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, Christen, Felix, Massamba-N'Siala, Gloria, Blier, Pierre U., and Calosi, Piero (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: Biological Sciences, 374 (1768).

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Abstract

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.

Item ID: 57740
Item Type: Article (Research - C1)
ISSN: 1471-2970
Keywords: adaptive phenotypic plasticity, natural selection, costs, aerobic capacity, longevity, fecundity
Copyright Information: (C) 2019 The Author(s) Published by the Royal Society. All rights reserved
Funders: Natural Sciences and Engineering Research Council of Canada (NSERC), Fonds de Recherche du Québec (FRQ), Université du Québec à Rimouski, European Union (EU)
Projects and Grants: NSERC RGPIN-2015-06500, FRQ 199173, NSERC RGPIN 155926, EU Marie Sklodowska-Curie grant agreement no. 659359
Date Deposited: 27 Mar 2019 07:40
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960301 Climate Change Adaptation Measures @ 100%
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