Index Catalog // ScholarsArchive@OSU

Forest macro-arthropods as potential indicators of ecosystem conditions in Western Idaho : an analysis of community composition, biological diversity, and community structure

Creator:: Ruby, Margaret E.
Abstract:: Adaptive ecosystem management is a new paradigm for managing federal forests which requires regular monitoring of ecosystem function and diversity to measure the effects of management. Managers need new strategies and tools to help them assess their progress in maintaining healthy, productive and biologically diverse forests. Biomonitoring of select forest...
Resource Type:: Masters Thesis
Full Text:: Forest Science, the College of Forestry and the departments of Fisheries and Wildlife, and Botany and

Plant and amphibian assemblages in zero-order basins in the Oregon Coast Range

Creator:: Sheridan, Chris D.
Abstract:: We have a poor understanding of the biotic communities in zero-order basins, drainages extending from ridgelines to the initiation of first-order streams. This study describes baseline plant and amphibian composition in unmanaged zero-order basins in the Oregon Coast Range. Specifically, I studied: i) the spatial distribution and diversity of species,...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Science presented on June 3, 2002. Title: Plant and Amphibian

Disturbance and landscape history as a reference for evaluating forest management effects at a regional scale : examples from the Coast Range of Oregon, USA

Creator:: Nonaka, Etsuko
Abstract:: History is an invaluable source of information to understand and evaluate management influences on contemporary ecosystems and landscapes. The first two chapters (Chapters 2 and 3) explored the concept of historical range of variability (HRV) in landscape structure and stand structure using a stochastic fire simulation model to simulate presettlement...
Resource Type:: Masters Thesis
Full Text:: of Master of Science in Forest Science presented on November 25, 2003. Title: Disturbance and

The effects of thinning on forest-floor small mammals in the Coast Range of Oregon

Creator:: Larson, David J.
Abstract:: Thinning of young Douglas-fir forests has the potential to enhance structural diversity and improve habitat for wildlife. I examined the effects of thinning and thinning intensity on abundance and demographic characteristics of forest-floor small mammals in the Coast Range of Oregon 5 and 6 years after thinning had occurred. Thinning...
Resource Type:: Masters Thesis
Full Text:: Coast Range of Oregon by David J. Larson A THESIS submitted to Oregon State University in

Effects of thinning on forest-floor vertebrates and analysis of habitat associations along ecological gradients in Oregon coastal Douglas-fir forests

Creator:: Suzuki, Nobuya
Abstract:: Thinning has the potential to increase structural diversity of managed forests for wildlife. During 1994-1996, I conducted experimental and observational studies using pitfall trapping to assess short-term and potential long-term effects of thinning on abundance and reproduction of forest-floor vertebrates in Douglas-fir (Pseudotsuga menzeisii) forests of the Oregon Coast Range....
Resource Type:: Dissertation

The effect of fire regime on coarse woody debris in the west central Cascades, Oregon

Creator:: Wright, Pamela J.
Abstract:: This study examined the effect of fire regime on coarse woody debris (CWD) mass using a combination of field data and modeling. The objectives were to use field sampling to determine how CWD differs between two areas that have had different fire regimes, and investigate how fire frequency and severity,...
Resource Type:: Masters Thesis
Full Text:: ............................................................ 45 7 .1 Mean, standard deviation, and range of CWD mass (Mg/ha) for field data for each regime

Field classification of white pine blister rust stem-cankers on resistant western white pine in northern Idaho and determination of respective tissue damage through tree ring analysis

Creator:: Eckert, Amy I.
Abstract:: Western white pine historically dominated northern Idaho’s forested landscape and was the Inland Empire’s most economically important tree. White pine blister rust, caused by the exotic fungus Cronartium ribicola, played a principal role in the decline of western white pine. The pathogen causes branch and bole cankers, which usually girdle...
Resource Type:: Masters Thesis
Full Text:: of Lands, the St. Joe National Forest, Potlatch Corporation, and the University of Idaho provided

