Janet Ohmann, PhD

Treesearch Publications

• Robert Kennedy, Janet Ohmann, Matt Gregory, Heather Roberts, Zhiqiang Yang, David M. Bell, Van Kane, M Joseph Hughes, Warren B. Cohen, Scott Powell, Neeti Neeti, Tara Larrue, Sam Hooper, Jonathan Kane, David Miller, James Perkins, Justin Braaten, Rupert Seidl. 2018. An empirical, integrated forest biomass monitoring system
• Matthew J. Gregory, Zhiqiang Yang, David M. Bell, Warren B. Cohen, Sean P. Healey, Janet Ohmann, Heather M. Roberts. 2015. Cloud-based computation for accelerating vegetation mapping and change detection at regional to national scales
• David M. Bell, Matthew J. Gregory, Janet Ohmann. 2015. Imputed forest structure uncertainty varies across elevational and longitudinal gradients in the western Cascade mountains, Oregon, USA
• Raymond J. Davis, Janet Ohmann, Robert Kennedy, Warren B. Cohen, Matthew J. Gregory, Zhiqiang Yang, Heather M. Roberts, Andrew Gray, Thomas Spies. 2015. Northwest Forest Plan–the first 20 years (1994-2013): status and trends of late-successional and old-growth forests
• David M. Bell, Matthew J. Gregory, Heather M. Roberts, Raymond J. Davis, Janet Ohmann. 2015. How sampling and scale limit accuracy assessment of vegetation maps: A comment on Loehle et al. (2015)
• Harold S.J. Zald, Janet Ohmann, Heather M. Roberts, Matthew J. Gregory, Emilie B. Henderson, Robert McGaughey, Justin Braaten. 2014. Influence of lidar, Landsat imagery, disturbance history, plot location accuracy, and plot size on accuracy of imputation maps of forest composition and structure
• Emilie B. Henderson, Janet Ohmann, Matthew J. Gregory, Heather M. Roberts, Harold S.J. Zald. 2014. Species distribution modelling for plant communities: Stacked single species or multivariate modelling approaches?
• Andrew T. Hudak, A. Tod Haren, Nicholas L. Crookston, Robert J. Liebermann, Janet Ohmann. 2014. Imputing forest structure attributes from stand inventory and remotely sensed data in western Oregon, USA
• Janet Ohmann. 2013. Landscape context for density management: implications of land ownership and ecological gradients
• Janet Ohmann, Matthew J. Gregory, Heather M. Roberts, Warren B. Cohen, Robert Kennedy, Zhiqiang Yang. 2012. Mapping change of older forest with nearest-neighbor imputation and Landsat time-series
• Janet Ohmann, Warren Cohen, Paul Meznarich. 2011. Mapping older forests: satellites, statistics, and boots on the ground
• Melinda Moeur, Janet Ohmann, Robert Kennedy, Warren B. Cohen, Matthew J. Gregory, Zhiqiang Yang, Heather M. Roberts, Thomas Spies, Maria Fiorella. 2011. Northwest Forest Plan–the first 15 years (1994–2008): status and trends of late-successional and old-growth forests
• Janet Ohmann, Matthew J. Gregory, Emilie B. Henderson, Heather M. Roberts. 2011. Mapping gradients of community composition with nearest-neighbour imputation: extending plot data for landscape analysis
• Kenneth B. Jr. Pierce, C. Kenneth Brewer, Janet Ohmann. 2010. Moderate-resolution data and gradient nearest neighbor imputation for regional-national risk assessment
• Miles Hemstrom, James Merzenich, Theresa Burcsu, Janet Ohmann, Ryan Singleton. 2010. Integrating natural disturbances and management activities to examine risks and opportunities in the central Oregon landscape analysis
• Bruce G. Marcot, Janet Ohmann, Kim L. Mellen-McLean, Karen Waddell. 2010. Synthesis of regional wildlife and vegetation field studies to guide management of standing and down dead trees
• Emilie Grossmann, Janet Ohmann, James Kagan, Heather May, Matthew Gregory. 2010. Mapping ecological systems with a random forest model: tradeoffs between errors and bias
