know how copepods, the most abundant class in zooplankton, will react to changing temperatures as they are the main food source for secondary consumers. They act as key transferers of nutrients from primary producers to organisms higher up the food chain. Little is known about the effects of temperature changes on copepods on the long term, i.e., over several generations. Especially the epigenetic domain seems to be understudied and the question remains whether the nutritional value of copepods will permanently change with rising water temperatures. In this research, the effects of temperature on the fatty acid and epigenetic profiles of the abundant planktonic copepod Acartia tonsa were investigated, since we expect to see a link between these two. Indeed, changing methylation patterns helped copepods to deal with higher temperatures, which is in line with the relative abundance of the most important fatty acids, e.g., DHA. However, this pattern was only observed when temperature increased slowly. A sudden increase in temperature showed the opposite effect; Acartia tonsa did not show deviant methylation patterns and the relative abundance of DHA and other important fatty acids dropped significantly after several generations. These results suggest that local fluctuations in temperature have a greater effect on Acartia tonsa than an elevation of the global mean.
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