Seawater carbonate chemistry and calcification during an experiment with a coral Porites lutea, 2004


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).

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

Related Identifier
Metadata Access
Creator Ohde, Shigeru; Hossain, Mirza M Mozaffar
Publisher PANGAEA
Contributor Nisumaa, Anne-Marin
Publication Year 2004
Funding Reference Seventh Framework Programme, 211384; Sixth Framework Programme, 511106
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 920 data points
Discipline Earth System Research