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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2012
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| Online Access: | https://doi.org/10.1594/PANGAEA.951106 |
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| _version_ | 1867171882157998080 |
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| author | Van Colen, Carl Debusschere, Elisabeth Braeckman, Ulrike Van Gansbeke, Dirk Vincx, Magda |
| author_facet | Van Colen, Carl Debusschere, Elisabeth Braeckman, Ulrike Van Gansbeke, Dirk Vincx, Magda |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This study investigated the effects of experimentally manipulated seawater carbonate chemistry on several early life history processes of the Baltic tellin (Macoma balthica), a widely distributed bivalve that plays a critical role in the functioning of many coastal habitats. We demonstrate that ocean acidification significantly depresses fertilization, embryogenesis, larval development and survival during the pelagic phase. Fertilization and the formation of a D-shaped shell during embryogenesis were severely diminished: successful fertilization was reduced by 11% at a 0.6 pH unit decrease from present (pH 8.1) conditions, while hatching success was depressed by 34 and 87%, respectively at a 0.3 and 0.6 pH unit decrease. Under acidified conditions, larvae were still able to develop a shell during the post-embryonic phase, but higher larval mortality rates indicate that fewer larvae may metamorphose and settle in an acidified ocean. The cumulative impact of decreasing seawater pH on fertilization, embryogenesis and survival to the benthic stage is estimated to reduce the number of competent settlers by 38% for a 0.3 pH unit decrease, and by 89% for a 0.6 pH unit decrease from present conditions. Additionally, slower growth rates and a delayed metamorphosis at a smaller size were indicative for larvae developed under acidified conditions. This may further decline the recruit population size due to a longer subjection to perturbations, such as predation, during the pelagic phase. In general, early life history processes were most severely compromised at ~pH 7.5, which corresponds to seawater undersaturated with respect to aragonite. Since recent models predict a comparable decrease in pH in coastal waters in the near future, this study indicates that future populations of Macoma balthica are likely to decline as a consequence of ongoing ocean acidification. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_951106 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seawater carbonate chemistry and early life history processes of the Baltic tellin (Macoma balthica) Van Colen, Carl Debusschere, Elisabeth Braeckman, Ulrike Van Gansbeke, Dirk Vincx, Magda Age; Alkalinity, total; Animalia; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Brackish waters; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Development; Egg hatching success; EXP; Experiment; Fertilization success rate; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Laboratory experiment; Macoma balthica; Metamorphosis rate; Mollusca; Mortality; Mortality/Survival; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Percentage; pH, NBS scale; pH, total scale; Potentiometric; Potentiometric titration; Reproduction; Salinity; Single species; Size; Species, unique identification; Survival; Temperate; Temperature, water; Treatment; Type; Westerschelde_estuary; Zooplankton This study investigated the effects of experimentally manipulated seawater carbonate chemistry on several early life history processes of the Baltic tellin (Macoma balthica), a widely distributed bivalve that plays a critical role in the functioning of many coastal habitats. We demonstrate that ocean acidification significantly depresses fertilization, embryogenesis, larval development and survival during the pelagic phase. Fertilization and the formation of a D-shaped shell during embryogenesis were severely diminished: successful fertilization was reduced by 11% at a 0.6 pH unit decrease from present (pH 8.1) conditions, while hatching success was depressed by 34 and 87%, respectively at a 0.3 and 0.6 pH unit decrease. Under acidified conditions, larvae were still able to develop a shell during the post-embryonic phase, but higher larval mortality rates indicate that fewer larvae may metamorphose and settle in an acidified ocean. The cumulative impact of decreasing seawater pH on fertilization, embryogenesis and survival to the benthic stage is estimated to reduce the number of competent settlers by 38% for a 0.3 pH unit decrease, and by 89% for a 0.6 pH unit decrease from present conditions. Additionally, slower growth rates and a delayed metamorphosis at a smaller size were indicative for larvae developed under acidified conditions. This may further decline the recruit population size due to a longer subjection to perturbations, such as predation, during the pelagic phase. In general, early life history processes were most severely compromised at ~pH 7.5, which corresponds to seawater undersaturated with respect to aragonite. Since recent models predict a comparable decrease in pH in coastal waters in the near future, this study indicates that future populations of Macoma balthica are likely to decline as a consequence of ongoing ocean acidification. |
| title | Seawater carbonate chemistry and early life history processes of the Baltic tellin (Macoma balthica) |
| topic | Age; Alkalinity, total; Animalia; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Brackish waters; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Development; Egg hatching success; EXP; Experiment; Fertilization success rate; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Laboratory experiment; Macoma balthica; Metamorphosis rate; Mollusca; Mortality; Mortality/Survival; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Percentage; pH, NBS scale; pH, total scale; Potentiometric; Potentiometric titration; Reproduction; Salinity; Single species; Size; Species, unique identification; Survival; Temperate; Temperature, water; Treatment; Type; Westerschelde_estuary; Zooplankton |
| url | https://doi.org/10.1594/PANGAEA.951106 |