Seawater carbonate chemistry, thickness and carbonate elemental composition of the test of juvenile sea urchins in a laboratory experiment ...

• Main Authors: Asnaghi, Valentina, Mangialajo, Luisa, Gattuso, Jean-Pierre, Francour, Patrice, Privitera, Davide, Chiantore, Mariachiara
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Animalia; Benthic animals; Benthos; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Corallina elongata; Cystoseira amentacea; Dictyota dichotoma; Echinodermata; Growth/Morphology; Laboratory experiment; Mediterranean Sea; Other; Paracentrotus lividus; Single species; Temperate; Species; Sample ID; Location; Partial pressure of carbon dioxide water at sea surface temperature wet air; Magnesium/Calcium ratio; Replicate; Growth rate; Thickness; Diameter; pH; pH, standard deviation; Partial pressure of carbon dioxide, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Temperature, water; Temperature, water, standard deviation; Salinity; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Potentiometric; Calculated using seacarb; Potentiometric titration; Calculated using seacarb after Nisumaa et al. 2010; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.833328; https://doi.pangaea.de/10.1594/PANGAEA.833328

Continuous anthropogenic CO2 emissions to the atmosphere and uptake by the oceans will cause a reduction of seawater pH and saturation state (Omega) of CaCO3 minerals from which marine calcifiers build their shells and skeletons. Sea urchins use the most soluble form of calcium carbonate, high-magnesium calcite, to build their skeleton, spines and grazing apparatus. In order to highlight the effects of increased pCO2 on the test thickness and carbonate elemental composition of juvenile sea urchins and potential differences in their responses linked to the diet, we performed a laboratory experiment on juvenile Paracentrotus lividus, grazing on calcifying (Corallina elongata) and non-calcifying (Cystoseira amentacea, Dictyota dichotoma) macroalgae, under different pH (corresponding to pCO2 values of 390, 550, 750 and 1000 µatm). Results highlighted the importance of the diet in determining sea urchin size irrespectively of the pCO2 level, and the relevance of macroalgal diet in modulating urchin Mg/Ca ratio. ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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 2014-03-17. ...