Seawater carbonate chemistry and long term calcification, dark respiration, gross photosynthesis, and short-term calcification of two Mediterranean colonial corals Cladocora caespitosa (zooxanthellate) and Astroides calycularis (azooxanthellate) ...

• Main Authors: Carbonne, Chloe, Teixidó, Núria, Moore, B, Mirasole, Alice, Guttierez, Thomas, Gattuso, Jean-Pierre, Comeau, Steeve
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Animalia; Astroides calycularis; Benthic animals; Benthos; Calcification/Dissolution; Cladocora caespitosa; Cnidaria; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Laboratory experiment; Mediterranean Sea; Primary production/Photosynthesis; Respiration; Single species; Temperate; Type; Species; Registration number of species; Uniform resource locator/link to reference; Origin; Treatment; Calcification rate of calcium carbonate; Calcification rate, standard error; Replicates; Respiration rate, oxygen; Respiration rate, oxygen, standard error; Gross photosynthesis rate, oxygen; Photosynthesis rate of oxygen, standard error; Salinity; Salinity, standard deviation; Temperature, water; Temperature, water, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; pH; pH, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Fugacity of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide in seawater, standard deviation; Bicarbonate ion; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.943187; https://doi.pangaea.de/10.1594/PANGAEA.943187

Ocean acidification is perceived to be a major threat for many calcifying organisms, including scleractinian corals. Here we investigate (1) whether past exposure to low pH environments associated with CO2 vents could increase corals tolerance to low pH and (2) whether zooxanthellate corals are more tolerant to low pH than azooxanthellate corals. To test these hypotheses, two Mediterranean colonial corals Cladocora caespitosa (zooxanthellate) and Astroides calycularis (azooxanthellate) were collected from CO2 vents and reference sites and incubated in the laboratory under present-day (pH on the total scale, pHT 8.07) and low pH conditions (pHT 7.70). Rates of net calcification, dark respiration and photosynthesis were monitored during a six-month experiment. Monthly net calcification was assessed every 27 to 35 d using the buoyant weight technique, whereas light and dark net calcification was estimated using the alkalinity anomaly technique during 1 h incubations. Neither species showed any change in net ... : 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 2022-04-11. ...