Data related to biogenic dissolution rates quantified in various carbonate substrates exposed to ocean acidification at Ischia (Italy) and Faial (Azores) ...

• Main Authors: Tribollet, Aline, Grange, Julie, Para, Hugo, Rodolfo-Metalpa, Riccardo, Carreiro-Silva, Marina
• Format: Dataset
• Language: unknown
• Published: SEANOE 2017
• Subjects: carbonate dissolution; microborers; euendolithic flora; CO2 vents; ocean acidification; biogenic dissolution; temperate-cold coastal systems; Ischia Island; Faial Island; bioerosion; mollusk shells; coral skeletons; Ocean acidification
• Online Access: https://dx.doi.org/10.17882/51167; https://www.seanoe.org/data/00400/51167/

Recent studies carried out in coral reef settings or under controlled conditions showed that rising aqueous pCO2 (pH ≥ 7.8 – 7.9, and a saturation state of carbonate minerals > 1) stimulates the growth of reef microboring or euendolithic phototrophs, especially microalgae, and therefore, enhance rates of biogenic dissolution of carbonates. Those micro-organisms play a major role in reef bioerosion and coral reef functioning. In temperate-cold carbonate ecosystems, carbonate dissolution by euendolithic microflora has never been investigated under natural ocean acidification conditions. We thus realized two experiments to investigate the effects of low pH (and saturation states) on early natural microboring communities colonizing various carbonates and their associated rates of biogenic dissolution. One was carried out at Ischia (Italy) with mollusk shells exposed at two CO2 vents (pH < 7.5) vs an ambient site (pH ~ 8) during six months. The other one was realized at Faial (Azores) with various carbonate ...