Global trace metal cycles and predictions

The relative enrichment of selenium over sulfur is corroborated by direct measurements of methylated selenium and sulfur species in seawater and in a pristine wetland and by elemental analysis of aerosols.

“This relative enrichment of Se over S is corroborated by direct measurements of methylated Se and S species in seawater [91] and in a pristine wetland [94] by elemental analysis of aerosols [45,95].”

The biogenic production of volatile Se compounds and the corresponding Se emissions have been assessed in a variety of environmental compartments including soils and sediments, plant leaves, peat bogs, estuarine waters, lakes, and the marine environment.

“Although quantitative measurements are relatively scarce, the biogenic production of volatile Se compounds and the corresponding Se emissions have been assessed in a variety of environmental compartments including soils and sediments [37,262,263,264,265,266,267], plant leaves [268], peat bogs [95,261], estuarine waters [268], lakes [269] and in the marine environment [92,96].”