Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
Filter Total Items: 4094
Physiological condition of juvenile wading birds in relation to multiple landscape stressors in the Florida Everglades: effects of hydrology, prey availability, and mercury bioaccumulation
The physiological condition of juvenile birds can be influenced by multiple ecological stressors, and few studies have concurrently considered the effects of environmental contaminants in combination with ecological attributes that can influence foraging conditions and prey availability. Using three temporally distinct indices of physiological condition, we compared the physiological response of n
Authors
Garth Herring, Collin A. Eagles-Smith, Dale E. Gawlik, James M. Beerens, Joshua T. Ackerman
Inorganic elements in green sea turtles (Chelonia mydas): relationships among external and internal tissues
Inorganic elements from anthropogenic sources have entered marine environments worldwide and are detectable in marine organisms, including sea turtles. Threatened and endangered classifications of sea turtles have heretofore made assessments of contaminant concentrations difficult because of regulatory restrictions on obtaining samples using nonlethal techniques. In the present study, claw and ski
Authors
Derek R. Faust, Michael J. Hooper, George P. Cobb, Melanie Barnes, Donna Shaver, Shauna Ertolacci, Philip N. Smith
In situ and laboratory toxicity of coalbed natural gas produced waters with elevated sodium bicarbonate
Some tributaries in the Powder River Structural Basin, USA, were historically ephemeral, but now contain water year round as a result of discharge of coalbed natural gas (CBNG)-produced waters. This presented the opportunity to study field sites with 100% effluent water with elevated concentrations of sodium bicarbonate. In situ experiments, static renewal experiments performed simultaneously with
Authors
Aïda M. Farag, David D. Harper, Don Skaar
Educational webtool illustrating groundwater age effects on contaminant trends in wells
No abstract available.
Authors
John Karl Böhlke, Bryant C. Jurgens, David J. Uselmann, Sandra M. Eberts
Modeling long-term trends of chlorinated ethene contamination at a public supply well
A mass-balance solute-transport modeling approach was used to investigate the effects of dense nonaqueous phase liquid (DNAPL) volume, composition, and generation of daughter products on simulated and measured long-term trends of chlorinated ethene (CE) concentrations at a public supply well. The model was built by telescoping a calibrated regional three-dimensional MODFLOW model to the capture zo
Authors
Francis H. Chapelle, Leon J. Kauffman, Mark A. Widdowson
Utilizing hunter harvest effort to survey for wildlife disease: a case study of West Nile virus in greater sage-grouse
Greater sage-grouse (Centrocercus urophasianus; sage-grouse) are highly susceptible to infection with West Nile virus (WNV), with substantial mortality reported in wild populations and in experimentally infected birds. Although sage-grouse are hunted throughout much of their range, they have also recently been considered for protection under the Endangered Species Act. We used blood samples collec
Authors
Robert J. Dusek, Christian A. Hagen, J. Christian Franson, David A. Budeau, Erik K. Hofmeister
Causes of mortality in eagles submitted to the National Wildlife Health Center 1975-2013
We summarized the cause of death for 2,980 bald eagles (Haliaeetus leucocephalus) and 1,427 golden eagles (Aquila chrysaetos) submitted to the National Wildlife Health Center in Madison, Wisconsin, USA, for diagnosis between 1975 and the beginning of 2013. We compared the proportion of eagles with a primary diagnosis as electrocuted, emaciated, traumatized, shot or trapped, diseased, poisoned, oth
Authors
Robin E. Russell, J. Christian Franson
Anthrax and the geochemistry of soils in the contiguous United States
Soil geochemical data from sample sites in counties that reported occurrences of anthrax in wildlife and livestock since 2000 were evaluated against counties within the same states (MN, MT, ND, NV, OR, SD and TX) that did not report occurrences. These data identified the elements, calcium (Ca), manganese (Mn), phosphorus (P) and strontium (Sr), as having statistically significant differences in co
Authors
Dale W. Griffin, Erin E. Silvestri, Charlena Y. Bowling, Timothy Boe, David B. Smith, Tonya L. Nichols
Density-stratified flow events in Great Salt Lake, Utah, USA: implications for mercury and salinity cycling
Density stratification in saline and hypersaline water bodies from throughout the world can have large impacts on the internal cycling and loading of salinity, nutrients, and trace elements. High temporal resolution hydroacoustic and physical/chemical data were collected at two sites in Great Salt Lake (GSL), a saline lake in the western USA, to understand how density stratification may influence
Authors
David L. Naftz, Gregory T. Carling, Cory Angeroth, Michael Freeman, Ryan Rowland, Eddy Pazmiño
Comparison of surficial CO2 efflux to other measures of subsurface crude oil degradation
At a spill site near Bemidji, Minnesota, crude oil at the water table has been undergoing anaerobic biodegradation for over 30 years. Previous work at this site has shown that methane produced from biodegradation of the oil migrates upward and is oxidized in a methanotrophic zone midway between the water table and the surface. To compare microbial activity measurement methods from multiple locatio
Authors
Ean Warren, Natasha J. Sihota, Frances D. Hostettler, Barbara A. Bekins
Metamorphosis enhances the effects of metal exposure on the mayfly, Centroptilum triangulifer
The response of larval aquatic insects to stressors such as metals is used to assess the ecological condition of streams worldwide. However, nearly all larval insects metamorphose from aquatic larvae to winged adults, and recent surveys indicate that adults may be a more sensitive indicator of stream metal toxicity than larvae. One hypothesis to explain this pattern is that insects exposed to elev
Authors
Jeff S. Wesner, Johanna M. Kraus, Travis S. Schmidt, David M. Walters, William H. Clements
A mass balance approach to investigating geochemical controls on secondary water quality impacts at a crude oil spill site near Bemidji, MN
Secondary water quality impacts can result from a broad range of coupled reactions triggered by primary groundwater contaminants. Data from a crude-oil spill research site near Bemidji, MN provide an ideal test case for investigating the complex interactions controlling secondary impacts, including depleted dissolved oxygen and elevated organic carbon, inorganic carbon, CH4, Mn, Fe, and other diss
Authors
Gene-Hua Crystal Ng, Barbara A. Bekins, Isabelle M. Cozzarelli, Mary Jo Baedecker, Philip C. Bennett, Richard T. Amos