Maintained larval growth in mussel larvae exposed to acidified undersaturated seawater, supplement to: Ventura, Alexander; Schulz, Sabrina; Dupont, Sam (2016): Maintained larval growth in mussel larvae exposed to acidified under-saturated seawater. Scientific Reports, 6, 23728

• Main Authors: Ventura, Alexander, Schulz, Sabrina, Dupont, Sam
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2016
• Subjects: Animalia; Behaviour; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Mollusca; Mortality/Survival; Mytilus edulis; North Atlantic; Pelagos; Single species; Temperate; Zooplankton; Type; Species; Registration number of species; Uniform resource locator/link to reference; Figure; Treatment; pH; Mortality; Abnormality; Growth rate; Feeding rate per individual; Feeding rate, standard error; Calcification rate; Calcification rate, standard error; Dissolution rate; Dissolution rate, standard error; Incubation duration; Length; Alkalinity, total; Temperature, water; Salinity; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Experiment; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.861987; https://doi.pangaea.de/10.1594/PANGAEA.861987

Ocean acidification (OA) is known to affect bivalve early life-stages. We tested responses of blue mussel larvae to a wide range of pH in order to identify their tolerance threshold. Our results confirmed that decreasing seawater pH and decreasing saturation state increases larval mortality rate and the percentage of abnormally developing larvae. Virtually no larvae reared at average pHT 7.16 were able to feed or reach the D-shell stage and their development appeared to be arrested at the trochophore stage. However larvae were capable of reaching the D-shell stage under milder acidification (pHT=7.35, 7.6, 7.85) including in under-saturated seawater with omega Aragonite as low as 0.54±0.01 (mean±s. e. m.), with a tipping point for normal development identified at pHT 7.765. Additionally growth rate of normally developing larvae was not affected by lower pHT despite potential increased energy costs associated with compensatory calcification in response to increased shell dissolution. Overall, our results on OA impacts on mussel larvae suggest an average pHT of 7.16 is beyond their physiological tolerance threshold and indicate a shift in energy allocation towards growth in some individuals revealing potential OA resilience. : In table 1 of the paper, "7.80 ± 0.031" in the column of measured pH is a spelling mistake, the correct value is "7.86± 0.031". This spelling mistake only applies to this table and does not affect analyses in any way.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 2016-06-24.