Mercury and methylmercury bioaccumulation in a contaminated bay

The bioaccumulation and the main source of total Hg (THg) and methylmercury (MMHg) in the deposit-feeding polychaete Neanthes japonica collected in Jinzhou Bay, China, were investigated. Compared with the historical data, THg bioaccumulation in polychaetes collected in sediment of Jinzhou Bay was di...

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Bibliographic Details
Published in:Marine pollution bulletin 2019-06, Vol.143, p.134-139
Main Authors: Xu, Zhizhen, Fan, Wenhong, Shi, Zhiwei, Tan, Cheng, Cui, Minming, Tang, Shichuan, Qiu, Guangle, Feng, Xinbin
Format: Article
Language:English
Subjects:
Accumulation
Animals
Bays
Bioaccumulation
Biological activity
China
Dimethylmercury
Environmental Monitoring
Geologic Sediments - analysis
History
In vivo
Ingestion
Mercury
Mercury (metal)
Mercury - analysis
Mercury - pharmacokinetics
Methyl mercury
Methylation
Methylmercury
Methylmercury Compounds - analysis
Methylmercury Compounds - pharmacokinetics
Microbial activity
Microorganisms
Oxidation
Oxidation-reduction potential
Polychaeta
Polychaeta - drug effects
Polychaeta - metabolism
Sediment
Sediments
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - pharmacokinetics
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Summary:The bioaccumulation and the main source of total Hg (THg) and methylmercury (MMHg) in the deposit-feeding polychaete Neanthes japonica collected in Jinzhou Bay, China, were investigated. Compared with the historical data, THg bioaccumulation in polychaetes collected in sediment of Jinzhou Bay was distinctly higher due to higher sediment THg concentration, but MMHg bioaccumulation was significantly lower. THg accumulation in polychaetes mainly derived from its accumulation in sediment. However, MMHg bioaccumulation in polychaetes did not correlate with Hg concentration in sediment. Besides sediment ingestion, MMHg accumulation in polychaetes may partially source from the process of in vivo transformation. The in vivo Hg methylation may take place in polychaetes, according to the excellent correlation between MMHg concentration and THg and inorganic Hg concentration in polychaetes. The biochemical characters in polychaete body, the oxidation-reduction environment and the microbial activity in polychaete gut may be beneficial to in vivo Hg methylation. [Display omitted] •A field study on THg and MMHg bioaccumulation in deposit-feeding polychaetes was conducted.•The production of MMHg in the body of benthic invertebrates was firstly put forward.•THg bioaccumulation mainly derived from its accumulation in sediment.•MMHg accumulation in polychaetes may partially source from the in vivo transformation.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2019.04.032