Seawater carbonate chemistry and macromolecular data of diatoms ...

• Main Authors: Duncan, Rebecca J, Nielsen, Daniel A, Sheehan, Cristin E, Deppeler, Stacy, Hancock, Alyce M, Schulz, Kai, Davidson, Andrew T, Petrou, Katherina
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Antarctic; Coast and continental shelf; Community composition and diversity; Containers and aquaria 20-1000 L or < 1 m**2; Entire community; Growth/Morphology; Laboratory experiment; Other studied parameter or process; Pelagos; Polar; Type; Species; Sample code/label; Identification; Peak area; Compounds; Cell biovolume; Fugacity of carbon dioxide water at sea surface temperature wet air; Phosphorus, reactive soluble; Silicate; Carbon, inorganic, dissolved; pH; Alkalinity, total; Salinity; Temperature, water; Carbonate system computation flag; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Calcite saturation state; Experiment; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Antarc*; Ocean acidification; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.944403; https://doi.pangaea.de/10.1594/PANGAEA.944403

Primary production in the Southern Ocean is dominated by diatom-rich phytoplankton assemblages, whose individual physiological characteristics and community composition are strongly shaped by the environment, yet knowledge on how diatoms allocate cellular energy in response to ocean acidification (OA) is limited. Understanding such changes in allocation is integral to determining the nutritional quality of diatoms and the subsequent impacts on the trophic transfer of energy and nutrients.Using synchrotron-based Fourier transform infrared microspectroscopy, we analysed the macromolecular content of selected individual diatom taxa from a natural Antarctic phytoplankton community exposed to a gradient of fCO2 levels (288–1263 µatm).Strong species-specific differences in macromolecular partitioning were observed under OA. Large taxa showed preferential energy allocation towards proteins, while smaller taxa increased both lipid and protein stores at high fCO2.If these changes are representative of future ... : 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 2022-05-18. ...