Martin Ritchie

Current Research

• Blacks Mountain Interdisciplinary Research Project
• CONIFERS; Young Stand Simulator for the Klamath Province
• Storrie Fire Restoration
• Effects of salvage harvesting
• OP-Yield Version 1.00 user's guide and Op-Yield Microsoft Excel™ spreadsheet v1.00.4 (5.8 MB)
• Standview: an R-package for rendering stand density management diagrams
  The standview package is an R-package for rendering a high-resolution-graphic stand density management diagram (DMD). A DMD is a visual aid used by foresters to evaluate stands based on stem density (number of trees per unit area) and either a mean tree size such as quadratic mean diameter, or basal area per unit area. This package was developed to provide flexible development of DMDs for forestry applications. It requires the user to specify the published equations, or to generate their own based on user-supplied metrics.

Research Interests

• Growth and yield of mixed-conifer forests, with emphasis on dynamics of young plantations.
• Interdisciplinary research to quantify the effects of resource management activities (timber harvest, cattle grazing, and prescribed fire) on an array of forest components such as wildlife, sustainable productivity, and biodiversity in interior pine forests.
• Methods of accelerating development of late successional forest vegetation.
• LiDAR applications in forestry.

Education

• Oregon State University, Ph.D. Forest Modeling 1992
• Oregon State University, M.S. Statistics 1990
• Oregon State University, M.S. Forest Management 1985
• Humboldt State University, B.S. Forest Management 1981

Professional Organizations

• American Statistical Association, Member
• Society of American Foresters (SAF), Member

Featured Publications & Products

• Ritchie, Martin W.; Zhang, Jianwei. 2018. OP-Yield Version 1.00 user's guide.

