My primary research interests are the study of the fate and transport of contaminants in the environment. My recent work focuses primarily on the environmental fate of mercury and arsenic. Specific research topics include investigation of natural sources of atmospheric mercury, the role of plants in biogeochemical cycling of mercury, mercury pollution in the Steamboat Creek- Truckee River Watershed, arsenic in the Humboldt River and in ground waters in Fallon, NV. I have also investigated the fate of trifluoroacetic acid and organophosphate pesticides. I am especially interested in the role that atmosphere and vegetation play as sources, sinks and pathways for the cycling of environmental contaminants.

• Gustin, M.S., Chavan, P.V., Dennett, K.E., Donaldson, S.E., Fernandez, G., Use of constructed wetlands with four different experimental designs to assess the potential for methyl and total Hg outputs accepted.

• Ericksen, J. A., Gustin, M. S. Air-surface exchange of mercury with soils amended with ash materials, Journal of Air and Waste Management Association in press

• Xin, M. Gustin, M.S., Ladwig, K., Plughoeft-Hassett, D.F., Air surface Hg exchange associated with landfill disposed coal combustion products, Accepted Journal of Air and Waste Management Association,

• Brown, S., Gustin, M., Saito, L. 2005 Characterization of mercury and water quality in Steamboat Creek and Wetland mesocosm,  Nevada Water Resources Association, in press.

• Millhollen, A., Obrist, D. Gustin, MS Mercury accumulation in grass and forb species as a function of carbon dioxide and mercury concentrations in air and soil, Chemosphere, in press.

• Millhollen, A. Gustin, MS, Obrist, D.  Foliar mercury accumulation and exchange for three tree species, submitted to Biogeochemistry.

• Engle, M.A., Gustin, MS, Johnson, D.W., Murphy, J.,Wright, J. and Markee, M. Mercury i>distribution in two Sierran forest and one desert sagebrush ecosystem and the effects of fire STOTEN, in press.

• Engle, M.A., Gustin, M.S., Goff, F., Counce, D.A., Janik, C.J., Bergfeld, D.,  Rytuba, J.R. Atmospheric Mercury Emissions from Substrates and Fumaroles associated with three Hydrothermal Systems in the Western United States,  Journal of Geophysical Research, in press

• Engle, M.A., Gustin, M.S., Lindberg, S.E., Gertler, A.W., Ariya, P.A., The Influence of Ozone on Atmospheric Emissions of Gaseous Elemental Mercury and Reactive Gaseous Mercury from Substrates, Atmospheric Environment, in press

• Xin, Mei, Gustin, M.S., Ladwig, K. Mercury release from coal combustion products, Fuel, in press.

• Ericksen, J.A. Gustin, MS., Lindberg, S.E., Olund, S., Krabbenhoft, D. 2005 Assessing the potential for re-emission of mercury deposited in precipitation from arid soils using a stable isotope,  Environmental Science and Technology, 39: 8001-8007.

• Ericksen, J. A., Gustin, M.S. Xin, M, Fernandez, GCJ Air soil exchange of mercury from background soils in the United States, in press Science of the Total Environment

• Gustin, M.S., Saito, L, Peacock, M. 2005 Mercury concentrations and C and N stable isotopes in fish of the Truckee River Watershed, Science of the Total Environment, 347:282-294 

• Gustin, M.S. and Stamenkovic, J. 2005  Mercury emissions from soils: Effect of watering and soil water content. Biogeochemistry, in press

• Stamenkovic, J., Gustin, M.S., Dennett, K.  2005 Net methyl mercury production and water quality improvement in constructed wetlands at Steamboat Creek, Nevada. Wetlands, 25, 748-457.

• Gustin, M.S., Lindberg, S.E.  2005 Terrestrial mercury fluxes: Is the net exchange up, down or neither? In Pironne, N. and Mahaffey, K.eds. Dynamics of Mercury Pollution on Regional and Global Scales: Atmospheric Processes, Human Exposure Around the World. Springer Publisher, Nowell, MA, USA Chapter11 p241-260.

• Gustin, M.S., Ericksen, J.A., Johnson, D.W., Lindberg, S.E., Coleman, J.S. 2004 Application of controlled mesocosm for understanding mercury plant-soil-air exchange.   Environmental Science and Technology 38: 6044-6050.

• Obrist, D., Gustin, M.S., Arnone, J.A., Johnson, D.W, Schorran, D.E., Verburg, P.J.  2004 Large annual mercury emissions to the atmosphere over Tallgrass Prairie ecosystems.  Atmospheric Environment, 39: 957-965.

• Gustin, M.S. and Ladwig, K.  2004 An assessment of the significance of mercury release from coal fly ash.  Journal of Air and Waste Management Association, 54:320-330.

