Journal
ENVIRONMENTAL POLLUTION
Volume 259, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2019.113821
Keywords
Ocean warming; Thermal pollution; Metal oral bioavailability; Metal accumulation; Oysters; Food safety
Categories
Funding
- National Natural Science Foundation of China [41976150]
- Natural Science Foundation of Fujian [2019J01747]
- Natural Science Foundation of Zhangzhou [ZZ2018J16]
- Education-Science Research Project for Young and Middle-aged Teachers of Fujian [JAT170341]
- Training Program of Fujian Excellent Talents in University (FETU)
- Program for Innovation and Entrepreneurship [201810402068]
- Program for New Doctor in Minnan Normal University
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Human-induced temperature changes influence coastal regions, both via thermal pollution and ocean warming, which exerts profound effects on the chemistry of metals and the physiology of organisms. However, it remains unknown whether the increased temperature of discharged water or ocean warming, as a result of climate change, lead to an increase of human health risks associated with the consumption of sea foods. In this study, the influence of temperature on metal accumulation by oysters was studied in individuals collected from a coastal area affected by the thermal water discharge of the Houshi Power Plant, China. The bioaccumulation factor (BAF) and oral bioavailability (OBA) of metals in oysters was determined. Elevated temperatures led to an increase in BAF for Cu, Zn, Hg, and Cd (p < 0.05), but no change was observed for As and Pb (p > 0.05). The OBA for Cd, As, and Pb correlated positively to elevated temperatures (p < 0.05). However, for Cu and Zn, OBA was negatively correlated with increasing temperature (p < 0.05). As, Pb, and Cd in the trophically available metal (defined as a sum of heat-stable proteins, heat-denaturable proteins, and organelles) was significantly elevated at the highest temperature seawater site (site A) compared to the lowest seawater site (site B). Thus, the irregular variation of OBA for each metal may be the result of variations in the subcellular distribution of metals and the protein quality influenced by the increased temperature. Moreover, the increased temperature and increased the hazard quotient values of As and Cd (p < 0.05 for As, n = 6, p < 0.05 for Cd, n = 6), which provided an indication of the potential risks of the consumption of oysters or other seafood to future warming under climate change scenarios. (C) 2019 Published by Elsevier Ltd.
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