Lipid remodelling in the reef-building honeycomb worm, Sabellaria alveolata, reflects acclimation and local adaptation to temperature
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Muir et al_Local adaptation and ...
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University of Chester; Ifremer Centre Bretagne; Ifremer Centre Bretagne; Ifremer Centre BretagnePublication Date
2016-10-20
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Acclimation and adaptation, which are key to species survival in a changing climate, can be observed in terms of membrane lipid composition. Remodelling membrane lipids, via homeoviscous adaptation (HVA), counteracts membrane dysfunction due to temperature in poikilotherms. In order to assess the potential for acclimation and adaptation in the honeycomb worm, Sabellaria alveolata, a reefbuilding polychaete that supports high biodiversity, we carried out common-garden experiments using individuals from along its latitudinal range. Individuals were exposed to a stepwise temperature increase from 15 °C to 25 °C and membrane lipid composition assessed. Our results suggest that S. alveolata was able to acclimate to higher temperatures, as observed by a decrease in unsaturation index and 20:5n-3. However, over the long-term at 25 °C, lipid composition patterns are not consistent with HVA expectations and suggest a stress response. Furthermore, unsaturation index of individuals from the two coldest sites were higher than those from the two warmest sites, with individuals from the thermally intermediate site being in-between, likely reflecting local adaptation to temperature. Therefore, lipid remodelling appears limited at the highest temperatures in S. alveolata, suggesting that individuals inhabiting warm environments may be close to their upper thermal tolerance limits and at risk in a changing climate.Citation
Muir, A. P., Nunes, F. L. D., Dubois, S. F., & Pernet, F. (2016). Lipid remodelling in the reef-building honeycomb worm, Sabellaria alveolata, reflects acclimation and local adaptation to temperature. Scientific Reports, 6, 35669. doi: 10.1038/srep35669Publisher
Nature Publishing GroupJournal
Scientific ReportsAdditional Links
http://www.nature.com/articles/srep35669Type
ArticleLanguage
enISSN
2045-2322EISSN
2045-2322ae974a485f413a2113503eed53cd6c53
10.1038/srep35669
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