Publications

• Wing, Brian ; Boston, Kevin ; Ritchie, Martin W. 2019. A technique for implementing group selection treatments with multiple objectives using an airborne lidar-derived stem map in a heuristic environment.
• Mauro, Francisco ; Ritchie, Martin ; Wing, Brian ; Frank, Bryce ; Monleon, Vicente ; Temesgen, Hailemariam ; Hudak, Andrew . 2019. Estimation of changes of forest structural attributes at three different spatial aggregation levels in Northern California using multitemporal LiDAR.
• Zhang, Jianwei ; Finley, Kaelyn ; Johnson, Nels ; Ritchie, Martin W. 2019. Lowering stand density enhances resiliency of ponderosa pine forests to disturbances and climate change.
• Huff, Steve ; Poudel, Krishna P.; Ritchie, Martin ; Temesgen, H. . 2018. Quantifying aboveground biomass for common shrubs in northeastern California using nonlinear mixed effect models.
• Huff, Steve; Ritchie, Martin; Temesgen, H. 2017. Allometric equations for estimating aboveground biomass for common shrubs in northeastern California.
• Hammett, Ethan J.; Ritchie, Martin W.; Berrill, John-Pascal. 2017. Resilience of California black oak experiencing frequent fire: regeneration following two large wildfires 12 years apart.
• Ritchie, Martin W. 2016. Multi-scale reference conditions in an interior pine-dominated landscape in northeastern California.
• Knapp, Eric E.; Ritchie, Martin W. 2016. Response of understory vegetation to salvage logging following a high-severity wildfire.
• Crotteau, Justin S.; Ritchie, Martin W.; Varner, J. Morgan; Berrill, John-Pascal. 2015. Quercus kelloggii (Newb.) sprout response to fire severity in northern California.
• Wing, Brian M.; Ritchie, Martin W.; Boston, Kevin; Cohen, Warren B.; Olsen, Michael J. 2015. Individual snag detection using neighborhood attribute filtered airborne lidar data.
• Crotteau, Justin S.; Ritchie, Martin W.; Varner, J. Morgan. 2014. A Mixed-Effects Heterogeneous Negative Binomial Model for Postfire Conifer Regeneration in Northeastern California, USA.
• Ritchie, Martin W.; Knapp, Eric E. 2014. Establishment of a long-term fire salvage study in an interior ponderosa pine forest.
• Ritchie, Martin; Skinner, Carl. 2014. Interdisciplinary research on the Blacks Mountain Experimental Forest..
• Crotteau, Justin S.; Ritchie, Martin W. 2014. Long-term stand growth of interior ponderosa pine stands in response to structural modifications and burning treatments in northeastern California.
• Ritchie, Martin W.; Zhang, Jianwei; Hamilton, Todd A. 2013. Aboveground tree biomass for Pinus ponderosa in northeastern California.
• Zhang, Jianwei; Oliver, William W.; Ritchie, Martin W.; Neal, Donald L. 2013. Overstory and understory dynamics in a ponderosa pine plantation vary with stand density in the Sierra Nevada: 40-year results.
• Ritchie, Martin W.; Knapp, Eric E.; Skinner, Carl N. 2013. Snag longevity and surface fuel accumulation following post-fire logging in a ponderosa pine dominated forest.
• Zhang, Jianwei; Ritchie, Martin W.; Maguire, Douglas A.; Oliver, William W. 2013. Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity.
• Ritchie, Martin; Zhang, Jianwei; Hamilton, Todd. 2012. Effects of stand density on top height estimation for ponderosa pine.
• Crotteau, Justin; Varner, Morgan; Ritchie, Martin. 2012. Post-fire regeneration across a fire severity gradient in the southern Cascades.
• Wing, Brian M.; Ritchie, Martin W.; Boston, Kevin; Cohen, Warren B.; Gitelman, Alix; Olsen, Michael J. 2012. Prediction of understory vegetation cover with airborne lidar in an interior ponderosa pine forest.
• Vaughn, Nicholas R.; Turnblom, Eric C.; Ritchie, Martin W. 2010. Bootstrap evaluation of a young Douglas-fir height growth model for the Pacific Northwest.
• Wells, Gail; Hayes, Deborah; Krause, Katrina; Bartuska, Ann; LeVan-Green, Susan; Anderson, Jim; Gough, Tivoli; Adams, Mary; Schuler, Thomas; Kolka, Randy; Sebestyen, Steve; Kenefic, Laura; Brissette, John; Stout, Susan; Kanoti, Keith; Swanson, Fred; Greene, Sarah; Herring, Margaret; Ritchie, Martin; Skinner, Carl; Lisle, Tom; Keppeler, Elizabeth; Reid, Leslie; Wohlegemuth, Peter; Kitchen, Stanley; McCaughey, Ward; Guldin, Jim; Bragg, Don; Shelton, Michael; Loftis, David; Greenberg, Cathryn; Murphy, Julia. 2009. Experimental forests and ranges : 100 years of research success stories.
• Rabin, Lawrence A.; Oliver, William W.; Powers, Robert F.; Ritchie, Martin W.; Busse, Matt D.; Knapp, Eric E. 2009. Historical growth plots in the Pacific Southwest.
• McDonald, Philip M.; Fiddler, Gary; Ritchie, Martin; Anderson, Paula. 2009. Naturally seeded versus planted ponderosa pine seedlings in group-selection openings.
• Zhang, Jianwei; Ritchie, Martin W. 2008. Restoring eastside ponderosa pine ecosystems at the Blacks Mountain Experimental Forest: a case study.
• Ritchie, Martin W.; Wing, Brian M.; Hamilton, Todd A. 2008. Stability of the large tree component in treated and untreated late-seral interior ponderosa pine stands.
• Zhang, Jianwei; Ritchie, Martin W.; Oliver, William W. 2008. Vegetation response to stand structure and prescribed fire in an interior ponderosa pine ecosystem.
• Zhang, Jianwei; Oliver, William W.; Ritchie, Martin W. 2007. Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA.
• Ritchie, Martin W.; Skinner, Carl N.; Hamilton, Todd A. 2007. Probability of wildfire-induced tree mortality in an interior pine forest of northern California: effects of thinning and prescribed fire.
• Maleki, Sussanne; Featured: Skinner, Carl; Ritchie, Martin. 2007. Tested by fire: the cone fire and the lessons of an accidental experiment.
• Ritchie, Martin W.; Harcksen, Kathleen A. 2005. Accelerating development of late-successional features in second-growth pine stands of the Goosenest Adaptive Management Area.
• Ritchie, Martin W. 2005. Ecological research at the Goosenest Adaptive Management Area in northeastern California.
• Vaughn, Nicholas; Ritchie, Martin W. 2005. Estimation of crown cover in interior ponderosa pine stands: Effects of thinning and prescribed fire.
• Ritchie, Martin W.; Maguire, Douglas A.; Youngblood, Andrew. 2005. Proceedings of the Symposium on Ponderosa Pine: Issues, Trends, and Management, 2004 October 18-21, Klamath Falls, OR.
• Ritchie, Martin W. 1999. A compendium of forest growth and yield simulators for the Pacific coast states.
• Uzoh, Fabian C.C.; Ritchie, Martin W. 1996. Crown area equations for 13 species of trees and shrubs in northern California and southwestern Oregon.
• McDonald, Philip M.; Ritchie, Martin W.; Abbott, Celeste S. 1996. Ten-year diameter and basal area growth of trees surrounding small group selection openings.
• McDonald, Philip M.; Ritchie, Martin W. 1994. Epicormic branching of California black oak: effect of stand and tree characteristics.
• Ritchie, Martin W.; Powers, Robert F. 1993. User's guide for SYSTUM-1 (Version 2.0): A simulator of growth trends in young stands under management in California and Oregon.

Citations of non US Forest Service Publications

• Op-Yield Microsoft Excel™ spreadsheet v1.00.4 (5.8 MB)

• Standview: an R-package for rendering stand density management diagrams

  The standview package is an R-package for rendering a high-resolution-graphic stand density management diagram (DMD). A DMD is a visual aid used by foresters to evaluate stands based on stem density (number of trees per unit area) and either a mean tree size such as quadratic mean diameter, or basal area per unit area. This package was developed to provide flexible development of DMDs for forestry applications. It requires the user to specify the published equations, or to generate their own based on user-supplied metrics.