Seawater carbonate chemistry and biological processes during experiments with Coccolithus braarudii, 2011 ...

• Main Authors: Krug, Sebastian, Schulz, Kai Georg, Riebesell, Ulf
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Coccolithus braarudii; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; South Atlantic; Experimental treatment; Identification; Salinity; Temperature, water; Radiation, photosynthetically active; LightDark cycle; Nitrate; Phosphate; Carbon, inorganic, dissolved; Alkalinity, total; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbon dioxide; Bicarbonate ion; Carbonate ion; Calcite saturation state; pH; Carbon, inorganic, particulate, production per cell; Carbon, organic, particulate, production per cell; Particulate inorganic carbon/particulate organic carbon ratio; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Coccolithus braarudii, size; Coccolithus braarudii, size, standard deviation; Growth rate; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Photometrically using autoanalyzer QUAATRO; Titration potentiometric, 794 Basic Titrino Metrohm; Thermal conductivity meter; Measured; Coulter counter; Calculated, see references; 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; Coulter; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.762350; https://doi.pangaea.de/10.1594/PANGAEA.762350

Ocean acidification and associated shifts in carbonate chemistry speciation induced by increasing levels of atmospheric carbon dioxide (CO2) have the potential to impact marine biota in various ways. The process of biogenic calcification, for instance, is usually shown to be negatively affected. In coccolithophores, an important group of pelagic calcifiers, changes in cellular calcification rates in response to changing ocean carbonate chemistry appear to differ among species. By applying a wider CO2 range we show that a species previously reported insensitive to seawater acidification, Coccolithusbraarudii, responds both in terms of calcification and photosynthesis, although at higher levels of CO2. Thus, observed differences between species seem to be related to individual sensitivities while the underlying mechanisms could be the same. On this basis we develop a conceptual model of coccolithophorid calcification and photosynthesis in response to CO2-induced changes in seawater carbonate chemistry ... : 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). ...