Seawater carbonate chemistry, Mg/Ca, Sr/Ca, oxygen production and calcification rate during experiments with coral Pocillopora damicornis, 2011, supplement to: Allison, Nicola; Cohen, Itay; Finch, Adrian A; Erez, Jonathan; EMIF (2011): Controls on Sr/Ca and Mg/Ca in scleractinian corals: The effects of Ca-ATPase and transcellular Ca channels on skeletal chemistry. Geochimica et Cosmochimica Acta, 75(21), 6350-6360

• Main Authors: Allison, Nicola, Cohen, Itay, Finch, Adrian A, Erez, Jonathan, EMIF
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2011
• Subjects: Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Laboratory experiment; Pocillopora damicornis; Primary production/Photosynthesis; Red Sea; Single species; Temperate; Experimental treatment; Identification; Replicates; Salinity; Temperature, water; pH; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Oxygen; Oxygen, standard deviation; Magnesium/Calcium ratio; Magnesium/Calcium ratio, standard deviation; Strontium/Calcium ratio; Strontium/Calcium ratio, standard deviation; Sample ID; Oxygen production rate; Net calcification rate of calcium carbonate; Carbonate system computation flag; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Measured; Alkalinity, Gran titration Gran, 1950; Titration, Winkler; ICP-MS, Thermo Scientific, XSeries 2; Calculated, see references; 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; Finch; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.774781; https://doi.pangaea.de/10.1594/PANGAEA.774781

The Sr/Ca of aragonitic coral skeletons is a commonly used palaeothermometer. However skeletal Sr/Ca is typically dominated by weekly-monthly oscillations which do not reflect temperature or seawater composition and the origins of which are currently unknown. To test the impact of transcellular Ca2+ transport processes on skeletal Sr/Ca, colonies of the branching coral, Pocillopora damicornis, were cultured in the presence of inhibitors of Ca-ATPase (ruthenium red) and Ca channels (verapamil hydrochloride). The photosynthesis, respiration and calcification rates of the colonies were monitored throughout the experiment. The skeleton deposited in the presence of the inhibitors was identified (by 42Ca spike) and analysed for Sr/Ca and Mg/Ca by secondary ion mass spectrometry. The Sr/Ca of the aragonite deposited in the presence of either of the inhibitors was not significantly different from that of the solvent (dimethyl sulfoxide) control, although the coral calcification rate was reduced by up to 66% and 73% in the ruthenium red and verapamil treatments, respectively. The typical precision (95% confidence limits) of mean Sr/Ca determinations within any treatment was : 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).