Index Catalog // ScholarsArchive@OSU

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

Creator:: Sobota, Daniel J.
Abstract:: Land use alters the physical and biological structure of stream ecosystems and potentially alters their capacity to process nitrogen (N), an essential nutrient that has nearly doubled in abundance on the biosphere during the past century from human activities. In this dissertation, I quantified uptake and transformation of nitrate (NO₃⁻)...
Resource Type:: Dissertation
Full Text:: Willamette River Basin, Oregon.………………………...16 2. Riparian, geomorphic and hydrologic characteristics of

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

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

Analysis and prediction of patterns in lichen communities over the western Oregon landscape

Creator:: Peterson, Eric B.
Abstract:: The diverse lichen flora of the Pacific Northwest is being impacted by population growth and by forest management practices. Accumulating information about our lichen flora will improve our conservation strategies. This dissertation first collects information to improve our understanding of how lichen communities vary among forests of differing structure, and...
Resource Type:: Dissertation
Full Text:: the western Oregon landscape AN ABSTRACT OF THE DISSERTATION OF Eric B. Peterson for the degree of

Stand development after 20-years of growth in Douglas-fir and red alder mixtures

Creator:: Garrelts, Brennan T.
Abstract:: This study examines the long-term role of interference on stand development of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) and red alder (Alnus rubra Bong.) planted mixtures in the Central Cascades of Oregon, USA. The two species are common associates in naturally regenerated and planted conifer stands in the Pacific Northwest. Due...
Resource Type:: Masters Thesis
Full Text:: ) and red alder (Alnus rubra Bong.) planted mixtures in the Central Cascades of Oregon, USA. The two

Impacts of fuel reduction thinning treatments on oak and chaparral communities of southwestern Oregon

Creator:: Perchemlides, Keith A.
Abstract:: In response to concerns about excessive stand densities and high-severity wildfires, land managers in the western United States are carrying out extensive programs of fuel reduction thinning. How will these sudden reductions in canopy cover and associated changes in habitat affect native and exotic herbaceous vegetation and canopy species regeneration?...
Resource Type:: Masters Thesis

Patterns in understory vegetation communities across canopy gaps in young, Douglas-fir forests of western Oregon

Creator:: Fahey, Robert T.
Abstract:: Canopy gap formation is a major factor contributing to maintenance of overstory species diversity and stand structure in forests and may be integral to development of understory shrub and herb layers as well. Acknowledgement of gap formation as a fundamental feature of natural forests has led to consideration of gaps...
Resource Type:: Masters Thesis
Full Text:: forests of western Oregon. Forest Ecology and Management 112:289-302. 5 Battles, J. J., A

Four centuries of soil carbon and nitrogen change after severe fire in a Western Cascades forest landscape

Creator:: Giesen, Thomas William
Abstract:: Fire is a major disturbance process in many forests. Long-term studies of the biogeochemical effects of fires, especially on soils, are very rare. Consequently, long-term effects of fire on soils are often hypothesized from short-term effects. In a chronosequence study, I studied 24 western Cascades (Oregon) forest stands thought to...
Resource Type:: Masters Thesis
Full Text:: (Oregon) forest stands thought to have been initiated in fire. Twelve of those burned about 150 years

The use of burned forest by breeding birds following the Biscuit Fire in southwest Oregon

Creator:: Donaghy Cannon, Michelle M.
Abstract:: Fire severity is hypothesized as an important driver of bird responses to wildfire. For those species that typically respond negatively to increasing severity, Accessibility of high-severity burned forest may be dependent on the proximity of unburned or low-severity burned forest to meet all of the needs of breeding bird species...
Resource Type:: Dissertation
Full Text:: Biscuit Fire in Southwest Oregon. 1 AN ABSTRACT OF THE DISSERTATION OF Michelle M. Donaghy

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:: . Title: Chaparral History, Dynamics, and Response to Disturbance in Southwest Oregon: Insights from Age

ScholarsArchive@OSU

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

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

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

Analysis and prediction of patterns in lichen communities over the western Oregon landscape

Stand development after 20-years of growth in Douglas-fir and red alder mixtures

Impacts of fuel reduction thinning treatments on oak and chaparral communities of southwestern Oregon

Patterns in understory vegetation communities across canopy gaps in young, Douglas-fir forests of western Oregon

Four centuries of soil carbon and nitrogen change after severe fire in a Western Cascades forest landscape

The use of burned forest by breeding birds following the Biscuit Fire in southwest Oregon

Chaparral history, dynamics, and response to disturbance in southwest Oregon : insights from age structure

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