Effects of increasing seawater carbon dioxide concentrations on chain formation of the diatom Asterionellopsis glacialis ...

• Main Authors: Barcelos e Ramos, Joana, Schulz, Kai Georg, Brownlee, Colin, Sett, Scarlett, Azevedo, Eduardo Brito
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Asterionellopsis glacialis; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Growth/Morphology; Laboratory experiment; North Atlantic; Ochrophyta; Open ocean; Other metabolic rates; Pelagos; Phytoplankton; Single species; Temperate; Species; Partial pressure of carbon dioxide water at sea surface temperature wet air; Percentage; Growth rate; Particulate organic phosphorus per cell; Particulate organic carbon, per cell; Particulate organic nitrogen per cell; Particulate organic phosphorus production per cell; Particulate organic carbon production per cell; Production of particulate organic nitrogen; Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Nitrogen/Phosphorus ratio; Carbon, organic, dissolved exudation, per cell; Alkalinity, total; pH; Bicarbonate ion; Carbonate ion; Carbon dioxide; Carbon, inorganic, dissolved; Temperature, water; Salinity; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Calcite saturation state; Potentiometric titration; Potentiometric; Calculated using CO2SYS; 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.836367; https://doi.pangaea.de/10.1594/PANGAEA.836367

Diatoms can occur as single cells or as chain-forming aggregates. These two strategies affect buoyancy, predator evasion, light absorption and nutrient uptake. Adjacent cells in chains establish connections through various processes that determine strength and flexibility of the bonds, and at distinct cellular locations defining colony structure. Chain length has been found to vary with temperature and nutrient availability as well as being positively correlated with growth rate. However, the potential effect of enhanced carbon dioxide (CO2) concentrations and consequent changes in seawater carbonate chemistry on chain formation is virtually unknown. Here we report on experiments with semi-continuous cultures of the freshly isolated diatom Asterionellopsis glacialis grown under increasing CO2 levels ranging from 320 to 3400 µatm. We show that the number of cells comprising a chain, and therefore chain length, increases with rising CO2 concentrations. We also demonstrate that while cell division rate changes ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 2014-09-30. ...