Seawater carbonate chemistry and uptake of dissolved inorganic nitrogen and N2 fixation by Crocosphaera watsonii

• Main Authors: Umbricht, Jacqueline, Filella, Alba, Klett, Angelina, Vogts, Angela, Benavides, Mar, Voss, Maren
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: Alkalinity; total; Ammonium; Ammonium uptake rate; standard deviation; Ammonium uptake rate per cell; Aragonite saturation state; Bacteria; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; organic; particulate; particulate/Nitrogen; particulate ratio; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbon fixation rate; Cell density; Containers and aquaria (20-1000 L or < 1 m**2); Crocosphaera watsonii; Cyanobacteria; Date; Day of experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Identification; Laboratory experiment; Laboratory strains; Nitrate; Nitrate uptake rate; Nitrate uptake rate per cell; Nitrite; Nitrogen; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.971360; https://doi.org/10.1594/PANGAEA.971360

We conducted a minicosm experiment with pre-acclimated cultures of the globally significant diazotroph Crocosphaera watsonii strain WH8501 ("Crocosphaera"). PH and temperature were altered simultaneously to match the RCP scenarios 4.5 and 6 and investigate a more realistic future scenario compared to studies that focus on changes of a single stressor only. The cell abundance and nitrogen metabolism of Crocosphaera was monitored over 5 days. This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were extracted from tables in the related paper (see Related to) by the OA-ICC data curator. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) 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 2024-07-23.