JoAnn Holloway
JoAnn Holloway is a Research Physical Scientist (biogeochemistry) with the Geology, Geophysics, and Geochemistry Science Center.
Soil is the basis for terrestrial ecosystems, influencing vegetation patterns and water quality. JoAnn Holloway is a biogeochemist with research interests exploring the influence of parent material, geomorphology and hydrologic processes on soil biogeochemistry. These processes are evaluated in the context of how land use, including historic mining, urbanization, forestry and agricultural practices can influence soil and water quality. Her background in hydrology, geology, geochemistry, pedology and soil microbiology provides the basis for interdiscipline collaborations to evaluate the impact of land use and natural disasters (e.g., hurricane surge, wildfires) on soil and water quality.
Professional Experience
Research Geologist, 2005 - present
U.S. Geological Survey, Geology, Geophysics, and Geochemistry Science Center; Denver, COResearch Geologist (Mendenhall Postdoctoral Fellow) 2003-2005
U.S. Geological Survey, Crustal Imaging and Characterization Team; Denver, COLecturer, Spring Semester 2003
"Environmental Microbiology", Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, COResearch Hydrologist (National Research Council Postdoctoral Fellow) 1999-2001
U.S. Geological Survey, National Research Program; Boulder, CO
Education and Certifications
Ph.D. Hydrologic Sciences, University of California at Davis, 1999
Dissertation: Influence of Bedrock Weathering on Nitrogen Cycling in a Sierra Nevada Watershed
Advisor: Randy DahlgrenM.S. Geology, Western Washington University, 1993
Thesis: Geochemical Interactions in a Subalpine Watershed, Mount Baker National Recreation Area, WashingtonB.S. Geology, University of Utah, 1990
Senior Thesis: Mineralization and Geochemistry of the Escalante Silver Mine, Iron County, Utah
Science and Products
Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA
Shoreline surveys of oil-impacted marsh in southern Louisiana, July to August 2010
Carbon and nitrogen biogeochemistry of a Prairie Pothole Wetland, Stutsman County, North Dakota, USA
Ammonium in thermal waters of Yellowstone National Park: Processes affecting speciation and isotope fractionation
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2009 Annual Report
Source and fate of inorganic solutes in the Gibbon River, Yellowstone National Park, Wyoming, USA: I. Low-flow discharge and major solute chemistry
Development of assessment methodologies in support of USGS integrated science-Wyoming Landscape Conservation Initiative
Combined ecological and geologic perspectives in ecosystem studies
A regional soil and sediment geochemical study in northern California
A regional-scale study of chromium and nickel in soils of northern California, USA
Geomorphic controls on mercury accumulation in soils from a historically mined watershed, Central California Coast Range, USA
Spatial and seasonal variations in mercury methylation and microbial community structure in a historic mercury mining area, Yolo County, California
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
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Filter Total Items: 34
Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA
Millions of internally drained wetland systems in the Prairie Potholes region of the northern Great Plains (USA and Canada) provide indispensable habitat for waterfowl and a host of other ecosystem services. The hydrochemistry of these systems is complex and a crucial control on wetland function, flora and fauna. Wetland waters can have high concentrations of SO2-4 due to the oxidation of large amAuthorsChristopher T. Mills, Martin B. Goldhaber, Craig A. Stricker, JoAnn M. Holloway, Jean Morrison, Karl J. Ellefsen, Donald O. Rosenberry, Roland S. ThurstonShoreline surveys of oil-impacted marsh in southern Louisiana, July to August 2010
This report describes shoreline surveys conducted in the marshes of Louisiana in areas impacted by oil spilled from the Deepwater Horizon offshore oil drilling platform in the Gulf of Mexico. Three field expeditions were conducted on July 7-10, August 12-14, and August 24-26, 2010, in central Barataria Bay and the Bird's Foot area at the terminus of the Mississippi River delta. This preliminary reAuthorsRaymond F. Kokaly, David Heckman, JoAnn Holloway, Sarai C. Piazza, Brady R. Couvillion, Gregory D. Steyer, Christopher T. Mills, Todd M. HoefenCarbon and nitrogen biogeochemistry of a Prairie Pothole Wetland, Stutsman County, North Dakota, USA
The concentration and form of dissolved organic C (DOC) and N species (NH4+ and NO3-) were investigated as part of a larger hydrogeochemical study of the Cottonwood Lake Study Area within the Prairie Potholes region. Groundwater, pore water and surface wetland water data were used to help characterize the relationships between surface and groundwater with respect to nutrient dynamics. PhotosynthesAuthorsJoAnn M. Holloway, Martin B. Goldhaber, Christopher T. MillsAmmonium in thermal waters of Yellowstone National Park: Processes affecting speciation and isotope fractionation
