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Creator:: Weiskittel, Aaron R., MacFarlane, David W., Radtke, Philip J., Affleck, David L.R., Temesgen, Hailemariam, Woodall, Christopher W., Westfall, James A., and Coulston, John W.
Abstract:: Tree biomass is typically estimated using statistical models. This review highlights five limitations of most tree biomass models, which include the following: (1) biomass data are costly to collect and alternative sampling methods are used; (2) belowground data and models are generally lacking; (3) models are often developed from small...
Resource Type:: Article
Full Text:: /jof.14-091 Society of American Foresters Version of Record http://cdss.library.oregonstate.edu/sa

Creator:: Goerndt, Michael E., Monleon, Vicente J., and Temesgen, Hailemariam
Abstract:: Small-area estimation (SAE) is a concept that has considerable potential for precise estimation of forest ecosystem attributes in partitioned forest populations. In this study, several estimators were compared as SAE techniques for 12 counties in the northern Oregon Coast range. The estimators that were compared consisted of three indirect estimators,...
Resource Type:: Article
Full Text:: . Copyright © 2013 by the Society of American Foresters. 536 Forest Science 59(5) 2013 synthetic estimator

Creator:: Haxtema, Zane, Temesgen, Hailemariam, and Marquardt, Theresa
Abstract:: n-Tree distance sampling (NTDS), also known as k-tree sampling and point-to-tree sampling, has been promoted as a practical method for forest inventory. This simulation study evaluated the performance of three NTDS estimators, as compared with fixed plot sampling and horizontal point sampling, for estimating density and basal area in headwater...
Resource Type:: Article

Creator:: Temesgen, Hailemariam, Eskelson, Bianca N. I., Maness, Thomas C., Adams, Darius M., and Burkhart, Harold E.
Abstract:: Foresters face new and evolving challenges as society reconsiders the balance of its interests between wood production and the provision of ecosystem services in the management of forests. Whatever paths this process may take, sound and broad-based decisions will continue to require accurate and relevant measurements of current forest conditions...
Resource Type:: Article
Full Text:: and evolving challenges as society reconsiders the balance of its interests between wood production

Creator:: Weiskittel, Aaron, Gould, Peter, and Temesgen, Hailemariam
Abstract:: The species self-thinning boundary line has been widely analyzed with a variety of statistical techniques. Most previous studies in the forestry literature have reported that the relationship does not differ across a range of stand and site factors, but these studies have primarily used statistical techniques that make model fitting...
Resource Type:: Article
Full Text:: article. Manuscript received January II, 2008, accepted June 25, 2008 Copyright © 2009 by the Society of

Creator:: Eskelson, Bianca N.I., Madsen, Lisa, Hagar, Joan C., and Temesgen, Hailemariam
Abstract:: Understory vegetation communities are critical components of forest ecosystems. As a result, the importance of modeling understory vegetation characteristics in forested landscapes has become more apparent. Abundance measures such as shrub cover are bounded between 0 and 1, exhibit heteroscedastic error variance, and are often subject to spatial dependence. These...
Resource Type:: Article
Full Text:: 17, 2010 Copyright © 2011 by the Society of American Foresters 212 Forest Science 57(3) 2011

Creator:: Temesgen, Hailemariam, Monleon, Vicente, Weiskittel, Aaron, and Wilson, Duncan
Abstract:: Conifer crowns can be highly variable both within and between trees, particularly with respect to foliage biomass and leaf area. A variety of sampling schemes have been used to estimate biomass and leaf area at the individual tree and stand scales. Rarely has the effectiveness of these sampling schemes been...
Resource Type:: Article
Full Text:: . Manuscript received May 31, 2009, accepted August 11, 2010 Copyright © 2011 by the Society of American

Creator:: Goerndt, Michael E., Monleon, Vicente J., and Temesgen, Hailemariam
Abstract:: Three sets of linear models were developed to predict several forest attributes, using stand-level and single-tree remote sensing (STRS) light detection and ranging (LiDAR) metrics as predictor variables. The first used only area-level metrics (ALM) associated with first-return height distribution, percentage of cover, and canopy transparency. The second alternative included...
Resource Type:: Article
Full Text:: Society of American Foresters. WEST. J. APPL. FOR. 25(3) 2010 105 A B S T R A C T From height

Creator:: Temesgen, Hailemariam, Hann, David W., and Monleon, Vincente J.
Abstract:: Selected tree height and diameter functions were evaluated for their predictive abilities for major tree species of southwest Oregon. Two sets of equations were evaluated. The first set included four base equations for estimating height as a function of individual tree diameter, and the remaining 16 equations enhanced the four...
Resource Type:: Article

Creator:: Eskelson, Bianca N.I., Temesgen, Hailemariam, and Barrett, Tara M.
Abstract:: Information on current forest condition is essential to assess and characterize resources and to support resource management and policy decisions. The 1998 Farm Bill mandates the US Forest Service to conduct annual inventories to provide annual updates of each state's forest. In annual inventories, the sample size of I year...
Resource Type:: Article
Full Text:: the Society of American Foresters 64 Forest Science 55(1) 2009 esipp Text Box This file was

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