Arthropod communities on understory plants in thinned and unthinned Douglas-fir forests in the Oregon Coast Range

Creator:: Doolittle, Alyssa M.
Abstract:: This study assessed the effects of thinning on arthropod communities on understory plants in the Central Oregon Coast Range. Arthropods were sampled from five understory plants in five pairs of thinned and unthinned, young (50-80 yrs), managed Douglas-fir stands, from late May to mid-July of 1998. Vine maple (Acer circinatum),...
Resource Type:: Masters Thesis
Full Text:: each pair of thinned and unthinned stands in the Central Oregon Coast Range, 1998

Tree species-soils relationships in old-growth forests of the Oregon Coast Range

Creator:: Cross, Alison
Abstract:: Tree species directly and indirectly affect soil nutrient cycles. I sought to characterize soils and foliage associated with four common canopy tree species (Douglas-fir, western hemlock, western redcedar, and bigleaf maple) in mixed-species old-growth forests of the Oregon Coast Range and to determine whether and how soils differ among the...
Resource Type:: Masters Thesis
Full Text:: University in partial fulfillment of the requirements for the degree of Master of Science

The characteristics and dynamics of snags in Douglas-fir forests of the Oregon Coast Range

Creator:: Cline, Steven Paul
Abstract:: Snags, standing dead trees, are used by many species of wildlife. Despite the importance of snags their basic ecology remains unknown. Some forest management practices eliminate snags from the forest with a concomitant effect upon snag-dependent wildlife. My objective was to describe the density, spatial distribution, and physical character of...
Resource Type:: Masters Thesis

Snag longevity, bird use of cavities, and conifer response across three silvicultural treatments in the Oregon Coast Range

Creator:: Walter, Scott T.
Abstract:: In the interest of meeting multiple forest management goals that include maintenance of wildlife, particularly cavity-nesting birds, uneven-aged silvicultural treatments are used increasingly in the Pacific Northwest. However, questions remain regarding the responses of cavity-nesting birds and residual green trees to different harvest intensities and patterns. To study these issues,...
Resource Type:: Masters Thesis
Full Text:: varied academic adventures. The OSU College of Forestry Fish and Wildlife program and a J. Richard

Habitat structure and occupancy patterns of the montane frog, Rana cascadae, in the Cascade Range, Oregon, at multiple scales : implications for population dynamics in patchy landscapes

Creator:: Brown, Catherine, 1958-
Abstract:: Associations between occupancy patterns of a montane anuran species, Rana cascadae, and habitat structure at multiple scales were examined to investigate how population structure may influence persistence in spatially and temporally heterogeneous environments. Predictions were based on population dynamics suggested by source-sink and metapopulation models. Potential sites in three basins...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Forest Science presented on January 30. 1997. Title: Habitat Structure and

Comment on ‘‘Post-Wildfire Logging Hinders Regeneration and Increases Fire Risk’’

Creator:: Newton, M., Fitzgerald, S., Rose, R. R., Adams, P. W., Tesch, S. D., Sessions, J., Atzet, T., Powers, R. F., and Skinner, C.
Abstract:: Donato et al. (Brevia, 20 January 2006, p. 352) concluded that logging after wildfire kills natural regeneration and increases fire risk. We argue that their paper lacks adequate context and supporting information to be clearly interpreted by scientists, resource managers, policy-makers, and the public.
Resource Type:: Article
Full Text:: , Missoula, MT, 2003). 15. R. C. Rothermel, How to Predict the Spread and Intensity of Forest and Range

Riparian litter inputs to streams in the central Oregon Coast Range

Creator:: Hart, Stephanie K.
Abstract:: Riparian zone vegetation can influence terrestrial and aquatic food webs through variations in the amounts, timing, and nutritional content of leaf and other litter inputs. Differences in vegetation composition and density, as well as riparian topography, may modulate the strength and quality of these inputs. Changes in inputs to small...
Resource Type:: Masters Thesis
Full Text:: Department of Forestry. The researchers and staff of the CFER program made my research so much easier

