Physiological response of E. huxleyi ecotype A, strain SO5.14 to changing carbonate chemistry under nutrient-replete conditions ...

• Main Authors: Müller, Marius N, Trull, Tom W, Hallegraeff, Gustaaf M
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Emiliania huxleyi; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Macro-nutrients; Not applicable; Phytoplankton; Primary production/Photosynthesis; Single species; Type of study; Species, unique identification; Species, unique identification URI; Species, unique identification Semantic URI; Treatment; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbon, organic, particulate, per cell; Carbon, inorganic, particulate, per cell; Particulate organic nitrogen per cell; Volume; Cell biovolume; Coccoliths, volume; Carbon, inorganic, dissolved; Alkalinity, total; pH; Carbon dioxide; Bicarbonate ion; Carbonate ion; Calcite saturation state; Salinity; Temperature, water; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Coulometric titration; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.958503; https://doi.pangaea.de/10.1594/PANGAEA.958503

Future oceanic conditions induced by anthropogenic greenhouse gas emissions include warming, acidification and reduced nutrient supply due to increased stratification. Some parts of the Southern Ocean are expected to show rapid changes, especially for carbonate mineral saturation. Here we compare the physiological response of the model coccolithophore Emiliania huxleyi (strain EHSO 5.14, originating from 50S, 149E) with pH/CO2 gradients (mimicking ocean acidification ranging from 1 to 4 × current pCO2 levels) under nutrient-limited (nitrogen and phosphorus) and -replete conditions. Both nutrient limitations decreased per cell photosynthesis (particulate organic carbon (POC) production) and calcification (particulate inorganic carbon (PIC) production) rates for all pCO2 levels, with more than 50% reductions under nitrogen limitation. These impacts, however, became indistinguishable from nutrient-replete conditions when normalized to cell volume. Calcification decreased three-fold and linearly with increasing ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) 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 2023-05-05. ...