Brackish water carbonate chemistry and concentrations of dimethyl sulfide (DMS) and dimethylsulfoniopropionate (DMSP) ...

• Main Authors: Bénard, Robin, Lizotte, Martine, Levasseur, Maurice, Scarratt, Michael Grant, Michaud, Sonia, Starr, Michel, Tremblay, Jean-Éric, Kiene, Ronald P, Kameyama, Sohiko
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Bottles or small containers/Aquaria <20 L; Brackish waters; Community composition and diversity; Entire community; Laboratory experiment; North Atlantic; Other metabolic rates; Pelagos; Primary production/Photosynthesis; Temperate; Type; Identification; Replicate; DATE/TIME; Duration, number of days; Temperature, water; Salinity; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Alkalinity, total; Nitrate; Silicate; Phosphate; Chlorophyll a; Dimethylsulfoniopropionate, total; Dimethylsulfoniopropionate, dissolved; Dimethyl sulfide; Bacteria, cells; Primary production of carbon, particulate; Primary production of carbon, dissolved; Primary production of carbon, total; Dimethylsulfoniopropionate rate; Sulfur, 35S; Dimethyl sulfide, yield; Diatoms; Dinoflagellates; Chrysophyceae; Cryptophyceae; Prasinophyceae; Prymnesiophyceae; Flagellates indeterminata; Choanoflagellates; Cells, other; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.939831; https://doi.pangaea.de/10.1594/PANGAEA.939831

The objective of this study was to assess experimentally the potential impact of anthropogenic pH perturbation (ApHP) on concentrations of dimethyl sulfide (DMS) and dimethylsulfoniopropionate (DMSP), as well as processes governing the microbial cycling of sulfur compounds. A summer planktonic community from surface waters of the Lower St. Lawrence Estuary was monitored in microcosms over 12 days under three pCO2 targets: 1 * pCO2 (775 µatm), 2 * pCO2 (1,850 µatm), and 3 * pCO2 (2,700 µatm). A mixed phytoplankton bloom comprised of diatoms and unidentified flagellates developed over the course of the experiment. The magnitude and timing of biomass buildup, measured by chlorophyll a concentration, changed in the 3 * pCO2 treatment, reaching about half the peak chlorophyll a concentration measured in the 1 * pCO2 treatment, with a 2-day lag. Doubling and tripling the pCO2 resulted in a 15% and 40% decline in average concentrations of DMS compared to the control. Results from 35S-DMSPd uptake assays indicated ... : 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 2021-12-31. ...