Establishment and growth of natural and planted conifers ten years after overstory thinning and vegetation control in 50-year-old Douglas-fir stands

Creator:: Nabel, Mark R.
Abstract:: Forest managers of public lands in western Oregon and Washington have become increasingly interested in creating additional conifer cohorts in young, even-aged, second-growth Douglas-fir stands. The purpose of our research was to assess the establishment, survival, and growth of naturally-regenerated and underplanted conifers 10-13 years after overstory thinning and understory...
Resource Type:: Masters Thesis
Full Text:: State University’s College of Forestry, they had a history of thinning, and because they fall at

Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

Creator:: Halofsky, Jessica E.
Abstract:: Fire is the dominant disturbance process in western U.S. forests, and although effects of fire in upland forests are relatively well-studied, there is little information about fire effects on riparian forests, critical areas of the landscape for both habitat and water quality. This dissertation examines different aspects of fire effects...
Resource Type:: Dissertation
Full Text:: Rangeland Ecosystem Science Center (FRESC), Oregon State University (OSU), the Bureau of Land Management

Terrestrial amphibian distribution, habitat associations and downed wood temperature profiles in managed headwater forests with riparian buffers in the Oregon Coast Range

Creator:: Kluber, Matthew R.
Abstract:: Western forests have become increasingly fragmented landscapes dominated by young stands. Given that western Oregon forests largely consist of headwater systems, there is a need to better understand how headwater forest taxa and their habitats are impacted by forest management practices. Several amphibian species associated with forested headwater systems have...
Resource Type:: Masters Thesis
Full Text:: : riparian wildlife and forestry interactions. College of Forest Resources, University of Washington

Effects of vegetation and disturbance on fungal communities in the western Cascades of Oregon

Creator:: Kageyama, Stacie Ann, 1967-
Abstract:: The use of high throughput molecular methods that allow for the study of bacterial communities in environmental samples is commonplace in microbial ecology. Until recently, fungal community ecology has focused on isolation, collection of sporocarps, or collection of ectomycorrhizal roots. The techniques used to extract and amplify DNA from environmental...
Resource Type:: Dissertation
Full Text:: the Minority Pipeline Fellowship. The department of Crop and Soil Science provided me with a

Hazard rating system for spruce weevil (Pissodes strobi) in Sitka spruce in the northern Oregon Coast Range

Creator:: Lysak, Teresa
Abstract:: The spruce weevil (Pissodes strobi) is a serious pest of Sitka spruce in Oregon. Weevils cause damage by killing the leader of a tree, resulting in defects such as crooks and forks that can render the tree unmerchantable. In this study, spruce stands 16-25 years old were surveyed for weevil...
Resource Type:: Masters Thesis
Full Text:: Department of Forestry, for helping set up the project and acquiring the funding, and Doug Maguire

Habitat relationships of small terrestrial vertebrates and invertebrates in managed forests in the southern Oregon Cascades

Creator:: McDade, Kirsten Ayn
Abstract:: Silviculture systems that involve commercial thinning may provide higher quality wildlife habitat than traditional clearcut systems, yet such systems have not been vigorously tested. This prospective study examined forest floor animal abundance and habitat relationships under three different silviculture conditions: clearcuts, commercial thins, and uncuts. Eighteen stands, six per treatment,...
Resource Type:: Masters Thesis
Full Text:: and Pacific Northwest Research Station. Research partners include the University of Washington

Effects of input and redistribution processes on in-stream wood abundance and arrangement in Lookout Creek, western Cascades Range, Oregon

Creator:: Dreher, David Marshall
Abstract:: This study explored how selected input and redistribution processes affect the amount and arrangement of in-stream wood within the 64 km2 Lookout Creek watershed in the Andrews Forest, western Cascade Range, Oregon. A longitudinal inventory of in-stream wood was conducted over approximately 20 km of stream length in 2nd to...
Resource Type:: Masters Thesis
Full Text:: Department of Forest Science, Oregon State University, and the U.S. Forest Service Pacific Northwest

