Seawater carbonate chemistry and population structure of Ervilia castanea (Mollusca, Bivalvia)

• Main Authors: Martins, M, Carreiro-Silva, Marina, Martins, Gustavo M, Barcelos e Ramos, Joana, Viveiros, Fatima, Couto, Ruben P, Parra, Hugo, Monteiro, João, Gallo, F, Silva, Catarina I F, Teodósio, Alexandra, Guilini, Katja, Hall-Spencer, Jason M, Leitão, F, ChÌcharo, L, Range, P
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2020
• Subjects: Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Calcification/Dissolution; CO2 vent; Coast and continental shelf; Ervilia castanea; Field observation; Mollusca; North Atlantic; Other studied parameter or process; Single species; Temperate; Event label; Type; Species; Registration number of species; Uniform resource locator/link to reference; DATE/TIME; Site; Identification; Replicate; Sample code/label; LATITUDE; LONGITUDE; Abundance per area; Size; Dry mass; Ash mass; Percentage; Granulometry; Granulometry, standard error; Organic matter; Organic matter, standard error; Calcium carbonate; Calcium carbonate, standard error; Fucoxanthin; Fucoxanthin, standard error; Chlorophyll a; Chlorophyll a, standard error; Pigments; Pigments, standard error; Nitrogen, total; Nitrogen, total, standard error; Carbon, organic, total; Carbon, organic, total, standard error; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard error; Temperature, water; Temperature, water, standard error; Salinity; Salinity, standard error; pH; pH, standard error; Alkalinity, total; Alkalinity, total, standard error; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, 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; Bicarbonate ion; Bicarbonate ion, standard error; Carbonate ion; Carbonate ion, standard error; Hydroxide ion; Hydroxide ion, standard error; Calcite saturation state; Calcite saturation state, 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; Experiment; Potentiometric; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.923155; https://doi.pangaea.de/10.1594/PANGAEA.923155

Sites with naturally high CO2 conditions provide unique opportunities to forecast the vulnerability of coastal ecosystems to ocean acidification, by studying the biological responses and potential adaptations to this increased environmental variability. In this study, we investigated the bivalve Ervilia castanea in coastal sandy sediments at reference sites and at volcanic CO2 seeps off the Azores, where the pH of bottom waters ranged from average oceanic levels of 8.2, along gradients, down to 6.81, in carbonated seawater at the seeps. The bivalve population structure changed markedly at the seeps. Large individuals became less abundant as seawater CO2 levels rose and were completely absent from the most acidified sites. In contrast, small bivalves were most abundant at the CO2 seeps. We propose that larvae can settle and initially live in high abundances under elevated CO2 levels, but that high rates of post-settlement dispersal and/or mortality occur. Ervilia castanea were susceptible to elevated CO2 levels and these effects were consistently associated with lower food supplies. This raises concerns about the effects of ocean acidification on the brood stock of this species and other bivalve molluscs with similar life history traits. : 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 2020-09-18.