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Filtering by: Creator United States. Forest Service. North Pacific Region Remove constraint Creator: United States. Forest Service. North Pacific Region Committee Member McCune, Bruce Remove constraint Committee Member: McCune, Bruce Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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Epidemic Dynamics of Sudden Oak Death in the Forests of Oregon

Creator:

Carson, Adam

Abstract:

Sudden Oak Death (SOD) is a forest disease caused by the oomycete pathogen Phytophthora ramorum, and infects trees in the Western United States and Europe. This generalist pathogen can infect over 130 species of plants, and causes rapid mortality in tree species in the Fagaceae. Sexual reproduction is thought to...

Resource Type:

Masters Thesis

Full Text:

suitability for establishment of Phytophthora ramorum within the contiguous United States. Forest Ecology
The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Creator:

Holub, Scott M.

Abstract:

Forests in the Pacific Northwest receive very little nitrogen through atmospheric deposition and thus studying the nitrogen cycle in this region can provide insights into how the unpolluted nitrogen cycle functions. I examined the fate of organic nitrogen versus inorganic nitrogen and the effect of tamlins on N retention by...

Resource Type:

Dissertation

Full Text:

W. Stone, the Hi. Andrews working group, USDA-Forest Service Pacific Northwest Region Air Resources
Understory herb and shrub responses to root trenching, pre-commercial thinning, and canopy closure in Douglas-fir forest of the western Cascades, Oregon

Creator:

Lindh, Briana C.

Abstract:

This thesis examines factors limiting understory herb presence and flowering in young second-growth Douglas-fir (Pseudotsuga menziesii) forests on the west side of the Cascade Mountains, Oregon, USA. I studied the belowground effects of canopy trees on understory herbs and shrubs in old-growth forests using trenched plots from which tree roots...

Resource Type:

Dissertation

Full Text:

USDA Forest Service Blue River Ranger District provided maps, historical records, advice and
Characterization of fungal and bacterial communities associated with mat-forming ectomycorrhizal fungi from old-growth stands in the H.J. Andrews Experimental Forest

Creator:

Hesse, Cedar N.

Abstract:

Mat-forming ectomycorrhizal (EcM) fungi represent a prevalent constituent of many temperate forest ecosystems and create dramatic changes in soil structure and chemistry. EcM mat soil have been shown to have increased microbial respiration rates and have been hypothesized to harbor unique assemblages of fungi and bacteria. The objectives of this...

Resource Type:

Dissertation

Full Text:

. Andrews Experimental Forest Abstract approved
Effects of variation in ecosystem carryover on biodiversity and community structure of forest floor bryophytes and understory vascular plants : a retrospective approach

Creator:

Traut, Bibit Halliday

Resource Type:

Masters Thesis

Full Text:

National Forest managers in the Pacific Northwest are faced with the task of simultaneously harvesting
Stand structures of Oregon white oak (Quercus garryana) woodlands and their relationships to the environment in southwestern Oregon

Creator:

Gilligan, Laurie A.

Abstract:

Large areas of non-coniferous communities in southwestern Oregon are thinned to reduce fire hazard and accomplish ecosystem restoration, under the assumption that current fuel loads are unnaturally high. Although Oregon white oak (Quercus garryana) woodlands are a characteristic landscape component in this region, little is known about their current or...

Resource Type:

Masters Thesis

Full Text:

characteristic landscape component in this region, little is known about their current or historical stand
Biological Soil Crusts of the Great Basin : An Examination of their Distribution, Recovery from Disturbance and Restoration

Creator:

Condon, Lea A.

Abstract:

We are at risk of losing the sagebrush steppe in the floristic Great Basin to the invasion of Bromus tectorum L., cheatgrass. The floristic Great Basin includes the Central Basin and Range, the Northern Basin and Range, and the Snake River Plain. The Great Basin receives most of its precipitation...

Resource Type:

Dissertation

Full Text:

. RMRS-GTR-326. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain
Pendent Usnea (Lichens; Ascomycetes; Parmeliaceae) in Western Oregon : taxonomy; morphological characters; and geographical distribution

Creator:

Pittam, Sherry K.

Abstract:

Pendent Usnea species were collected in western Oregon and examined. Character states, such as cortex-medulla-axis ratio; fibril length; papilla diameter; branching patterns; and presence or absence of fibrils, papillae, soredia, isidia; plus chemistry, were recorded and analyzed by inspection for differences. Historical names were researched in the literature. A comparison...

Resource Type:

Masters Thesis

Full Text:

first study of North American Usnea that dealt with species in the Pacific Northwest. Even though his
The Role of Intraspecific Functional Trait Variation in the Differential Decline of Meadow Species Following Conifer Encroachment

Creator:

Celis, Jessica

Abstract:

In the Oregon Cascade Range, conifer encroachment has reduced the extent of mountain meadows by as much as 50% since the mid-1940s. Although encroachment results in a general decline of meadow species abundance and diversity, species differ in their sensitivities to encroachment: some show rapid declines whereas others persist in...

Resource Type:

Masters Thesis

Full Text:

encroachment states. For each species we estimated cover and light availability at multiple locations
Chaparral history, dynamics, and response to disturbance in southwest Oregon : insights from age structure

Creator:

Duren, Olivia

Abstract:

Fuels management on Bureau of Land Management lands in SW Oregon, USA, is motivated by the needs to reduce fire hazard and restore ecosystems thought to be impacted by fire suppression. Chaparral is one of the most characteristic vegetation communities of SW Oregon's interior valleys, and extensive acreages within this...

Resource Type:

Masters Thesis

Full Text:

A THESIS submitted to Oregon State University in partial fulfillment of the

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Academic Affiliation

Botany and Plant Pathology11

Advisor

Muir, Patricia S.3
Denison, William C.1
Jones, Andrew1
Kaye, Thomas N.1
Lajtha, Kate1
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1995 to 2023

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Committee Member

McCune, Bruce[remove]11
Acker, Steve1
Arp, Daniel J.1
Bailey, John1
Bond, Barbara1
more Committee Members »

Creator

Blakeley Smith, Matthew R.1
Carson, Adam1
Celis, Jessica1
Condon, Lea A.1
Duren, Olivia1
more Creators »

Date

Date range begin – Date range end

Current results range from 1994 to 2022

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Decade

2020-20291
2010-20194
2000-20094
1990-19992

Degree Field

Botany and Plant Pathology[remove]11

Degree Level

Master's7
Doctoral4

Degree Name

Master of Science (M.S.)7
Doctor of Philosophy (Ph.D.)4

Language

English [eng]11

License

All rights reserved8

Non-Academic Affiliation

Oregon State University. Graduate School10

Peer Reviewed

No11

Resource Type

Masters Thesis7
Dissertation4

Rights Statement

In Copyright9
Copyright Not Evaluated2

Subject

Ascomycetes -- Oregon -- Classification1
Atheliaceae -- Oregon -- H.J. Andrews Experimental Forest1
Bryophytes -- Ecology -- Oregon1
Ceanothus -- Effect of fires on -- Oregon -- Applegate River Watershed1
Ceanothus -- Effect of grazing on -- Oregon -- Applegate River Watershed1
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