Dimethylmercury as a Source of Monomethylmercury in a Highly Productive Upwelling System.

ABSTRACT: Monomethylmercury (MMHg) is a neurotoxicant that biomagnifies in marine food webs, reaching high concentrations in apex predators. To predict changes in oceanic MMHg concentrations, it is important to quantify the sources and sinks of MMHg. Here, we study mercury speciation in the California Current System through cruise sampling and modeling. Previous work in the California Current System has found that upwelling transports mercury-enriched deep waters to productive surface waters. These upwelled waters originate within the California Undercurrent water mass and are subsequently advected as a surface water parcel to the California Current. Between the two major water masses, we find that compared to the California Current, the California Undercurrent contains elevated dissolved total merc

SUBMITTER: Adams HM 

PROVIDER: S-EPMC11406529 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature