Seawater carbonate chemistry and calcification during tropical reef studies at Moorea (French Polynesia), 1997, supplement to: Gattuso, Jean-Pierre; Payri, Claude E; Pichon, Michel; Delesalle, Bruno; Frankignoulle, Michel (1997): Primary production, calcification, and air-sea CO2 fluxes of a macroalgal-dominated coral reef community (Moorea, French Polynesia). Journal of Phycology, 33(5), 729-738

• Main Authors: Gattuso, Jean-Pierre, Payri, Claude E, Pichon, Michel, Delesalle, Bruno, Frankignoulle, Michel
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1997
• Subjects: Benthos; Calcification/Dissolution; Coast and continental shelf; Entire community; Field observation; Soft-bottom community; South Pacific; Tropical; DATE/TIME; DEPTH, water; Salinity; Temperature, water; Radiation, photosynthetically active; pH; Alkalinity, total; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Calcification rate of calcium carbonate; Experiment; LICOR quantameter LI-COR LI-192SA; Calculated using seacarb after Nisumaa et al. 2010; Titration potentiometric; Calculated; Alkalinity anomaly technique Smith and Key, 1975; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Bory; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.717469; https://doi.pangaea.de/10.1594/PANGAEA.717469

Community metabolism and air-sea carbon dioxide (CO2) fluxes were investigated in July 1992 on a fringing reef at Moorea (French Polynesia). The benthic community was dominated by macroalgae (85% substratum cover) and comprised of Phaeophyceae Padina tenuis (Bory), Turbinaria ornata (Turner) J. Agardh, and Hydroclathrus clathratus Bory (Howe); Chlorophyta Halimeda incrassata f. ovata J. Agardh (Howe); and Ventricaria ventricosa J. Agardh (Olsen et West), as well as several Rhodophyta (Actinotrichia fragilis Forskál (Børgesen) and several species of encrusting coralline algae). Algal biomass was 171 g dry weight/m**2. Community gross production (Pg), respiration (R), and net calcification (G) were measured in an open-top enclosure. Pg and R were respectively 248 and 240 mmol Co2/m**2/d, and there was a slight net dissolution of CaCO3 (0.8 mmol/m**2/d). This site was a sink for atmospheric CO2 (10 ± 4 mmol CO2/m**2/d), and the analysis of data from the literature suggests that this is a general feature of algal-dominated reefs. Measurement of air-sea CO2 fluxes in open water close to the enclosure demonstrated that changes in small-scale hydrodynamics can lead to misleading conclusions. Net CO2 evasion to the atmosphere was measured on the fringing reef due to changes in the current pattern that drove water from the barrier reef (a C02 source) to the study site. : 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).