Seawater carbonate chemistry and shell mineralogy, microstructure, and mechanical strength of four Mediterranean gastropod species near a CO2 seep, supplement to: Duquette, Ashley; McClintock, James B; Amsler, Charles D; Pérez-Huerta, Alberto; Milazzo, Marco; Hall-Spencer, Jason M (2017): Effects of ocean acidification on the shells of four Mediterranean gastropod species near a CO2 seep. Marine Pollution Bulletin, 124(2), 917-928

• Main Authors: Duquette, Ashley, McClintock, James B, Amsler, Charles D, Pérez-Huerta, Alberto, Milazzo, Marco, Hall-Spencer, Jason M
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2017
• Subjects: Animalia; Benthic animals; Benthos; CO2 vent; Coast and continental shelf; Field observation; Growth/Morphology; Hexaplex trunculus; Mediterranean Sea; Mollusca; Osilinus turbinatus; Other studied parameter or process; Patella caerulea; Patella rustica; Single species; Temperate; Type; Species; Registration number of species; Uniform resource locator/link to reference; Identification; Location; Treatment; Force; Toughness; Elasticity; Length; Calcite; Aragonite; Salinity; Salinity, standard error; Temperature, water; Temperature, water, standard error; pH; pH, standard error; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air, standard error; Alkalinity, total; Alkalinity, total, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Calcite saturation state; Experiment; Potentiometric; Calculated using CO2SYS; Potentiometric titration; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; McClintock; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.890582; https://doi.pangaea.de/10.1594/PANGAEA.890582

Marine CO2 seeps allow the study of the long-term effects of elevated pCO2 (ocean acidification) on marine invertebrate biomineralization. We investigated the effects of ocean acidification on shell composition and structure in four ecologically important species of Mediterranean gastropods (two limpets, a top-shell snail, and a whelk). Individuals were sampled from three sites near a volcanic CO2 seep off Vulcano Island, Italy. The three sites represented ambient (8.15 pH), moderate (8.03 pH) and low (7.73 pH) seawater mean pH. Shell mineralogy, microstructure, and mechanical strength were examined in all four species. We found that the calcite/aragonite ratio could vary and increased significantly with reduced pH in shells of one of the two limpet species. Moreover, each of the four gastropods displayed reductions in either inner shell toughness or elasticity at the Low pH site. These results suggest that near-future ocean acidification could alter shell biomineralization and structure in these common gastropods. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 is 2014-09-16.