Seawater carbonate chemistry and growth, chain length, silica content, and toxin content of four species of diatoms and one toxic dinoflagellate ...

• Main Authors: Rigby, Kristie, Kinnby, Alexandra, Grønning, Josephine, Ryderheim, Fredrik, Cervin, Gunnar, Berdan, Emma L, Selander, Erik
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Alexandrium minutum; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chaetoceros affinis; Chaetoceros curvisetus; Chromista; Growth/Morphology; Immunology/Self-protection; Laboratory experiment; Laboratory strains; Myzozoa; Not applicable; Ochrophyta; Other; Pelagos; Phytoplankton; Single species; Skeletonema marinoi; Thalassiosira rotula; Type; Species; Treatment; Growth rate; Replicate; Biogenic silica, per cell; Comment; Concentration; Number of cells; pH; Alkalinity, total; Salinity; Temperature, water; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification; Copepods
• Online Access: https://dx.doi.org/10.1594/pangaea.945734; https://doi.pangaea.de/10.1594/PANGAEA.945734

Phytoplankton induce defensive traits in response to chemical alarm signals from grazing zooplankton. However, these signals are potentially vulnerable to changes in pH and it is not yet known how predator recognition may be affected by ocean acidification. We exposed four species of diatoms and one toxic dinoflagellate to future pCO2 levels, projected by the turn of the century, in factorial combinations with predatory cues from copepods (copepodamides). We measured the change in growth, chain length, silica content, and toxin content. Effects of increased pCO2 were highly species specific. The induction of defensive traits was accompanied by a significant reduction in growth rate in three out of five species. The reduction averaged 39% and we interpret this as an allocation cost associated with defensive traits. Copepodamides induced significant chain length reduction in three of the four diatom species. Under elevated pCO2 Skeletonema marinoi reduced silica content by 30% and in Alexandrium minutum the ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) 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 2022-06-29. ...