Martin Ritchie
Redding, CA 96002-9241
United States
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 Interest
- 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
- Member, American Statistical Association, Current
- Member, Society of American Foresters (SAF), Current
Featured Publications
- Martin W. Ritchie, Jianwei Zhang. 2018. OP-Yield Version 1.00 user's guide
- Martin W. Ritchie. 2020. Relating stocking and density for natural regeneration of conifers in northern California
- Martin Ritchie, Jianwei Zhang, Ethan Hammett. 2019. Aboveground biomass response to release treatments in a young ponderosa pine plantation
- Martin W. Ritchie. 2016. Multi-scale reference conditions in an interior pine-dominated landscape in northeastern California
Other Publications
- Emily Brodie, Eric E. Knapp, Wesley R. Brooks, Stacy A. Drury, Martin W. Ritchie. 2024. Forest thinning and prescribed burning treatments reduce wildfire severity and buffer the impacts of severe fire weather
- Sushil Nepal, Bianca N. I Eskelson, Martin W. Ritchie, Sarah E. Gergel. 2023. Thinning combined with prescribed burn created spatially heterogeneous overstory structures in contemporary dry forests: A comparison using LiDAR (2016) and field inventory (1934) data
- Sushil Nepal, Bianca N.I. Eskelson, Martin W. Ritchie, Sarah E. Gergel. 2023. Spatial patterns of vigor by stand density across species groups and its drivers in a pre-harvest ponderosa pine-dominated landscape in northern California
- Martin Ritchie, John-Pascal Berrill, Ethan Hammett, Jonathan W. Long. 2023. Early responses to crown modification of California black oak sprouts initiated by high-severity wildfire
- Cerena J. Brewen, John-Pascal Berrill, Martin W. Ritchie, Kevin Boston, Christa M. Dagley, Bobette Jones, Michelle Coppoletta, Coye L. Burnett. 2021. 76-year decline and recovery of aspen mediated by contrasting fire regimes: Long-unburned, infrequent and frequent mixed-severity wildfire
- Woongsoon Jang, Martin Ritchie, Jianwei Zhang. 2020. Improved equations for the density management diagram isolines of ponderosa pine stands
- Martin W. Ritchie. 2020. Effects of thinning and prescribed fire in the Goosenest Adaptive Management Area in northeastern California
- Sushil Nepal, Bianca N.I. Eskelson, Martin W. Ritchie. 2020. Difference in regeneration conditions in Pinus ponderosa dominated forests in northern California, USA, over an 83 year period
- Brian Wing, Kevin Boston, Martin W. Ritchie. 2019. A technique for implementing group selection treatments with multiple objectives using an airborne lidar-derived stem map in a heuristic environment
- Francisco Mauro, Martin Ritchie, Brian Wing, Bryce Frank, Vicente Monleon, Hailemariam Temesgen, Andrew Hudak. 2019. Estimation of changes of forest structural attributes at three different spatial aggregation levels in Northern California using multitemporal LiDAR
- Jianwei Zhang, Kaelyn Finley, Nels Johnson, Martin W. Ritchie. 2019. Lowering stand density enhances resiliency of ponderosa pine forests to disturbances and climate change
- Steve Huff, Krishna P. Poudel, Martin Ritchie, H. Temesgen. 2018. Quantifying aboveground biomass for common shrubs in northeastern California using nonlinear mixed effect models
- Ethan J. Hammett, Martin W. Ritchie, John-Pascal Berrill. 2017. Resilience of California black oak experiencing frequent fire: regeneration following two large wildfires 12 years apart
- Steve Huff, Martin Ritchie, H. Temesgen. 2017. Allometric equations for estimating aboveground biomass for common shrubs in northeastern California
- Eric E. Knapp, Martin W. Ritchie. 2016. Response of understory vegetation to salvage logging following a high-severity wildfire
- Brian M. Wing, Martin W. Ritchie, Kevin Boston, Warren B. Cohen, Michael J. Olsen. 2015. Individual snag detection using neighborhood attribute filtered airborne lidar data
- Justin S. Crotteau, Martin W. Ritchie, J. Morgan Varner, John-Pascal Berrill. 2015. Quercus kelloggii (Newb.) sprout response to fire severity in northern California
- Justin S. Crotteau, Martin W. Ritchie, J. Morgan Varner. 2014. A Mixed-Effects Heterogeneous Negative Binomial Model for Postfire Conifer Regeneration in Northeastern California, USA
- Martin Ritchie, Carl Skinner. 2014. Interdisciplinary research on the Blacks Mountain Experimental Forest.