• Nacht, D.M., and Gustin, M.S. 2004 Mercury emissions from background and altered geologic units throughout Nevada.  Water, Air and Soil Pollution, 151:179-193.

• Stamenkovic, J., Gustin, M.S., Marvin-DiPqsquale, M.C. Thomas, B.A., Agee, J.L.  2004 Distribution of total and methyl mercury in sediments along Steamboat Creek.  The Science of the Total Environment, 322:167-177.

• Nacht, D.A., Gustin, M.S., Engle, M.A., Zehner, R.Z., Giglini, A.D. 2004 Quantifying total and reactive gaseous mercury at the Sulphur Banks Mercury Mine Superfund Site, Northern California.  Environmental Science and Technology, 38 1977-1983.

• Frescholtz, T.F., Gustin, M.S.  2004 Soil and foliar mercury emissions as a function of soil concentration.  Water, Air and Soil Pollution, 155, 223-237.

• Ericksen, J.A., Gustin, M.S. 2004 Foliar exchange of mercury as a function of soil and air concentration, The Science of the Total Environment, 324: 271-279

• Ericksen, J.A., Gustin, M.S., Schorran, D.E., Johnson, D.W., Lindberg, S.E., Coleman, J.S. 2003 Accumulation of atmospheric mercury in forest foliage, Atmospheric Environment, 37:1612-1622, 2002.

• Frescholtz, T.F., Gustin, M.S.,Schorran, D.E., Fernandez, G.C.J. 2003 Assessing the source of mercury in foliar tissue of quaking aspen, Environmental Toxicology and Chemistry, 22:2114-2119, .

• Gustin, M.S. 2003 Are mercury emissions from geologic sources significant?: A status report,  a Science of the Total Environment, 304:153-167.

• Johnson, D., Benesch, J.A., Gustin, M.S., Schorran, D.S., Lindberg, S.E., Coleman, J.S.  2003 Experimental evidence against diffusion control of Hg evasion from soils, Science of the Total Environment, 304:175-184.

• Zehner, R. E., Gustin, M.S. 2002 Estimation of mercury vapor flux from natural substrate in Nevada,  Environmental Science and Technology, 36:4039-4045.

• Zhang, H., Lindberg, S.E., Gustin, M.S., Xu, X. 2002 Towards a better understanding of mercury emissions from soils, in Biogeochemistry of Environmentally Important Trace Elements, Cai Y and Braids, O.C. eds. American Chemical Society Washington DC, 246-261.

• Kuwabara, J.S., Marvin-Dipasquale, M., Praskins, W., Byron, E., Toppin, B.R., Carter, J.L., Fend, S.V., Parchase, F., Krabbenhoft, D.P., Gustin, M.S. 2002 Flux of dissolved forms of mercury across the sediment-water interface in Lahontan Reservoir, Nevada, U. S. Geological Survey Water Resources Investigation Report 02-4138.

• Coolbaugh, M. F. Gustin, M.S., Rytuba, J.J. 2002 Annual emissions on mercury to the atmosphere from three natural source areas in Nevada and California, Environmental Geology, 42:338-349.

• Gustin, M. S., Biester, H., Kim, C. 2002 Investigation of light enhanced emissions of mercury from naturally enriched substrate, Atmospheric Environment, 36:3241-3254.

• Sladek, C., Gustin, M.S. 2002  Evaluation of sequential extraction methods for determination of mercury speciation and mobility in mine waste,  Applied Geochemistry, 2002, 18/4:567-576.

• Sladek, C., Gustin, M.S. , Biester, H., Kim, C. 2002 Application of three methods for determining mercury speciation in mine waste,  Geochemistry: Exploration, Environment, Analysis, 2/4:369-375.

• Gustin, M.S., Coolbaugh, M, Engle, M., Fitzgerald, B., Keislar, R., Lindberg, S., Nacht, D., Quashnick, J., Rytuba, J., Sladek, C, Zhang, H., Zehner, R. 2003 Atmospheric mercury emissions from mine wastes and surrounding geologically enriched terranes, Environmental Geology, 43:339-351.

• Lindberg, S.E., Zhang, H., Vette, A.F., Gustin, M.S., Barnette, M.O., Kuiken, T.  2002 Dynamic flux chamber measurement of gaseous mercury emission fluxes over soils: effect of flushing flow rate and verification of a two-resistance exchange interface simulation model, Atmospheric Environment, 36:847-859.

• Zhang, H., Lindberg, S.E., Barnette, M. O., Vette, A.F., Gustin, M. S. 2002 Simulation of gaseous mercury emissions from soils measured with a dynamic flux chambers using a two-resistance model, Atmospheric Environment, 36: 835-846.

• Engle, M.A., Gustin, M.S. 2002 Scaling up atmospheric mercury emissions from three naturally enriched areas: Flowery Peak, Nevada, Peavine Peak, Nevada and Long Valley Caldera, California, Science of the Total Environment, 290(1-3):91-104.

