Seawater carbonate chemistry and the organic ligands released by Emiliania huxleyi ...

• Main Authors: Samperio-Ramos, Guillermo, Santana-Casiano, Juana Magdalena, González-Dávila, Melchor, Ferreira, Sonia, Coimbra, Manuel A
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Bottles or small containers/Aquaria <20 L; Chromista; Emiliania huxleyi; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Not applicable; Other metabolic rates; Pelagos; Phytoplankton; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; Experiment duration; Stage; Partial pressure of carbon dioxide water at sea surface temperature wet air; Growth rate; Growth rate, standard error; Dissolved organic carbon extracellular release rate per cell; Dissolved organic carbon extracellular release rate, standard error; Phenolic compounds extracellular release rate per cell; Phenolic compounds extracellular release rate, standard error; Total dissolved combined carbohydrates extracellular release rate per cell; Total dissolved combined carbohydrates extracellular release rate, standard error; Dissolved uronic acids extracellular release rate per cell; Dissolved uronic acids extracellular release rate, standard error; Temperature, water; Salinity; pH; Alkalinity, total; Alkalinity, total, standard error; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Partial pressure of carbon dioxide water at sea surface temperature wet air, standard error; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Calcite saturation state; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.891195; https://doi.pangaea.de/10.1594/PANGAEA.891195

The variability in the extracellular release of organic ligands by Emiliania huxleyi under four different pCO2 scenarios (225, 350, 600 and 900 μatm), was determined. Growth in the batch cultures was promoted by enriching them only with major nutrients and low iron concentrations. No chelating agents were added to control metal speciation. During the initial (IP), exponential (EP) and steady (SP) phases, extracellular release rates, normalized per cell and day, of dissolved organic carbon (DOCER), phenolic compounds (PhCER), dissolved combined carbohydrates (DCCHOER) and dissolved uronic acids (DUAER) in the exudates were determined.The growth rate decreased in the highest CO2 treatment during the IP (＜48 h), but later increased when the exposure was longer (more than 6 days). DOCER did not increase significantly with high pCO2. Although no relationship was observed between DCCHOER and the CO2 conditions, DCCHO was a substantial fraction of the freshly released organic material, accounting for 18% to 37%, in ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) 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). The date of carbonate chemistry calculation by seacarb is 2018-05-23. ...