Index Catalog // ScholarsArchive@OSU

Accuracy and suitability of several stand sampling methods in riparian zones

Creator:: Marquardt, Theresa
Abstract:: Stand structure in headwater riparian areas of western Oregon is highly variable making quantification of structural attributes within these stands difficult. A reliable sampling design is important to characterize and monitor changes in stand structure over time. This study examined sixteen alternatives for sampling live conifers and six alternatives for...
Resource Type:: Masters Thesis
Full Text:: 1 AN ABSTRACT OF THE THESIS OF Theresa Marquardt for the degree of Master of Science in

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

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

Forest Measurement and Biometrics in Forest Management: Status and Future Needs of the Pacific Northwest USA

Creator:: Temesgen, Hailemariam, Goerndt, Michael E., Johnson, Greg P., Adams, Darius M., and Monserud, Robert A.
Abstract:: Forest measurement and biometrics (FMB) programs have been at the heart of forestry education in North America since its beginnings at the Biltmore Forest School more than 100 years ago. Over the intervening period, the field of forestry has changed in critical ways. There are many forest management and policy...
Resource Type:: Article
Full Text:: Sessions, and Gyde Lund; Jim Alegria, Rick Dawson (Bureau of Land Management); Bianca Eskelson, Theresa

The dynamics of oxygen vacancies in zirconia : an analysis Of PAC data

Creator:: Alves, Mauro A.
Abstract:: Nuclear techniques such as perturbed angular correlation (PAC) sample the hyperfine interactions of a large number of probe atoms in specific crystallographic sites. Real crystals contain static defects producing a distribution of electric field gradients (EFGs) that add to the ideal EFG of the crystal at any given probe site....
Resource Type:: Dissertation
Full Text:: , Dr. Herbert Jaeger, Dr. Theresa A. Lee, Dr. Niels Mommer and Dr. Matthew 0. Zacate. Their diligent

2005 Annual report for the College of Forestry and the Oregon Forest Research Laboratory / Oregon State University

Creator:: Oregon State University. Forest Research Laboratory and Oregon State University. College of Forestry
Resource Type:: Other
Full Text:: Kasenberg Carl Lehman Jeremy Marquardt Dustin McCoy Blake McKinley Cum laude Waylon Mobley

Geostatistical modeling of riparian forest microclimate and its implications for sampling

Creator:: Eskelson, Bianca N.I., Anderson, Paul D., Hagar, Joan C., and Temesgen, Hailemariam
Abstract:: Les modèles de prédiction du microclimat pour différentes conditions de station dans les zones riveraines boisées des cours d’eau de tête de bassin sont peu développés et les procédures d’échantillonnage pour caractériser les gradients sous-jacents du microclimat riverain sont rares. Nous avons utilisé des données de microclimat riverain collectées le...
Resource Type:: Article

ScholarsArchive@OSU

Accuracy and suitability of several stand sampling methods in riparian zones

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

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

Forest Measurement and Biometrics in Forest Management: Status and Future Needs of the Pacific Northwest USA

The dynamics of oxygen vacancies in zirconia : an analysis Of PAC data

2005 Annual report for the College of Forestry and the Oregon Forest Research Laboratory / Oregon State University

Geostatistical modeling of riparian forest microclimate and its implications for sampling

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