The effects of elevated CO2 on the growth and toxicity of field populations and cultures of the saxitoxin-producing dinoflagellate, Alexandrium fundyense ...

• Main Authors: Hattenrath-Lehmann, Theresa K, Smith, Juliette L, Wallace, Ryan B, Merlo, Lucas R, Koch, Florian, Mittelsdorf, Heidi, Goleski, Jennifer A, Anderson, Donald M, Gobler, Christopher J
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Alexandrium fundyense; Bottles or small containers/Aquaria <20 L; Chromista; Growth/Morphology; Immunology/Self-protection; Laboratory experiment; Laboratory strains; Myzozoa; North Atlantic; Pelagos; Phytoplankton; Single species; Event label; Species; Strain; Experiment; Treatment; Growth rate; Toxicity, cellular; pH; pH, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Incubation duration; Date; Calcite saturation state; Aragonite saturation state; Carbonate ion; Salinity; Temperature, water; Silicate; Phosphate; Cell density; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Potentiometric; Calculated using CO2SYS; Coulometric titration; Infrared spectrometric; 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.846486; https://doi.pangaea.de/10.1594/PANGAEA.846486

The effects of coastal acidification on the growth and toxicity of the saxitoxin-producing dinoflagellate Alexandrium fundyense were examined in culture and ecosystem studies. In culture experiments, Alexandrium strains isolated from Northport Bay, New York, and the Bay of Fundy, Canada, grew significantly faster (16-190%; p < 0.05) when exposed to elevated levels of PCO2 ( 90-190 Pa=900-1900 µatm) compared to lower levels ( 40 Pa=400 µatm). Exposure to higher levels of PCO2 also resulted in significant increases (71-81%) in total cellular toxicity (fg saxitoxin equivalents/cell) in the Northport Bay strain, while no changes in toxicity were detected in the Bay of Fundy strain. The positive relationship between PCO2 enrichment and elevated growth was reproducible in natural populations from New York waters. Alexandrium densities were significantly and consistently enhanced when natural populations were incubated at 150 Pa PCO2 compared to 39 Pa. During natural Alexandrium blooms in Northport Bay, PCO2 ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 2015-05-21. ...