Trophic transfer and dietary exposure risk of mercury in aquatic organisms from urbanized coastal ecosystems
| Autor: | Lulu Mao, Wei Ouyang, Bo-Tao Zhang, Ming Xin, Chunye Lin, Tingting Wu, Zongxing Wang, Mengchang He, Baodong Wang, Xitao Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Aquatic Organisms
Environmental Engineering Food Chain Health Toxicology and Mutagenesis Biomagnification 0208 environmental biotechnology Population chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Dietary Exposure chemistry.chemical_compound Food chain Environmental Chemistry Animals Humans education Methylmercury Ecosystem 0105 earth and related environmental sciences Trophic level education.field_of_study Public Health Environmental and Occupational Health Fishes General Medicine General Chemistry Mercury Methylmercury Compounds Pollution Hazard quotient 020801 environmental engineering Mercury (element) chemistry Bioaccumulation Environmental chemistry Environmental science Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Chemosphere. 281 |
| ISSN: | 1879-1298 |
| Popis: | In this study, 26 surface seawater samples, 26 surface sediment samples and 114 organisms were collected to study the trophic transfer and dietary exposure risk of mercury (Hg) in organisms from the Jiaozhou Bay, which is a typical semi-enclosed urbanized bay. The total mercury (THg) and methylmercury (MeHg) concentrations did not exceed the threshold limits and performed as: fish > crustaceans > mollusks. The trophic level values (TLs) were less than 3 in all the groups, indicating simple structure of food chain. With the increasing δ15N value, THg and MeHg were significantly biomagnified in the mollusks and fish but not in the crustaceans. In addition, the bioaccumulation and biomagnification of MeHg were higher than inorganic mercury (IHg) in the aquatic food chain. Target hazard quotient (THQ) and provisional tolerable weekly intake (PTWI) indicated that Hg exposure via consumption of seafood from the Jiaozhou Bay did not pose significant health risks for general population. Consuming fish will face the higher health risk than crustaceans and mollusks, especially in urban regions. Moreover, the risk of MeHg caused by intaking seafood deserved more attention. Trophic transfer function (TTF) explicated the transfer of Hg in the ecosystem and higher trophic transfer efficiency of MeHg than IHg. TTF interpreted the terrestrial input of Hg should be controlled to ensure the safety of consuming seafood from the Jiaozhou Bay. |
| Databáze: | OpenAIRE |
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