Seawater carbonate chemistry, physiology and skeletal mineralogy of coralline alga Corallina elongata in a laboratory experiment, supplement to: Egilsdottir, Hronn; Noisette, Fanny; Noël, Laure M L J; Ólafsson, Jón; Martin, Sophie (2012): Effects of pCO2 on physiology and skeletal mineralogy in a tidal pool coralline alga Corallina elongata. Marine Biology, 160(8), 2103-2112

• Main Authors: Egilsdottir, Hronn, Noisette, Fanny, Noël, Laure M L J, Ólafsson, Jón, Martin, Sophie
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2013
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Corallina elongata; Laboratory experiment; Macroalgae; North Atlantic; Plantae; Primary production/Photosynthesis; Respiration; Rhodophyta; Single species; Temperate; Species; Identification; Replicates; Irradiance; Partial pressure of carbon dioxide water at sea surface temperature wet air; Dry mass; Chlorophyll a; Carbon dioxide, flux; Calcification rate of calcium carbonate; Net photosynthesis rate, oxygen; Respiration rate, oxygen; Gross photosynthesis rate, oxygen; Magnesium/Calcium ratio; Salinity; Temperature, water; Temperature, water, standard error; pH; pH, standard error; Alkalinity, total; Alkalinity, total, standard error; Partial pressure of carbon dioxide water at equilibrator temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air, standard error; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Carbonate ion; Carbonate ion, standard error; Bicarbonate ion; Bicarbonate ion, standard error; Carbon dioxide; Carbon dioxide, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Calcite saturation state; Calcite saturation state, standard error; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Experiment; Alkalinity anomaly technique Smith and Key, 1975; Potentiometric; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Laure; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.831938; https://doi.pangaea.de/10.1594/PANGAEA.831938

Marine organisms inhabiting environments where pCO2/pH varies naturally are suggested to be relatively resilient to future ocean acidification. To test this hypothesis, the effect of elevated pCO2 was investigated in the articulated coralline red alga Corallina elongata from an intertidal rock pool on the north coast of Brittany (France), where pCO2 naturally varied daily between 70 and 1000 µatm. Metabolism was measured on algae in the laboratory after they had been grown for 3 weeks at pCO2 concentrations of 380, 550, 750 and 1000 µatm. Net and gross primary production, respiration and calcification rates were assessed by measurements of oxygen and total alkalinity fluxes using incubation chambers in the light and dark. Calcite mol % Mg/Ca (mMg/Ca) was analysed in the tips, branches and basal parts of the fronds, as well as in new skeletal structures produced by the algae in the different pCO2 treatments. Respiration, gross primary production and calcification in light and dark were not significantly affected by increased pCO2. Algae grown under elevated pCO2 (550, 750 and 1000 µatm) formed fewer new structures and produced calcite with a lower mMg/Ca ratio relative to those grown under 380 µatm. This study supports the assumption that C. elongata from a tidal pool, where pCO2 fluctuates over diel and seasonal cycles, is relatively robust to elevated pCO2 compared to other recently investigated coralline algae. : 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). The date of carbonate chemistry calculation by seacarb is 2014-04-15.