Christopher M. Oswalt

Research Forester

4700 Old Kingston Pike
Knoxville, TN 37922

Phone: 865-862-2068
christopher.oswalt@usda.gov

Research
Education
and Experience
Publications
and Products

Current Research

My current research includes the monitoring and assessment of forest resources at multiple geographic and taxonomic scales. Specific research topics include the assessment of growth and removals in the Appalachian Ecoregion, understanding the impact of the Southern pine beetle on pine forests of the South, tracking temporal shifts of forest communities in Tennessee and Kentucky and the role of nonnative invasive plants in the alteration of forested systems. In addition, my responsibilities include:
1) Lead Forest Inventory Analyst for Tennessee and Kentucky
2) Southern Lead for Invasive Species

Education

Ph.D. in Natural Resources, Silviculture, 2008: The University of Tennessee
M.S. in Forest Ecology, 2003: The University of Tennessee
B.S. in (Forest Resource Management, Minor: Statistics, 1999: The University of Tennessee

Featured Publications and Products

Oswalt, Christopher M.; Woodall, Christopher W.; Brooks, Horace W. 2015. Is the footprint of longleaf pine in the Southeastern United States still shrinking?.
Oswalt, C.M.; King, C.R. 2014. Forests of Tennessee, 2012.
Desprez, Johanna; Iannone III, Basil V.; Yang, Peilin; Oswalt, Christopher M.; Fei, Songlin. 2014. Northward migration under a changing climate: a case study of blackgum (Nyssa Sylvatica).
Hart, Justin L.; Oswalt, Christopher M.; Turberville, Craig M. 2014. Population dynamics of sugar maple through the southern portion of its range: implications for range migration.
Oswalt, Christopher M.; Oswalt, Sonja N.; Moser, W. Keith. 2012. Potential impacts of year-round sampling on monitoring presence- absence of invasive flora in the southern United States.

