Seawater carbonate chemistry and biological processes of Mytilus edulis during experiments, 2010
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2010
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| _version_ | 1867169034686955520 |
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| author | Thomsen, Jörn Melzner, Frank |
| author_facet | Thomsen, Jörn Melzner, Frank |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Marine organisms are exposed to increasingly acidic oceans, as a result of equilibration of surface ocean water with rising atmospheric CO2 concentrations. In this study, we examined the physiological response of Mytilus edulis from the Baltic Sea, grown for 2 months at 4 seawater pCO2 levels (39, 113, 243 and 405 Pa/385, 1,120, 2,400 and 4,000 µatm). Shell and somatic growth, calcification, oxygen consumption and excretion rates were measured in order to test the hypothesis whether exposure to elevated seawater pCO2 is causally related to metabolic depression. During the experimental period, mussel shell mass and shell-free dry mass (SFDM) increased at least by a factor of two and three, respectively. However, shell length and shell mass growth decreased linearly with increasing pCO2 by 6-20 and 10-34%, while SFDM growth was not significantly affected by hypercapnia. We observed a parabolic change in routine metabolic rates with increasing pCO2 and the highest rates (+60%) at 243 Pa. excretion rose linearly with increasing pCO2. Decreased O:N ratios at the highest seawater pCO2 indicate enhanced protein metabolism which may contribute to intracellular pH regulation. We suggest that reduced shell growth under severe acidification is not caused by (global) metabolic depression but is potentially due to synergistic effects of increased cellular energy demand and nitrogen loss. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_756663 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seawater carbonate chemistry and biological processes of Mytilus edulis during experiments, 2010 Thomsen, Jörn Melzner, Frank Alkalinity, total; Alkalinity, total, standard deviation; Ammonium, excretion; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calcite saturation state, standard deviation; Calculated, see reference(s); Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Identification; Intermittent-flow system; Laboratory experiment; Measured; Mollusca; Mytilus edulis; Mytilus edulis, biomass, dry mass; Mytilus edulis, shell length; Mytilus edulis, shell mass; Nitrogen/Oxygen ratio; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Other metabolic rates; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH, NBS scale; pH, standard deviation; pH, total scale; Potentiometric titration, Marianda, VINDTA; Respiration; Respiration rate, oxygen; Salinity; Salinity, standard deviation; Single species; SOMMA autoanalyzer; Temperate; Temperature, standard deviation; Temperature, water; WTW 315i salinometer and WTW TETRACON 325 probe Marine organisms are exposed to increasingly acidic oceans, as a result of equilibration of surface ocean water with rising atmospheric CO2 concentrations. In this study, we examined the physiological response of Mytilus edulis from the Baltic Sea, grown for 2 months at 4 seawater pCO2 levels (39, 113, 243 and 405 Pa/385, 1,120, 2,400 and 4,000 µatm). Shell and somatic growth, calcification, oxygen consumption and excretion rates were measured in order to test the hypothesis whether exposure to elevated seawater pCO2 is causally related to metabolic depression. During the experimental period, mussel shell mass and shell-free dry mass (SFDM) increased at least by a factor of two and three, respectively. However, shell length and shell mass growth decreased linearly with increasing pCO2 by 6-20 and 10-34%, while SFDM growth was not significantly affected by hypercapnia. We observed a parabolic change in routine metabolic rates with increasing pCO2 and the highest rates (+60%) at 243 Pa. excretion rose linearly with increasing pCO2. Decreased O:N ratios at the highest seawater pCO2 indicate enhanced protein metabolism which may contribute to intracellular pH regulation. We suggest that reduced shell growth under severe acidification is not caused by (global) metabolic depression but is potentially due to synergistic effects of increased cellular energy demand and nitrogen loss. |
| title | Seawater carbonate chemistry and biological processes of Mytilus edulis during experiments, 2010 |
| topic | Alkalinity, total; Alkalinity, total, standard deviation; Ammonium, excretion; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calcite saturation state, standard deviation; Calculated, see reference(s); Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Identification; Intermittent-flow system; Laboratory experiment; Measured; Mollusca; Mytilus edulis; Mytilus edulis, biomass, dry mass; Mytilus edulis, shell length; Mytilus edulis, shell mass; Nitrogen/Oxygen ratio; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Other metabolic rates; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH, NBS scale; pH, standard deviation; pH, total scale; Potentiometric titration, Marianda, VINDTA; Respiration; Respiration rate, oxygen; Salinity; Salinity, standard deviation; Single species; SOMMA autoanalyzer; Temperate; Temperature, standard deviation; Temperature, water; WTW 315i salinometer and WTW TETRACON 325 probe |
| url | https://doi.org/10.1594/PANGAEA.756663 |