Life-history trade-offs and limitations associated with phenotypic adaptation under future ocean warming and elevated salinity

Jarrold, Michael D., Chakravarti, Leela J., Gibbin, Emma M., Christen, Félix, Massamba-N'Siala, Gloria, Blier, Pierre Ulrich ORCID: https://orcid.org/0000-0003-1881-2421 et Calosi, Piero ORCID: https://orcid.org/0000-0003-3378-2603 (2019). Life-history trade-offs and limitations associated with phenotypic adaptation under future ocean warming and elevated salinity. Philosophical Transactions of the Royal Society B, 374 (1768).

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Résumé

Little is known about the life-history trade-offs and limitations, and the physiological mechanisms that are associated with phenotypic adaptation to future ocean conditions. To address this knowledge gap, we investigated the within- and trans-generation life-history responses and aerobic capacity of a marine polychaete, Ophryotrocha labronica, to elevated temperature and elevated temperature combined with elevated salinity for its entire lifespan. In addition, transplants between treatments were carried out at both the egg mass and juvenile stage to identify the potential influence of developmental effects. Within-generation, life-history trade-offs caused by the timing of transplant were only detected under elevated temperature combined with elevated salinity conditions. Polychaetes transplanted at the egg mass stage grew slower and had lower activities of energy metabolism enzymes but reached a larger maximum body size and lived longer when compared with those transplanted as juveniles. Trans-generation exposure to both elevated temperature and elevated temperature and salinity conditions restored 20 and 21% of lifespan fecundity, respectively. Trans-generation exposure to elevated temperature conditions also resulted in a trade-off between juvenile growth rates and lifespan fecundity, with slower growers showing greater fecundity. Overall, our results suggest that future ocean conditions may select for slower growers. Furthermore, our results indicate that life-history trade-offs and limitations will be more prevalent with the shift of multiple global change drivers, and thus there will be greater constraints on adaptive potential.

This article is part of the theme issue ‘The role of plasticity in phenotypic adaptation to rapid environmental change’. -- Keywords : natural selection ; fecundity ; aerobic capacity ; adaptive phenotypic plasticity ; longevity ; costs.

Type de document :	Article
Validation par les pairs :	Oui
Information complémentaire :	CC BY 4.0
Version du document déposé :	Post-print (version corrigée et acceptée)
Départements et unités départementales :	Département de biologie, chimie et géographie
Déposé par :	DIUQAR UQAR
Date de dépôt :	14 juin 2023 12:54
Dernière modification :	02 oct. 2023 16:03
URI :	https://semaphore.uqar.ca/id/eprint/2340

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