Seawater carbonate chemistry, chlorophyll a and phosphate during experiments with Trichodesmium erythraeum IMS101 (CCMP1985), 2010 ...

• Main Authors: Kranz, Sven A, Wolf-Gladrow, Dieter A, Nehrke, Gernot, Langer, Gerald, Rost, Björn
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Bacteria; Bottles or small containers/Aquaria <20 L; Cyanobacteria; Laboratory experiment; Laboratory strains; Not applicable; Pelagos; Phytoplankton; Single species; Trichodesmium erythraeum; Experimental treatment; Comment; Experiment day; LightDark cycle; Radiation, photosynthetically active; Salinity; Temperature, water; Species; Chlorophyll a; Phosphate; Carbon, inorganic, dissolved; pH; Alkalinity, total; Aragonite saturation state; Carbonate system computation flag; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Calcite saturation state; Measured; Conductivity meter WTW, Weilheim, Gemany; see references; Auto-analyzer, Technicon Traacs 800; Calculated using CO2SYS; Alkalinity, Gran titration Gran, 1950; Calculated using seacarb after Nisumaa et al. 2010; Biological Impacts of Ocean Acidification BIOACID; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.777419; https://doi.pangaea.de/10.1594/PANGAEA.777419

In this laboratory study, we monitored the buildup of biomass and concomitant shift in seawater carbonate chemistry over the course of a Trichodesmium bloom under different phosphorus (P) availability. During exponential growth, dissolved inorganic carbon (DIC) decreased, while pH increased until maximum cell densities were reached. Once P became depleted, DIC decreased even further and total alkalinity (TA) dropped, accompanied by precipitation of aragonite. Under P-replete conditions, DIC increased and TA remained constant in the postbloom phase. A diffusion-reaction model was employed to estimate changes in carbonate chemistry of the diffusive boundary layer. This study demonstrates that Trichodesmium can induce precipitation of aragonite from seawater and further provides possible explanations about underlying mechanisms. ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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). ...