Trends in mercury concentrations and methylation in Minamata Bay, Japan, between 2014 and 2018

Akito Matsuyama, Shinichiro Yano, Yoko Taniguchi, Michiaki Kindaichi, Akihide Tada, Minoru Wada

Research output: Contribution to journalArticlepeer-review

Abstract

Methylmercury concentrations in Minamata Bay are high, but the cause is unclear. We conducted a basic study on the behavior of methylmercury in Minamata Bay seawater; the findings suggest that mercury methylation may occur throughout the year in Minamata Bay. Seawater temperature, salinity, and concentrations of dissolved organic carbon were the environmental factors that affected methylation, and the degree of methylation was closely related to bacterial community structure. The concentration of methylmercury in suspended particulate matter was highest 10 m below the surface and decreased with greater depths. We did not observe a correlation between methylmercury concentrations in suspended particulate matter and concentrations of dissolved methylmercury.

Original languageEnglish
Article number112886
JournalMarine Pollution Bulletin
Volume173
DOIs
Publication statusPublished - Dec 2021

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science
  • Pollution

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