Index Catalog // ScholarsArchive@OSU

Spatial and temporal dynamics of the Douglas-fir bark beetle (Dendroctonus pseudotsugae, Hopk.) in the Detroit Ranger District, Oregon : a landscape ecology perspective

Creator:: Powers, Jennifer Sarah
Abstract:: I developed a conceptual model of Douglas-fir bark beetle dynamics and associated host mortality across spatial and temporal scales. I proposed that a hierarchy of factors influence host resistance to attack at different spatial scales. I then tested this model by measuring the association between the occurrence of beetle-kill and...
Resource Type:: Masters Thesis
Full Text:: Willamette National Forest 1956-1992 76 4.3 Beetle kill (trees), precipitation, and windstorms in the

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Creator:: York, Melissa M.
Abstract:: Small remnants of 'natural' habitats exist today throughout much of the world. Upland prairies in the Willamette Valley, Oregon have been nearly eliminated by conversion to agriculture and other uses. As a result, very few prairies remain and at least four butterfly species that require this habitat appear to be...
Resource Type:: Masters Thesis
Full Text:: collected at 17 sites in the Willamette Valley, Oregon, 2000 107 Relationship Between Plant and Butterfly

Meadow classification in the Willamette National Forest and conifer encroachment patterns in the Chucksney-Grasshopper meadow complex, Western Cascade Range, Oregon

Creator:: Dailey, Michele Meadows
Abstract:: This study delineates and characterizes the distribution of montane meadows in the Willamette National Forest, identifies encroachment patterns in relation to topographic features and proximity to trees in the Chucksney-Grasshopper meadow complex, and examines tree species and age distributions in relation to distance from forest edges or isolated tree clusters...
Resource Type:: Masters Thesis
Full Text:: of meadows within the Willamette National forest and explore the relationship between meadow

Small mammal relationships with downed wood and antelope bitterbrush in ponderosa pine forests of central Oregon

Creator:: Smith, Troy G.
Abstract:: Downed wood and antelope bitterbrush (Purshia tridentata) are often managed on federal ponderosa pine (Pinus ponderosa) forests in central Oregon to prevent catastrophic wildfires and provide wildlife habitat. However, although much is known regarding the roles of downed wood and bitterbrush in wildfire behavior, little is known regarding the relationships...
Resource Type:: Masters Thesis

Soil variability on steep, skeletal forested slopes of the Umpqua National Forest, Oregon

Creator:: Myhrum, Ronald P.
Abstract:: This study was undertaken to determine both the amount and the spatial variability of sand, silt, clay, and six fractions of coarse fragments in soils representing harsh sites for reforestation. Particle size data were collected because of their direct relationship to water holding capacity and the plantability and survivability of...
Resource Type:: Masters Thesis
Full Text:: Umpqua National Forest, Oregon AN ABSTRACT OF THE THESIS OF Ronald P. Myhrum for the degree of Master

Early forest succession following clearcuts in western Oregon : patterns and abiotic controls

Creator:: Yang, Zhiqiang
Abstract:: Historical aerial photos were used to examine the early phase of forest succession after stand replacement disturbance, covering the Coast Ranges Province (CRP) and the western Cascades Province (WCP) of western Oregon. The study consisted of two components: characterizing the pattern of forest succession in western Oregon; analyzing the influence...
Resource Type:: Dissertation

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:: a Central Oregon Mixed-Conifer Forest Abstract approved: Gregory M. Filip White and grand fir are

Lakes of the Willamette

Creator:: United States. Forest Service
Abstract:: Gerald W. Williams Collection
Resource Type:: Book
Full Text:: Willamette National Forest, covering 1,600,000 acres along the west- ern slopes of the Cascade Mountains, has

A handful of trails : Willamette National Forest

Creator:: United States. Forest Service. Pacific Northwest Region
Abstract:: The trails included in this book will lead you to mountain-top vistas, lakes, waterfalls and old-growth forests, towering secondgrowth forests, rocky bluffs and alpine meadows. We've included a variety of trails: • short walks for those seeking fresh air and a place to stretch their legs • medium length trails...
Resource Type:: Book
Full Text:: Willamette National Forest Supervisor's Office 211 E. Seventh Avenue P.O. Box 10607 Eugene, Oregon

Plant association and management guide for the Pacific silver fir zone : Mt. Hood and Willamette National Forests

Creator:: Hemstrom, Miles A. and United States. Forest Service. Pacific Northwest Region
Resource Type:: Technical Report

ScholarsArchive@OSU

Spatial and temporal dynamics of the Douglas-fir bark beetle (Dendroctonus pseudotsugae, Hopk.) in the Detroit Ranger District, Oregon : a landscape ecology perspective

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Meadow classification in the Willamette National Forest and conifer encroachment patterns in the Chucksney-Grasshopper meadow complex, Western Cascade Range, Oregon

Small mammal relationships with downed wood and antelope bitterbrush in ponderosa pine forests of central Oregon

Soil variability on steep, skeletal forested slopes of the Umpqua National Forest, Oregon

Early forest succession following clearcuts in western Oregon : patterns and abiotic controls

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

Lakes of the Willamette

A handful of trails : Willamette National Forest

Plant association and management guide for the Pacific silver fir zone : Mt. Hood and Willamette National Forests

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