Comparison of stand development of a deciduous-dominated riparian forest and a coniferous-dominated riparian forest in the Oregon Coast Range

Creator:: Poage, Nathan Jeremy
Abstract:: Riparian forests in the central Oregon Coast Range vary along a coniferous-deciduous compositional continuum. Variations in structure and composition affect water quality, fish and wildlife, biodiversity, timber, and aesthetics. A retrospective approach was taken in this study in order to understand and compare the structure, pattern, and history of an...
Resource Type:: Masters Thesis

Habitat use by cavity-nesting birds in young thinned and unthinned Douglas-fir forests of western Oregon

Creator:: Weikel, Jennifer M.
Abstract:: There is limited information on how to manage young forests of the Pacific Northwest to benefit wildlife populations. Commercial thinning is becoming more important in young forests both as a tool for timber management and to hasten the development of old-forest characteristics. There is some evidence that many species of...
Resource Type:: Masters Thesis

Time-based nitrogen availability and risk of Taeniatherum caput-medusae (L.) Nevski invasion in central Oregon

Creator:: Stubbs, Michelle M.
Abstract:: During the last century, fire suppression, grazing, and climate change have caused sagebrush grasslands to be altered in both function and form; juniper and sagebrush dominate the landscape at the expense of herbaceous plants. Management efforts to reduce juniper and sagebrush overstory in order to enhance herbaceous components of the...
Resource Type:: Masters Thesis
Full Text:: , USA. 6 Laycock, W.A. (1991) Stable states and thresholds of range condition on North American

The influence of forest management on headwater stream amphibians at multiple spatial scales

Creator:: Stoddard, Margo A.
Abstract:: To effectively manage for biodiversity at broad, ecosystem scales, the influences of habitat structure at multiple spatial scales on vertebrate species must be understood. There are few studies on the broad-scale habitat requirements of stream amphibians despite their importance in streams in forest ecosystems in the Pacific Northwest (PNW) as...
Resource Type:: Masters Thesis
Full Text:: (Oregon State University College of Forestry). Several landowners and administrators provided land use

Douglas-fir hydraulic architecture and relationships among xylem properties at multiple scales via a Bayesian analysis

Creator:: Dunham, Sonya M.
Abstract:: This study investigated variation in xylem anatomy, hydraulic properties, and the relationship between anatomy and properties within Douglas-fir trees at multiple scales. The hierarchical scales in the study included fertilization treatments (fertilized and unfertilized), trees within the treatments, and positions within the trees. Tracheid diameter, tracheid length, percent latewood, number...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Science and Wood Science presented on April 21, 2006. Title

Remote sensing of forest aboveground biomass using the Geoscience Laser Altimeter System

Creator:: Pflugmacher, Dirk
Abstract:: Accurate estimates of forest aboveground biomass are needed to reduce uncertainties in the terrestrial carbon flux. The Geoscience Laser Altimeter System (GLAS) onboard the Ice, Cloud and land Elevation Satellite is now the first spaceborne lidar sensor that will provide global estimates of vegetation height. This study investigated the utility...
Resource Type:: Masters Thesis
Full Text:: Sensing in Ecology, the College of Forestry, and my family and friends for your support and guidance

Influence of light on the growth of advance regeneration in the understory of Douglas-fir dominated forests in western Oregon

Creator:: Deisenhofer, Florian
Abstract:: The growth potential of Douglas-fir, grand fir and western hemlock advance regeneration in the forest understory of Douglas-fir-dominated forests was investigated to detennine the feasibility of selection cutting systems in northwest Oregon. This study compared the growth of Douglas-fir, grand fir and western hemlock advance regeneration along a light gradient...
Resource Type:: Masters Thesis
Full Text:: Scholarship Program of Oregon State University, and the College of Forestry for their financial support and