Dissolved inorganic nitrogen, largely in reduced form (NH4(T)≈NH4(aq)++NH3(aq)o), has been documented in thermal waters throughout Yellowstone National Park, with concentrations ranging from a few micromolar along the Firehole River to millimolar concentrations at Washburn Hot Springs. Indirect evidence from rock nitrogen analyses and previous work on organic compounds associated with Washburn HotAuthorsJ.M. Holloway, D. Kirk Nordstrom, J.K. Böhlke, R. Blaine McCleskey, J. W. BallU.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2009 Annual Report
This is the second report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual work activities. The first report described work activities for 2007 and 2008; this report covers work activities conducted in 2009. Important differences between the two reports are that (1) this report does not lump all the Effectiveness Monitoring actAuthorsZachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Laura R. H. Biewick, Steven W. Blecker, R. Sky Bristol, Natasha B. Carr, Anna D. Chalfoun, Geneva W. Chong, James E. Diffendorfer, Bradley C. Fedy, Steven L. Garman, Stephen S. Germaine, Richard I. Grauch, JoAnn M. Holloway, Collin G. Homer, Matthew Kauffman, Douglas Keinath, Natalie Latysh, Daniel J. Manier, Robert R. McDougal, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Constance J. Nutt, Christopher J. Potter, Hall Sawyer, Spencer Schell, Sarah L. Shafer, David B. Smith, Lisa L. Stillings, Michele L. Tuttle, Anna B. WilsonSource and fate of inorganic solutes in the Gibbon River, Yellowstone National Park, Wyoming, USA: I. Low-flow discharge and major solute chemistry
The Gibbon River in Yellowstone National Park (YNP) is an important natural resource and habitat for fisheries and wildlife. However, the Gibbon River differs from most other mountain rivers because its chemistry is affected by several geothermal sources including Norris Geyser Basin, Chocolate Pots, Gibbon Geyser Basin, Beryl Spring, and Terrace Spring. Norris Geyser Basin is one of the most dynaAuthorsR. Blaine McCleskey, D. Kirk Nordstrom, David D. Susong, James W. Ball, JoAnn M. HollowayDevelopment of assessment methodologies in support of USGS integrated science-Wyoming Landscape Conservation Initiative
No abstract available.AuthorsRobert R. McDougal, JoAnn M. Holloway, Travis S. Schmidt, L.L. Stillings, L.W. Tuttle, S.W. BleckerCombined ecological and geologic perspectives in ecosystem studies
No abstract available.AuthorsJoAnn M. Holloway, Stephanie A. Ewing, Kate MaherA regional soil and sediment geochemical study in northern California
Regional-scale variations in soil geochemistry were investigated in a 20,000-km2 study area in northern California that includes the western slope of the Sierra Nevada, the southern Sacramento Valley and the northern Coast Ranges. Over 1300 archival soil samples collected from the late 1970s to 1980 in El Dorado, Placer, Sutter, Sacramento, Yolo and Solano counties were analyzed for 42 elements byAuthorsM. B. Goldhaber, J.M. Morrison, J.M. Holloway, R. B. Wanty, D.R. Helsel, D. B. SmithA regional-scale study of chromium and nickel in soils of northern California, USA
A soil geochemical survey was conducted in a 27,000-km2 study area of northern California that includes the Sierra Nevada Mountains, the Sacramento Valley, and the northern Coast Range. The results show that soil geochemistry in the Sacramento Valley is controlled primarily by the transport and weathering of parent material from the Coast Range to the west and the Sierra Nevada to the east. ChemicAuthorsJ.M. Morrison, M. B. Goldhaber, L. Lee, J.M. Holloway, R. B. Wanty, R.E. Wolf, J. F. RanvilleGeomorphic controls on mercury accumulation in soils from a historically mined watershed, Central California Coast Range, USA
Historic Hg mining in the Cache Creek watershed in the Central California Coast Range has contributed to the downstream transport of Hg to the San Francisco Bay-Delta. Different aspects of Hg mobilization in soils, including pedogenesis, fluvial redistribution of sediment, volatilization and eolian transport were considered. The greatest soil concentrations (>30 mg Hg kg-1) in Cache Creek are assoAuthorsJ.M. Holloway, M. B. Goldhaber, J.M. MorrisonSpatial and seasonal variations in mercury methylation and microbial community structure in a historic mercury mining area, Yolo County, California
The relationships between soil parent lithology, nutrient concentrations, microbial biomass and community structure were evaluated in soils from a small watershed impacted by historic Hg mining. Upland and wetland soils, stream sediments and tailings were collected and analyzed for nutrients (DOC, SO4=, NO3-), Hg, MeHg, and phospholipid fatty acids (PLFA). Stream sediment was derived from serpentiAuthorsJ.M. Holloway, M. B. Goldhaber, K.M. Scow, R.E. DrenovskyNon-USGS Publications**
Holloway, J. M., Dahlgren, R. A., Hansen, B. & Casey, W. H., 1998, Contribution of bedrock nitrogen to high nitrate concentrations in stream water: Nature 395, 785-788, https://doi.org/10.1038/27410.Holloway, J. M. & Dahlgren, R. A., 1999, Geologic nitrogen in biogeochemical cycling: Geology 27, 567-570, https://doi.org/10.1130/0091-7613(1999)027%3C0567:GNITBC%3E2.3.CO;2.Holloway, J.M. & Petersen, E.U., 1991 Mineralization and geochemistry of the Escalante silver mine, Iron County, Utah: (ed., Allison, M. Lee et al.) Utah Geological Association Publication 18, p 83-95.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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