Skip to Content

Switch language English
- Switch language
- Deutsch
- English
- Español
- Français
- Italiano
- Português do Brasil
- 中文
Login

ScholarsArchive@OSU

Home
About
Help
Contact

Search ScholarsArchive@OSU

Advanced Search

Search Constraints

Start Over

Filtering by: Academic Affiliation Forest Science Remove constraint Academic Affiliation: Forest Science Decade 2000-2009 Remove constraint Decade: 2000-2009 Resource Type Dissertation Remove constraint Resource Type: Dissertation Rights Statement Copyright Not Evaluated Remove constraint Rights Statement: Copyright Not Evaluated

« Previous | 1 - 20 of 26 | Next »

Relevance
Title [A-Z]
Title [Z-A]
Date Created ▼
Date Created ▲
Date Uploaded ▼
Date Uploaded ▲

Number of results to display per page

10 per page
20 per page
50 per page
100 per page

View results as:

List Gallery Masonry

Search Results

Effects of canopy gaps in Douglas-fir forests and resource gradients on fecundity and growth of understory herbs

Creator:

St. Pierre, Elizabeth A. (Elizabeth Ann)

Abstract:

Effects of small-scale disturbances on fecundity and growth rates of Linnaea borealis L., Tiarella trifoliata L. var. unifoliata, and Trillium ovatum Pursh. were studied in old-growth forests in the Tsuga heterophylla Zone on the west slope of the Cascade Mountain Range of Oregon. Performance of each species was compared in...

Resource Type:

Dissertation
Patterns of nitrogen fluxes in watersheds of the H.J. Andrews Experimental Forest, OR

Creator:

Vanderbilt, Kristin Lynn, 1967-

Abstract:

Seasonal and annual patterns of N fluxes and concentrations in streamwater in six conifer-dominated watersheds at the H.J. Andrews Experimental Forest, OR, were studied to gain insight into the factors that influence N retention in this ecosystem. Processes affecting N flux in streamwater differed between organic (DON) and inorganic (DIN;...

Resource Type:

Dissertation
Influence of root architectural development on Douglas-fir seedling morphology and physiology

Creator:

Jacobs, Douglass Frederick

Abstract:

A series of experiments were established to gain a better understanding of the extent to which Douglas-fir seeding root architecture may be manipulated and subsequent influences on seedling morphological and physiological development. The incorporation of amendments into nursery soils changed root architecture to some degree, but did not produce large...

Resource Type:

Dissertation
Spatial modeling of carnivore distribution and viability

Creator:

Carroll, Carlos

Abstract:

Viability analysis of well-selected focal species can complement other types of conservation planning by revealing thresholds in habitat area and landscape connectivity that may not be evident from ecosystem-level evaluations. I used focal species analysis of five carnivores to suggest conservation planning guidelines for the Rocky Mountains and adjacent areas...

Resource Type:

Dissertation
Maritime windstorm influence on soil process in a temperate rainforest

Creator:

Kramer, Marc G.

Abstract:

Maritime cyclonic windstorms cause widespread disturbance to forested ecosystems in southeast Alaska. The consequence of this disturbance process on the movement, storage, and quality of soil carbon, forest hydrology and streamwater chemistry was studied along a windthrow disturbance sequence. Soil profiles were described and the thickness of the major organic...

Resource Type:

Dissertation
Physiological impacts of Swiss needle cast on Douglas-fir

Creator:

Manter, Daniel K.

Abstract:

A series of studies, in three western Oregon Douglas-fir plantations, was conducted to understand the physiological impacts of Swiss needle cast on Douglas-fir physiology. Four aspects of the disease complex were investigated: fungal colonization and assessment, plant-water relations, carbon assimilation and interaction with climate. Several techniques were developed and used...

Resource Type:

Dissertation
Measuring and modeling gene flow from hybrid poplar plantations : implications for transgenic risk assessment

Creator:

DiFazio, Stephen P.

Abstract:

Hybrid poplar plantations (Populus trichocarpa x Populus deltoides) are a relatively new feature on the landscape in the Pacific Northwest of the United States, and these plantations may soon include genetically engineered trees. Meanwhile, many wild poplar populations (Populus spp.) are highly degraded due in part to logging, dams, grazing,...

Resource Type:

Dissertation
Development and application of SSR markers for measuring gene flow in Douglas-fir

Creator:

Slavov, Gancho Trifonov

Abstract:

Gene flow is a major evolutionary force and an important factor in the breeding and conservation of forest trees. I studied the applicability of SSR markers for measuring pollen-mediated gene flow (i.e., pollen flow) in Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco). I developed SSR markers, tested alternative approaches for measuring pollen...

Resource Type:

Dissertation
Early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) for Swiss needle cast tolerance

Creator:

Temel, Fatih

Abstract:

The relationship between the level of Phaeocryptopus gaeumannii (Rohde) Petrak colonization and severity of Swiss needle cast (SNC) symptoms, the possibility of early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco) for SNC tolerance, and geographic variation in coastal Oregon with respect to SNC tolerance were investigated. Comparisons between...

Resource Type:

Dissertation
Host associations of Tricholoma magnivelare, the American matsutake

Creator:

Lefevre, Charles K.

Abstract:

Beginning in the 1980s, large-scale commercial harvest of Tricholoma magnivelare created a need for management of forests to ensure sustainability, but little was known of the biology or ecology of this species to guide management decisions. Four of the five studies presented here explore the basic synecology of T. magnivelare...