Publications

Insu, Jo; Fei, Songlin; Oswalt, Christopher M.; Domke, Grant M.; Phillips, Richard P. 2019. Shifts in dominant tree mycorrhizal associations in response to anthropogenic impacts.
Brandeis, T.J.; Hartsell, A.J.; Randolph, K.C.; Oswalt, C.M. 2018. Forests of Virginia, 2016.
Fei, Songlin ; Jo, Insu ; Guo, Qinfeng ; Wardle, David A.; Fang, Jingyun ; Chen, Anping ; Oswalt, Christopher M.; Brockerhoff, Eckehard G. 2018. Impacts of climate on the biodiversity-productivity relationship in natural forests.
Brandeis, Thomas J.; Hartsell, Andrew J.; Randolph, KaDonna C.; Oswalt, Christopher M. 2018. Virginia’s forests, 2016.
Fei, Songlin; Desprez, Johanna M.; Potter, Kevin M.; Jo, Insu; Knott, Jonathan A.; Oswalt, Christopher M. 2017. Divergence of species responses to climate change.
Oswalt, Christopher. 2017. Forests of Kentucky, 2013.
Russell, Matthew B.; Woodall, Christopher W.; Potter, Kevin M.; Walters, Brian F.; Domke, Grant M.; Oswalt, Christopher M. 2017. Interactions between white-tailed deer density and the composition of forest understories in the northern United States.
Guo, Qinfeng; Iannone III, Basil V.; Nunez-Mir, Gabriela C.; Potter, Kevin M.; Oswalt, Christopher M.; Fei, Songlin. 2017. Species pool, human population, and global versus regional invasion patterns.
Brandeis, Thomas; Zarnoch, Stanley; Oswalt, Christopher; Stringer, Jeffery. 2017. The lack of adequate quality assurance/quality control data hinders the assessment of potential forest degradation in a national forest inventory.
Oswalt, Christopher M.; Fei, Songlin; Guo, Qinfeng; Iannone III, Basil V.; Oswalt, Sonja N.; Pijanowski, Bryan C.; Potter, Kevin M. 2016. Corrigendum: A subcontinental view of forest plant invasions.
Potter, Kevin M.; Koch, Frank H.; Oswalt, Christopher M.; Iannone, Basil V. 2016. Data, data everywhere: detecting spatial patterns in fine-scale ecological information collected across a continent.
Iannone III, Basil V.; Potter, Kevin M.; Hamil, Kelly-Ann Dixon; Huang, Whitney; Zhang, Hao; Guo, Qinfeng; Oswalt, Christopher M.; Woodall, Christopher W.; Fei, Songlin. 2016. Evidence of biotic resistance to invasions in forests of the Eastern USA.
Oswalt, Christopher. 2016. Forests of Tennessee, 2013.
Schweitzer, Callie; Clatterbuck, W.K.; Oswalt, Christopher, eds. 2016. Proceedings of the 18th biennial southern silvicultural research conference.
Oswalt, Christopher M.; Oswalt, Sonja N.; Meade, Jason R. 2016. Species composition and succession in yellow pine stands following southern pine beetle outbreaks in Tennessee-preliminary results.
Oswalt, Christopher M.; Fei, Songlin; Guo, Qinfeng; Iannone III, Basil V.; Oswalt, Sonja N.; Pijanowski, Bryan C.; Potter, Kevin M. 2015. A subcontinental view of forest plant invasions.
Guo, Qinfeng; Fei, Songlin; Dukes, Jeffrey S.; Oswalt, Christopher M.; III, Basil V. Iannone; Potter, Kevin M. 2015. A unified approach for quantifying invasibility and degree of invasion.
Brandeis, Thomas; Oswalt, Christopher; Stringer, Jeffery; Zarnoch, Stan. 2015. Are observed trends in hardwood tree grade due to resource changes or data anomalies?.
Iannone III, Basil V.; Potter, Kevin M.; Guo, Qinfeng; Liebhold, Andrew M.; Pijanowski, Bryan C.; Oswalt, Christopher M.; Fei, Songlin. 2015. Biological invasion hotspots: a trait-based perspective reveals new sub-continental patterns.
Oswalt, C.M. 2015. Forests of Kentucky, 2012.
Oswalt, Christopher M.; Brandeis, Consuelo; Cooper, Jason A.; Oswalt, Sonja N.; Randolph, KaDonna C. 2015. Kentucky’s forests, 2009.
Iannone, Basil V.; Oswalt, Christopher M.; Liebhold, Andrew M.; Guo, Qinfeng; Potter, Kevin M.; Nunez-Mir, Gabriela C.; Oswalt, Sonja N.; Pijanowski, Bryan C.; Fei, Songlin; Bradley, Bethany. 2015. Region-specific patterns and drivers of macroscale forest plant invasions.
Fei, Songlin; Iannone III, Basil V.; Oswalt, Christopher M.; Guo, Qinfeng; Potter, Kevin M.; Oswalt, Sonja N.; Pijanowski, Bryan C.; Nunez-Mir, Gabriela C. 2015. Understanding macroscale invasion patterns and processes with FIA data.
Iannone, Basil V. III; Potter, Kevin M.; Zhang, Hao; Oswalt, Christopher M. Guo; Woodall, Christopher W.; Fei, Songlin. 2015. Using forest inventory and analysis data to understand biotic resistance to plant invasions across the Eastern United States.
Oswalt, Christopher M.; Ridley, Ted R. 2015. Utilizing online technology to increase the data reach of the forest inventory and analysis program; examples from the Southern United States.
