Index Catalog // ScholarsArchive@OSU

Climate-growth relationships of western juniper and ponderosa pine at the pine-woodland ecotone in southern Oregon

Creator:: Knutson, Kevin C.
Abstract:: Pinyon-juniper woodlands throughout the western U.S. have expanded rapidly following European settlement during the late 19th century. In central and eastern Oregon, western juniper (Juniperus occidentalis var. occidentalis Hook.) encroachment has been previously documented in the sagebrush steppe and upper elevation aspen communities. While these vegetation changes and dynamics have...
Resource Type:: Masters Thesis
Full Text:: of Western Juniper and Ponderosa Pine at the Pine-Woodland Ecotone in Southern Oregon by

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

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:: of V e~tation and Disturbance on Fungal Communities in the Western Cascades of Oregon. Abstract

Ecology of Craterellus tubaeformis in western Oregon

Creator:: Trappe, Matthew James
Abstract:: Craterellus tubaeformis is a small to medium-sized forest mushroom that is fairly common in the Douglas-fir/western hemlock forests of the Pacific Northwestern United States and is most often associated with decayed coarse woody debris. In this study, the mycorrhizae of Craterellus tubaeformis in western Oregon is identified by DNA analysis...
Resource Type:: Masters Thesis
Full Text:: . Ecology of Craterellus tubaeformis in Western Oregon by Matthew James Trappe A THESIS submitted to

Denitrification and vegetative uptake in a pasture, poplar and native oak riparian buffer area

Creator:: Brown, Dina E.
Abstract:: Managing riparian buffer zones is a potentially important approach to protecting streams from agricultural pollution. This study was conducted to determine if a pasture, a hybrid poplar (Populus trichocarpa x deltoides) stand, or a native oak (Quercus garryana) forest, had the greatest potential to serve as a nutrient buffer zone....
Resource Type:: Masters Thesis
Full Text:: Valley riparian area of Oak Creek, near Corvallis, Oregon. Field and potential denitrification rates

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

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:: amphibians in 702 sample units in 16 randomly chosen drainages in the Oregon Coast Range. I used an

The use of ơ15N and ơ¹³C to analyze food webs and identify source-sink relationships in riparian canopy vegetation of the Oregon Coast Range

Creator:: Scott, Emily E.
Abstract:: In the Coast Range of western Oregon, some natural resource managers are converting red alder-dominated riparian areas to conifers to increase the future source of in-stream large wood for salmonid habitat. However, studies in Alaska have shown red alder-dominated riparian areas support greater invertebrate biomass compared to conifer-dominated areas. In...
Resource Type:: Masters Thesis

Functional relationships among vegetation, nocturnal insects, and bats in riparian areas of the Oregon Coast Range

Creator:: Ober, Holly K.
Abstract:: Vegetation provides food for many insects, and many insects serve as food for bats. We investigated the linkages among these three trophic levels in riparian areas throughout the Oregon Coast Range by examining the influence of vegetation cover, composition, and structure on the activity of nocturnal insects and bats, the...
Resource Type:: Dissertation
Full Text:: . L. Bower. 2001. Riparian forests in the Oregon Coast Range. Forest Ecology and Management 154: 201

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
Full Text:: Vegetation Removal in Coastal Oregon Douglas-fir Experimental Plantations: Impacts on Ecosystem Production

ScholarsArchive@OSU

Climate-growth relationships of western juniper and ponderosa pine at the pine-woodland ecotone in southern Oregon

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

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

Ecology of Craterellus tubaeformis in western Oregon

Denitrification and vegetative uptake in a pasture, poplar and native oak riparian buffer area

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

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

The use of ơ15N and ơ¹³C to analyze food webs and identify source-sink relationships in riparian canopy vegetation of the Oregon Coast Range

Functional relationships among vegetation, nocturnal insects, and bats in riparian areas of the Oregon Coast Range

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

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