• Benesch, J.A., Gustin, M.S. 2002  Uptake of Trifluoroacetate by Pinus Ponderosa Via Atmospheric Pathway, Atmospheric Environment, 36:1233-1235.

• Benesch, J. A., Gustin, M.S., Cahill, T.M. 2002  Investigation of effects of trifluoroaetic acid on vernal pool ecosystems, Environmental Toxicology and Chemistry, 21:640-647.

• Fischer, P., Gustin, M.S. 2002 Influence of natural sources on mercury in water, sediment and aquatic biota in seven tributaries of the East Fork of the Upper Carson River, California, Water, Air, and Soil Pollution, 133 (1-4):2283-295.

• Edwards, G.C., Rasmussen, P. E., Schroeder, W.H., Kemp, R. J., Dias, G. M., Fitzgerald-Hubble,C.R., Wong, E.K.,Halfpenny-Mitchell, R.J., Gustin, M.S.  2001Sources of Variability in Mercury flux measurements, Journal of Geophysical Research Atmospheres, 106(D6):5421-5435.

• Engle, M.A., Gustin, M. S., Zhang, H.  2001Quantifying natural source mercury emissions from the Ivanhoe Mining District, north-central Nevada, USA, Atmospheric Environment, 35:3987-3997.

• Blum, M., Gustin, M.S., Swanson, S., Donaldson, S.D.  Total and methyl mercury in water and sediments of Steamboat Creek, Nevada: Implications for Stream Restoration, Journal of American Water Resources Association, 37: 795-804, 2001.

• Gerlach, R.W., Gustin, M.S., and VanEmon, J.M.  On-site mercury analysis of soil at hazardous waste sites by immunoassay and ASV,  Applied Geochemistry, 16(3):281-290, 2001.

• Gustin, M.S., Lindberg, S.E., Austin, K., Coolbaugh, M., Vette, A., Zhang, H.  Assessing the contribution of natural sources to regional mercury budgets, The Science of the Total Environment, 259:61-72, 2000.

• Gustin, M.S., Lindberg, S.E.  Accessing the contribution of natural sources to the global mercury cycle: The importance of intercomparing dynamic flux measurements, Fresenius's Journal of Analytical Chemistry, 1999.

• Cahill, T.M., Benesch, J.A., Gustin, M.S., Zimmerman, E.., Seiber, J.  Simplified method for trace analysis of trifluoroacetic acid analysis in plant, soil and water samples using headspace gas chromatography, Analytical Chemistry, 71:4465-4471, 1999.

• Gustin, M.S., Lindberg, S.E., Marsik, F., Casimir, A., Ebinghaus, R., Edwards, G., Fitzgerald, C., Kemp, J., Kock,H., Leonard, T., Majewski, M., Owens, J., Poissant, L., Rasmussen, P., Schaedlich, F., Schneeberger, D., Sommar, J., Turner, R., Vette, A., Wallschlaeger, D., Xiao, Z.  The Nevada STORMS mercury flux methods intercomparison, JGR- Atmospheres, 21:831-844, 1999.

• Lindberg , S.E., Zhang ,H., Gustin, M.S., Casimir, A., Ebinghaus, R., Edwards, G., Fitzgerald, C., Kemp, J., Kock, H., Leonard, T., Majewski, M., Marsik, F., Owens, J., Poissant,L., Rasmussen, P., Schneeberger, D., Sommar, J. Turner, R., Vette, A., Wallschlaeger, D., Xiao, Z.  The role of rainfall and soil moisture on mercury emissions from mercuiferous desert soils, JGR Atmospheres, 21:879-888, 1999.

• Gustin , M.S., Ramussen, P., Edwards, G., Schroeder, W.  Use of a laboratory gas exchange chamber to predict in situ mercury emissions and to understand the light enhancement of mercury flux, JGR-Atmospheres, 21:873-878, 1999.

• Kido, H., Szurdoki, F., Gustin, M.S. Hammond, B.  Chelate sensor method for mercury in Metals and Genetics, Sarkar ed., Kluwer Academic/Plenum publishers, New York p 101 -116, 1999.

• Gustin, M.S., Maxey, R.A., Rasmussen, P., Beister, H.  Mechanisms influencing the volatile loss of mercury from soil, Symposium volume of the Air and Waste management Association on the Measurement of Toxic and Related Air Pollutants, Cary ,NC, p 224-235, 1999.

• Gustin, M.S.  NvMEP : Nevada Mercury Emissions Project-Mercury flux measurements: An intercomparison and assessment, Published Electric Power Research Institute Report, TR-111346, 1998.

