Impact of medium-term exposure to elevated pCO2 levels on the physiological energetics of the mussel Mytilus chilensis
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| Sprache: | en |
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PANGAEA
2013
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| author | Navarro, Jorge M Torres, Rodrigo Acuña, Karin Duarte, Cristian Manríquez, Patricio H Lardies, Marco A Lagos, Nelson A Vargas, Cristian A Aguilera, Victor M |
| author_facet | Navarro, Jorge M Torres, Rodrigo Acuña, Karin Duarte, Cristian Manríquez, Patricio H Lardies, Marco A Lagos, Nelson A Vargas, Cristian A Aguilera, Victor M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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 of the mussels resulted in a significant reduction of energy available for growth (scope for growth) with important consequences for the aquaculture of this species during medium-term exposure to acid conditions. The results of this study clearly indicate that high pCO2 levels in the seawater have a negative effect on the health of M. chilensis. Therefore, the predicted acidification of seawater associated with global climate change could be harmful to this ecologically and commercially important mussel. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_835645 |
| institution | PANGAEA |
| language | en |
| publishDate | 2013 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Impact of medium-term exposure to elevated pCO2 levels on the physiological energetics of the mussel Mytilus chilensis Navarro, Jorge M Torres, Rodrigo Acuña, Karin Duarte, Cristian Manríquez, Patricio H Lardies, Marco A Lagos, Nelson A Vargas, Cristian A Aguilera, Victor M Absorption efficiency; Absorption efficiency, standard error; Absorption rate; Absorption rate, standard error; Alkalinity, total; Alkalinity, total, standard error; Ammonia excretion, standard error; Ammonia excretion per individual; Animalia; Aragonite saturation state; Aragonite saturation state, standard error; Behaviour; Benthic animals; Benthos; Bicarbonate ion; Calcite saturation state; Calcite saturation state, standard error; Calculated; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate ion, standard error; Carbonate system computation flag; Carbon dioxide; Clearance rate, standard error; Clearance rate per individual; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Ingestion rate; Ingestion rate, standard error; Laboratory experiment; Mollusca; Mytilus chilensis; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Other metabolic rates; 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; pH, standard error; pH, total scale; Potentiometric; Potentiometric titration; Respiration; Respiration rate, oxygen, per individual; Respiration rate, oxygen, standard error; Salinity; Salinity, standard error; Scope for growth; Scope for growth, standard error; Single species; South Pacific; Species; Temperate; Temperature, water; Temperature, water, standard error; Treatment; Yaldad_Bay 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 of the mussels resulted in a significant reduction of energy available for growth (scope for growth) with important consequences for the aquaculture of this species during medium-term exposure to acid conditions. The results of this study clearly indicate that high pCO2 levels in the seawater have a negative effect on the health of M. chilensis. Therefore, the predicted acidification of seawater associated with global climate change could be harmful to this ecologically and commercially important mussel. |
| title | Impact of medium-term exposure to elevated pCO2 levels on the physiological energetics of the mussel Mytilus chilensis |
| topic | Absorption efficiency; Absorption efficiency, standard error; Absorption rate; Absorption rate, standard error; Alkalinity, total; Alkalinity, total, standard error; Ammonia excretion, standard error; Ammonia excretion per individual; Animalia; Aragonite saturation state; Aragonite saturation state, standard error; Behaviour; Benthic animals; Benthos; Bicarbonate ion; Calcite saturation state; Calcite saturation state, standard error; Calculated; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate ion, standard error; Carbonate system computation flag; Carbon dioxide; Clearance rate, standard error; Clearance rate per individual; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Ingestion rate; Ingestion rate, standard error; Laboratory experiment; Mollusca; Mytilus chilensis; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Other metabolic rates; 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; pH, standard error; pH, total scale; Potentiometric; Potentiometric titration; Respiration; Respiration rate, oxygen, per individual; Respiration rate, oxygen, standard error; Salinity; Salinity, standard error; Scope for growth; Scope for growth, standard error; Single species; South Pacific; Species; Temperate; Temperature, water; Temperature, water, standard error; Treatment; Yaldad_Bay |
| url | https://doi.org/10.1594/PANGAEA.835645 |