Seawater carbonate chemistry and physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey ...

• Main Authors: Eriksen, Christine Schultz Yde, Walli, Melanie Desmaret, Van de Waal, Dedmer B, Helmsing, Nico R, Dahl, Emma Ove, Sørensen, Helle, Hansen, Per Juel
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: Type of study; Species, unique identification; Species, unique identification URI; Species, unique identification Semantic URI; Treatment; pH; Carbon, inorganic, dissolved; Partial pressure of carbon dioxide water at sea surface temperature wet air; Growth rate; Photosynthetic carbon fixation rate, per cell; Chlorophyll a per cell; Carbon per cell; Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Salinity; Temperature, water; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Alkalinity, total; 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.964655; https://doi.pangaea.de/10.1594/PANGAEA.964655

We studied the separate and interactive effects of pH and DIC levels on the plastidic ciliate Mesodinium rubrum, which is known to form red tides in coastal waters worldwide. Also, we tested the effects on their prey, which typically are cryptophytes belonging to the Teleaulax/Plagioslemis/Geminigera species complex. These cryptophytes not only serve as food for the ciliate, but also as a supplier of chloroplasts and prey nuclei. We exposed M. rubrum and the two cryptophyte species, T. acuta, T. amphioxeia to different pH (6.8 – 8) and DIC levels (∼ 6.5 – 26 mg C L-1) and assessed their growth and photosynthetic rates, and cellular chlorophyll a and elemental contents. ... : 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 2024-01-09. ...