• Leonard, T.L., Taylor, G.E., Gustin, M.S, Fernandez, G.C.J.  Mercury and plants in contaminated soils: Uptake, partitioning and flux to the atmosphere, Environmental Toxicology and Chemistry, 17:2063-2071, 1998.

• Gustin, M.S., Taylor, G.E., Jr., Maxey , R.A.  Effect of Temperature, Wind velocity and Concentration on the flux of Elemental Mercury from Mill Tailings to the Atmosphere, Journal of Geophysical Research, 102:3891-3898, 1997.

• Gustin, M.S., Taylor, G.E., Jr., Leonard, T.L., Keislar, R.E.  Atmospheric Mercury Concentration Associated with Natural and Anthropogenic Enriched Sites Central Western, Nevada, Environmental Science and Technology, 30:2572-2579, 1996.

• Taylor, G.E., Jr., Schaller, K.B., Geddes, J.D. Gustin, M.S., Larsen, G.B., Miller, G.C.  Ecology, Toxicology, and Chemical Fate of Methyl Isothiocyanate in Riparian Soils form the Upper Sacramento River, Environmental Toxicology and Chemistry, 15:1695-1701, 1996.

• Gustin, M.S., Taylor, G.E., Jr., Leonard, T.L.  Atmospheric Mercury Concentrations above Contaminated Mill Tailings, Carson River Drainage Basin, Nevada, Water Air and Soil Pollution, 80:217-220, 1995.

• Gustin, M.S., Taylor, G.E., Jr., Leonard, T.L.  High Levels of Mercury Contamination in Multiple Media of the Carson River Drainage Basin of Nevada: Implications for Risk Assessment, Environmental Health Perspective, 102:772-778, 1994.

• Gustin, M.S.  Stratigraphy and Alteration of the Host Rocks, United Verde Massive Sulfide deposit, Jerome, Arizona: Economic Geology, 85:29-49, 1990.

• Eastoe, C.J., Gustin, M.S., Hurlbut, D.F., Orr, R.F.  Sulfur Isotopes In Early Proterozoic Volcanogenic Massive Sulfide Deposits: New Data From Arizona and Implications For Ocean Chemistry: Precambrian Research, 46:353-364, 1990.

• Lindberg, P.A., Gustin, M.S.  Field-trip Guide to the Geology, Structure, and Alteration of the Jerome, Arizona Ore Deposits, p. 176-181, 1987.

Papers Presented at Professional Meetings

• Millhollen, A.G., Gustin, M.S. 2005 Quantifying foliar mercury accumulation and exchange using varying atmospheric and soil concentrations Geological Society of America, Cordilleran Section meeting, April 29- May 1, San Jose, CA Invited presentation.

• Chavan, R. V., Gustin, M.S., Dennett, K. E. 2005 Assessment of mercury transformation in constructed wetlands, Geological Society of America, Cordilleran Section meeting, April 29- May 1, San Jose, CA, Invited presentation.

• Ericksen, J.A., Gustin, M.S., Lindberg, S.E., Olund, S. D., Krabbenhoft, D.P. 2005 Assessing the potential for re-emission of mercury deposited in preciptation from arid soils using a stable isotope, Geological Society of America, Cordilleran Section meeting, April 29- May 1, San Jose, CA Invited presentation.

• Gustin, M., Engle, M., Ericksen, J, Xin, M., Krabbenhoft, Lindberg, S., Olund, S., Rytuba, J. 2005 New insights into mercury exchange between air and substrate. Invited paper International Goldschmidt Conf. May 20-25 Moscow Idaho

• Gustin, M., Chavan, R., Stamenkovic, J., Ericksen, J., Brown, S., Saito, L., Dennett, K., Marchand, E., Donaldson, S. The potential for methyl mercury production in constructed wetlands and a riparian setting Invited paper International Goldschmidt Conference May 20-25 Moscow Idaho

• Gustin, M., Johnson, D., Weisberg, P., Rytuba, J., Lindberg, S., Zhang, H. Ericksen, J., Engle, M., Fay, L., Giglini, T., Kuiken, T., Lyman, S., Xin, M., 2005 Assessment of natural source (geologic and vegetation) mercury emissions: Speciation, mechanisms and significance, Invited paper International Air Quality V meeting, Arlington VA Sept 19-21.

• Xin, M., Gustin, M., Ladwig, K. 2005 Mercury release from coal combustion products International World of Coal Ash meeting Lexingon KY April 11-15.

• Xin, M., Gustin, M., Ladwig, K. 2005 Mercury Release from coal combustion by-products. Electric Utilities Environmental Conference Tucson Az Jan 24 to 26.

• Gustin, M., Lindberg, S. 2005 Why do we care about terrestrial sources and sinks of atmospheric Hg? Electric Utilities Environmental Conference Tucson Az Jan 24 to 26.

