Impact of medium-term exposure to elevated pCO2 levels on the physiological energetics of the mussel Mytilus chilensis ...

• Main Authors: Navarro, Jorge M, Torres, Rodrigo, Acuña, Karin, Duarte, Cristian, Manríquez, Patricio H, Lardies, Marco A, Lagos, Nelson A, Vargas, Cristian A, Aguilera, Victor M
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Animalia; Behaviour; Benthic animals; Benthos; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Growth/Morphology; Laboratory experiment; Mollusca; Mytilus chilensis; Other metabolic rates; Respiration; Single species; South Pacific; Temperate; Species; Treatment; Clearance rate per individual; Clearance rate, standard error; Scope for growth; Scope for growth, standard error; Ammonia excretion per individual; Ammonia excretion, standard error; Respiration rate, oxygen, per individual; Respiration rate, oxygen, standard error; Absorption efficiency; Absorption efficiency, standard error; Absorption rate; Absorption rate, standard error; Ingestion rate; Ingestion rate, standard error; pH; pH, standard error; Salinity; Salinity, standard error; Temperature, water; Temperature, water, standard error; Alkalinity, total; Alkalinity, total, standard error; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air, standard error; Carbonate ion; Carbonate ion, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Calcite saturation state; Calcite saturation state, standard error; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.835645; https://doi.pangaea.de/10.1594/PANGAEA.835645

This study evaluated the impact of medium-term exposure to elevated pCO2 levels (750-1200 ppm) on the physiological processes of juvenile Mytilus chilensis mussels over a period of 70 d in a mesocosm system. Three equilibration tanks filled with filtered seawater were adjusted to three pCO2 levels: 380 (control), 750 and 1200 ppm by bubbling air or an air-CO2 mixture through the water. For the control, atmospheric air (with aprox. 380 ppm CO2) was bubbled into the tank; for the 750 and 1200 ppm treatments, dry air and pure CO2 were blended to each target concentration using mass flow controllers for air and CO2. No impact on feeding activity was observed at the beginning of the experiment, but a significant reduction in clearance rate was observed after 35 d of exposure to highly acidified seawater. Absorption rate and absorption efficiency were reduced at high pCO2 levels. In addition, oxygen uptake fell significantly under these conditions, indicating a metabolic depression. These physiological responses ... : 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 2014-09-10. ...