Index Catalog // ScholarsArchive@OSU

Sampling Strategies for Efficient Estimation of Tree Foliage Biomass

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:: Sampling Strategies for Efficient Estimation of Tree Foliage

Application of the variable plot method of sampling forest stands

Creator:: Bell, John F., Alexander, Lucien B., and Oregon State Board of Forestry
Resource Type:: Technical Report
Full Text:: Research Note No. 30 APPLICATION OF THE 'VARIABLE PLOT METHOD OF SAMPLING FOREST STANDS by John F

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:: Accuracy and suitability of selected sampling

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:: Pacific Northwest . Monitoring . Stand structure . Strip sampling 1 Introduction Forest landscape

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
Full Text:: m). To optimize sampling and long-term monitoring designs, search algorithms in combination with

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

Laws, regulations, and management plans to improve streamflow and stream temperature : a case study in the North Fork Burnt River Watershed

Creator:: Morgan-Hayes, Anna S.
Abstract:: As the western United States faces warmer and increasingly varied climate conditions, as well as predicted water insecurity, concerns over water quality and water availability are growing. While humans, fish, and wildlife are dependent on clean water for survival in the present, management of water resources needs to consider future...
Resource Type:: Capstone Project
Full Text:: monitoring data points to potential strategies for restoration such as riparian enhancement, channel

The roles of nearest neighbor methods in imputing missing data in forest inventory and monitoring databases

Creator:: Eskelson, Bianca N.I., Temesgen, Hailemariam, Lemay, Valerie, Barrett, Tara M., Crookston, Nicholas L., and Hudak, Andrew T.
Abstract:: Almost universally, forest inventory and monitoring databases are incomplete, ranging from missing data for only a few records and a few variables, common for small land areas, to missing data for many observations and many variables, common for large land areas. For a wide variety of applications, nearest neighbor (NN)...
Resource Type:: Article
Full Text:: nearest neighbor methods in imputing missing data in forest inventory and monitoring databases REVIEW

Using Airborne Light Detection and Ranging as a Sampling Tool for Estimating Forest Biomass Resources in the Upper Tanana Valley of Interior Alaska

Creator:: Andersen, Hans-Erik, Strunk, Jacob, and Temesgen, Hailemariam
Abstract:: Airborne laser scanning, collected in a sampling mode, has the potential to be a valuable tool for estimating the biomass resources available to support bioenergy production in rural communities of interior Alaska. In this study, we present a methodology for estimating forest biomass over a 201,226-ha area (of which 163,913...
Resource Type:: Article
Full Text:: given forest area, and lowering the diameter threshold will reduce the sampling error associated with

Sounds of Douglas fir beetle activity : recorded and interpreted, equipment techniques

Creator:: Allen, Donald G., Michael, Robert R., Stone, Solon A., and Oregon Forest Lands Research Center
Resource Type:: Technical Report
Full Text:: micro- phone, Model 805, was used for all monitoring and recording in the 1956 work. Earphones were used

Conserving energy by environmentally acceptable practices in maintaining and procuring transmission poles for long service ; September 1995

Creator:: Morrell, Jeffrey J., Corden, M. E. (Malcolm E.), and Oregon State University. Department of Forest Products
Abstract:: Previously established field trials of MTTC-Fume continue to show that this chemical remains in Douglas-fir and southern pine poles at fungitoxic levels 5 years after treatment. In general, increasing dosages resulted in higher chemical levels in the poles. All of the MITC-Fume treatments resulted in higher residual M1TC levels than...
Resource Type:: Technical Report
Full Text:: bored zone were generally above the threshold for fungal growth. Prior sampling of Douglas-fir poles

Cruising with a Crystal Ball: Estimating Timber Density with a Wedge Prism

Creator:: Breckel, Carrie
Abstract:: Foresters use a wedge shaped prism to estimate timber density in a stand in a process called variable plot sampling. Featuring Dr. John Bell.
Resource Type:: Learning Object
Full Text:: simplest is called variable-plot sampling. When using this method, a forester stands at a point in the

Conserving energy by environmentally acceptable practices in maintaining and procuring transmission poles for long service ; August 1993

Creator:: Morrell, Jeffrey J., Corden, M. E. (Malcolm E.), and Oregon State University. Department of Forest Products
Abstract:: Evaluation of previously established field trials of internal remedial treatments continues to verify the excellent long-term protection afforded by these treatments. Field trials with gell encapsulated methylisothiocyanate (MITC) demonstrate that gelatin does not interfere with chemical release, nor is addition of supplemental moisture required for release. Field trials have been...
Resource Type:: Technical Report
Full Text:: also isolated from poles in drier climates. Sampling of additional poles is planned to provide a more

Using multilevel remote sensing and ground data to estimate forest biomass resources in remote regions: a case study in the boreal forests of interior Alaska