• Gustin, M., Chavan R., Dennett, K., Marchand, E. Saito, L., Donaldson, S. 2005 Use of constructed wetlands to aid decision making on restoration methods for a mercury contaminated watershed USDA-CSREES National Water Quality Conference San Diego CA Feb 6 to 10

• Kuiken, T., Zhang, H., Lindberg, S., Crocker, C., Gustin, M. Natural mercury emissions from southeast background forest soils: An on-going study within the Standing Stone Forest of Tennessee 56^th Southeast Regional Meeting American Chemical Society Nov 10-13.

• Stamenkovic J, Obrist D, Arnone JA, Schorran DE, Verburg PSJ, Johnson DW, Gustin MS. 2004. Mercury emissions from tallgrass prairie ecosystems. 89^th Annual Meeting of the Ecological Society of America, Portland, Oregon (USA).

• Gustin, MS, Zehner, R. Stamenkovic, J. 2004 Experimental examination of the effect of precipitation and moisture content on mercury emission from soils, 7^th International Conference on Mercury as a Global Pollutant, Ljubljana, Slovenia, June 27-July 2.

• Gustin, MS, Ladwig, K, Xin, M., Zehner, R. 2004 Assessment of the significance of mercury release from coal fly ash, 7^th International Conference on Mercury as a Global Pollutant, Ljubljana, Slovenia, June 27-July 2.

• Engle, MA, Gustin, MS, Goff, F, Janik, CJ, Counce, DA, Rytuba, J 2004 Atmospheric mercury emission from substrate and fumaroles associated with three hydrothermal systems in the western United States, 7^th International Conference on Mercury as a Global Pollutant, Ljubljana, Slovenia, June 27-July 2.

• Engle, MA, Gustin, MS, Lindberg, SE, Gertler, A.2004 Effects of atmospheric oxidants on Hg release from substrate, 7^th International Conference on Mercury as a Global Pollutant, Ljubljana, Slovenia, June 27-July 2.

• Obrist, D, Gustin, MS, Arnone, JA, Johnson, DW, Schorran, DE, Verberg PSJ 2004 Large annual Hg emissions over tallgrass prairie grasslands indicate vegetated terrestrial ecosystems to be sources of Hg to the atmosphere, 7^th International Conference on Mercury as a Global Pollutant, Ljubljana, Slovenia, June 27-July 2.

• Gustin, MS, Lindberg, SE. 2004 Terrestrial Hg fluxes is the net exchange up or down Invited presentation International workshop on Harmonization of Mercury Measurement Methods and Models to Assess Source Receptor Impact on Air Quality and Human Health Maratea Italy May

• Obrist D, Gustin MS, Arnone JA, Schorran DE, Verbur PSJ, Johnson DW (2003). Large annual Hg emissions over Tallgrass Prairie grasslands indicate higher natural loading of Hg to the atmosphere than previously estimated. Poster Presentation; first Swiss Geosciences Meeting, 28_29 November, 2003, Basel, Switzerland.

• Gustin, M. Ladwig, K Mercury releases from coal fly ash: are they significant? 2003American Coal Ash Association, October 6 to 8 Las Vegas, NV

• MS Gustin K Ladwig 2003 Release of mercury to air from coal fly ash MS Gustin K Ladwig 2003 International Ash Utilization Conference Oct 2003 Lexington KY

• Walker, M., Benson, M., Gustin, M.S. 2003 Arsenic and Arsenic (III) in tap water samples: Implications for exposure in Churchill County, Nevada, 2003 Annual Water Resources Conference, American Water Resources Association, November 3 to 6 San Diego, CA.

• Gustin, M. 2003 Overview of Hg and importance of atmospheric deposition, US EPA Region IX multimedia workshop: "Air Deposition in the Pacific Southwest: Understanding the Impacts on Water Quality, December 3-4 San Francisco, CA, Invited speaker

• Gustin, M 2003 Quantifying the role of significant natural sources and sinks in the biogeochemical cycle of mercury, EPA STAR mercury fate and transport final progress review workshop, November 21, Washington, D.C. , invited speaker.

• Obrist, D. Gustin, M.S. Arnone, J.A., Schorran, D.E. , Verberg, P.S., Johnson, D.W., 2003, Vegetated terrestrial ecosystems are large sources of mercury to the atmosphere Eos Trans. AGU 84(46), Fall Meeting Supplement Abstract B51D-1002, San Francisco, December 2003.

• Engle, M.A., Gustin, M.S., Lindberg, S.E., Gertler, A.W., 2003, Exacerbation of atmospheric mercury emissions from substrate by atmospheric oxidants. Eos Trans. AGU 84(46), Fall Meeting Supplement Abstract B21D-0750, San Francisco, December 2003.

• Zehner, R, Gustin, M. 2003 Quantifying mercury emissions from base and precious metal deposits and oil and gas fields, Air and Waste Management Association, San Diego, CA June, invited presentation.

