David P Krabbenhoft
David Krabbenhoft is a Scientist Emeritus with the Upper Midwest Water Science Center.
David Krabbenhoft received his Ph.D. from the University of Wisconsin-Madison in 1988 and has been a research scientist with the U.S. Geological Survey since. He has general research interests are in biogeochemistry and hydrogeology of aquatic ecosystems. Dave began working on environmental mercury cycling, transformations, and fluxes in aquatic ecosystems with the Mercury in Temperate Lakes project in 1988; since then, the topic has consumed his professional life. In 1994, Dave established the USGS’s Mercury Research Laboratory, which includes a team of multi-disciplinary mercury investigators and a state-of-the-art analytical facility strictly dedicated to low-level speciation analysis of mercury. In 1995 he initiated the multi-agency Aquatic Cycling of Mercury in the Everglades (ACME) project, which is still ongoing. More recently, Dave has been a Primary Investigator on the internationally conducted Mercury Experiment To Assess Atmospheric Loadings in Canada and the US (METAALICUS) project, which is a novel effort to examine the ecosystem-level response to loading an entire watershed with mercury. Currently, Dave’s research team is active on projects that span environments as far ranging as the Pacific Ocean to freshwater systems in Alaska to Florida, and from California to New England. In recent years, the Mercury Research Team entered into the realm of atmospheric research by constructing and deployed the USGS Mobile Atmospheric Mercury Lab, which has the capability for rapid deployment and advanced study of mercury in the atmosphere. Since 1990, he has authored or coauthored over 100 papers on mercury in the environment. In August 2006, Dave served as the Co-Chair for the 8th International Conference on Mercury as a Global Pollutant.
Professional Experience
Research Hydrologist/Geochemist, U.S. Geological Survey, Wisconsin Water Science Center, 8505 Research Way, Middleton, Wisconsin, July 1988 to present.
Adjunct, University of Wisconsin-Madison, 2001 to present.
USGS Mercury Research Lab, Team Leader, 1994 to present.
Education and Certifications
Ph.D. 1988, University of Wisconsin-Madsion, Department of Geology and Geophysics; research emphasis isotope geochemistry, limnology, and hydrogeology
M.S. 1984, University of Wisconsin-Madsion, Department of Geology and Geophysics; research emphasis geochemistry and hydrogeology
B.S. 1982, North Dakota St. University, Major: Geology, Minor: Chemistry
Honors and Awards
Shoemaker Lifetime Achievement Award for Excellence in Science Communications (October 2013)
USGS performance awards (received on 24 occasions from 1988-2013)
Department of the Interior, U.S. Geological Survey, In Recognition for Meritorious Service (2003)
Department of the Interior, U.S. Geological Survey, In Recognition for Superior Service (1997)
Exxon Research Scholarship, University of Wisconsin-Madison (1982)
Summa Cum Laude, North Dakota State University (19
Science and Products
Atmospheric mercury and fine particulate matter in coastal New England: implications for mercury and trace element sources in the northeastern United States
U.S. Geological Survey environmental health science strategy — Providing environmental health science for a changing world
Trophic transfer efficiency of methylmercury and inorganic mercury to lake trout Salvelinus namaycush from its prey
USGS Environmental health science strategy: providing environmental health science for a changing world: Public review release
Mercury species and other selected constituent concentrations in water, sediment, and biota of Sinclair Inlet, Kitsap County, Washington, 2007-10
Litterfall mercury dry deposition in the eastern USA
Tidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary
Methylation of Hg downstream from the Bonanza Hg mine, Oregon
Source apportionment of atmospheric trace gases and particulate matter--Comparison of log-ratio and traditional approaches
Environmental conditions constrain the distribution and diversity of archaeal merA in Yellowstone National Park, Wyoming, U.S.A.
Dissolved organic matter in the Florida everglades: Implications for ecosystem restoration
Removal of inorganic mercury and methylmercury from surface waters following coagulation of dissolved organic matter with metal-based salts
Science and Products
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Atmospheric mercury and fine particulate matter in coastal New England: implications for mercury and trace element sources in the northeastern United States
Intensive sampling of ambient atmospheric fine particulate matter was conducted at Woods Hole, Massachusetts over a four-month period from 3 April to 29 July, 2008, in conjunction with year-long deployment of the USGS Mobile Mercury Lab. Results were obtained for trace elements in fine particulate matter concurrently with determination of ambient atmospheric mercury speciation and concentrations oAuthorsAllan Kolker, Mark A. Engle, Bernhard Peucker-Ehrenbrink, Nicholas J. Geboy, David P. Krabbenhotft, Michael H. Bothner, Michael T. TateU.S. Geological Survey environmental health science strategy — Providing environmental health science for a changing world
Executive SummaryAmerica has an abundance of natural resources. We have bountiful clean water, fertile soil, and unrivaled national parks, wildlife refuges, and public lands. These resources enrich our lives and preserve our health and wellbeing. These resources have been maintained because of our history of respect for their value and an enduring commitment to their vigilant protection. AwarenessAuthorsPatricia R. Bright, Herbert T. Buxton, Laurie S. Balistrieri, Larry B. Barber, Francis H. Chapelle, Paul C. Cross, David P. Krabbenhoft, Geoffrey S. Plumlee, Jonathan M. Sleeman, Donald E. Tillitt, Patricia L. Toccalino, James R. WintonTrophic transfer efficiency of methylmercury and inorganic mercury to lake trout Salvelinus namaycush from its prey