Resource Type:

Dissertation
Spatial and temporal dynamics of anthropogenically influenced forests of the Brazilian Amazon

Creator:

Bergen, Scott

Abstract:

The Amazon Tropical Rain Forest is the largest tropical rain forest system, comprising approximately 65% of such forests on earth. Since the 1960's, human populations in the Brazilian Amazon have increased from two to over 20 million. Concomitant urbanization, forest conversion, and economic dependence on resource extraction have exerted severe...

Resource Type:

Dissertation
The role and function of fruit trees and fruit tree-based agroforestry systems in a highland watershed in northern Thailand

Creator:

Withrow-Robinson, Bradford A.

Abstract:

Field studies were conducted from 1996 to 1998 in three villages in a Highland watershed in Mae Hong Son Province, northern Thailand. The objectives of the study were to classify and define the fruit-based agroforestry cropping system and investigate management activities used by villagers. In the first part of the...

Resource Type:

Dissertation
Multiscale controls on woody riparian vegetation : distribution, diversity, and tree regeneration in four western Oregon watersheds

Creator:

Sarr, Daniel Allen

Abstract:

I studied riparian forests of four western Oregon watersheds (dry south to wet north) to determine the multiscale controls on woody riparian vegetation. I conducted separate analyses of controls on plant distribution, diversity, and tree regeneration using vegetation and environmental data collected in two related field studies: (1) a multiscale...

Resource Type:

Dissertation
Ecosystem effects of vegetation removal in coastal Oregon Douglas-fir experimental plantations : impacts on ecosystem production, tree growth, nutrients, and soils

Creator:

Yildiz, Oktay

Abstract:

Effects of partial understory removal on belowground and aboveground ecosystem properties were investigated in 5 and 15 yr old Douglas-fir (Pseudotsuga menziesll (Mirb.) Franco) experimental plantations in western Oregon. Seedling survival was not affected by understory removal at age 5 yr. But through age 15 yr, understory removal increased seedling...

Resource Type:

Dissertation
Influences of nitrogen on carbon dynamics in forest soil and density fractions

Creator:

Swanston, Christopher W.

Abstract:

Application of N fertilizer is a common forest management practice in the Pacific Northwest, yet the long-term influence of fertilization on forest soil properties is not well known. Although elevated N often increases mineralization of C and N from labile organic matter, negative effects have been documented in recalcitrant organic...

Resource Type:

Dissertation
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
Structure and development of old-growth Douglas-fir in central western Oregon

Creator:

Poage, Nathan Jeremy

Abstract:

The tree species and size structure of 9l old-growth forests dominated by Douglas-fir in central western Oregon was characterized using complete inventories of all trees larger than 20cm dbh over a mean area of 17.1ha at each site. Douglas-fir accounted for over 75% of the total average basal area (39.1...

Resource Type:

Dissertation
Size-related variation in tree growth and physiology

Creator:

McDowell, Nate G.

Abstract:

The goal of this dissertation was to improve our understanding of age-related constraints on aboveground production of forest trees. Previous research suggesting that carbon uptake of old trees is hydraulically constrained by tree size was used as the springboard for this research. Three specific working hypotheses were investigated: 1) compensation...

Resource Type:

Dissertation
Modeling nitrogen fixation in dead wood

Creator:

Hicks, William Thomas

Abstract:

A mechanistic simulation model of nitrogen fixation in dead wood was developed to help synthesize knowledge, develop hypotheses, and estimate rates of nitrogen fixation in the Pacific Northwest. In this model nitrogen fixation is directly controlled by log substrate, temperature, moisture, and oxygen content. Respiration and diffusion of oxygen indirectly...

Resource Type:

Dissertation
Functional relationships among songbirds, arthropods, and understory vegetation in Douglas-fir forests, western Oregon

Creator:

Hagar, Joan C.

Abstract:

Arthropods are important food resources for birds. Forest management activities can influence shrub-dwelling arthropods by affecting the structure and composition of understory shrub communities. Changes in abundance and species composition of arthropod communities in turn may influence the distribution and abundance of insectivorous birds. I examined relationships among bird abundance,...

Resource Type:

Dissertation

« Previous
Next »
1
2

Limit your search

Academic Affiliation

Forest Science[remove]26

Advisor

Sollins, Phillip3
Hibbs, David E.2
Molina, Randolph J.2
Rose, Robin2
Strauss, Steven H.2
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 2000 to 2007

View distribution

Committee Member

Cromack, Kermit5
Radosevich, Steve3
Ganio, Lisa2
Luoma, Dan2
Maguire, Doug2
more Committee Members »

Creator

Bergen, Scott1
Butler, Brett J.1
Carroll, Carlos1
Chen, Fen Hui1
Difazio, Stephen P.1
more Creators »

Date

Date range begin – Date range end

Current results range from 2000 to 2006

View distribution

Decade

2000-2009[remove]26

Degree Field

Forest Science26

Degree Level

Doctoral26

Degree Name

Doctor of Philosophy (Ph.D.)26

File Format

application/pdf2
image/jpeg1

Language

English [eng]26

Non-Academic Affiliation

Oregon State University. Graduate School26

Peer Reviewed

No22

Resource Type

Dissertation[remove]26

Rights Statement

Copyright Not Evaluated[remove]26

Subject

Douglas fir -- Ecology -- Oregon2
Forests and forestry -- Oregon2
Vegetation dynamics -- Oregon2
Agroforestry -- Thailand1
Amazon River Watershed1
more Subjects »

Scholars Archive is a service of Oregon State University Libraries & Press

121 The Valley Library
Corvallis, OR 97331-4501

Contact Us
Services for Persons with Disabilities

Powered by Hyrax 3.6.0

Copyright © 2018 Oregon State University
Licensed under the Apache License, Version 2.0

Core Trust application (pdf)