• Václavík Tomáš, Alan Kanaskie, Ellen Goheen, Janet Ohmann, Everett Hansen, Ross Meentemeyer. 2010. Mapping the risk of sudden oak death in Oregon: prioritizing locations for early detection and eradication
• Scott Powell, Warren B. Cohen, Sean P. Healey, Robert Kennedy, Gretchen Moisen, Ken Pierce, Janet Ohmann. 2010. Quantification of live aboveground forest biomass dynamics with Landsat time-series and field inventory data: A comparison of empirical modeling approaches
• Ken Pierce, Janet Ohmann, Michael C. Wimberly, Matthew J. Gregory, Jeremy S. Fried. 2009. Mapping wildland fuels and forest structure for land management: a comparison of nearest neighbor imputation and other methods
• James S. Kagan, Janet Ohmann, Matthew Gregory, Claudine Tobalske. 2008. Land cover map for map zones 8 and 9 developed from SAGEMAP, GNN, and SWReGAP: a pilot for NWGAP
• Etsuko Nonaka, Thomas A. Spies, Michael C. Wimberly, Janet Ohmann. 2007. Historical range of variability in live and dead wood biomass: a regional-scale simulation study
• Becky K. Kerns, Janet Ohmann. 2004. Evaluation and prediction of shrub cover in coastal Oregon forests (USA)
• Bruce G. Marcot, Grant Gunderson, Kim Mellen, Janet Ohmann. 2004. DecAID advisor: a tool for managing snags, down wood and wood decay in PNW forests.
• Kim Mellen, Bruce G. Marcot, Janet Ohmann, Karen Waddell, Susan A. Livingston, Elizabeth A. Willhite, Bruce B. Hostetler, Catherine Ogden, Tina Dreisbach. 2004. DecAID: the decayed wood advisor for managing snags, partially dead trees, and down wood for biodiversity in the forests of Washington and Oregon.
• Michael C. Wimberly, Janet Ohmann. 2004. A multi-scale assessment of human and environmental constraints on forest land cover change on the Oregon (USA) coast range.
• Janet Ohmann. 2003. New forest vegetation maps facilitate assessment of biodiversity indicators over large, multi-ownership regions.
• Janet Ohmann, Matthew J. Gregory. 2002. Predictive mapping of forest composition and structure with direct gradient analysis and nearest neighbor imputation in coastal Oregon, U.S.A.
• Janet Ohmann, Karen Waddell. 2002. Regional patterns of dead wood in forested habitats of Oregon and Washington.
• Kim Mellen, Bruce G. Marcot, Janet Ohmann, Karen Waddell, Elizabeth A. Willhite, Bruce B. Hostetler, Susan A. Livingston, Cay Ogden. 2002. DecAID: a decaying wood advisory model for Oregon and Washington.
• Janet Ohmann, William C. McComb, Abdel Azim Zumrawi. 1994. Snag abundance for primary cavity-nesting birds on nonfederal forest lands in Oregon and Washington.
• Janet Ohmann. 1992. Wildlife habitats of the north coast of California: new techniques for extensive forest inventory.
• Colin D. MacLean, Janet Ohmann, Patricia M. Bassett. 1991. Preliminary timber resource statistics for the Puget Sound area, Washington.
• Colin D. MacLean, Janet Ohmann, Patricia M. Bassett. 1991. Preliminary timber resource statistics for southwest Washington.
• Colin D. MacLean, Janet Ohmann, Patricia M. Bassett. 1991. Preliminary timber resource statistics for the Olympic Peninsula, Washington.
• Susan N. Little, Roger D. Ottmar, Janet Ohmann. 1986. Predicting duff consumption from prescribed burns on conifer clearcuts in western Oregon and western Washington.
• Janet Ohmann. 1984. Port-Orford-Cedar (Chamaecyparis lawsoniana (A. Murr.) Parl.)

• Oregon State University, Forest Science Department, Ph.D., Forest Ecology, 1996
• Duke University School of Forestry and Environmental Studies, M.F., Forest Ecology, 1980
• Duke University, A.B., Botany, 1979