Seawater carbonate chemistry and Globigerinoides sacculifer biological processes during experiments, 2010 ...

• Main Authors: Lombard, Fabien, da Rocha, R E, Bijma, Jelle, Gattuso, Jean-Pierre
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Coast and continental shelf; Foraminifera; Globigerinoides sacculifer; Growth/Morphology; Heterotrophic prokaryotes; Laboratory experiment; Light; North Atlantic; North Pacific; Orbulina universa; Pelagos; Single species; Temperate; Tropical; Date; Experimental treatment; Experiment day; Temperature, water; Alkalinity, total; Alkalinity, total, standard deviation; pH; pH, standard deviation; Salinity; Bicarbonate ion; Carbonate ion; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Calcite saturation state; Aragonite saturation state; Globigerinoides sacculifer, size average; Globigerinoides sacculifer, weight; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Carbon, inorganic, dissolved; Alkalinity, Gran titration Gran, 1950; Titration potentiometric; Calculated using CO2SYS; Counting; Measured; 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; Pacific; Ocean acidification; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.744887; https://doi.pangaea.de/10.1594/PANGAEA.744887

The effect of carbonate ion concentration ([CO3]) on calcification rates estimated from shell size and weight was investigated in the planktonic foraminifera Orbulina universa and Globigerinoides sacculifer. Experiments on G. sacculifer were conducted under two irradiance levels (35 and 335 µmol photons m-2 s-1). Calcification was ca. 30% lower under low light than under high light, irrespective of the [CO3]. Both O. universa and G. sacculifer exhibited reduced final shell weight and calcification rate under low [CO3]. For the [CO3] expected at the end of the century, the calcification rates of these two species are projected to be 6 to 13% lower than the present conditions, while the final shell weights are reduced by 20 to 27% for O. universa and by 4 to 6% for G. sacculifer. These results indicate that ocean acidification would impact on calcite production by foraminifera and may decrease the calcite flux contribution from these organisms. ... : 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). ...