Seawater carbonate chemistry and shell properties, behaviour of the mussel Mytilus galloprovincialis, supplement to: Lassoued, Jihene; Babarro, Jose M F; Padín, Xose Antonio; Comeau, Luc A; Bejaoui, Nejla; Pérez, Fiz F (2019): Behavioural and eco-physiological responses of the mussel Mytilus galloprovincialis to acidification and distinct feeding regimes. Marine Ecology Progress Series, 626, 97-108

• Main Authors: Lassoued, Jihene, Babarro, Jose M F, Padín, Xose Antonio, Comeau, Luc A, Bejaoui, Nejla, Pérez, Fiz F
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2019
• Subjects: Animalia; Behaviour; Benthic animals; Benthos; Bottles or small containers/Aquaria <20 L; Brackish waters; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Mollusca; Mytilus galloprovincialis; North Atlantic; Other; Other studied parameter or process; Single species; Temperate; Type; Species; Registration number of species; Uniform resource locator/link to reference; Experiment duration; Treatment; Partial pressure of carbon dioxide water at sea surface temperature wet air; Shell strength per shell thickness; Shell strength per shell thickness, standard deviation; Shell strength per shell thickness, standard error; Organic matter; Organic matter, standard deviation; Organic matter, standard error; Clearance rate per individual; Clearance rate, standard deviation; Clearance rate, standard error; Byssus attachment strength; Byssus attachment strength, standard deviation; Byssus attachment strength, standard error; Ratio; Ratio, standard error; Growth; Growth rate, standard deviation; Growth rate, standard error; Opening; Opening, standard deviation; Opening, standard error; Temperature, water; Temperature, water, standard deviation; Salinity; Salinity, standard deviation; pH; pH, standard deviation; Partial pressure of carbon dioxide, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Fugacity of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide in seawater, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Spectrophotometric; Calculated using CO2SYS; Potentiometric titration; Calculated using seacarb after Nisumaa et al. 2010; Calculated using seacarb after Orr et al. 2018; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.912486; https://doi.pangaea.de/10.1594/PANGAEA.912486

The carbon dioxide taken up by the ocean is increasing as levels of atmospheric carbon dioxide increase, thus lowering the ocean pH and altering the carbonate system. In this laboratory study, we evaluated the physiological responses of juvenile mussels Mytilus galloprovincialis from Galician waters (NW Iberian Peninsula) exposed to control (500 µatm) and elevated (800 or 1200 µatm) seawater pCO2 conditions under 2 different feeding regimes (optimal and suboptimal). Shell properties such as compressive strength and composition (organic matter and aragonite:calcite ratio) were negatively affected by high seawater pCO2, regardless of food availability. This result suggests that water chemistry is a main driver for shell development. Under the optimal feeding regime, mussel feeding rates increased in response to elevated pCO2, presumably as a strategy to maintain a high strength of attachment. In contrast, mussels on the suboptimal diet showed weak attachment and narrow valve opening at the highest pCO2 condition. Thus, our results suggest that with optimal food availability, mussels were resilient to water acidification with respect to feeding activity, valve opening and attachment strength. Under a suboptimal diet, however, the ability of mussels to respond to acidification was compromised. These results highlight complex ecophysiological interactions for calcifying organisms subjected to climate change. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2020-02-17.