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: Alkalinity; total; Aragonite saturation state; Bicarbonate ion; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon per cell; Chlorophyll a per cell; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth rate; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Photosynthetic carbon fixation rate; per cell; Salinity; Species; unique identification; unique identification (Semantic URI); unique identification (URI); Temperature; water; Treatment; Type of study; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.964655; https://doi.org/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.