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Fish carcasses deliver toxic mercury pollution to the deepest ocean trenches（图）
Fish carcasses deliver toxic mercury pollution deepest ocean trenches
2020/12/11
The sinking carcasses of fish from near-surface waters deliver toxic mercury pollution to the most remote and inaccessible parts of the world's oceans, including the deepest spot of them all: the 36,0...
Add another item to the ever-growing list of the dangerous impacts of climate change: Warming oceans are leading to an increase of the harmful neurotoxicant methylmercury in popular seafood, including...
The toxic metal mercury is present only at trace levels in the ocean, but it accumulates in fish at concentrations high enough to pose a threat to human and environmental health. Human activity has dr...
Methyl mercury dynamics in a tidal wetland quantified using in situ optical measurements
Methyl mercury dynamics a tidal wetland quantified in situ optical measurements
2014/4/8
We assessed monomethylmercury (MeHg) dynamics in a tidal wetland over three seasons using a novel method that employs a combination of in situ optical measurements as concentration proxies. MeHg conce...
Mercury dynamics and transport in two Adirondack lakes
Mercury dynamics transport two Adirondack lakes
2014/4/17
We investigated the chemistry and fluxes of mercury (Hg) species for two Adirondack lakes with contrasting landscape, physical, and chemical attributes. Samples were collected monthly at the lake inle...
Mercury and methylmercury cycling in sediments of the mid-Atlantic continental shelf and slope
Mercury methylmercury cycling slope
2014/4/17
We present a detailed study of the biogeochemical factors controlling mercury (Hg) distribution,
methylmercury (MeHg) production, and MeHg efflux in sediments of the mid-Atlantic continental shelf an...
Role of phytoplankton in mercury cycling in the San Francisco Bay estuary
Role of phytoplankton he San Francisco Bay estuary
2014/4/17
To study the role of phytoplankton in mercury cycling, we measured methylmercury (MeHg) and total
mercury (HgT) in surface waters during the spring 2003 phytoplankton bloom in San Francisco Bay. Cond...
Chemical and physical speciation of mercury in Offatts Bayou: A seasonally anoxic bayou in Galveston Bay
Chemical physical Offatts Bayou A seasonally anoxic bayou in Galveston Bay
2014/4/22
A chemical equilibrium model was used to predict the solution speciation of dissolved mercury (Hg) in the stratified water column of Offatts Bayou, a subestuary in Galveston Bay, Texas, which undergoe...
History of mercury inputs to Minnesota lakes: Influences of watershed disturbance and localized atmospheric deposition
mercury inputs Minnesota lakes:watershed disturbance localized atmospheric deposition
2014/4/21
The history of mercury (Hg) inputs to 55 Minnesota (U.S.A.) lakes was reconstructed from 210Pb (lead-210)- dated sediment cores to determine if erosion of soils from agriculture and urbanization contr...
Long-term changes in legacy trace organic contaminants and mercury in Lake Ontario salmon in relation to source controls, trophodynamics, and climatic variability
legacy trace organic contaminants mercury
2014/5/5
We used long-term (20+ yr) datasets to determine how the sum of 209 polychlorinated biphenyl congeners
([SPCB]), dodecachloropentacyclodecane ([mirex]), para-para dichlorodiphenyltrichloroethane ([ p...
Thiols in wetland interstitial waters and their role in mercury and methylmercury speciation
wetland interstitial waters their role in mercury methylmercury speciation
2014/5/19
Organic sulfhydryl compounds, or thiols, are ligands that strongly complex class B metals such as Hg and methylmercury (MeHg). We determined the concentration profiles of five low-molecular-weight thi...
Biological and photochemical production of dissolved gaseous mercury in a boreal lake
Biological and photochemical production dissolved gaseous mercury boreal lake
2014/5/19
We used in situ experiments and measured depth profiles of dissolved gaseous mercury (DGM) to investigate the relative contribution of photochemical versus biological processes on the production of DG...
Sediment–water exchange of total mercury and monomethyl mercury in the San Francisco Bay–Delta
Sediment–water exchange monomethyl mercury
2014/5/19
Five field trips were conducted in the San Francisco Bay–Delta between May 2000 and October 2001 to investigate the sediment–water exchange of total mercury (Hg) and monomethyl mercury (MMHg). S...
Salmon-derived mercury and nutrients in a Lake Ontario spawning stream
Salmon-derived mercury nutrients Lake Ontario spawning stream
2014/5/19
We tested the hypothesis that concentrations of mercury species (Hg) and nutrients (NH4+, NO3-, P, and dissolved organic carbon) in abiotic and biotic components would be altered by the decomposition ...
A comparison of the speciation and fate of mercury in two contaminated coastal marine ecosystems: The Venice Lagoon (Italy) and Lavaca Bay (Texas)
speciation and fate mercury in two contaminated coastal marine ecosystems Venice Lagoon (Italy) Lavaca Bay (Texas)
2014/5/14
We compared the speciation of Hg in two estuaries, Lavaca Bay (Texas) and the Venice Lagoon (Italy). Both are large, shallow embayments that are contaminated by direct discharges from mercury-cell chl...