Seawater carbonate chemistry and hypoxia tolerance and blood chemistry characteristics of European sea bass ...

• Main Authors: Montgomery, Daniel W, Simpson, Stephen D, Engelhard, Georg H, Birchenough, Silvana N R, Wilson, Rod W
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Acid-base regulation; Animalia; Brackish waters; Chordata; Containers and aquaria 20-1000 L or < 1 m**2; Dicentrarchus labrax; Laboratory experiment; Nekton; North Atlantic; Other studied parameter or process; Oxygen; Pelagos; Respiration; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; Treatment; Identification; Mass; Date; Temperature, water; Temperature, water, standard deviation; Oxygen saturation; Oxygen, partial pressure, critical; Metabolic rate, standard; Covariance; Oxygen, partial pressure; Blood, ph; Carbon dioxide, partial pressure, blood; Blood, partial pressure of carbon dioxide; Blood, bicarbonate, blood; Half saturation partial pressure of oxygen; Hill coefficient; Haematocrit; Salinity; Salinity, standard deviation; pH; pH, standard deviation; Oxygen saturation, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Time in hours; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.914653; https://doi.pangaea.de/10.1594/PANGAEA.914653

Global environmental change is increasing hypoxia in aquatic ecosystems. During hypoxic events, bacterial respiration causes an increase in carbon dioxide (CO2) while oxygen (O2) declines. This is rarely accounted for when assessing hypoxia tolerances of aquatic organisms. We investigated the impact of environmentally realistic increases in CO2 on responses to hypoxia in European sea bass (Dicentrarchus labrax). We conducted a critical oxygen (O2crit) test, a common measure of hypoxia tolerance, using two treatments in which O2 levels were reduced with constant ambient CO2 levels (~530 µatm), or with reciprocal increases in CO2 (rising to ~2,500 µatm). We also assessed blood acid-base chemistry and haemoglobin-O2 binding affinity of sea bass in hypoxic conditions with ambient (~650 μatm) or raised CO2 (~1770 μatm) levels. Sea bass exhibited greater hypoxia tolerance (~20% reduced O2crit), associated with increased haemoglobin-O2 affinity (~32% fall in P50) of red blood cells, when exposed to reciprocal ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) 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 by seacarb is 2020-04-02. ...