Vegetation and soil microbial communities three years after wildfire in spruce-fir forests of northwestern Wyoming

Creator:: Hooke, Jennifer Suzanne
Abstract:: The Normalized Burn Ratio and Composite Burn Index were used to classify burn severity in three sites that experienced lightning-ignited wildfire in the year 2000. The effect of burn severity (unburned, low, moderate, and high severity classes) was investigated on vegetation and soil microbial community composition. Vegetation communities showed a...
Resource Type:: Masters Thesis
Full Text:: assistance of the Oregon State University Departments of Forest Resources and Forest Science. My graduate

Response of wood-boring beetles (Coleoptera: Buprestidae, Cerambycidae) to prescribed understory burning in mixed-conifer stands of southwestern Oregon

Creator:: Duane, Maureen V.
Abstract:: Prescribed burning is increasingly being used as a management tool to reduce potential fuels on the forest floor and promote stand vigor through removal of dense, crowded vegetation. Because fire affects both the standing vegetation and the amount of downed wood in the ecosystem, it is imperative to examine how...
Resource Type:: Masters Thesis
Full Text:: wildlife. This study focuses on two families of wood-boring beetles, (Coleoptera: Buprestidae and

Presence, relative abundance, and resource selection of bats in managed forest landscapes in western Oregon

Creator:: Arnett, Edward B.
Abstract:: I studied presence, relative abundance, and resource selection of bats in managed Douglas-fir (Pseudotsuga menziesii) forests in western Oregon from May through September, 1999–2001. Species richness was not related to elevation, density of snags, or length of edge or perennial streams in sampled landscapes. I captured bats more frequently in...
Resource Type:: Dissertation
Full Text:: Improvement (NCASI), National Fish and Wildlife Foundation (NFWF), Oregon Department of Fish and Wildlife

Response of small mammal mycophagy to varying levels and patterns of green-tree retention in mature forests of western Oregon and Washington

Creator:: Jacobs, Katherine M.
Abstract:: The Demonstration of Ecosystem Management Options (DEMO) study is a large-scale, multi-year, interdisciplinary project examining the effects of various levels and patterns of green-tree retention on multiple forest features. Six retention levels and patterns were examined and replicated across six blocks of predominately Douglas-fir forested land in western Oregon and...
Resource Type:: Masters Thesis
Full Text:: University in partial fulfillment of the requirements for the degree of Master of Science Presented

Distribution of bats in Southeast Alaska and selection of day-roosts in trees by Keen’s myotis on Prince of Wales Island, Southeast Alaska

Creator:: Boland, Julia L.
Abstract:: We conducted capture and acoustic surveys for bats in six areas along a latitudinal gradient in Southeast Alaska from mid-May to September in 2005 and we continued surveys on Prince of Wales Island from mid-May to September in 2006. We determined the level of effort required to catch each species...
Resource Type:: Masters Thesis
Full Text:: Wright, Sara Hagen, and Vi Campbell from the College of Forestry and Mary Page and Tri Schodorf from

Prescribed fire in a ponderosa pine stand in the Blue Mountains, Oregon : relationships among post-fire scolytidae incidence, delayed tree mortality, snag decay dynamics, and woodpecker snag use

Creator:: Kangas, Michael
Abstract:: Delayed tree mortality is an unpredictable occurrence when prescribed burning is implemented. Fire scorched trees may die as the result of crown scorching, stem charring, root injury, bark beetle attack, or through a combination of these factors. This study examined ponderosa pine mortality and the incidence of two bark beetle...
Resource Type:: Masters Thesis
Full Text:: , and Camille Freitag of the Department of Wood Science and Engineering, and Walter Thies of the

Influences of salvage logging on forest birds after fire in the eastern Cascades, Oregon

Creator:: Cahall, Rebecca E.
Abstract:: Previous research examining the influences of post-fire salvage logging on abundances of birds has focused primarily on the response of cavity-nesting species. There is limited research in regard to the impact of salvage logging on a broader range of bird species. In addition, little is known about how different intensities...
Resource Type:: Masters Thesis
Full Text:: of Forestry and the Department of Forest Science. I would like to thank my co-advisors Dr.’s John

