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TemesgenHailemariamForestryEvaluationN-treeDistance.pdf

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...
Full Text:: , CA 94608. Hailemariam Temesgen, Oregon State University. Theresa Marquardt, Grays Harbor

Accuracy and suitability of selected sampling methods within conifer dominated riparian zones

Creator:: Marquardt, Theresa, Temesgen, Hailemariam, and Anderson, Paul D.
Abstract:: Sixteen sampling alternatives were examined for their performance to quantify selected attributes of overstory conifers in riparian areas of western Oregon. Each alternative was examined at eight headwater forest locations based on a 0.52 ha square stem maps. The alternatives were evaluated for selected stand attributes (trees per hectare, basal...
Resource Type:: Article
Full Text:: @oregonstate.edu (T. Marquardt), ailemariam.temesgen@oregonstate.edu (H. Temesgen), pdanderson@fs.fed.us P.D

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure1.tiff

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...

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure2.tiff

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...

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure3.tiff

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...

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure4.tiff

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...

Evaluation of n-tree distance sampling for inventory of headwater riparian forests of western Oregon

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

Evaluation of sampling methods to quantify abundance of hardwoods and snags within conifer-dominated riparian zones

Creator:: Marquardt, Theresa, Temesgen, Hailemariam, Anderson, Paul D., and Eskelson, Bianca
Abstract:: • Aims: Six sampling alternatives were examined for their ability to quantify selected attributes of snags and hardwoods in conifer-dominated riparian areas of managed headwater forests in western Oregon. • Methods: Each alternative was simulated 500 times at eight headwater forest locations based on a 0.52-ha square stem map. The...
Resource Type:: Article
Full Text:: abundance of hardwoods and snags within conifer-dominated riparian zones Theresa Marquardt & Hailemariam

Dependence of oxygen vacancy concentration in zirconia on processing parameters and reducing conditions

Creator:: Lee, Theresa A.
Abstract:: ¹¹¹In/Cd perturbed angular correlation (PAC) gamma spectroscopy was used to study the point defect thermodynamics of tetragonal zirconia (t-zirconia). PAC can be used to measure, among other things, oxygen vacancy defect concentrations in t-zirconia. Higher than expected concentrations of oxygen vacancies in undoped samples were found using PAC. It was...
Resource Type:: Dissertation
Full Text:: processing parameters and reducing conditions AN ABSTRACT OF THE THESIS OF Theresa. A. Lee for the degree

Estimating Riparian Understory Vegetation Cover with Beta Regression and Copula Models

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:: . Acknowledgments: We thank Theresa Marquardt for her insights on the data used, Jacob Strunk and Nathan Chelgren

ScholarsArchive@OSU

TemesgenHailemariamForestryEvaluationN-treeDistance.pdf

Accuracy and suitability of selected sampling methods within conifer dominated riparian zones

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure1.tiff

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure2.tiff

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure3.tiff

TemesgenHailemariamForestryEvaluationN-treeDistanceFigure4.tiff

Evaluation of n-tree distance sampling for inventory of headwater riparian forests of western Oregon

Evaluation of sampling methods to quantify abundance of hardwoods and snags within conifer-dominated riparian zones

Dependence of oxygen vacancy concentration in zirconia on processing parameters and reducing conditions

Estimating Riparian Understory Vegetation Cover with Beta Regression and Copula Models

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