• Stamenkovic, J. Gustin, M.S., Dennett, K. E. 2003 Net methylmercury production in constructed wetlands with three experimental designs at Steamboat Creek (Nevada, USA) Invited presentation, American Society of Limnology and Oceanography, Feb 8-14, 2003, Salt Lake City, UT

• Thomas, B.A. Gustin, M.S. Identifying the sources of total and methyl mercury in the anthropogenically impacted Steamboat Creek, Nevada, USA Invited presentation, American Society of Limnology and Oceanography, Feb 8-14, 2003, Salt Lake City, UT

• Giglini, A. D., Gustin, M.S. Development of a mercury mass balance for the Incline Creek Watershed, Lake Tahoe, NV Invited presentation, American Society of Limnology and Oceanography, Feb 8-14, 2003, Salt Lake City, UT

• Gustin, M.S.  Unraveling the role of natural ecosystems in the biogoechemical cycle for mercury, Air Quality III Conference, Washington, D.C., Sept. 2002.

• Gustin, M.S., Ladwig, K., Giglini, T., Piper, J.  Measurement of the potential for mercury releases from coal fly ash, Air Quality III Conference, Washington, D.C., Sept. 2002.

• Gustin, M.S.  Quantifying the role of significant sources and sinks in the biogeochemical cycle of mercury, EPA Science Forum, Washington, D.C., May 2002.

• Gustin, M.S.Benesch, J. Frescholtz, T.Schorran, D.Johnson, Lindberg, S.E. Coleman, J.  Forests as sources of new mercury to ecosystems, ASLO meeting, Victoria BC, June 2002.

• Brown, G.E., Kim, C.S., Shaw, S., Lowry, G.V., Rytuba, J.J., Gustin, M.S.  Processes controlling the chemical/isotope speciation and distribution of mercury from contaminated mine sites, American Chemical Society National Meeting, April 2002.

• Gustin, M.S., Nacht, D., Giglini, T., Engle, M.  Speciation of mercury in the atmosphere above naturally and anthropogenically mercury enriched substrate, American Chemical Society National Meeting, April 2002.

• Gustin, M.S., Benesch, J.A, Schorran, D.E., Johnson, D.A., Lindberg, S.E., Coleman, J. Investigation of the role of plants in thee biogeochemical cycling of mercury using large mesocosms, American Chemical Society National Meeting, April 2002.

• Gustin, M.S.  The significance of mercury emissions from natural sources, Electric Utilities Environmental Conference, Tucson, AZ, Jan 2002.

• Fiztgerald, B, Wlaker, M.J, Gustin M.S., Davidson, J.  Arsenic in domestic wells in Churchill County, Nevada, Nevada Water Resources Association Annual Conference, Las Vegas, NV, 2002.

• Frescholtz, T.F., Gustin, M.S., Schorran, D.E.  The role of vegetation in mercury cycling at mercury enriched mine sites, American Geophysical Union Meeting, San Francisco, CA, Dec 2001.

• Nacht, D.,Gustin, M.S., Engle, M., Zehner, R.E., Giglini, T.  Quantifying total and reactive gaseous mercury emissions from the Sulphur Bank Mercury Mine Superfund Site, Northern CA, American Geophysical Union Meeting, San Francisco, CA, Dec 2001.

• Gustin, M. Sexauer, Coolbaugh, M. , Engle, M., Fitzgerald, B., Lindberg, S.E., Nacht, D., Rytuba, J., Zehner, R.  The significance of mercury emissions from geologic sources, 6^th International Conference on Mercury as Global Pollutant, Minamata, Japan, October 2001.

• Gustin, M.S., Benesch, J.A., Schorran, D.E., Johnson, D.A., Lindberg, S.A., Coleman, J. Assessing the effect of plants on mercury emissions from substrate, The 6^th International Conference on Mercury as Global Pollutant, Minamata, Japan, October 2001.

• Benesch, J.A., Gustin, M.A., Schorran, D.E., Coleman, J., Johnson, D.A., Lindberg, S.E., Determining the role of plants in the biogeochemical cycling of mercury on an ecosystem level, The 6^th International Conference on Mercury as Global Pollutant, Minamata, Japan, October 2001.

• Johnson, D.W., Benesch, J.A., Gustin, M.S., Schorran, D.E., Coleman, J., Lindberg, S.E.  Soil gaseous Hg concentrations: Evidence against diffusive control of flux, The 6^th International Conference on Mercury as Global Pollutant, Minamata, Japan, October 2001.

• Gustin, M. S., Coolbaugh, M., Engle, M., Fitzgerald, B., Lindberg, S., Nacht, D., Rytuba, J., Zehner, R.  Putting into perspective mercury emissions from geologic sources, E.P.A. sponsored Workshop on the fate, transport and transformation of mercury in aquatic and terrestrial environments, West Palm Beach, FL, May 2001.

