Seawater carbonate chemistry and boron incorporation of planktic foraminifer Orbulina universa during experiments, 2011 ...

• Main Authors: Allen, Katherine A, Hönish, Bärbel, Eggins, Stephen M, Yu, Jimin, Spero, Howard J, Elderfield, Henry
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Foraminifera; Heterotrophic prokaryotes; Laboratory experiment; North Pacific; Open ocean; Orbulina universa; Pelagos; Single species; Temperate; Experimental treatment; Identification; Salinity; Temperature, water; pH; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Boron; Boron hydroxide; Boron hydroxide, standard deviation; Boron hydroxide/Bicarbonate ratio; Boron/Calcium ratio; Boron/Calcium ratio, standard deviation; Apparent partition coefficient, boron to calcite incorporation x1000; Orbulina universa, shell, weight; Orbulina universa, shell, weight, standard deviation; Orbulina universa, size average; Orbulina universa, size, standard deviation; 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; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Measured; Metrohm Titrando titrator; Calculated using CO2SYS; ICP-MS, Perkin-Elmer, SCIEX Elan DRC II; Counting, foraminifera, planktic; 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
• Online Access: https://dx.doi.org/10.1594/pangaea.770067; https://doi.pangaea.de/10.1594/PANGAEA.770067

Culture experiments with living planktic foraminifers reveal that the ratio of boron to calcium (B/Ca) in Orbulina universa increases from 56 to 92 µmol mol-1 when pH is raised from 7.61 +/- 0.02 to 8.67 +/- 0.03 (total scale). Across this pH range, the abundances of carbonate, bicarbonate, and borate ions also change (+ 530, - 500, and + 170 µmol kg-1, respectively). Thus specific carbonate system control(s) on B/Ca remain unclear, complicating interpretation of paleorecords. B/Ca in cultured O. universa also increases with salinity (55-72 µmol mol-1 from 29.9-35.4 per mil) and seawater boron concentration (62-899 µmol mol-1 from 4-40 ppm B), suggesting that these parameters may need to be taken into account for paleorecords spanning large salinity changes (~ 2 per mil) and for samples grown in seawater whose boron concentration ([B]SW) differs from modern by more than 0.25 ppm. While our results are consistent with the predominant incorporation of the charged borate species B(OH)4 into foraminiferal ... : 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). ...