Research Interests:
Forest biometrics and measurements
Current Programs:
Developing methods for estimating/updating status, change, and
trends; modeling impacts of silvicultural systems and spatial
heterogeneity; modeling tree crown attributes and windthrow risk;
and developing imputation and sampling techniques to assess,
monitor, and analyze forest resources.
Graduate Students: Timothy
Drake (MS); Bianca
Eskelson (PhD); Donald Gagliasso (MS); Michael
Goerndt (PhD); Theresa
Marquardt (MS)
Research Associate: Greg Latta (MS)
Courses:
FOR 321, Forest Mensuration (5)
FOR 524, Forest Biometrics (3)
Selected Publications:
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Eskelson, B.N.I, H. Temesgen, and T. Barrett. (in press) Estimating
current forest attributes from paneled inventory data using plot-level
imputation: a study from the Pacific Northwest. Forest Science.
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Weiskittel, A. R., P.J. Gould, and H. Temesgen. (in press) Sources of
variation in the self-thinning boundary line for three ecologically-distinct
species. Forest Science.
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Younger, N., H. Temesgen, and S. Garber. 2008. Taper and volume responses to
sulfur treatment in coastal Oregon Douglas fir stands. West. J. Appl. For.
23(3): 142-148.
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Temesgen, H., T. Barrett, and G. Latta. 2008. Estimating Cavity Tree
Abundance Using Nearest Neighbor Imputation Methods for western Oregon and
Washington Forests. Silva Fennica. 42(3): 337-354.
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Eskelson, B.N.I, H. Temesgen, and T.M. Barrett. 2008.
Comparison of Stratified and Non-stratified Most Similar Neighbour
Approaches for Estimating Stand Tables. Forestry: Int. J. For. Res. 81:
125-134.
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Temesgen, H., V.J. Monleon, and D.W. Hann. 2008. Analysis of nonlinear
tree height prediction strategies for Douglas-fir Forests. Can. J. For. Res.
38: 553-565
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Weiskittel, A.R, H. Temesgen, D.S. Wilson, and D. A. Maguire. 2008.
Sources of within- and between-stand variability in specific leaf area of
three ecologically distinct conifer species. Annals of Forest Sciences
65, 103-113.
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Temesgen, H., M.E. Goerndt, G. P. Johnson, D.M. Adams, and R.A. Monserud. 2007.
Forest measurement and biometrics in forest management: status
and future needs of the Pacific Northwest USA. Journal
of Forestry. 105: 233-238.
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Temesgen, H., D.W. Hann, and V.J. Monleon. 2007. Regional height-diameter equations for major tree species of southwest Oregon.
West. J. Appl. For. 22(3): 213-219.
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Temesgen, H, P.J. Martin, D.A. Maguire, J.C. Tappeiner. 2006.
Quantifying effects of different levels of dispersed canopy tree retention
on stocking and yield of the regeneration cohort. For. Ecol. & Manage.
235: 44-53.
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Temesgen, H. and A.R. Weiskittel. 2006. Leaf mass per area
relationships across light gradients in hybrid spruce crowns. Trees:
Structure & Function. 20: 522-530.
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Temesgen, H., T. Barrett, and G. Latta. 2005. Cavity Tree Abundance
and Stand Characteristics in Western Oregon Forests: Relationships and
predictions. International Forestry Review 7(5): 35.
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Temesgen, H. and S.J. Mitchell. 2005. An individual tree mortality model for
South-eastern British Columbia. West. J. Appl. For. 20(2): 101-109.
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LeMay, V. and H. Temesgen. 2005. Connecting inventory information
sources for landscape level analyses. J. Forest Biometry, Modeling and
Information Sciences.1: 37-49.
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LeMay, V. and Temesgen, H. 2005. Comparison of
nearest neighbor methods for estimating basal area and stems per ha using
aerial auxiliary variables. For. Sci 51 (2): 109-119.
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Temesgen, H., V.M. LeMay, and S. J. Mitchell. 2005. Tree crown ratio
models for multi-species and multi-layered stands. For. Chron. 81(1):
133-141.
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Céline Boisvenue.
H. Temesgen, and P.L. Marshall.
2004. Selecting a small tree height growth model for mixed-species
stands in the Southern Interior of British Columbia, Canada. For. Ecol. & Manage. 177: 301-312.
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Temesgen, H. and K. v. Gadow. 2004. Generalized height-diameter
models for major tree species in complex stands of interior British Columbia,
Canada. Europ. J. For. Res. 123(1): 45-51.
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Badre, T. H., P.L. Marshall, V.M. LeMay, Temesgen,
H.,
and Zumrawi. 2004. Regeneration imputation models for complex stands of southeastern
British Columbia. For. Chron. 80(2): 271-278.
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Temesgen, H., V. LeMay, and I.R. Cameron. 2003. Bivariate distribution functions
for predicting twig leaf area within hybrid spruce crowns. Can. J. For. Res.
33: 2044-2051.
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Temesgen, H. 2003. Estimating tree-lists from aerial information: a comparison
of a parametric and most similar neighbor approaches. Scand. J. For. Res.
18:279-288.
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Temesgen, H. 2003. Evaluation of sampling alternatives to quantify tree
leaf area. Can. J. For. Res. 33: 82-95.
