Seawater carbonate chemistry and calcification during experiments with coral communities, 2002, supplement to: Leclercq, Nicolas; Gattuso, Jean-Pierre; Jaubert, Jean (2002): Primary production, respiration, and calcification of a coral reef mesocosm under increased CO2 partial pressure. Limnology and Oceanography, 47(2), 558-564

• Main Authors: Leclercq, Nicolas, Gattuso, Jean-Pierre, Jaubert, Jean
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2002
• Subjects: Benthos; Calcification/Dissolution; Entire community; Laboratory experiment; Not applicable; Respiration; Rocky-shore community; Site; Experimental treatment; Salinity; Temperature, water; pH; Alkalinity, total; Carbon dioxide; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Partial pressure of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Calcification rate of calcium carbonate; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Calcite saturation state; Measured; pH meter Orion; Calculated; Alkalinity anomaly technique Smith and Key, 1975; Calculated using seacarb after Nisumaa et al. 2010; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Orion; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.756652; https://doi.pangaea.de/10.1594/PANGAEA.756652

The effect of increased CO2 partial pressure (pCO2) on the community metabolism (primary production, respiration, and calcification) of a coral community was investigated over periods ranging from 9 to 30 d. The community was set up in an open-top mesocosm within which pCO2 was manipulated (411, 647, and 918 µatm). The effect of increased pCO2 on the rate of calcification of the sand area of the mesocosm was also investigated. The net community primary production (NCP) did not change significantly with respect to pCO2 and was 5.1 ± 0.9 mmol O2 m-2 h-1, Dark respiration (R) increased slightly during the experiment at high pCO2, but this did not affect significantly the NCP:R ratio (1.0 ± 0.2). The rate of calcification exhibited the trend previously reported; it decreased as a function of increasing pCO2 and decreasing aragonite saturation state. This re-emphasizes the predictions that reef calcification is likely to decrease during the next century. The dissolution process of calcareous sand does not seem to be affected by open seawater carbonate chemistry; rather, it seems to be controlled by the biogeochemistry of sediment pore water. : Caution! Values are not truly measured! 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).Calcification rate data were digitized from scanned figure 3 using software GraphClick (http://www.arizona-software.ch).