John Johnston
Applied ecology is my general area of study and includes exposure model applications of mercury fate/transport and food web/bioaccumulation for risk management/risk reduction; hydro-ecology model simulation for aquatic receptors; coupling of geographic information systems and models for habitat and resource management assessments; upscaling and downscaling monitoring data and model output for multi-scale assessments; and model parameter estimation and uncertainty analysis for predictive analysis.
Biographical Information
Name: John Johnston
Title: Supervisory Ecologist
Contact Info:
Ecosystems Research Division
National Exposure Research Laboratory
Office of Research and Development
U.S. Environmental Protection Agency
960 College Station Road
Athens, Georgia 30605-2700
Phone: 706-355-8300
Email:
johnston.johnm@epa.gov
Education/Training
Ph.D. Ecology, University of Georgia, 1996
B.S. Chemistry, Xavier University, 1990
Professional Experience
Branch Chief, Regulatory Support Branch, USEPA, ORD, NERL-ERD, Athens, GA 2005–Present
Ecologist, USEPA, ORD, NERL-ERD, Athens, GA 1997-2005
ORISE Postdoctoral Fellow, USEPA, ORD, NERL-ERD, Athens, GA 1996–1997
Guest Lecturer, School of Ecology, University of Georgia 1993–1996
Graduate Research Assistant, University of Georgia, 1991-1996
GC/MS Chemist, International Technologies, Cincinnati, OH 1989–1991
Organic Extraction Chemist, Pearson Environmental, Inc., Cincinnati, OH 1998–1999
Selected Awards and Honors
EPA Silver Medal for Superior Service, 2010
NERL Teamwork Award, 2010
EPA STAA Level II Award, 2010
Exceptional/Outstanding ORD Technical Assistance to the Regions or Program Offices, 2009
ORD Science Communications Award, 2009
ORD Honor Award, Bronze Medal, 2007
EPA STAA Honorable Mention 2007, 2003
ORD Honor Award, Bronze Medal, 2005
Sigma Xi Outstanding Research Paper, 2004
Invited Lectures/Symposia
Johnston, J. M., M. Lowry, S. Beaulieu, and E. Bowles. State-of-the-Science Report on Predictive Models and Modeling Approaches for Characterizing and Evaluating Exposure to Nanomaterials. U.S. Environmental Protection Agency, Athens, GA. Publication No. EPA/600/R-10/129. (2010). Click here for PDF.
Johnston, J.M., 2010. "Community of Practice for Integrated Environmental Modeling (CIEM): A US EPA View" invited plenary talk at the OpenMI Life Final Meeting Integrating Models and Policy -- OpenMI Solutions for a Sustainable Future (Brussels, BE). Click here for PDF.
Johnston, J.M., G. Laniak, G. Whelan, D. Ames and N. Gaber. 2009. "USEPA's Ecological Exposure Modeling Science: Frameworks, Components and the Emerging Community of Practice for Reuse" invited keynote presentation at the International Society for Ecological Modeling Annual Meeting (Quebec, CA). Click here for PDF.
Ambrose R., J. Johnston, C. Knightes and E. Sunderland, 2006. “US EPA Office of Research and Development Mercury Modeling Research and Applications” invited presentation at the International Joint Commission/Ontario Ministry of the Environment Mercury Meeting: Niagara Falls, NY
Johnston, J. 2005. Watershed Health Assessment Tools-Investigating Fisheries (WHAT-IF?) invited talk at the Region IV Tiered Aquatic Life Use Workshop: Chattanooga, TN
Ambrose, R., J. Johnston and C. Knightes. 2005. “Tying it All Together: EPA Field Studies and Models Used in the Clean Air Mercury Rule.” And with Sunderland, E. “Integrated Risk Analysis in Coastal Ecosystems: The Example of Mercury” invited presentations at the EPA Science Forum Mercury Session. Washington, DC
Ambrose, R., J. Johnston and C. Knightes. 2005. “Models used for Multicompartment Simulation of Mercury Fate, Transport and Bioaccumulation” invited talk at the Mercury Workshop and Biennial Meeting of the International Joint Commission: Kingston, ON
Johnston, J. 2005. Application of the WHAT IF models to Gulf of Mexico Estuaries in Support of TALU” presentation at Region IV Headquarters
Selected Publications
Daniel McGarvey, J.M. Johnston. 2011. A Simple Method to Predict Regional Fish Abundance: An Example in the McKenzie River Basin, Oregon, Fisheries, 36:11, 534-546.
http://www.tandfonline.com/doi/pdf/10.1080/03632415.2011.626659
Johnston, J.M., McGarvey, D.J., Barber, M.C., Laniak, G., Babendreier, J., Parmar, R., Wolfe, K., Kraemer, S.R., Cyterski, M., Knightes, C., Rashleigh, B., Suarez, L., and Ambrose, R. 2011. An integrated modeling framework for performing environmental assessments: Application to ecosystem services in the Albemarle-Pamlico basins (NC and VA, USA). Ecological Modeling, 222: 2471-2484http://www.sciencedirect.com/science/article/pii/S0304380011001736
Daniel McGarvey, J.M. Johnston. 2011. Using a Macroecological Model to Predict Total Trout Abundance in the Willamette River Basin, Oregon. Fisheries, In Review.
Johnston, J. M., M. Lowry, S. Beaulieu, and E. Bowles. State-of-the-Science Report on Predictive Models and Modeling Approaches for Characterizing and Evaluating Exposure to Nanomaterials. U.S. Environmental Protection Agency, Athens, GA. Publication No. EPA/600/R-10/129. (2010). (PDF, 164 pp., 1 MB).
Daniel J. McGarvey, John M. Johnston, and M. Craig Barber. 2010. Predicting fish densities in lotic systems: a simple modeling approach. Click here.
Knightes, C.D., E.Sunderland, M.C. Barber, J.M. Johnston, and R.B. Ambrose. Application of Ecosystem-Scale Fate and Bioaccumulation Models to Predict Fish Mercury Response Times to Changes in Atmospheric Deposition. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, 28(4):881-893, (2009)
Johnston, J.M. 2007. Diversity Surfaces and Species Wavefronts: Adding the Dimension of Time. Pedobiologia 50(6):527-533 http://www.sciencedirect.com/science/article/pii/S0031405606000904
Johnston, J.M. et al. 2006. Watershed Health Assessment Tools Investigating Fisheries WHAT IF version 2.0: A Manager’s Guide to New Features EPA/600/R-06/109.
http://www.epa.gov/athens/publications/reports/Johnston600R06109WatershedHealthAssessment.pdf
Ambrose, R.B., J.M. Johnston, C.D. Knightes and E. Sunderland. 2005. Ecosystem Scale Modeling for Mercury Benefits Analysis. In: Regulatory Impact Analysis for the Clean Air Mercury Rule
Office of Air Quality Planning and Standards. EPA-452/R-05-003 http://www.epa.gov/ttnecas1/regdata/RIAs/mercury_ria_final.pdf
Rashleigh, B., R. Parmar, J. M. Johnston and M.C. Barber. 2005. Predictive habitat models for the occurrence of stream fishes in the Mid-Atlantic Highlands. North American Journal of Fisheries Management 25:1353-1366