Seawater carbonate chemistry and gastrovascular cavity pH, calcification of Montastraea cavernosa and Duncanopsammia axifuga ...

• Main Authors: Bove, Colleen B, Whitehead, Robert F, Szmant, A M
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: Acid-base regulation; Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Cnidaria; Duncanopsammia axifuga; Laboratory experiment; Laboratory strains; Montastraea cavernosa; Not applicable; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; DATE/TIME; Treatment; Time in hours; Oxygen saturation; Calcification rate of calcium carbonate; Identification; pH; pH, standard deviation; Experiment; Light mode; Replicates; pH, standard error; pH, difference; Range; Salinity; Temperature, water; Alkalinity, total; Carbon, inorganic, dissolved; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Calcite saturation state; 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.927310; https://doi.pangaea.de/10.1594/PANGAEA.927310

Coral polyps have a fluid-filled internal compartment, the gastrovascular cavity (GVC). Respiration and photosynthesis cause large daily excursions in GVC oxygen concentration (O2) and pH, but few studies have examined how this correlates with calcification rates. We hypothesized that GVC chemistry can mediate and ameliorate the effects of decreasing seawater pH (pHSW) on coral calcification. Microelectrodes were used to monitor O2 and pH within the GVC of Montastraea cavernosa and Duncanopsammia axifuga (pH only) in both the light and the dark, and three pHSW levels (8.2, 7.9, and 7.6). At pHSW 8.2, GVC O2 ranged from ca. 0 to over 400% saturation in the dark and light, respectively, with transitions from low to high (and vice versa) within minutes of turning the light on or off. For all three pHSW treatments and both species, pHGVC was always significantly above and below pHSW in the light and dark, respectively. For M. cavernosa in the light, pHGVC reached levels of pH 8.4–8.7 with no difference among ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2020) 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 2021-01-25. ...