Seawater carbonate chemistry and calcification during an experiment with a coral Porites lutea, 2004, supplement to: Ohde, Shigeru; Hossain, Mirza M Mozaffar (2004): Effect of CaCO3 (aragonite) saturation state of seawater on calcification of Porites coral. Geochemical Journal, 38(6), 613-621

• Main Authors: Ohde, Shigeru, Hossain, Mirza M Mozaffar
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2004
• Subjects: Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Laboratory experiment; North Pacific; Porites lutea; Single species; Temperate; Site; Sample ID; Date/time start; Date/time end; Temperature, water; Salinity; Radiation, photosynthetically active; Carbonate system computation flag; pH; Alkalinity, total; Carbon, inorganic, dissolved; Carbon dioxide; Carbonate ion; Bicarbonate ion; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Calcite saturation state; Calcification rate of calcium carbonate; Experiment; Measured; Salinometer 601 MK III, YEO-KAL, Australia; PAR-sensor LI-250, LI-COR Inc.; Calculated using seacarb after Nisumaa et al. 2010; pH meter HM-60S, TOA Electronic, Japan; Titration potentiometric; Calculated using CO2SYS; Alkalinity anomaly technique Smith and Key, 1975; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.721879; https://doi.pangaea.de/10.1594/PANGAEA.721879

Using living corals collected from Okinawan coral reefs, laboratory experiments were performed to investigate the relationship between coral calcification and aragonite saturation state (W) of seawater at 25 infinity C. Calcification rate of a massive coral Porites lutea cultured in a beaker showed a linear increase with increasing Waragonite values (1.08-7.77) of seawater. The increasing trend of calcification rate (c) for W is expressed as an equation, c = aW + b (a, b: constants). When W was larger than ~4, the coral samples calcified during nighttime, indicating an evidence of dark calcification. This study strongly suggests that calcification of Porites lutea depends on W of ambient seawater. A decrease in saturation state of seawater due to increased pCO2 may decrease reef-building capacity of corals through reducing calcification rate of corals. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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).