Seawater carbonate chemistry and biological processes of coccolithophore (Gephyrocapsa oceanica and Coccolithus pelagicus ssp. braarudii) during experiments, 2011 ...

• Main Authors: Rickaby, Rosalind E M, Henderiks, Jorijntje, Young, J N
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Coccolithus braarudii; Gephyrocapsa oceanica; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Not applicable; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Experimental treatment; Species; Salinity; Temperature, water; LightDark cycle; Radiation, photosynthetically active; Bicarbonate ion; Carbonate ion; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbon dioxide; pH; Carbon, total, particulate; Carbon, organic, particulate; Nitrogen, organic, particulate; Growth rate; Carbon, total, particulate, per cell; Carbon, organic, particulate, per cell; Nitrogen, organic, particulate, per cell; Carbon, inorganic, particulate, per cell; Particulate inorganic carbon/particulate organic carbon ratio; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon, total, particulate, production per cell; Carbon, organic, particulate, production per cell; Nitrogen, organic, particulate, production per cell; Carbon, inorganic, particulate, production per cell; δ13C, dissolved inorganic carbon; δ13C, carbon dioxide, atmospheric; Coccolithus braarudii, collapsed spheres; Coccolithus braarudii, intact spheres; Coccolithus braarudii, malformed; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Carbon, inorganic, dissolved; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.771912; https://doi.pangaea.de/10.1594/PANGAEA.771912

All species of coccolithophore appear to respond to perturbations of carbonate chemistry in a different way. Here, we show that the degree of malformation, growth rate and stable isotopic composition of organic matter and carbonate produced by two contrasting species of coccolithophore (Gephyrocapsa oceanica and Coccolithus pelagicus ssp. braarudii) are indicative of differences between their photosynthetic and calcification response to changing DIC levels (ranging from ~1100 to ~7800 µmol/kg) at constant pH (8.13 ± 0.02). Gephyrocapsa oceanica thrived under all conditions of DIC, showing evidence of increased growth rates at higher DIC, but C. braarudii was detrimentally affected at high DIC showing signs of malformation, and decreased growth rates. The carbon isotopic fractionation into organic matter and the coccoliths suggests that C. braarudii utilises a common internal pool of carbon for calcification and photosynthesis but G. oceanica relies on independent supplies for each process. All ... : 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). ...