The biology and ecology of Potentilla recta in the Blue Mountains of northeastern Oregon

Creator:: Tuitele-Lewis, Jamison
Abstract:: Two experiments were conducted on the invasive plant species Potentilla recta in northeastern Oregon to investigate both biological and ecological characteristics of the species. Growth analysis was conducted on the plant at three sites over a period of two years (2002 and 2003). Relative growth rate (RGR) was calculated for...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Science presented on September 15, 2004. Title: The Biology and

Stress response as a basis for disease susceptibility in Ponderosa Pine

Creator:: Koonce, Andrea
Abstract:: Trees stressed by artificial and natural means were sampled for response in growth and vigor, carbohydrate content, resin pressure characteristics, and water relations. Tree response was found to reflect both the severity and type of stress imposed. Crown color and appearance were reliable indicators of prolonged stress and advanced decline...
Resource Type:: Masters Thesis
Full Text:: type of stress imposed. Crown color and appearance were reliable indicators of prolonged stress and

Impact of Armillaria and annosus root diseases on stand and canopy structure, species diversity, and down woody material in a central Oregon mixed-conifer forest

Creator:: Fields, Kristen L. N.
Abstract:: White and grand fir are both valuable components of the mixed-conifer stand structure managed for late-successional reserves in central Oregon. However, they are often short-lived species because of high susceptibility to root diseases, defoliating insects, bark beetles, and wildfire. This study focuses on the effects of root diseases caused by...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Science presented on November 11, 2003. Title: Impact of Armillaria

Silviculture-ecology of three native California hardwoods on high sites in north central California

Creator:: McDonald, Philip M.
Abstract:: Pacific madrone, tanoak, and California black oak are the most economically promising native California hardwoods. Volume and value data indicate upward trends in growing stock levels and prices received for their products. These trends are likely to continue. They suggest research is particularly needed for: (1) seed fall and regeneration,...
Resource Type:: Dissertation
Full Text:: persist in a wide range of environments, and would like to know more about how this is accomplished

Regional gradient analysis and spatial pattern of woody plant communities in Oregon

Creator:: Ohmann, Janet L.
Abstract:: Knowledge of regional-scale patterns of plant community structure and controlling factors is largely qualitative and based on numerous local studies. Data from a subsample of 10,000 field plots were used to quantify and map compositional gradients of woody plant communities across Oregon forests. Canonical correspondence analyses explained 9-14% of the...
Resource Type:: Dissertation
Full Text:: physical and biological factors that operate across a range of scales. Historically, ecological

Forest canopy sturcture in western Oregon : characterization, methods for estimation, prediction, and importance to avian species

Creator:: Fiala, Anne C. S.
Abstract:: Characterization of canopy structure, the horizontal and vertical distribution of the tree crowns in a forest, is important for the management of forests in the Pacific Northwest. The canopy is an important habitat element for many wildlife species, canopy structure affects understory development, and influences various natural processes, such as...
Resource Type:: Masters Thesis

Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

Creator:: Grossmann, Emilie B.
Abstract:: I conducted two separate studies, both related to the impacts of spring and fall prescribed fire on ponderosa pine (Pinus ponderosa Dougl. ex Loud.) forest soils in Eastern Oregon. The studies were either conducted at or linked to four stands of ponderosa pine, in the Malheur National Forest. Each stand...
Resource Type:: Masters Thesis
Full Text:: Dreisbach, Rick Kelsey, the mycology group in Forestry Sciences Laboratory and Phil Sollins. I'd also like

Analyzing patterns of woody plant richness at multiple spatial scales with modeled photosynthesis

