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Can trans-generational experiments be used to enhance species resilience to ocean warming and acidification?


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Chakravarti, Leela J., Jarrold, Michael D., Gibbin, Emma M., Christen, Félix, Massamba-N'Siala, Gloria, Blier, Pierre Ulrich ORCID logoORCID: et Calosi, Piero ORCID logoORCID: (2016). Can trans-generational experiments be used to enhance species resilience to ocean warming and acidification? Evolutionary Applications, 9 (9). pp. 1133-1146.

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Human-assisted, trans-generational exposure to ocean warming and acidification has been proposed as a conservation and/or restoration tool to produce resilient offspring. To improve our understanding of the need for and the efficacy of this approach, we characterized life-history and physiological responses in offspring of the marine polychaete Ophryotrocha labronica exposed to predicted ocean warming (OW: + 3°C), ocean acidification (OA: pH −0.5) and their combination (OWA: + 3°C, pH −0.5), following the exposure of their parents to either control conditions (within-generational exposure) or the same conditions (trans-generational exposure). Trans-generational exposure to OW fully alleviated the negative effects of within-generational exposure to OW on fecundity and egg volume and was accompanied by increased metabolic activity. While within-generational exposure to OA reduced juvenile growth rates and egg volume, trans-generational exposure alleviated the former but could not restore the latter. Surprisingly, exposure to OWA had no negative impacts within- or trans-generationally. Our results highlight the potential for trans-generational laboratory experiments in producing offspring that are resilient to OW and OA. However, trans-generational exposure does not always appear to improve traits and therefore may not be a universally useful tool for all species in the face of global change. -- Keywords : acclimation ; climate change ; conservation ; global change ; parental effects ; phenotypic plasticity ; restoration ; selection.

Type de document : Article
Validation par les pairs : Oui
Information complémentaire : CC BY
Version du document déposé : Version officielle de l'éditeur
Départements et unités départementales : Département de biologie, chimie et géographie
Déposé par : DIUQAR UQAR
Date de dépôt : 05 avr. 2023 14:26
Dernière modification : 02 oct. 2023 16:06

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