H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification ...

• Main Authors: Kottmeier, Dorothee, Rokitta, Sebastian D, Rost, Björn
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Emiliania huxleyi; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Not applicable; Pelagos; Phytoplankton; Primary production/Photosynthesis; Respiration; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; Treatment; Growth rate; Growth rate, standard deviation; Carbon, organic, particulate, per cell; Carbon, organic, particulate, standard deviation; Particulate organic carbon production per cell; Particulate organic carbon, production, standard deviation; Carbon, inorganic, particulate, per cell; Carbon, inorganic, particulate, standard deviation; Particulate inorganic carbon production per cell; Particulate inorganic carbon, production, standard deviation; Particulate inorganic carbon/particulate organic carbon ratio; Particulate inorganic carbon/particulate organic carbon ratio, standard deviation; Chlorophyll a per cell; Chlorophyll a, standard deviation; Chlorophyll a/particulate organic carbon ratio; Chlorophyll a/particulate organic carbon ratio, standard deviation; Particulate organic nitrogen per cell; Particulate organic nitrogen per cell, standard deviation; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon, organic, particulate/Nitrogen, organic, particulate ratio, standard deviation; Net photosynthesis rate, oxygen, per chlorophyll a; Net photosynthesis rate, standard deviation; Carbon dioxide uptake rate in chlorophyll; Carbon dioxide uptake in chlorophyll, standard deviation; Bicarbonate uptake rate in chlorophyll; Bicarbonate uptake in chlorophyll, standard deviation; Carbon dioxide usage fraction; Carbon dioxide usage fraction, standard deviation; Calcification rate of calcium carbonate; Calcification rate, standard deviation; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.873376; https://doi.pangaea.de/10.1594/PANGAEA.873376

Recent ocean acidification (OA) studies revealed that seawater [H+] rather than [CO2] or [ inline image] regulate short-term responses in carbon fluxes of Emiliania huxleyi. Here, we investigated whether acclimation to altered carbonate chemistry modulates this regulation pattern and how the carbon supply for calcification is affected by carbonate chemistry. We acclimated E. huxleyi to present-day (ambient [CO2], [ inline image], and pH) and OA conditions (high [CO2], ambient [ inline image], low pH). To differentiate between the CO2 and pH/H+ effects, we also acclimated cells to carbonation (high [CO2] and [ inline image], ambient pH) and acidification (ambient [CO2], low [ inline image], and pH). Under these conditions, growth, production of particulate inorganic and organic carbon, as well as carbon and oxygen fluxes were measured. Under carbonation, photosynthesis and calcification were stimulated due to additional inline image uptake, whereas growth was unaffected. Such stimulatory effects are not ... : 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 is 2017-03-10. ...