Based on a laboratory experiment, we estimated the net trophic transfer efficiency of methylmercury to lake trout Salvelinus namaycush from its prey to be equal to 76.6 %. Under the assumption that gross trophic transfer efficiency of methylmercury to lake trout from its prey was equal to 80 %, we estimated that the rate at which lake trout eliminated methylmercury was 0.000244 day−1. Our laboratoAuthorsC.P. Madenijian, S.R. David, D. P. KrabbenhoftUSGS Environmental health science strategy: providing environmental health science for a changing world: Public review release
America has an abundance of natural resources. We have bountiful clean water, fertile soil, and unrivaled national parks, wildlife refuges, and public lands. These resources enrich our lives and preserve our health and wellbeing. These resources have been maintained because of our history of respect for their value and an enduring commitment to their vigilant protection. Awareness of the social, eAuthorsPatricia R. Bright, Herbert T. Buxton, Laurie S. Balistrieri, Larry B. Barber, Francis H. Chapelle, Paul C. Cross, David P. Krabbenhoft, Geoffrey S. Plumlee, Jonathan M. Sleeman, Donald E. Tillitt, Patricia L. Toccalino, James R. WintonMercury species and other selected constituent concentrations in water, sediment, and biota of Sinclair Inlet, Kitsap County, Washington, 2007-10
This report presents data collected for two U.S. Geological Survey field sampling projects related to mercury (Hg) in Sinclair Inlet: (1) the Watersheds Sources Project that evaluated the sources of mercury to Sinclair Inlet during December 2007 to March 2010, and (2) the Methylation and Bioaccumulation Project, a comprehensive examination of mercury biogeochemistry in sediment, water, and zooplanAuthorsR.L. Huffman, R. J. Wagner, J. Toft, J. Cordell, J.F. DeWild, R.S. Dinicola, G. R. Aiken, D. P. Krabbenhoft, M. Marvin-DiPasquale, A.R. Stewart, P.W. Moran, A.J. PaulsonLitterfall mercury dry deposition in the eastern USA
Mercury (Hg) in autumn litterfall from predominately deciduous forests was measured in 3 years of samples from 23 Mercury Deposition Network sites in 15 states across the eastern USA. Annual litterfall Hg dry deposition was significantly higher (median 12.3 micrograms per square meter (μg/m2), range 3.5–23.4 μg/m2) than annual Hg wet deposition (median 9.6 μg/m2, range 4.4–19.7 μg/m2). The mean raAuthorsMartin R. Risch, John F. DeWild, David P. Krabbenhoft, Randall K. Kolka, Leiming ZhangTidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary
The flux of dissolved organic carbon (DOC) from mangrove swamps accounts for 10% of the global terrestrial flux of DOC to coastal oceans. Recent findings of high concentrations of mercury (Hg) and methylmercury (MeHg) in mangroves, in conjunction with the common co-occurrence of DOC and Hg species, have raised concerns that mercury fluxes may also be large. We used a novel approach to estimate expAuthorsBrian A. Bergamaschi, D. P. Krabbenhoft, George Aiken, Eduardo Patino, D.G. Rumbold, William H. OremMethylation of Hg downstream from the Bonanza Hg mine, Oregon
Speciation of Hg and conversion to methyl-Hg were evaluated in stream sediment, stream water, and aquatic snails collected downstream from the Bonanza Hg mine, Oregon. Total production from the Bonanza mine was >1360t of Hg, during mining from the late 1800s to 1960, ranking it as an intermediate sized Hg mine on an international scale. The primary objective of this study was to evaluate the distrAuthorsJohn E. Gray, Mark E. Hines, David P. Krabbenhoft, Bryn ThomsSource apportionment of atmospheric trace gases and particulate matter--Comparison of log-ratio and traditional approaches
No abstract available.AuthorsMark A. Engle, Bernhard Peucker-Ehrenbrink, Josep M. Martín-Fernández, David P. Krabbenhoft, Paul J. Lamothe, Michael H. Bothner, Ricardo A. Olea, Allan Kolker, Michael T. TateByEcosystems Mission Area, Water Resources Mission Area, Energy Resources Program, Environmental Health Program, Toxic Substances Hydrology, Geology, Energy & Minerals Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Woods Hole Coastal and Marine Science Center, Mercury Research LaboratoryEnvironmental conditions constrain the distribution and diversity of archaeal merA in Yellowstone National Park, Wyoming, U.S.A.
The distribution and phylogeny of extant protein-encoding genes recovered from geochemically diverse environments can provide insight into the physical and chemical parameters that led to the origin and which constrained the evolution of a functional process. Mercuric reductase (MerA) plays an integral role in mercury (Hg) biogeochemistry by catalyzing the transformation of Hg(II) to Hg(0). PutatiAuthorsY. Wang, E. Boyd, S. Crane, P. Lu-Irving, David P. Krabbenhoft, S. King, J. Dighton, G. Geesey, T. BarkayDissolved organic matter in the Florida everglades: Implications for ecosystem restoration
Dissolved organic matter (DOM) in the Florida Everglades controls a number of environmental processes important for ecosystem function including the absorption of light, mineral dissolution/precipitation, transport of hydrophobic compounds (e.g., pesticides), and the transport and reactivity of metals, such as mercury. Proposed attempts to return the Everglades to more natural flow conditions willAuthorsG. R. Aiken, C.C. Gilmour, D. P. Krabbenhoft, W. OremRemoval of inorganic mercury and methylmercury from surface waters following coagulation of dissolved organic matter with metal-based salts
The presence of inorganic mercury (IHg) and methylmercury (MeHg) in surface waters is a health concern worldwide. This study assessed the removal potential use of metal-based coagulants as a means to remove both dissolved IHg and MeHg from natural waters and provides information regarding the importance of Hg associations with the dissolved organic matter (DOM) fraction and metal hydroxides. PreviAuthorsY.K. Henneberry, T.E.C. Kraus, J.A. Fleck, David P. Krabbenhoft, P.M. Bachand, W.R. Horwath - Web Tools
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