Nighttime dissolution in a temperate coastal ocean ecosystem increases under acidification, supplement to: Kwiatkowski, Lester; Gaylord, B; Hill, Tessa M; Hosfelt, J D; Kroeker, Kristy J; Nebuchina, Yana; Ninokawa, Aaron; Russell, Ann D; Rivest, Emily B; Sesboüé, Marine; Caldeira, Ken (2016): Nighttime dissolution in a temperate coastal ocean ecosystem increases under acidification. Scientific Reports, 6, 22984

• Main Authors: Kwiatkowski, Lester, Gaylord, B, Hill, Tessa M, Hosfelt, J D, Kroeker, Kristy J, Nebuchina, Yana, Ninokawa, Aaron, Russell, Ann D, Rivest, Emily B, Sesboüé, Marine, Caldeira, Ken
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2016
• Subjects: Benthos; Calcification/Dissolution; Coast and continental shelf; Entire community; Field observation; North Pacific; Primary production/Photosynthesis; Rocky-shore community; Temperate; Type; Identification; Time of day; Calcification rate of calcium carbonate; Net photosynthesis rate; Alkalinity, total; Carbon, inorganic, dissolved; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbonate ion; Aragonite saturation state; Calcite saturation state; Temperature, water; Salinity; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Experiment; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Lester; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.864039; https://doi.pangaea.de/10.1594/PANGAEA.864039

Anthropogenic emissions of carbon dioxide (CO2) are causing ocean acidification, lowering seawater aragonite (CaCO3) saturation state (Omega arag), with potentially substantial impacts on marine ecosystems over the 21st Century. Calcifying organisms have exhibited reduced calcification under lower saturation state conditions in aquaria. However, the in situ sensitivity of calcifying ecosystems to future ocean acidification remains unknown. Here we assess the community level sensitivity of calcification to local CO2-induced acidification caused by natural respiration in an unperturbed, biodiverse, temperate intertidal ecosystem. We find that on hourly timescales nighttime community calcification is strongly influenced by Omega arag, with greater net calcium carbonate dissolution under more acidic conditions. Daytime calcification however, is not detectably affected by Omega arag. If the short-term sensitivity of community calcification to Omega arag is representative of the long-term sensitivity to ocean acidification, nighttime dissolution in these intertidal ecosystems could more than double by 2050, with significant ecological and economic consequences. : 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 2016-08-24.