Ocean acidification increases cadmium accumulation in marine bivalves: a potential threat to seafood safety

Scientific Reports
Wei ShiGuangxu Liu

Abstract

To date, the effects of ocean acidification on toxic metals accumulation and the underlying molecular mechanism remains unknown in marine bivalve species. In the present study, the effects of the realistic future ocean pCO2 levels on the cadmium (Cd) accumulation in the gills, mantle and adductor muscles of three bivalve species, Mytilus edulis, Tegillarca granosa, and Meretrix meretrix, were investigated. The results obtained suggested that all species tested accumulated significantly higher Cd (p < 0.05) in the CO2 acidified seawater during the 30 days experiment and the health risk of Cd (based on the estimated target hazard quotients, THQ) via consumption of M. meretrix at pH 7.8 and 7.4 significantly increased 1.21 and 1.32 times respectively, suggesting a potential threat to seafood safety. The ocean acidification-induced increase in Cd accumulation may have occurred due to (i) the ocean acidification increased the concentration of Cd and the Cd(2+)/Ca(2+) in the seawater, which in turn increased the Cd influx through Ca channel; (ii) the acidified seawater may have brought about epithelia damage, resulting in easier Cd penetration; and (iii) ocean acidification hampered Cd exclusion.

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Citations

Feb 2, 2017·Marine Pollution Bulletin·Jeff C Clements, Heather L Hunt
Aug 14, 2019·Journal of Biophotonics·Rong ShenDegui Wang
Jan 30, 2020·Foods·Antía Martinez-AlboresAlberto Cepeda
Jul 1, 2020·International Journal of Environmental Research and Public Health·Laura J FalkenbergSam Dupont
Aug 7, 2018·Frontiers in Physiology·Danli SongYongbo Bao
Dec 2, 2020·The Science of the Total Environment·Emily RowlandsClara Manno
Aug 11, 2021·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Narayanan GopiBaskaralingam Vaseeharan
Jul 10, 2020·Environmental Science & Technology·Michael S BankPeter W Swarzenski

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Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

R
R Development Core Team

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