Galápagos coral reef persistence after ENSO warming across an acidification gradient, supplement to: Manzello, Derek P; Enochs, I C; Bruckner, Andrew; Renaud, Philip G; Kolodziej, Graham; Budd, David A; Carlton, R; Glynn, Peter W (2014): Galápagos coral reef persistence after ENSO warming across an acidification gradient. Geophysical Research Letters, 41(24), 9001-9008

• Main Authors: Manzello, Derek P, Enochs, I C, Bruckner, Andrew, Renaud, Philip G, Kolodziej, Graham, Budd, David A, Carlton, R, Glynn, Peter W
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2014
• Subjects: Benthos; Biomass/Abundance/Elemental composition; Calcification/Dissolution; Coast and continental shelf; Entire community; Field observation; Growth/Morphology; Rocky-shore community; South Pacific; Temperature; Tropical; Table; Site; Replicates; Date/time start; Date/time end; DEPTH, water; Depth, water, standard error; Extension rate; Extension rate, standard error; Density; Density, standard error; Calcification rate; Calcification rate, standard error; Phosphorus/Calcium ratio; Phosphorus/Calcium ratio, standard error; Temperature, water; Salinity; Alkalinity, total; Carbon, inorganic, dissolved; Partial pressure of carbon dioxide water at sea surface temperature wet air; pH; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Calcite saturation state; Potentiometric titration; Coulometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Pacific; Renaud; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.847762; https://doi.pangaea.de/10.1594/PANGAEA.847762

Anthropogenic CO2 is causing warming and ocean acidification. Coral reefs are being severely impacted, yet confusion lingers regarding how reefs will respond to these stressors over this century. Since the 1982-1983 El Niño-Southern Oscillation warming event, the persistence of reefs around the Galápagos Islands has differed across an acidification gradient. Reefs disappeared where pH<8.0 and aragonite saturation state (Omega arag)<=3 and have not recovered, whereas one reef has persisted where pH>8.0 and Omega arag>3. Where upwelling is greatest, calcification by massive Porites is higher than predicted by a published relationship with temperature despite high CO2, possibly due to elevated nutrients. However, skeletal P/Ca, a proxy for phosphate exposure, negatively correlates with density (R=-0.822, p<0.0001). We propose that elevated nutrients have the potential to exacerbate acidification by depressing coral skeletal densities and further increasing bioerosion already accelerated by low pH. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 2015-07-03.