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Temesgen, H., V.M. LeMay, P.L. Marshall,
and K. Froese. 2003. Imputing tree-lists from aerial attributes for complex
stands of British Columbia. For. Ecol. & Manage. 177: 277-285
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Temesgen, H. 2003. Distance sampling for estimating size and density of
wildlife trees in dispersed shelterwood system: A numerical example. Report
submitted to Riverside Forest Products Ltd. 10 pp.
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Rowan, C.A., S.J. Mitchell and H. Temesgen. 2002. Effectiveness of wind
firming treatments in Coastal British Columbia. Forestry. 76: 55-65.
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Mitchell, S.J., H. Temesgen and Y.P. Kulis.
2001. Empirical modelling of cutblock edge windthrow risk on Vancouver
Island, Canada, using stand level
information. For. Ecol. & Manage. 154: 117-130.
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Temesgen, H. 2000. Analysis of permanent sample plot data for differences
in geographic locations and climatic amplitudes within selected zones. Internal
report for the BC Ministry of Forests, Resources Inventory Branch. Victoria,
BC. 12 pp.
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Howard, A.F. and H. Temesgen. 1997. Potential financial returns from alternative silvicultural prescriptions in second-growth stands of coastal British Columbia.
Can. J. For. Res. 27:1483-1495.
Selected Presentations:
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Latta, G., Temesgen, H., D.M. Adams, and Tara Barrett. 2008. Potential
forest productivity impacts of climate change on forests of the United
States Pacific Northwest. Conference on "Adaptation of Forests and Forest
Management to Climate Change with Emphasis on Forest Health – Review of
Science, Policies, and Practices” August 25-28, Umeå, Sweden.
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Temesgen, H., A. R. Weiskittel and D.S. Wilson. 2008. Efficiency of some
sampling alternatives to estimate tree- and stand-level foliage biomass.
Presented at the 19th Annual TIES Conference at The University of British
Columbia Okanagan, June 8-13, Kelowna, BC, Canada.
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Eskelson, B.N.I, H. Temesgen, and T. Barrett. 2008. Estimating status of
forest attributes from paneled inventory data using nearest neighbor
imputation approaches. Presented at the 19th Annual TIES Conference at The
University of British Columbia Okanagan, June 8-13, Kelowna, BC, Canada.
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Latta, G., Temesgen, H., and Tara Barrett. 2008. Mapping and imputing
potential productivity of Pacific Northwest Forests. Presented at the
quarterly “Growth Model User’s Group” Meeting. Feb. 11, Vancouver,
Washington, USA
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Temesgen, H., A.R. Weiskittel, D.S. Wilson, and D.A. Maguire. 2007. Analysis
of within- and between-crown variability for mechanistic crown models.
Presented at IUFRO scientific conference on “Forest Growth and Timber
Quality: Crown Models and Simulation Methods for Sustainable Management”
Portland, Oregon, USA, Aug. 7-10.
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Temesgen, H., T. Barrett, V. LeMay, and G. Latta. 2007. Comparison of
nearest neighbor imputation methods for estimating frequency of cavity trees
for western Oregon and Washington forests. Presented at the 2007 Nearest
Neighbors Workshop, Florence, Italy. July 5-7.
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Weiskittel, A.R., S. Garber, and Temesgen, H. 2007.
Modeling regional variation in the self-thinning boundary line. Presented at
the quarterly “Growth Model User’s Group” Meeting. June 19, Vancouver,
Washington, USA.
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LeMay, V., H. Temesgen, A-A. Zumrawi, and P.L. Marshall. 2007. Ingrowths and mortality in partially cut complex stands of southeastern BC, and extensions to MPB-affected stands of central BC. Presented at the “Complex stand research and management conference”, Feb. 19-20, 2007, Smithers, BC, Canada.
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Temesgen, H. and A.R. Weiskittel. 2006. Mixed Model
Analysis of Leaf Area and Mass Data: Tales from the Dark Side of Tree
Crowns. Presented at the Department of Forestry Seminar series at Oklahoma
State University, Dec. 7, 2006, Stillwater, OK.
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Temesgen, H., B.N.I Eskelson, and T. Barrett. 2006.
Variance estimation in the presence of nearest neighbor imputed data.
Presented at the 2006 Nearest Neighbors Workshop. Aug. 28-30. Minneapolis,
MN.
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Eskelson, B.N.I., H. Temesgen, and T. M. Barrett.
2006. Estimating stand tables from aerial attributes: a Comparison of
stratified and non-stratified most similar neighbor imputation approaches
for western Oregon’s forests. Presented at the 2006 Western Mensurationists
Meeting. June 18-20. Fortuna, CA.
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Temesgen, H. T. Barrett, and G. Latta. 2005. Cavity
Tree Abundance and Stand Characteristics in Western Oregon Forests:
Relationships and predictions. Presented at the 22nd IUFRO world congress,
August 8-13 2005, Brisbane, Australia.
Selected theses:
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Younger, Nicole L. 2007. Taper, Crown, and Volume Responses of a Coastal Oregon
Douglas-fir Stand to Sulfur Treatments for Control of Swiss Needle Cast. MS
thesis. Oregon State University.
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Drake, Timothy 2008. Empirical modeling of windthrow occurrence in
streamside corridors. MS thesis. Oregon State University.
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