Warming and acidification-mediated resilience to bacterial infection determine mortality of early Ostrea edulis life stages

dc.contributor.authorPrado, Patricia
dc.contributor.authorRoque, Ana
dc.contributor.authorPérez, Josu
dc.contributor.authorIbáñez, Carles
dc.contributor.authorAlcaraz, Carles
dc.contributor.authorCasals i Martí, Frederic
dc.contributor.authorCaiola, Nuno
dc.date.accessioned2024-02-01T12:25:41Z
dc.date.available2024-02-01T12:25:41Z
dc.date.issued2016-03
dc.description.abstractThe combined effects of temperature and seawater acidification were investigated across larval stages of the European flat oyster Ostrea edulis, from veliger sizes released by gravid individuals to spat. Simultaneous experiments were also conducted to investigate the potential effects of reduced pH levels on bacterial growth that could provide a more comprehensive understanding of the effects of seawater acidification on larval mortality. Larvae (veliger, umbonate, and pediveliger) and spat were exposed to 4 temperatures (18, 22, 26, and 30°C) and 4 pH treatments (7.83-7.92 [ambient], low-reduced, medium-reduced, and high-reduced), and the 4 pH treatments were also used in bacterial experiments. Results showed increased larval mortalities at 30°C (by ca. 49 and 44% in veliger and umbonate stages, respectively), although there was also a bottleneck in pediveligers from 22 to 30°C and no effects on spat. In contrast, the survival of veligers increased with pH reductions by ca. 26%, and was marginally increased in pediveligers despite high mortality at this stage. No shell malformations were observed at any larval stage or in spat, and growth patterns tended to mirror those of survival. This coincided with lower bacterial growth, particularly of Vibrio spp., in the 2 lowest pH treatments, suggesting that seawater acidification may help to prevent bacterial pathogenicity in O. edulis larvae. Compared to available information on the vulnerability of other commercial bivalves to ocean acidification, our results suggest that O. edulis could be a more resilient species; however, further research is needed to investigate the potential effects on gravid females and sperm.
dc.description.sponsorshipThis research was funded by an INIA project (RTA2012-00027-00-00) from the Spanish Ministry of Agriculture and the Fondo Europeo de Desarrollo Regional (FEDER, Project no. RTA 2009-0048-00-00). C.A. held a postdoctoral fellowship from the Spanish National Institute for Agricultural and Food Research and Technology (INIA). We are grateful to IRTA technician N. Gras for assistance with bacterial cultures, and to L. Jornet and D. Mateu for help with preparation of treatment conditions of pH and temperature. We also thank Dr. Francesca Carella for critical revision of the work.
dc.identifier.doihttps://doi.org/10.3354/meps11618
dc.identifier.idgrec026590
dc.identifier.issn0171-8630
dc.identifier.urihttps://repositori.udl.cat/handle/10459.1/464954
dc.language.isoeng
dc.publisherInter Research
dc.relationinfo:eu-repo/grantAgreement/MINECO//RTA2012-00027-00-00/ES/Anticipando efectos potenciales del cambio global sobre la producción pesquera: aumento de temperatura y acidificación del medio marino/
dc.relationinfo:eu-repo/grantAgreement/MICINN//RTA2009-0048-00-00/ES/
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.3354/meps11618
dc.relation.ispartofMarine Ecology Progress Series, 2016, vol 545, p. 189-202
dc.rights(c) Inter Research, 2016
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectClimate change
dc.subjectCalcification
dc.subjectCO2
dc.subjectOcean acidification
dc.subjectBacterial growth
dc.subjectOyster larvae
dc.subjectMediterranean
dc.titleWarming and acidification-mediated resilience to bacterial infection determine mortality of early Ostrea edulis life stages
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
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