ArticleEnvironmental science & technology2026
Where Brimstone Meets Quicksilver: Interactions between Agricultural Sulfur Applications and Methylmercury Production along a Vineyard to Wetland Gradient.
Article in Environmental science & technology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Mercury (Hg), specifically as methyl Hg (MeHg), is a potent neurotoxin with significant consequences for humans and wildlife. This study examines the interactions between sulfur used as a fungicide in California, U.S., vineyards and Hg methylation. We collected surface soils and soil porewater across a vineyard to wetland gradient situated at the terminus of the Napa Valley winegrowing region for analyses of sulfate, total Hg, and MeHg. We found that sulfate runoff from vineyards is transported into adjacent wetlands via drainage ditches and a grassland transition zone. In addition, concentrations of MeHg and percent of Hg present as MeHg in the wetland and drainage ditch were approximately three to eight times higher than values measured in vineyard and grassland transition soils, while potential net Hg methylation rates (
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