301 Hardwood Lane, Suite B
Contact John Brown
Forest Biometrics, Silviculture, Forest Disturbance.
Why This Research is Important
Tree survival is a common inventory measure that is collected for multiple long term data sets related to forest management strategies and disturbance. Analysis however has been limited in the past to logistic regression modeling or other more basic measures of mortality such as percentages over time. A variety of research topics have been presented where mortality of the overstory trees is studied in a limited fashion, such as shelterwood-burns, invasive species such as emerald ash borer, and deferment cutting
Studies of the effect of forest management on tree grade exist but were limited in the past by a lack of statistical program capability and a need for advancements in the theory of generalized linear mixed models. With newer tools available, a more rigourous approach can be implemented to analyzing the effect of forest management on tree grade. This allows for better estimation of hardwood yields across the region.
Growth and yield modeling is an important tool for consultants, land managers, and software developers with models needing to be developed for Appalachian forests. In some cases, there are no available models for particular species (for example Tilia americana or Fagus grandifolia), while for others an important input, site index, is not representative of the region. . Appalachian hardwoods are critical to sustaining the hardwood forest products industry which supports many rural communities in the region, while the latter is an endangered ecosystem in need of restoration. Beyond the issue of unavailable and unsuitable growth and yield models, changes in forest management practices and changing climate are also factors influencing the need for new models.
- Virginia Polytechnic Institute and State University , Doctor Of Philosophy Forestry and Forest Products (Forest Biometrics) 2009
- Richard Stockton College of New Jersey, B.S. Environmental Science 1994
- Research Forester, USDA Forest Service
2010 - Current
- Mathematical Statistician, USDA Forest Service
2000 - 2009
Featured Publications & Products
- Schuler, Thomas M.; Thomas-Van Gundy, Melissa; Brown, John P.; Wiedenbeck, Jan. 2017. Managing Appalachian hardwood stands using four management practices: 60-year results.
- Wiedenbeck, Janice K.; Brown, John P.; Schuler, Thomas M.; Thomas-Van Gundy, Melissa. 2017. Tree-quality impacts associated with use of the shelterwood-fire technique in a central Appalachian forest.
- Brown, John P. 2015. Spatial Allocation of Timber Product Output Roundwood Receipts.
- Brown, John P.; Oderwald, Richard G. 2012. Sampling estimators of total mill receipts for use in timber product output studies.
- Knight, Kathleen S.; Brown, John P.; Long, Robert P. 2013. Factors affecting the survival of ash (Fraxinus spp.) trees infested by emerald ash borer (Agrilus planipennis).
- Brown, John; Wiedenbeck, Janice K.; Gazo, Rado; Yaussy, Daniel A. 2004. Silvicultural Treatment Effects on Hardwood Tree Quality on the Vinton Furnace Experimental Forest.
- Brown, John P. 2019. Heartwood taper in northern red oak (Quercus rubra L.).
- Brown, John P.; Thomas-Van Gundy, Melissa A.; Schuler, Thomas M. 2018. Overstory cohort survival in an Appalachian hardwood deferment cutting: 35-year results.
- Brown, John P.; Thomas-Van Gundy, Melissa A.; Schuler, Thomas M.; Wiedenbeck, Janice K. 2018. Silvicultural Prescriptions Influence the Proportion of High-Quality Hardwood Butt Logs Harvested over a Half-Century of Management.
- Brown, John P.; Westfall, James A. 2012. An evaluation of the properties of the variance estimator used by FIA.
- Brown, John; Lister, Andrew J.; Fajvan, Mary Ann; Ruefenacht, Bonnie; Mazzarella, Christine. 2012. Modeling forest ecosystem changes resulting from surface coal mining in West Virginia.
- Brown, John P.; Sendak, Paul E. 2006. Association of ring shake in eastern hemlock with tree attributes.
- Brown, John; Miller, Gary W.; Gottschalk, Kurt W. 2004. Effects of Alternative Thinning Treatments on Tree Grades at Three Upland Hardwood Sites in Kentucky and Ohio: 30 Year Results.
- Wiedenbeck, Jan; Brown, John; Bennett, Neal. 2003. Crook and overlength in hardwood lumber:results from a 14-mill survey.
|Forest management demonstration area highlights working forest|
New research published in 2017 describes the results of a 60-year forest management demonstration area on the Fernow Experimental Forest and the ...
|Silvicultural Prescriptions Affect Hardwood Tree Quality Over Five Decades of Management|
Analysis of 50-year records of harvests on the Fernow Experimental Forest in west Virginia by Forest Service scientists demonstrates that diamet ...
|Study reveals how to minimize overstory mortality when using shelterwood-burn techniques to restore oak forests|
Hardwood forests, and especially oak forests, in the eastern U.S. often require fire to create forest conditions suitable for successful stand r ...
|Sustaining Tree Quality Under Three Harvesting Methods|
The quality of trees grown and harvested under various methods exhibits changing patterns over time. A Forest Service scientist studied three me ...