| zinc and lead poisoning in wild birds in the tri-state mining district (oklahoma, kansas, and missouri). | the tri-state mining district (oklahoma, kansas, and missouri) is contaminated with pb, cd, and zn from mining, milling and smelting. metals have been dispersed heterogeneously throughout the district in the form of milled mine waste ("chat"), as flotation tailings and from smelters as aerial deposition or slag. this study was conducted to determine if the habitat has been contaminated to the extent that the assessment populations of wild birds are exposed to toxic concentrations of metals. amer ... | 2005 | 15657812 |
| toxic exposure of songbirds to lead in the southeast missouri lead mining district. | mining and smelting in the southeast missouri lead mining district has caused widespread contamination of soils with lead (pb) and other metals. soils from three study sites sampled in the district contained from approximately 1,000-3,200 mg pb/kg. analyses of earthworms [33-4,600 mg pb/kg dry weight (dw)] collected in the district showed likely high pb exposure of songbirds preying on soil organisms. mean tissue pb concentrations in songbirds collected from the contaminated sites were greater ( ... | 2013 | 23771631 |