Creator:: Swenson, Jennifer J.
Abstract:: The hump-shaped relationship that predicts highest species richness (species/unit area) at intermediate levels of productivity was examined for woody plants across the Pacific and Inland Northwest of the U.S. Many studies have examined this relationship at regional scales, but commonly use species range maps and surrogate measures of productivity (e.g....
Resource Type:: Dissertation

The timber harvesting behavior of family forest owners

Creator:: Butler, Brett J.
Abstract:: To increase our understanding of the timber harvesting behavior of family forest owners, I developed theoretical and empirical timber harvesting models for family forest owners in the southeastern United States. An individual-choice model was the basis for the models. Family forest owners were modeled as utility-maximizers who made harvesting decisions...
Resource Type:: Dissertation
Full Text:: owners 51 4.4 Distribution (median, interquartile range, outliers, and extreme values) of harvesting

Geographic and seasonal variation in photosynthetic efficiency and capacity of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Creator:: Pope, Walter William
Abstract:: Net photosynthesis was measured for photosynthetic light efficiency and capacity on two-year-old plants from eight different seed sources in three measurement periods. The measurement periods corresponded to the physiological periods 1) prior to bud swelling, 2) after needle elongation, and 3) predormancy. Measurement period differences in both photosynthetic efficiency and...
Resource Type:: Dissertation
Full Text:: ) Forest Science (Major) for the DOCTOR OF PHILOSOPHY in --~~~(~De~g-r~ee~)~~~-- presented on ------r

Evaluating the restoration potential of black cottonwood (Populus trichocarpa) from multiple scales of observation, Grande Ronde River Basin, Oregon, USA

Creator:: Hines, Cynthia A.
Abstract:: As a key factor contributing to slope stability, in-stream habitat for aquatic species (e.g., salmonids), nutrient cycling, and corridors for upland species, riparian vegetation and its maintenance is of critical conservation importance. Subsequently, the chronic degradation of aquatic and riparian ecosystems in the semi-arid and arid landscapes of the western...
Resource Type:: Masters Thesis
Full Text:: College of Forestry and the National Science Foundation Landscape Studies Traineeship Program; the

Patterns of growth and seasonal changes in the concentrations of abscisic acid and indoleacetic acid in roots of western hemlock

Creator:: Brown, Charles Joseph
Abstract:: The capacity for root growth and concentration of indole-3-acetic acid and abscisic acid in the roots of western hemlock seedlings was investigated. The root regenerating capacity (RRC) was defined as the increase in root length, greater than 5 mm, following a 28-day test period. RRC measurements over a two-year period...
Resource Type:: Masters Thesis
Full Text:: sharp reduction in water uptake in some species in the temperature range of 10 to 20°C and not near

Stable, low-growing plant communities in the western Cascade Mountains : species processes and their implications for rights-of-way management

Creator:: Nesmith, Jonathan C. B.
Abstract:: The processes that lead to stable, low-growing plant communities and the characteristics of the species that form them are of great interest to rights-of-way (ROW) managers and others wishing to better understand plant community resistance to tree invasion on managed landscapes. The use of stable, low-growing plant communities as a...
Resource Type:: Masters Thesis

Fungal diversity within decomposing woody conifer roots in Oregon

Creator:: Vandegrift, V. Eleanor
Abstract:: Previous studies have indicated that roots from five tree species (Picea sitchensis, Tsuga heterophylla, Pseudotsuga menziesii, Pinus ponderosa, and Pinus contorta) decompose at different rates across an environmental gradient in Oregon. Measurements of wood chemistry from each tree species as well as moisture and temperature from each location do not...
Resource Type:: Masters Thesis
Full Text:: for sequencing. Thanks to the Departments of Forest Science and Botany and Plant Pathology at

The ecological legacy of Indian burning practices in southwestern Oregon

Creator:: Carloni, Kenneth R.
Abstract:: Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to ecosystem change in southwestern Oregon? A brief introduction to the Little River study area is followed by a cultural and ecological history of the watershed....
Resource Type:: Dissertation
Full Text:: -American settlement and into the period of industrial forestry. Objective 3: To test hypotheses

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