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Marine Ecology Progress Series

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MEPS 454:65-74 (2012)  -  DOI:

Tolerance of juvenile Mytilus galloprovincialis to experimental seawater acidification

Mª José Fernández-Reiriz1,*, Pedro Range2, Xosé Antón Álvarez-Salgado1, Joaquin Espinosa3, Uxio Labarta1

1Consejo Superior de Investigaciones Científicas, Instituto de Investigaciones Marinas (CSIC-IIM), Eduardo Cabello 6, 36208 Vigo, Spain
2Centro de Ciências do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
3Universidad de Santiago de Compostela, Departamento de Fisiología, Facultad de Farmacia, Santiago de Compostela, Spain

ABSTRACT: Coastal ocean acidification is expected to interfere with the physiology of marine bivalves. In this work, the effects of acidification on the physiology of juvenile mussels Mytilus galloprovincialis were tested by means of controlled CO2 perturbation experiments. The carbonate chemistry of natural (control) seawater was manipulated by injecting CO2 to attain 2 reduced pH levels: −0.3 and −0.6 pH units as compared with the control seawater. After 78 d of exposure, we found that the absorption efficiency and ammonium excretion rate of juveniles were inversely related to pH. Significant differences among treatments were not observed in clearance, ingestion and respiration rates. Coherently, the maximal scope for growth and tissue dry weight were observed in mussels exposed to the pH reduction ΔpH = −0.6, suggesting that M. galloprovincialis could be tolerant to CO2 acidification, at least in the highly alkaline coastal waters of Ria Formosa (SW Portugal).

KEY WORDS: Ocean acidification · Blue mussels · Feeding behaviour · Physiological energetics · Absorption bivalves · Metabolism

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Cite this article as: Fernández-Reiriz MJ, Range P, Álvarez-Salgado XA, Espinosa J, Labarta U (2012) Tolerance of juvenile Mytilus galloprovincialis to experimental seawater acidification. Mar Ecol Prog Ser 454:65-74.

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