Impact of elevated pCO2 on acid-base regulation of the sea urchin Echinometra mathaei and its relation to resistance to ocean acidification: A study in mesocosms, supplement to: Moulin, Laure; Grosjean, Philippe; Leblud, Julien; Batigny, Antoine; Dubois, Philippe (2014): Impact of elevated pCO2 on acid–base regulation of the sea urchin Echinometra mathaei and its relation to resistance to ocean acidification: A study in mesocosms. Journal of Experimental Marine Biology and Ecology, 457, 97-104

• Main Authors: Moulin, Laure, Grosjean, Philippe, Leblud, Julien, Batigny, Antoine, Dubois, Philippe
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2014
• Subjects: Acid-base regulation; Animalia; Benthic animals; Benthos; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Echinodermata; Echinometra mathaei; Growth/Morphology; Indian Ocean; Laboratory experiment; Respiration; Single species; Tropical; Figure; Species; Identification; pH; Aquarium number; Individual code; Growth; Respiration rate, oxygen; Date; Incubation duration; Coelomic fluid, pH; Coelomic fluid, alkalinity; Coelomic fluid, partial pressure of carbon dioxide; Alkalinity, total; Partial pressure of carbon dioxide water at sea surface temperature wet air; Salinity; Temperature, water; 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; Calcite saturation state; Potentiometric; Potentiometric titration; Infrared spectrometric; Calculated using seacarb; Calculated; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; DuBois; Indian; Laure; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.836066; https://doi.pangaea.de/10.1594/PANGAEA.836066

Due to their low metabolism and apparent poor ion regulation ability, sea urchins could be particularly sensitive to ocean acidification resulting from increased dissolution of atmospheric carbon dioxide. Therefore, we evaluated the acid-base regulation ability of the coral reef sea urchin Echinometra mathaei and the impact of decreased pH on its growth and respiration activity. The study was conducted in two identical artificial reef mesocosms during seven weeks. Experimental tanks were maintained respectively at mean pHT 7.7 and 8.05 (with field-like night and day variations). The major physico-chemical parameters were identical, only pCO2 and pHT differed. Results indicate that E. mathaei can regulate the pH of its coelomic fluid in the considered range of pH, allowing a sustainable growth and ensuring an unaffected respiratory metabolism, at least at short term. : 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 2014-09-16.