Elevated pCO2 causes developmental delay in early larval Pacific oysters, Crassostrea gigas

• Main Authors: Timmins-Schiffman, Emma, O'Donnell, Michael J, Friedman, Carolyn S, Roberts, Steven B
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2013
• Subjects: Animalia; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Crassostrea gigas; Growth/Morphology; Laboratory experiment; Mollusca; North Pacific; Pelagos; Single species; Temperate; Zooplankton; Species; Treatment; Figure; Date; Duration, number of days; Identification; Length; Height; Larvae; Proportion; Temperature, water; Salinity; Alkalinity, total; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Calcite saturation state; Aragonite saturation state; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbon, inorganic, dissolved; Experiment; Potentiometric titration; Potentiometric; Spectrophotometric; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Pacific; Ocean acidification; Pacific oyster
• Online Access: https://dx.doi.org/10.1594/pangaea.835714; https://doi.pangaea.de/10.1594/PANGAEA.835714

Increasing atmospheric CO2 equilibrates with surface seawater, elevating the concentration of aqueous hydrogen ions. This process, ocean acidification, is a future and contemporary concern for aquatic organisms, causing failures in Pacific oyster (Crassostrea gigas) aquaculture. This experiment determines the effect of elevated pCO2 on the early development of C. gigas larvae from a wild Pacific Northwest population. Adults were collected from Friday Harbor, Washington, USA (48°31.7' N, 12°1.1' W) and spawned in July 2011. Larvae were exposed to Ambient (400 µatm CO2), MidCO2 (700 µatm), or HighCO2 (1,000 µatm). After 24 h, a greater proportion of larvae in the HighCO2 treatment were calcified as compared to Ambient. This unexpected observation is attributed to increased metabolic rate coupled with sufficient energy resources. Oyster larvae raised at HighCO2 showed evidence of a developmental delay by 3 days post-fertilization, which resulted in smaller larvae that were less calcified. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 2014-09-11.