“…Although of natural geochemical occurrence, these trace elements are progressively concentrated because of high evaporative water losses, first from agricultural soils, then from evaporation ponds or wetlands into which drainage water is discharged. Included are trace elements such as AsO 4 , MoO 4 , SeO 4 , and HVO 4 , which normally exist as oxyanions in oxic waters and may pose food‐chain transfer hazards to wildlife, livestock, or humans [10,11]. As part of a larger study of vegetation management options for dewatered and exposed sediments at Kesterson National Wildlife Refuge and other sites in California [11], we have been examining how soil solution composition affects plant uptake of trace elements, particularly Se [12,13].…”