Publications
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Filter Total Items: 205
Influence of plankton mercury dynamics and trophic pathways on mercury concentrations of top predator fish of a mining-impacted reservoir Influence of plankton mercury dynamics and trophic pathways on mercury concentrations of top predator fish of a mining-impacted reservoir
Physical and biogeochemical characteristics of the aquatic environment that affect growth dynamics of phytoplankton and the zooplankton communities that depend on them may also affect uptake of methylmercury (MeHg) into the pelagic food web of oligotrophic reservoirs. We evaluated changes in the quality and quantity of suspended particulate material, zooplankton taxonomy, and MeHg...
Authors
A.R. Stewart, M. K. Saiki, J.S. Kuwabara, Charles N. Alpers, M. Marvin-DiPasquale, D. P. Krabbenhoft
Influence of natural dissolved organic carbon on the bioavailability of mercury to a freshwater alga Influence of natural dissolved organic carbon on the bioavailability of mercury to a freshwater alga
Bioavailability of mercury (Hg) to Selenastrum capricornutum was assessed in bioassays containing field-collected freshwater of varying dissolved organic carbon (DOC) concentrations. Bioconcentration factor (BCF) was measured using stable isotopes of methylmercury (MeHg) and inorganic Hg(II). BCFs for MeHg in low-DOC lake water were significantly larger than those in mixtures of lake...
Authors
P.R. Gorski, D.E. Armstrong, J.P. Hurley, D. P. Krabbenhoft
Characterization and cycling of atmospheric mercury along the central US Gulf Coast Characterization and cycling of atmospheric mercury along the central US Gulf Coast
Concentrations of atmospheric Hg species, elemental Hg (Hg∘), reactive gaseous Hg (RGM), and fine particulate Hg (Hg-PM2.5) were measured at a coastal site near Weeks Bay, Alabama from April to August, 2005 and January to May, 2006. Mean concentrations of the species were 1.6 ± 0.3 ng m−3, 4.0 ± 7.5 pg m−3 and 2.7 ± 3.4 pg m−3, respectively. A strong diel pattern was observed for RGM...
Authors
M.A. Engle, M.T. Tate, D. P. Krabbenhoft, A. Kolker, M.L. Olson, E.S. Edgerton, J.F. DeWild, A.K. McPherson
Water-quality characteristics for selected sites within the Milwaukee Metropolitan Sewerage District planning area, Wisconsin, February 2004-September 2005 Water-quality characteristics for selected sites within the Milwaukee Metropolitan Sewerage District planning area, Wisconsin, February 2004-September 2005
The Milwaukee Metropolitan Sewerage District (MMSD) Corridor Study is a three-phase project designed to improve the understanding of water resources in the MMSD planning area to assist managers and policy makers in their decisions. Phase I of the Study involved the compilation of existing data from multiple agencies into a single database. These data were analyzed to identify spatial...
Authors
Judith C. Thomas, Michelle A. Lutz, Jennifer L. Bruce, David J. Graczyk, Kevin D. Richards, David P. Krabbenhoft, Stephen M. Westenbroek, Barbara C. Scudder, Daniel J. Sullivan, Amanda H. Bell
Mercury and methylmercury in water and bottom sediments of wetlands at Lostwood National Wildlife Refuge, North Dakota, 2003-04 Mercury and methylmercury in water and bottom sediments of wetlands at Lostwood National Wildlife Refuge, North Dakota, 2003-04
Certain ecosystem types, particularly wetlands, have environmental characteristics that can make them particularly sensitive to mercury inputs and that can result in large mercury concentrations in fish or other aquatic biota. To provide information needed to make effective management decisions to decrease human and wildlife exposure to methylmercury in northern prairie pothole wetlands...
Authors
Steven K. Sando, D. P. Krabbenhoft, Kevin M. Johnson, Robert F. Lundgren, Douglas G. Emerson
Introduction and background Introduction and background
No abstract available.
