Publication Date:
2024-03-15
Description:
This study investigated the combined effects of reduced pH and increased temperature on the capacities of the Pacific cupped oyster Crassostrea gigas to bioconcentrate radionuclide and metals. Oysters were exposed to dissolved radiotracers (110mAg, 241Am, 109Cd,57Co,54Mn, and 65Zn) at three pH (7.5, 7.8, 8.1) and two temperatures (21 and 24°C) under controlled laboratory conditions. Although calcifying organisms are recognized as particularly vulnerable to ocean acidification, the oyster did not accumulate differently the studied metals when exposed under the different pH conditions. However, temperature alone or in combination with pH somewhat altered the bioaccumulation of the studied elements. At pH 7.5, Cd was accumulated with an uptake rate constant twofold higher at 24°C than 21°C. Bioaccumulation of Mn was significantly affected by an interactive effect between seawater pH and temperature, with a decreased uptake rate at pH 7.5 when temperature increased (27 ± 1 vs. 17 ± 1 /day at 21 and 24°C, respectively). Retention of Co and Mn tended also to decrease at the same pH with decreasing temperature. Neither pH nor temperature affected strongly the elements distribution between shell and soft tissues. Significant effects of pH were found on the bioaccessibility of Mn, Zn, and 241Am during experimental in vitro simulation of human digestion.
Keywords:
Activity; Activity, standard deviation; Alkalinity, total; Americium-241, activity, normalized; Americium-241, concentration factors; Americium-241, standard deviation; Americium-241 activity per mass; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Biomass/Abundance/Elemental composition; Cadmium-109, activity; Cadmium-109, activity, normalized; Cadmium-109, activity, normalized, standard deviation; Cadmium-109, concentration factors; Caesium-134, activity, normalized; Caesium-134, concentration factors; Caesium-134 activity per mass; Calcite saturation state; Calculated using seacarb; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Cobalt-57, activity; Cobalt-57, activity, normalized; Cobalt-57, activity, normalized, standard deviation; Cobalt-57, concentration factors; Containers and aquaria (20-1000 L or 〈 1 m**2); Crassostrea gigas; Date; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Identification; Laboratory experiment; Manganese-54, activity; Manganese-54, activity, normalized; Manganese-54, activity, normalized, standard deviation; Manganese-54, concentration factors; Mollusca; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Other metabolic rates; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Position; Potentiometric; Registration number of species; Replicate; Salinity; Sampling date; Silver-110m, activity; Silver-110m, activity, normalized; Silver-110m, activity, normalized, standard deviation; Silver-110m, concentration factors; Single species; Species; Temperate; Temperature; Temperature, water; Temperature, water, standard deviation; Time in days; Treatment; Type; Uniform resource locator/link to reference; Wet mass; Zinc-65, activity; Zinc-65, activity, normalized; Zinc-65, activity, normalized, standard deviation; Zinc-65, concentration factors
Type:
Dataset
Format:
text/tab-separated-values, 81131 data points
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