Potter, Kevin M.; Woodall, Christopher W.; Oswalt, Christopher M.; Iannone, Basil V. III; Fei, Songlin. 2015. When does biodiversity matter? Assessing ecosystem services across broad regions using forest inventory and analysis data.
Reichert, Benjamin L.; Jean-Philippe, Sharon R.; Oswalt, Christopher; Franklin, Jennifer; Radosevich, Mark. 2015. Woody vegetation and soil characteristics of residential forest patches and open spaces along an urban-to-rural gradient.
Oswalt, Sonja N.; Oswalt, Christopher M. 2014. Invasive plants found in Georgia’s forests, 2010 - forest inventory and analysis factsheet.
Oswalt, Christopher M.; Oswalt, Sonja N. 2014. Invasive plants found in North Carolina’s forests, 2010—forest inventory and analysis factsheet.
Oswalt, Sonja N.; Oswalt, Christopher M. 2014. Invasive plants found in Oklahoma’s forests, 2010 - forest inventory and analysis factsheet.
Bentley, James W.; Brandeis, Consuelo; Cooper, Jason A.; Oswalt, Christopher M.; Oswalt, Sonja N.; Randolph, KaDonna. 2014. Texas' forests, 2008.
Woodall, Christopher W.; Domke, Grant M.; Riley, Karin L.; Oswalt, Christopher M.; Crocker, Susan J.; Yohe, Gary W. 2013. A framework for assessing global change risks to forest carbon stocks in the United States.
Woodall, C.W.; Zhu, K.; Westfall, J.A.; Oswalt, C.M.; D'Amato, A.W.; Walters, B.F.; Lintz, H.E. 2013. Assessing the stability of tree ranges and influence of disturbance in eastern US forests.
Domke, Grant M.; Oswalt, Christopher M.; Woodall, Christopher W.; Turner, Jeffery A. 2013. Estimation of merchantable bole volume and biomass above sawlog top in the National Forest inventory of the United States.
Oswalt, Christopher M.; Oswalt, Sonja N. 2013. Invasive plants found in Virginia forests, 2010 - forest inventory and analysis factsheet.
Oswalt, Christopher M. 2013. Kentucky, 2011-forest inventory and analysis factsheet.
Woodall, Christopher W.; Waddell, Karen L.; Oswalt, Christopher M.; Smith, James E. 2013. Standing dead tree resources in forests of the United States.
Randolph, KaDonna; Rose, Anita; Oswalt, Christopher; Brown, Mark. 2013. Status of black walnut (Juglans nigra L.) in the Eastern United States in light of the discovery of thousand cankers disease.
Oswalt, Christopher M. 2013. Tennessee, 2011-forest inventory and analysis factsheet.
McWilliams, William H.; Alerich, Carol L.; Bechtold, William A.; Hansen, Mark; Oswalt, Christopher M.; Thompson, Mike; Turner, Jeff. 2012. Algorithmic decision rules for estimating growth, removals, and mortality within a national-scale forest inventory (USA).
Oswalt, Christopher M.; Oswalt, Sonja N.; Woodall, Christopher W. 2012. An Assessment of Flowering Dogwood (Cornus florida L.) Decline in the Eastern United States.
Woodall, Chistopher W.; Domke, Grant M.; MacFarlane, David W.; Oswalt, Christopher M. 2012. Comparing field- and model-based standing dead tree carbon stock estimates across forests of the US.
Oswalt, Christopher M.; Cooper, Jason A.; Brockway, Dale G.; Brooks, Horace W.; Walker, Joan L.; Connor, Kristina F.; Oswalt, Sonja N.; Conner, Roger C. 2012. History and current condition of longleaf pine in the Southern United States.
Oswalt, Christopher M.; Oswalt, Sonja N. 2012. Invasive plants found in Alabama forests, 2009 forest inventory and analysis factsheet.
Oswalt, Christopher M.; Oswalt, Sonja N. 2012. Invasive plants found in Kentucky forests, 2009 forest inventory and analysis factsheet.
Oswalt, Sonja N.; Oswalt, Christopher M. 2012. Invasive plants found in Louisiana’s forests, 2009 forest inventory and analysis factsheet.
Oswalt, Christopher M.; Oswalt, Sonja N. 2012. Invasive plants found in South Carolina forests, 2010 forest inventory and analysis factsheet.
Oswalt, Christopher M. 2012. Kentucky, 2010—forest inventory and analysis factsheet.
Oswalt, Christopher M.; Hartsell, Andrew J. 2012. Long and short term changes in the forests of the Cumberland Plateau and Mountains using large scale forest inventory data.
Oswalt, Christopher M. 2012. Tennessee, 2010 forest inventory and analysis factsheet.
Oswalt, Christopher M.; Oswalt, Sonja N.; Johnson, Tony G.; Brandeis, Consuelo; Randolph, KaDonna C.; King, Christopher R. 2012. Tennessee’s forests, 2009.
Oswalt, Sonja N.; Oswalt, Christopher M. 2012. The national picture of nonnative plants in the United States according to FIA data.
Oswalt, Christopher M.; Oswalt, Sonja N.; Zimmerman, Lewis. 2012. Updating the southern nonnative plant watch list: the future of NNIP Monitoring in the south.
Nowak, David J.; Cumming, Anne B.; Twardus, Daniel; Hoehn, Robert E.; Oswalt, Christopher M.; Brandeis, Thomas J. 2012. Urban forests of Tennessee, 2009.
