Seawater carbonate chemistry and community metabolism during an experiment with a coral reef, 2003 ...

• Main Authors: Langdon, Chris, Broecker, Wallace S, Hammond, Douglas E, Glenn, Edward, Fitzsimmons, Kevin, Nelson, Steven G, Peng, Tsung-Hung, Hajdas, Irka, Bonani, Georges
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: Benthos; Coast and continental shelf; Entire community; Laboratory experiment; Mesocosm or benthocosm; Not applicable; Primary production/Photosynthesis; Respiration; Rocky-shore community; Tropical; Date; Carbonate system computation flag; Temperature, water; Salinity; pH; Alkalinity, total; Carbon, inorganic, dissolved; Carbon dioxide; Bicarbonate ion; Carbonate ion; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Calcite saturation state; Respiration rate, community; Net community production of carbon; Integrated net community production of oxygen; Gross photosynthesis rate; Calcium; Nitrate; Ammonium; Phosphate; Oxygen; Experiment; Calculated using seacarb after Nisumaa et al. 2010; CTD, Sea-Bird; Alkalinity, Gran titration Gran, 1950; Accelerator mass spectrometry AMS; Infrared gas analyzer LI-COR LI-6252; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.721740; https://doi.pangaea.de/10.1594/PANGAEA.721740

The effect of elevated pCO2 on the metabolism of a coral reef community dominated by macroalgae has been investigated utilizing the large 2650 m3 coral reef mesocosm at the Biosphere-2 facility near Tucson, Arizona. The carbonate chemistry of the water was manipulated to simulate present-day and a doubled CO2 future condition. Each experiment consisted of a 1-2 month preconditioning period followed by a 7-9 day observational period. The pCO2 was 404 ± 63 ?atm during the present-day pCO2 experiment and 658 ± 59 ?atm during the elevated pCO2 experiment. Nutrient levels were low and typical of natural reefs waters (NO3? 0.5-0.9 ?M, NH4+ 0.4 ?M, PO43? 0.07-0.09 ?M). The temperature and salinity of the water were held constant at 26.5 ± 0.2°C and 34.4 ± 0.2 ppt. Photosynthetically available irradiance was 10 ± 2 during the present-day experiment and 7.4 ± 0.5 mol photons m?2 d?1 during the elevated pCO2 experiment. The primary producer biomass in the mesocosm was dominated by four species of macroalgae; Haptilon ... : 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). ...