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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2018
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| Online Access: | https://doi.org/10.1594/PANGAEA.902088 |
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| _version_ | 1867171862877831168 |
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| author | Ab Lah, Roslizawati Kelaher, Brendan P Bucher, Daniel Benkendorff, Kirsten |
| author_facet | Ab Lah, Roslizawati Kelaher, Brendan P Bucher, Daniel Benkendorff, Kirsten |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Rising levels of atmospheric carbon dioxide are driving ocean warming and acidification. This could cause stress resulting in decreases in nutritional quality of marine species for human consumption, if environmental changes go beyond the optimal range for harvested species. To evaluate this, we used ambient and near-future elevated temperatures and pCO2 to assess impacts on the proximate nutritional composition (moisture, ash, protein, and lipids), fatty acids and trace elements of the foot tissue of Turbo militaris, a commercially harvested marine snail from south-eastern Australia. In a fully orthogonal design, the snails were exposed to ambient seawater conditions (22 ± 0.2 °C, pH 8.13 ± 0.01–450 μatm pCO2), ocean warming (25 ± 0.05 °C), pCO2 ocean acidification (pH 7.85 ± 0.02, ∼880 μatm pCO2) or a combination of both in controlled flow-through seawater mesocosms for 38 days. Moisture, ash, protein and total lipid content of the foot tissue in the turban snails was unaffected by ocean warming or acidification. However, ocean warming caused a reduction in healthful polyunsaturated fatty acids (PUFA) relative to saturated fatty acids (SFA). Under future warming and acidification conditions, there was a significant 3–5% decrease in n–3 fatty acids, which contributed to a decrease in the n–3/n–6 fatty acid ratio. The decrease in n–3 PUFAs, particularly Eicopentanoic acid (EPA), is a major negative outcome from ocean warming, because higher n–3/n–6 ratios in seafood are desirable for human health. Furthermore, ocean warming was found to increase levels of zinc in the tissues. Calcium, iron, macroelements, microelements and the composition of toxic elements did not appear to be affected by ocean climate change. Overall, the major impact from ocean climate change on seafood quality is likely to be a decrease in healthy polyunsaturated fatty acids at higher temperatures. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_902088 |
| institution | PANGAEA |
| language | en |
| publishDate | 2018 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seawater carbonate chemistry and the nutritional quality of the commercially-harvested turbinid snail Turbo militaris Ab Lah, Roslizawati Kelaher, Brendan P Bucher, Daniel Benkendorff, Kirsten Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Ash; Ash, standard error; Benthic animals; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Biomass/Abundance/Elemental composition; Calcite saturation state; Calcite saturation state, standard deviation; 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; Coffs_Harbour; Condition index; Condition index, standard error; Elements; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Lipids; Lipids, standard error; Macroelements, per fresh mass; Macroelements, standard error; Meat yield; Meat yield, standard error; Mesocosm or benthocosm; Microelements, per fresh mass; Microelements, standard error; Moisture; Moisture, standard error; Mollusca; Name; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Percentage; Percentage, standard error; pH, NBS scale; pH, standard deviation; pH, total scale; Proteins; Proteins, standard error; Registration number of species; Salinity; Single species; South Pacific; Species; Temperate; Temperature; Temperature, water; Temperature, water, standard deviation; Toxic elements, per fresh mass; Toxic elements, standard error; Treatment; Turbo militaris; Type; Uniform resource locator/link to reference Rising levels of atmospheric carbon dioxide are driving ocean warming and acidification. This could cause stress resulting in decreases in nutritional quality of marine species for human consumption, if environmental changes go beyond the optimal range for harvested species. To evaluate this, we used ambient and near-future elevated temperatures and pCO2 to assess impacts on the proximate nutritional composition (moisture, ash, protein, and lipids), fatty acids and trace elements of the foot tissue of Turbo militaris, a commercially harvested marine snail from south-eastern Australia. In a fully orthogonal design, the snails were exposed to ambient seawater conditions (22 ± 0.2 °C, pH 8.13 ± 0.01–450 μatm pCO2), ocean warming (25 ± 0.05 °C), pCO2 ocean acidification (pH 7.85 ± 0.02, ∼880 μatm pCO2) or a combination of both in controlled flow-through seawater mesocosms for 38 days. Moisture, ash, protein and total lipid content of the foot tissue in the turban snails was unaffected by ocean warming or acidification. However, ocean warming caused a reduction in healthful polyunsaturated fatty acids (PUFA) relative to saturated fatty acids (SFA). Under future warming and acidification conditions, there was a significant 3–5% decrease in n–3 fatty acids, which contributed to a decrease in the n–3/n–6 fatty acid ratio. The decrease in n–3 PUFAs, particularly Eicopentanoic acid (EPA), is a major negative outcome from ocean warming, because higher n–3/n–6 ratios in seafood are desirable for human health. Furthermore, ocean warming was found to increase levels of zinc in the tissues. Calcium, iron, macroelements, microelements and the composition of toxic elements did not appear to be affected by ocean climate change. Overall, the major impact from ocean climate change on seafood quality is likely to be a decrease in healthy polyunsaturated fatty acids at higher temperatures. |
| title | Seawater carbonate chemistry and the nutritional quality of the commercially-harvested turbinid snail Turbo militaris |
| topic | Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Ash; Ash, standard error; Benthic animals; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Biomass/Abundance/Elemental composition; Calcite saturation state; Calcite saturation state, standard deviation; 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; Coffs_Harbour; Condition index; Condition index, standard error; Elements; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Lipids; Lipids, standard error; Macroelements, per fresh mass; Macroelements, standard error; Meat yield; Meat yield, standard error; Mesocosm or benthocosm; Microelements, per fresh mass; Microelements, standard error; Moisture; Moisture, standard error; Mollusca; Name; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Percentage; Percentage, standard error; pH, NBS scale; pH, standard deviation; pH, total scale; Proteins; Proteins, standard error; Registration number of species; Salinity; Single species; South Pacific; Species; Temperate; Temperature; Temperature, water; Temperature, water, standard deviation; Toxic elements, per fresh mass; Toxic elements, standard error; Treatment; Turbo militaris; Type; Uniform resource locator/link to reference |
| url | https://doi.org/10.1594/PANGAEA.902088 |