Oswalt, Christopher M.; Clatterbuck, Wayne K.; Larsen, Dave R. 2011. A technique for predicting clear-wood production in hardwood stems: A model for evaluating hardwood plantation development and management.
Oswalt, Christopher M.; Clatterbuck, Wayne K. 2011. Growing high quality hardwoods: Plantation trials of mixed hardwood species in Tennessee.
Oswalt, Sonja N.; Oswalt, Christopher M. 2011. Invasive plants found in Mississippi forests, 2009 forest inventory and analysis factsheet.
Oswalt, Sonja N.; Oswalt, Christopher M. 2011. Invasive plants found in Tennessee forests, 2009 forest inventory and analysis factsheet.
Oswalt, Sonja N.; Oswalt, Christopher M. 2011. Invasive plants found in east Texas forests, 2009 forest inventory and analysis factsheet.
Oswalt, Christopher M.; Conner, Roger C. 2011. Southern forest inventory and analysis volume equation user’s guide.
Oswalt, Sonja N.; Oswalt, Christopher M. 2011. The extent of selected nonnative invasive plants on southern forest lands.
Oswalt, Christopher M.; Oswalt, Sonja N.; Brandeis, Thomas J. 2010. Big trees in the southern forest inventory.
Oswalt, Christopher M.; Oswalt, Sonja N. 2010. Documentation of significant losses in Cornus florida L. populations throughout the Appalachian ecoregion.
Tan, Yuan; Fan, Joseph Z.; Oswalt, Christopher M. 2010. Impact of ecological and socioeconomic determinants on the spread of tallow tree in southern forest lands.
Oswalt, Christopher M.; King, Christopher R.; Johnson, Tony G. 2010. Kentucky, 2007 forest inventory and analysis factsheet.
Woodall, C.W.; Oswalt, C.M.; Westfall, J.A.; Perry, C.H.; Nelson, M.D.; Finley, A.O. 2010. Selecting tree species for testing climate change migration hypotheses using forest inventory data.
Oswalt, Christopher M.; Oswalt, Sonja N. 2010. The facilitation and impacts of Microstegium vimineum colonization in an eastern hardwood forest.
Oswalt, Sonja N.; Johnson, Tony G.; Coulston, John W.; Oswalt, Christopher M. 2009. Mississippi's forests, 2006.
Oswalt, Christopher M.; Turner, Jeffery A. 2009. Status of hardwood forest resources in the Appalachian region including estimates of growth and removals.
Oswalt, Christopher M.; Oswalt, Sonja N.; Johnson, Tony G.; Chamberlain, James L.; Randolph, KaDonna C.; Coulston, John W. 2009. Tennessee's Forests, 2004.
Woodall, Christopher W.; Oswalt, Christopher M.; Westfall, James A.; Perry, Charles H.; Nelson, Mark N. 2009. Tree migration detection through comparisons of historic and current forest inventories.
Oswalt, Sonja N.; Oswalt, Christopher; Turner, Jeffery. 2008. Hurricane Katrina impacts on Mississippi forests.
Turner, Jeffery A.; Oswalt, Christopher M.; Chamberlain, James L.; Conner, Roger C.; Johnson, Tony G.; Oswalt, Sonja N.; Randolph, KaDonna C. 2008. Kentucky's forests, 2004.
Oswalt, Sonja N.; Oswalt, Christopher M. 2008. Relationships between common forest metrics and realized impacts of Hurricane Katrina on forest resources in Mississippi.
Oswalt, Christopher M. 2008. Tennessee's forest land area was stable 1999-2005 but early successional forest area declined.
Oswalt, Christopher M.; Oswalt, Sonja N.; Clatterbuck, Wayne K. 2007. Effects of Microstegium vimineum (Trin.) A. Camus on native woody species density and diversity in a productive mixed-hardwood forest in Tennessee.
Sanders, Nathan J.; Weltzin, Jake F.; Crutsinger, Gregory M.; Fitzpatrick, Matthew C.; Nunez, Martin A.; Oswalt, Christopher M.; Lane, Kristin E. 2007. Insects mediate the effects of propagule supply and resource availability on a plant invasion.
Oswalt, Christopher M.; Clatterbuck, Wayne K.; Burkhardt, E.C. 2007. Predicting the cover-up of dead branches using a simple single regressor equation.
Oswalt, Christopher M.; Oswalt, Sonja N. 2007. Winter litter disturbance facilitates the spread of the nonnative invasive grass Microstegium vimineum (Trin.) A. Camus.
Oswalt, Christopher M.; Clatterbuck, Wayne K.; Houston, Allan E. 2006. Impacts of deer herbivory and visual grading on the early performance of high-quality oak planting stock in Tennessee, USA.
Oswalt, Christopher M.; Clatterbuck, Wayne K.; Houston, Allan E.; Schlarbaum, Scott E. 2006. Implications of large oak seedlings on problematic deer herbivory.
Oswalt, Christopher M.; Clatterbuck, Wayne K.; Scharbaum, Scott E.; Houston, Allan E. 2004. Growth and Development of Outplanted High-Quality Northern Red Oak Seedlings and the Effects of Competing Herbaceous Productions Within Four Overstory Treatments -- First-Year Results.

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