期刊
ENVIRONMENTAL POLLUTION
卷 178, 期 -, 页码 211-219出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.03.005
关键词
Prairie potholes; Riparian; Floodplains; Shallow lakes; Zinc
资金
- National Institute of General Medical Sciences of the National Institutes of Health [P20GM12345 (ND INBRE)]
- US Environmental Protection Agency (EPA/ND Department of Health Wetland Program Development Grant, National Center for Research Resources [5P20RR016471-1]
- ND Agricultural Experiment Station/NDSU College of Science and Mathematics Small Grant Program
- Upper Midwest Aerospace Consortium/NASA [NNX10AH20G, 1177-16116]
- MN Department of Natural Resources (The Legislative-Citizen Commission on Minnesota Resources)
- Red Lake Nation Department of Natural Resources (EPA Wetland Program Development Grant)
- ND ESPCoR/NSF [EPS-0814442]
- Wetland Foundation
- Sigma Xi
- ND Water Resources Research Institute
- ND Department of Health
- ND INBRE
- Office Of The Director
- EPSCoR [0814442] Funding Source: National Science Foundation
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. (C) 2013 Elsevier Ltd. All rights reserved.
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