Seawater carbonate chemistry and resistance to ocean acidification in coral reef taxa ...

• Main Authors: Comeau, Steeve, Cornwall, Christopher Edward, DeCarlo, Thomas M, Doo, Steve S, Carpenter, Robert C, McCulloch, Malcolm T
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Acid-base regulation; Acropora pulchra; Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Calcification/Dissolution; Chlorophyta; Cnidaria; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Halimeda minima; Laboratory experiment; Lithophyllum kotschyanum; Macroalgae; Plantae; Pocillopora verrucosa; Porites sp.; Psammocora profundacella; Rhodophyta; South Pacific; Species interaction; Tropical; Type of study; Species; Identification; Treatment partial pressure of carbon dioxide; Calcification rate of calcium carbonate; Boron/Calcium ratio; δ11B; Aragonite saturation state; Calcifying fluid, pH; Calcifying fluid, dissolved inorganic carbon; Ratio; Temperature, water; Salinity; Alkalinity, total; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; 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; Potentiometric titration; Potentiometric; 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.959675; https://doi.pangaea.de/10.1594/PANGAEA.959675

Ocean acidification (OA) is a major threat to coral reefs, which are built by calcareous species. However, long-term assessments of the impacts of OA are scarce, limiting the understanding of the capacity of corals and coralline algae to acclimatize to high partial pressure of carbon dioxide (pCO2) levels. Species-specific sensitivities to OA are influenced by its impacts on chemistry within the calcifying fluid (CF). Here, we investigate the capacity of multiple coral and calcifying macroalgal species to acclimatize to elevated pCO2 by determining their chemistry in the CF during a year-long experiment. We found no evidence of acclimatization to elevated pCO2 across any of the tested taxa. The effects of increasing seawater pCO2 on the CF chemistry were rapid and persisted until the end of the experiment. Our results show that acclimatization of the CF chemistry does not occur within one year, which confirms the threat of OA for future reef accretion and ecological function. ... : 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 2023-06-08. ...