Creator:: Andersen, Hans-Erik, Strunk, Jacob, Temesgen, Hailemariam, Atwood, Donald, and Winterberger, Ken
Abstract:: The emergence of a new generation of remote sensing and geopositioning technologies, as well as increased capabilities in image processing, computing, and inferential techniques, have enabled the development and implementation of increasingly efficient and cost-effective multilevel sampling designs for forest inventory. In this paper, we (i) describe the conceptual basis...
Resource Type:: Article
Full Text:: a multilevel sampling design, such as the diameter thresholds for tree measure- ments. In some

Oregon State Forester ; Vol. 20, No. 1 (January 1967)

Creator:: OSU Oregon Forestry Alumni Association
Abstract:: Magazine of the OSU Oregon Forestry Alumni Association.
Resource Type:: Other
Full Text:: thod of timber crlllsmg 3 Pee Sampling (prohability proportional to predic! ion) was in troduced in

Landscape characteristics and coho salmon (Oncorhynchus kisutch) distributions: explaining abundance versus occupancy

Creator:: Steel, E. A., Jensen, D. W., Burnett, K. M., Christiansen, K., Firman, J. C., Feist, B. E., Anlauf, K. J., and Larsen, D. P.
Abstract:: Distribution of fishes, both occupancy and abundance, is often correlated with landscape-scale characteristics (e.g., geology, climate, and human disturbance). Understanding these relationships is essential for effective conservation of depressed populations. We used landscape characteristics to explain the distribution of coho salmon (Oncorhynchus kisutch) in the Oregon Plan data set, one...
Resource Type:: Article
Full Text:: , probabilistic salmon monitoring data sets covering the full range of potential habitats. First we compared data

Effect of wood moisture content and rod dosage on boron or fluoride movement through Douglas-fir heartwood

Creator:: Cabrera, Yohanna and Morrell, J.J.
Abstract:: The potential for moisture sorption by boron and fluoride rods following application of rods to wood to affect subsequent chemical diffusion was investigated in small Douglas-fir blocks conditioned to 30, 60, or 90 percent target moisture content (MC). MCs tended to decline over the 180-day test period, but there was...
Resource Type:: Article
Full Text:: threshold 5 to 20 mm away from the treatment site in the 30 percent MC blocks until the 90 day sampling

Evaluating theories of drought-induced vegetation mortality using a multimodel– experiment framework

Creator:: McDowell, Nate G., Gehres, Nathan, Limousin, Jean Marc, Macalady, Alison, Martínez-Vilalta, Jordi, Mencuccini, Maurizio, Plaut, Jennifer A., Ogée, Jérôme, Robert E., Pangle, Rasse, Daniel P., Ryan, Michael G., Fisher, Rosie A., Sevanto, Sanna, Waring, Richard H., Williams, A. Park, Yepez, Enrico A., Pockman, William T., Xu, Chonggang, Domec, Jean-Christophe, Holtta, Teemu, Mackay, D. Scott, Sperry, John S., Boutz, Amanda, and Dickman, Lee
Abstract:: Model–data comparisons of plant physiological processes provide an understanding of mechanisms underlying vegetation responses to climate. We simulated the physiology of a pi~non pine–juniper woodland (Pinus edulis–Juniperus monosperma) that experienced mortality during a 5 yr precipitation-reduction experiment, allowing a framework with which to examine our knowledge of drought-induced tree mortality....
Resource Type:: Article
Full Text:: starvation 310 IV. On thresholds vs duration of stress as drivers of mortality 311 V. Interdependence of

Effect of floods of different magnitude on the macroinvertebrate communities of Matarranya stream (Ebro river basin, NE Spain)

Creator:: Argerich, A., Puig, M. A., and Pupilli, E.
Abstract:: In October 2000, the Matarranya River suffered an extraordinary flood with a measured flow rate of approximately 450 m³/s in the town of Vall-de-roures and a return period of about 500 years, according to the Ebro Hydrographic Confederation. The objective of this study was to determine the influence of the...
Resource Type:: Article
Full Text:: chosen as sampling sites. The Parrissal station, 8 km from the source with a practically natural flow

Effect of Copper on Long-Term Performance of Dazomet as an Internal Remedial Treatment in Douglas-Fir Poles

Creator:: Love, Connie S., Freitag, Camille M., and Morrell, Jeffrey J.
Abstract:: A solid, crystalline fumigant (dazomet) with and without a supplemental copper compound was evaluated as an internal decay control treatment on Douglas-fir poles in two long-term field tests. Methylisothiocyanate (MITC), the decomposition product of dazomet, was used as a measure of effectiveness. MITC levels in the wood were above the...
Resource Type:: Article
Full Text:: measure of effectiveness. MITC levels in the wood were above the threshold near the groundline application

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