Authors
R. Harris, David P. Krabbenhoft, M. Murray, R.J. Reash, T. Saltman, R. Murray
Monitoring and evaluating trends in sediment and water indicators Monitoring and evaluating trends in sediment and water indicators
No abstract available.
Authors
David P. Krabbenhoft, D.R. Engstrom, C. Gilmour, R. Harris, J.P. Hurley, R.P. Mason
Development of a mercury speciation, fate, and biotic uptake (BIOTRANSPEC) model: Application to Lahontan Reservoir (Nevada, USA) Development of a mercury speciation, fate, and biotic uptake (BIOTRANSPEC) model: Application to Lahontan Reservoir (Nevada, USA)
A mathematically linked mercury transport, speciation, kinetic, and simple biotic uptake (BIOTRANSPEC) model has been developed. An extension of the metal transport and speciation (TRANSPEC) model, BIOTRANSPEC estimates the fate and biotic uptake of inorganic (Hg(II)), elemental (Hg(0)) and organic (MeHg) forms of mercury and their species in the dissolved, colloidal (e.g., dissolved...
Authors
N. Gandhi, S.P. Bhavsar, M.L. Diamond, James S. Kuwabara, Mark C. Marvin-DePasquale, David P. Krabbenhoft
Preface to the Madison declaration and critical synthesis papers on mercury pollution Preface to the Madison declaration and critical synthesis papers on mercury pollution
No abstract available.
Authors
James P. Hurley, David P. Krabbenhoft, James G. Wiener, Christopher L. Babiarz
Sources of speciated atmospheric mercury at a residential neighborhood impacted by industrial sources Sources of speciated atmospheric mercury at a residential neighborhood impacted by industrial sources
Speciated measurements of atmospheric mercury plumes were obtained at an industrially impacted residential area of East St. Louis, IL. These plumes were found to result in extremely high mercury concentrations at ground level that were composed of a wide distribution of mercury species. Ground level concentrations as high as 235 ng m-3 for elemental mercury (Hg 0) and 38 300 pg m-3 for...
Authors
H. Manolopoulos, D.C. Snyder, James J Schauer, J.S. Hill, J.R. Turner, Mark L. Olson, David P. Krabbenhoft
Whole-ecosystem study shows rapid fish-mercury response to changes in mercury deposition Whole-ecosystem study shows rapid fish-mercury response to changes in mercury deposition
Methylmercury contamination of fisheries from centuries of industrial atmospheric emissions negatively impacts humans and wild-life worldwide. The response of fish methylmercury concentrations to changes in mercury deposition has been difficult to establish because sediments/soils contain large pools of historical contamination, and many factors in addition to deposition affect fish...
Authors
R.C. Harris, J.W.M. Rudd, M. Amyot, Christopher L. Babiarz, K.G. Beaty, P.J. Blanchfield, R.A. Bodaly, B.A. Branfireun, C.C. Gilmour, J.A. Graydon, A. Heyes, H. Hintelmann, J.P. Hurley, C.A. Kelly, David P. Krabbenhoft, S.E. Lindberg, R.P. Mason, M.J. Paterson, C.L. Podemski, A. Robinson, K.A. Sandilands, G.R. Southworthn, Louis, Michael T. Tate
Local and regional factors affecting atmospheric mercury speciation at a remote location Local and regional factors affecting atmospheric mercury speciation at a remote location
Atmospheric concentrations of elemental (Hg0), reactive gaseous (RGM), and particulate (PHg) mercury were measured at two remote sites in the midwestern United States. Concurrent measurements of Hg0, PHg, and RGM obtained at Devil's Lake and Mt. Horeb, located approximately 65 km apart, showed that Hg0 and PHg concentrations were affected by regional, as well as local sources, while RGM...
Authors
H. Manolopoulos, J.J. Schauer, M.D. Purcell, T.M. Rudolph, Mark L. Olson, B. Rodger, David P. Krabbenhoft