Seawater carbonate chemistry and tropical coral calcification ...

• Main Authors: Allison, Nicola, Cole, Catherine, Hintz, Chris, Hintz, Ken, Rae, James, Finch, Adrian A
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Acid-base regulation; Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Laboratory experiment; Porites lutea; Porites murrayensis; Single species; South Pacific; Tropical; Type of study; Species, unique identification; Species, unique identification URI; Species, unique identification Semantic URI; Treatment partial pressure of carbon dioxide; Genotype; Calcification rate of carbon; Calcification rate, standard deviation; Replicates; δ11B; δ11B, standard deviation; Boron/Calcium ratio; Boron/Calcium ratio, standard deviation; Calcifying fluid, pH; Calcifying fluid, pH, standard deviation; Temperature, water; Temperature, water, standard deviation; Salinity; Salinity, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; pH; Boron; Boron, standard deviation; Calcium; Calcium, standard deviation; Carbonate system computation flag; pH, standard deviation; 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; Partial pressure of carbon dioxide water at sea surface temperature wet air; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.959560; https://doi.pangaea.de/10.1594/PANGAEA.959560

Ocean acidification typically reduces calcification in tropical marine corals but the mechanism for this process is not understood. We use skeletal boron geochemistry (B/Ca and δ11B) to reconstruct the calcification fluid DIC of corals cultured over both high and low seawater pCO2 (180, 400 and 750 μatm). We observe strong positive correlations between calcification fluid pH and concentrations of the DIC species potentially implicated in aragonite precipitation (be they CO32−, HCO3− or HCO3− + CO32−). Similarly, with the exception of one outlier, the fluid concentrations of precipitating DIC species are strongly positively correlated with coral calcification rate. Corals cultured at high seawater pCO2 usually have low calcification fluid pH and low concentrations of precipitating DIC, suggesting that a reduction in DIC substrate at the calcification site is responsible for decreased calcification. The outlier coral maintained high pHCF and DICCF at high seawater pCO2 but exhibited a reduced calcification ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) 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 2023-05-31. ...