• Gustin, M.S., Benesch, J.A., Schorran, D.E., Johnson, D.A., Lindberg, S.E., Coleman, J. Assessing the role of plants in the biogeochemical cycle of mercury, E.P.A. sponsored Workshop on the fate, transport and transformation of mercury in aquatic and terrestrial environments, West Palm Beach, FL, May 2001.

• Walker, M., Gustin, M.  Rank and parametric-based approaches to interpreting grab sampling data for total maximum daily load determination.  7th Federal Interagency Sedimentation, March 2001.

• Engle, M.A., Tempel, R.A., Gustin, M.S.  Distribution and transport of mercury from epithermal hot-spring type deposits, accepted, Fifth International Conference on Acid Rock Drainage.

• Lindberg, S.E., Zhang, H.A., Gustin, M.S., Brooks, S.  Mercury Emissions and re-emissions from diffuse area sources: the dilemma of small emissions from large surfaces, The "Inert" nature of elemental mercury vapor, and missing sinks in the global mercury cycle, EPA Meeting on Assessing and Managing Mercury from Historic and Current Mining Activities, San Francisco, CA, Nov. 2000.

• Zehner, R. E. and Gustin, M.S.  Estimation of mercury vapor flux from mine waste, symposium volume, EPA Meeting on Assessing and Managing Mercury from Historic and Current Mining Activities, San Francisco, CA, Nov. 2000.

• Gustin, M.S., Coolbaugh, M., Engle, M., Fitzgerald, B., Nacht, D., Zehner, R., Sladek, C., Keislar, R., Rytuba, J., Lindberg, S., Zhang, H.  Atmospheric Mercury emissions from mine waste, symposium volume, EPA Meeting on Assessing and Managing Mercury from Historic and Current Mining Activities, San Francisco, CA, Nov. 2000.

• Gustin, M.S.  Mercury emissions from mine waste, EPA Meeting on Assessing and Managing Mercury from Historic and Current Mining Activities, San Francisco, CA, Nov. 2000.

• Sladek, C., Gustin, M.S.  Evaluation methods for predicting potential mobility of mercury in waste associated with historic mercury and gold mining, EPA Meeting on Assessing and Managing Mercury from Historic and Current Mining Activities, San Francisco, CA, Nov. 2000.

• Gustin, M.S.  The role of naturally mercury enriched substrate and background substrate in the global cycling of mercury, Geological Society of America National Meeting, Reno, NV, Nov. 2000.

• Sladek, C., Gustin, M.S.  Evaluation methods for predicting the potential mobility of mercury in mine waste, Geological Society of America National Meeting, Reno, NV, Nov. 2000.

• Gustin, M.S., Coolbaugh, M.F.,  Engle, M.A.  Emissions of mercury to the atmosphere from natural sources in Nevada and California, Proceedings 25^th International Conference on Heavy Metals in the Environment, Ann Arbor, MI, Aug. 2000.

• Sladek, C., Gustin, M.S.  Investigation of sequential extraction methods for determination of mercury species in sediments, Proceedings 25^th International Conference on Heavy Metals in the Environment, Ann Arbor, MI, Aug. 2000.

• Engel, M.A., Tempel, R.N., Gustin, M.S. 2000 Hydrogeochemistry of groundwater associated with epithermal hot-spring-type Hg deposits, Proceedings Fifth International Conference on Acid Rock Drainage, Vol.1, pp379-387.

• Gustin, M.S. and Lindberg, S.E. 1999 Assessing the contribution of natural sources to regional atmospheric mercury budgets, Proceedings of the Fourth International Conference on Managing Hazardous Air Pollutants, EPRI Report Tr-111024, pp3-57 to 3-70.

• Benesch, J.B., Gustin, M.S., Cahill, T., Seiber, J.  Uptake of trifluoroacetic acid in plants via root and atmospheric pathways, Society of Environmental Toxicology and Chemistry 20^th Anual meeting, Philadelphia, PA, Nov. 1999.

• Gustin, M.S.  Are sources other than anthropogenic point sources significant to the atmospheric mercury budget, National Atmospheric Deposition Network Technical Committee Meeting, Sacramento, Ca, Oct. 1999.

• Cahill, T., Benesch, J.A., Gustin, M., Seiber, J.  Simplified method for trace analysis of trifluoroacetic acid in plant, soil, and water samples using headspace gas chromatography, American Chemical Society Fall meeting, New Orleans, LA, Aug. 2000.

• Gustin, M.S.  Emissions of mercury from contaminated mine waste, Geological Society of America Cordillerau, Section-Session on mercury in the environment, June 1999.

• Gustin, M.S., Lindberg, S.E.  Assessing contribution of natural resources to regional atmospheric mercury budgets, 5^th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 1999.

