title: Cadmium and associated metals in soils and sediments of wetlands across the Northern Plains, USA.
abstract: Cadmium, present locally in naturally high concentrations in the Northern Plains of the United States, is of concern because of its toxicity, carcinogenic properties, and potential for trophic transfer. Reports of natural concentrations in soils are dominated by dryland soils with agricultural land uses, but much less is known about cadmium in wetlands. Four wetland categories - prairie potholes, shallow lakes, riparian wetlands, and river sediments - were sampled comprising more than 300 wetlands across four states, the majority in North Dakota. Cd, Zn, P, and other elements were analyzed by ICP-MS, in addition to pH and organic matter (as loss-on-ignition). The overall cadmium content was similar to the general concentrations in the area's soils, but distinct patterns occurred within categories. Cd in wetland soils is associated with underlying geology and hydrology, but also strongly with concentrations of P and Zn, suggesting a link with agricultural land use surrounding the wetlands.
authors.affiliation: Wet Ecosystem Research Group, Department of Biological Sciences, NDSU Department 2715, P.O. Box 6050, Fargo, ND 58108-6050, USA. donna.jacob@ndsu.edu
authors.forename: Donna L
authors.initials: DL
authors.lastname: Jacob
authors.forename: Alex H
authors.initials: AH
authors.lastname: Yellick
authors.forename: La Toya T
authors.initials: LT
authors.lastname: Kissoon
authors.forename: Aida
authors.initials: A
authors.lastname: Asgary
authors.forename: Dimuthu N
authors.initials: DN
authors.lastname: Wijeyaratne
authors.forename: Bernhardt
authors.initials: B
authors.lastname: Saini-Eidukat
authors.forename: Marinus L
authors.initials: ML
authors.lastname: Otte
mesh_terms: D002104:Cadmium / Q000032:analysis*; D004784:Environmental Monitoring; D004787:Environmental Pollution / Q000706:statistics & numerical data; D019015:Geologic Sediments / Q000737:chemistry*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D014481:United States; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D002104:Cadmium