Susan Stevens Hummel
Portland Forestry Sciences Lab
Portland, OR 97205
Sensitivities of forest structure estimates to measurement methods and model parameters.
My research program aims to (1) use and evaluate different methods for estimating changes in forest vegetation associated with natural processes and harvest activities; (2) understand how different estimation methods can affect multi-scale evaluation and description of management effects on forest resources people care about; and (3) share information about the interactive effects of disturbances and management on forests in ways that enhance knowledge communication among the users and critics of science.
Remote sensing technologies (satellite, LIDAR) have the potential to improve how data about forest structure and composition are collected and used. One potential advantage, as evaluated in a study in central eastern Oregon, is that the cost of LIDAR data is not linearly related to area. For some metrics, like tree height and stand basal area, the LIDAR data provided estimates at a management planning scale that did not differ significantly from estimates derived from stand exams. This information is useful because it suggests that there are economies of scale yet to be realized by combining field work (intensive) with remote sensing (extensive) to inventory, monitor, and manage forest resources.
Why This Research is Important
My research helps both to refine the tools used in creating and evaluating the vegetation layers for landscape modeling and assessment and to make decisions about postfire regeneration.
- Oregon State University, Ph.D. Forest Resources, 1997
- University of Oregon, M.A. International Studies, 1988
- Georgetown University, B.A. Finance, 1984
Featured Publications & Products
- Hummel, Susan; Hudak, A. T.; Uebler, E. H.; Falkowski, M. J.; Megown, K. A. 2011. A comparison of accuracy and cost of LiDAR versus stand exam data for landscape management on the Malheur National Forest.
- Linton, J.M.; Barnes, H.M.; Seale, R.D.; Jones, P.D.; Lowell, E.; Hummel, S.S. 2010. Suitability of live and fire-killed small-diameter ponderosa and lodgepole pine trees for manufacturing a new structural wood composite.
- Hanewinkel, Marc; Hummel, Susan; Cullmann, Dominik. 2010. Modelling and economic evaluation of forest biome shifts under climate change in Southwest Germany.
- Hummel, Susan S. 2009. Branch and crown dimensions of Douglas-fir trees harvested from old-growth forests in Washington, Oregon, and California during the 1960s.
- Gärtner, S.; Reynolds, K.M.; Hessburg, P.F.; Hummel, S.S.; Twery, M. 2008. Decision support for evaluating landscape departure and prioritizing forest management activities in a changing environment.
Publications & Products
- Gagliasso, Donald; Hummel, Susan; Temesgen, Hailemariam. 2014. A comparison of selected parametric and non-parametric imputation methods for estimating forest biomass and basal area.
- Hummel, Susan; Meznarich, Paul. 2014. Back to the future: assessing accuracy and sensitivity of a forest growth model.
- Jones, Greg; Loeffler, Dan; Butler, Edward; Hummel, Susan; Chung, Woodam. 2013. The financial feasibility of delivering forest treatment residues to bioenergy facilities over a range of diesel fuel and delivered biomass prices.
- Hummel, Susan; Kennedy, Maureen; Steel, E. Ashley. 2012. Assessing forest vegetation and fire simulation model performance after the Cold Springs wildfire, Washington USA.
- Hummel, Susan; Foltz-Jordan, Sarah; Polasky, Sophia. 2012. Natural and cultural history of beargrass (Xerophyllum tenax).
- Hanewinkel, Marc; Hummel, Susan; Albrecht, Axel. 2011. Assessing natural hazards in forestry for risk management: a review.
- Hummel, Susan; Donovan, Geoffrey H.; Spies, Thomas A.; Hemstrom, Miles A. 2008. Conserving biodiversity using risk management: hoax or hope?.
- Calkin, David E.; Hummel, Susan Stevens; Agee, James K. 2005. Modeling trade-offs between fire threat reduction and late-seral forest structure..
- Monserud, Robert A.; Lowell, Eini C.; Becker, Dennis R.; Hummel, Susan Stevens; Donoghue, Ellen M.; Barbour, R. James; Kilborn, Kenneth A.; Nicholls, David L.; Roos, Joe; Cantrell, Randall A. 2004. Contemporary wood utilization research needs in the Western United States..
- Parker, Sharon; Hummel, Susan Stevens. 2002. Beyond 2001: a silvicultural odyssey to sustaining terrestrial and aquatic ecosystems? Proceedings of the 2001 national silviculture workshop, May 6-10, Hood River, Oregon..
- Hummel, Susan Stevens; Barbour, R. James; Hessburg, Paul F.; Lehmkuhl, John F. 2001. Ecological and financial assessment of late-successional reserve management..