• Gustin, M.S., Lindberg, S.E., Allan, M.A., Ebinghaus, R., Edwards, G., Majewski, M., Marsik, F., Poissant, L., Rasmussen, P., Schaedlich, F., Sommer, J., Turner, R., Vette, A., Wallschlaeger, D.  Desert SToRMS: A field intercomparison of methods utilized for measurement of mercury flux from terrestrial landscapes, 5^th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 1999.

• Gustin, M.S., Lindberg, S.E.  Assessing the emission of mercury from naturally enriched terrestrial surfaces, Electrical Utilities Environmental Conference, Tucson, AZ, Jan. 1999.

• Gustin, M.S. Nevada SToRMS, Summary of data, Mercury experts workshop hosted by EPRI, Canadian Geological Survey, and University of Guelph, Canada, 1998.

• Gustin, M.S.  Light enhancement of mercury emissions, Mercury experts workshop hosted by EPRI, Canadian Geological Survey, and University of Guelph, Canada, 1998.

• Gustin, M.S.  Mechanisms influencing the volatile loss of mercury from soil, Air and Waste Management Association Meeting-Measurements of toxics and Related Air Pollutants, Cary, NC, 1998.

• Engle, M., Tempel, R., Wallace, A., Gustin, M.  Natural levels of mercury in groundwaters associated with opalite-hosted mercury deposits, Ivanhoe Mining district, Geological Society if America National Meeting, Oct. 1998.

• Austin,  K., Gustin, M.S., Tarnay, L.  Application of GIS for constraining mercury emissions from geologically enriched areas, Geological Society if America National Meeting, Oct. 1998.

• Smale, S.J., Qualls, R.G., Gustin, M.S. Factors controlling the mercury reduction in soils, Soil and Science Society of America Meeting, 1998.

• Gustin, M.S., Lindberg, S.E.  Assessing the contribution of natural sources to regional atmospheric mercury budgets, Conference on Managing Hazardous Air Pollutants, Washington, D.C., Nov. 1997.

• Gustin, M.S.  Natural sources of atmospheric mercury, Invited Speaker, Symposium on Mercury Elimination and Reduction: Towards a North American Partnership, Toronto, California, May 1997.

• Gustin, M.S., Taylor, G.E., Jr.  Light induced flux of mercury from substrate, Mercury as a Global Pollutant, Hamburg, Germany, Aug. 1996.

• Leonard, T.L., Gustin, M.S., Taylor, G.E., Jr.  Mercury volatilization from Riparian vegetation, Mercury as a Global Pollutant, Hamburg, Germany, Aug. 1996.

• Gustin, M.S., Taylor, G.E., Jr.  Mercury evasion to the atmosphere: effects of temperature, wind velocity, and substrate mercury concentration, American Chemical Society 210^th National Meeting, Chicago, IL, 1995.

• Gustin, M.S., Taylor, G.E, Jr., Leonard, T.L. Mercury contamination of the atmosphere from mill tailings, Carson River Drainage Basin, Central Western Nevada, Geological Society of America Abstracts with Program, v.26, no.7, 1994.

• Gustin, M.S.  The Lake Tahoe Basin, an ideal setting for teaching hydrogeology and water resource management, American Water Resources Association Annual Meeting, Chicago, IL, 1994.

• Gustin, M.S., Taylor, G.E.  Natural sources of mercury in arid and semiarid landscapes of Western North America, Society of Ecological Toxicologists and Chemists 15^th Annual meeting, 1994.

• Gustin, M.S., Taylor, G.E., Jr., Leonard, T.L. Mercury evasion from contaminated landscape elements, Carson River Superfund Site, Nevada, abstract EPRI International Conference on Mercury, July 1994.

• Gustin, M.S. Geology and geochemistry of the host rocks for the Proterozoic United Verde Volcanic Massive Sulfide Deposit, Jerome, Arizona, Geological Society of America Abstracts with Program, v. 22, p. A14, Nov. 1990.

• Gustin, M.S.  Geochemistry and mineralogy of alteration associated with the United Verde Syngenetic Massive Sulfide, Jerome, Arizona, Geological Society of America Abstracts with Program, v. 19, no. 7, p. 688, 1987.

• Eastoe, C.J., Gustin, M.S., Hurlbut, D.F., Orr, R.L.  Sulfur isotope in Proterozoic syngenetic sulfide deposits, Arizona, Implications for geochemistry of seawater-rock  interaction, Geological Society of America Abstracts with Program, v. 19, no. 7, p. 650, 1987.

• Hughes, E.H., Gustin, M.S., Butler, J.R.  Hydrothermal alteration system in Granville County, Northern California Slate Belt, Geological Society of America Abstracts with Program, v. 18, no. 3, p. 227, 1986.