- Martin W. Ritchie, Eric E. Knapp. 2014. Establishment of a long-term fire salvage study in an interior ponderosa pine forest
- Justin S. Crotteau, Martin W. Ritchie. 2014. Long-term stand growth of interior ponderosa pine stands in response to structural modifications and burning treatments in northeastern California
- Martin W. Ritchie, Eric E. Knapp, Carl N. Skinner. 2013. Snag longevity and surface fuel accumulation following post-fire logging in a ponderosa pine dominated forest
- Martin W. Ritchie, Jianwei Zhang, Todd A. Hamilton. 2013. Aboveground tree biomass for Pinus ponderosa in northeastern California
- Jianwei Zhang, William W. Oliver, Martin W. Ritchie, Donald L. Neal. 2013. Overstory and understory dynamics in a ponderosa pine plantation vary with stand density in the Sierra Nevada: 40-year results
- Jianwei Zhang, Martin W. Ritchie, Douglas A. Maguire, William W. Oliver. 2013. Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity
- Martin Ritchie, Jianwei Zhang, Todd Hamilton. 2012. Effects of stand density on top height estimation for ponderosa pine
- Brian M. Wing, Martin W. Ritchie, Kevin Boston, Warren B. Cohen, Alix Gitelman, Michael J. Olsen. 2012. Prediction of understory vegetation cover with airborne lidar in an interior ponderosa pine forest
- Justin Crotteau, Morgan Varner, Martin Ritchie. 2012. Post-fire regeneration across a fire severity gradient in the southern Cascades
- Nicholas R. Vaughn, Eric C. Turnblom, Martin W. Ritchie. 2010. Bootstrap evaluation of a young Douglas-fir height growth model for the Pacific Northwest
- Lawrence A. Rabin, William W. Oliver, Robert F. Powers, Martin W. Ritchie, Matt D. Busse, Eric E. Knapp. 2009. Historical growth plots in the Pacific Southwest
- Gail Wells, Deborah Hayes, Katrina Krause, Ann Bartuska, Susan LeVan-Green, Jim Anderson, Tivoli Gough, Mary Adams, Thomas Schuler, Randy Kolka, Steve Sebestyen, Laura Kenefic, John Brissette, Susan Stout, Keith Kanoti, Fred Swanson, Sarah Greene, Margaret Herring, Martin Ritchie, Carl Skinner, Tom Lisle, Elizabeth Keppeler, Leslie Reid, Peter Wohlegemuth, Stanley Kitchen, Ward McCaughey, Jim Guldin, Don Bragg, Michael Shelton, David Loftis, Cathryn Greenberg, Julia Murphy. 2009. Experimental forests and ranges : 100 years of research success stories
- Philip M. McDonald, Gary Fiddler, Martin Ritchie, Paula Anderson. 2009. Naturally seeded versus planted ponderosa pine seedlings in group-selection openings
- Martin W. Ritchie, Brian M. Wing, Todd A. Hamilton. 2008. Stability of the large tree component in treated and untreated late-seral interior ponderosa pine stands
- Jianwei Zhang, Martin W. Ritchie, William W. Oliver. 2008. Vegetation response to stand structure and prescribed fire in an interior ponderosa pine ecosystem
- Jianwei Zhang, Martin W. Ritchie. 2008. Restoring eastside ponderosa pine ecosystems at the Blacks Mountain Experimental Forest: a case study
- Sussanne Maleki, Carl Featured: Skinner, Martin Ritchie. 2007. Tested by fire: the cone fire and the lessons of an accidental experiment
- Martin W. Ritchie, Carl N. Skinner, Todd A. Hamilton. 2007. Probability of wildfire-induced tree mortality in an interior pine forest of northern California: effects of thinning and prescribed fire
- Jianwei Zhang, William W. Oliver, Martin W. Ritchie. 2007. Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA
- Nicholas Vaughn, Martin W. Ritchie. 2005. Estimation of crown cover in interior ponderosa pine stands: Effects of thinning and prescribed fire
- Martin W. Ritchie, Douglas A. Maguire, Andrew Youngblood. 2005. Proceedings of the Symposium on Ponderosa Pine: Issues, Trends, and Management, 2004 October 18-21, Klamath Falls, OR
- Martin W. Ritchie, Kathleen A. Harcksen. 2005. Accelerating development of late-successional features in second-growth pine stands of the Goosenest Adaptive Management Area
- Martin W. Ritchie. 2005. Ecological research at the Goosenest Adaptive Management Area in northeastern California
- Martin W. Ritchie. 1999. A compendium of forest growth and yield simulators for the Pacific coast states
- Fabian C.C. Uzoh, Martin W. Ritchie. 1996. Crown area equations for 13 species of trees and shrubs in northern California and southwestern Oregon
- Philip M. McDonald, Martin W. Ritchie, Celeste S. Abbott. 1996. Ten-year diameter and basal area growth of trees surrounding small group selection openings
- Philip M. McDonald, Martin W. Ritchie. 1994. Epicormic branching of California black oak: effect of stand and tree characteristics
- Martin W. Ritchie, Robert F. Powers. 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-Forest Service Publications
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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.