Impacts of ocean acidification and warming on post-larval growth and metabolism in two populations of the great scallop ( Pecten maximus )

• Published in: Journal of Experimental Biology
• Main Authors: Harney, Ewan, Rastrick, Samuel, Artigaud, Sebastien, Pisapia, Julia, Bernay, Benoit, Miner, Philippe, Pichereau, Vianney, Strand, Øivind, Boudry, Pierre, Charrier, Gregory
• Other Authors: Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute of Marine Research Bergen (IMR), University of Bergen (UiB), Interactions Cellules Organismes Environnement (ICORE), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Tumorothèque de Caen Basse-Normandie (TCBN), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Regional Council of Brittany, ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2023
• Subjects: [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry; Molecular Biology/Genomics [q-bio.GN]; Norway; Ocean acidification
• Online Access: https://hal.univ-brest.fr/hal-04172272; https://doi.org/10.1242/jeb.245383

International audience ABSTRACT Ocean acidification and warming are key stressors for many marine organisms. Some organisms display physiological acclimatization or plasticity, but this may vary across species ranges, especially if populations are adapted to local climatic conditions. Understanding how acclimatization potential varies among populations is therefore important in predicting species responses to climate change. We carried out a common garden experiment to investigate how different populations of the economically important great scallop (Pecten maximus) from France and Norway responded to variation in temperature and PCO2 concentration. After acclimation, post-larval scallops (spat) were reared for 31 days at one of two temperatures (13°C or 19°C) under either ambient or elevated PCO2 (pH 8.0 and pH 7.7). We combined measures of proteomic, metabolic and phenotypic traits to produce an integrative picture of how physiological plasticity varies between the populations. The proteome of French spat showed significant sensitivity to environmental variation, with 12 metabolic, structural and stress-response proteins responding to temperature and/or PCO2. Principal component analysis revealed seven energy metabolism proteins in French spat that were consistent with countering ROS stress under elevated temperature. Oxygen uptake in French spat did not change under elevated temperature but increased under elevated PCO2. In contrast, Norwegian spat reduced oxygen uptake under both elevated temperature and PCO2. Metabolic plasticity allows French scallops to maintain greater energy availability for growth compared with Norwegian spat. However, increased physiological plasticity and growth in French spat may come at a cost, as they showed reduced survival compared with Norwegian scallops under elevated temperature.