Index Catalog // ScholarsArchive@OSU

Fire history, fire regimes, and development of forest structure in the central western Oregon Cascades

Creator:: Weisberg, Peter J.
Abstract:: Fire history and fire regimes were reconstructed for a 450 km² area in the central western Oregon Cascades, using tree-ring analysis of fire scars and tree origin years at 137 sampled clearcuts. I described temporal patterns of fire frequency, severity, and size, and interpreted topographic influences on fire frequency and...
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

Flux of ground water and nitrogen through the floodplain of a fourth-order stream

Creator:: Wondzell, Steve
Abstract:: Changes in the concentrations of dissolved ammonia (NH4+1), nitrate (NO3-1), organic nitrogen (DON) were monitored along ground water flow paths to determine the importance of the ground water system to the stream nitrogen budget. The study site was located on a wide floodplain along a fourth-order stream in the Oregon...
Resource Type:: Dissertation

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Creator:: Tepley, Alan J.
Abstract:: Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
Resource Type:: Dissertation
Full Text:: approved: _____________________________________________________________________ Frederick J

Streamflow and bedload transport in an obstruction-affected, gravel-bed stream

Creator:: Smith, Richard D. (Richard Dean), 1950-
Abstract:: The mechanisms of pool maintenance were investigated in a small (width = 10 m, drainage area = 18 km2), gravel-bed stream where pools are commonly associated with large, in-channel obstructions. Measurements of boundary shear stress, scour and fill of the stream bed, and bedload transport rate and grain-size distribution were...
Resource Type:: Dissertation

Infiltration, soil erosion, nitrogen loss and soil profile characteristics of Oregon lands occupied by three subspecies of Artemisia tridentata

Creator:: Swanson, Sherman R.
Abstract:: Infiltration, soil erosion, nitrogen loss and soil profile characteristics were measured on 36 sites representing land occupied by Artemisia tridentata ssp. tridentate, wyomingensis, and vaseyana. Infiltration, soil erosion, and nitrogen loss were strongly correlated but highly variable. Soil loss, but not infiltration or nitrogen loss was significantly different between subspecies....
Resource Type:: Dissertation
Full Text:: . Swanson AN ABSTRACT OF THE THESIS OF for the degree of Doctor of Philosophy in Rangeland Resources

Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

Creator:: Halofsky, Jessica E.
Abstract:: Fire is the dominant disturbance process in western U.S. forests, and although effects of fire in upland forests are relatively well-studied, there is little information about fire effects on riparian forests, critical areas of the landscape for both habitat and water quality. This dissertation examines different aspects of fire effects...
Resource Type:: Dissertation
Full Text:: sideslope Douglas-fir forests. Forest Ecology and Management 175:31-47. Gregory, S. V., F. J. Swanson

Mixed-Severity Fire Effects on Biological Legacies and Vegetation Response in Pseudotsuga Forests of Western Oregon's Central Cascades, USA

Creator:: Dunn, Christopher J.
Abstract:: Mixed-severity fire occurrence is increasingly recognized in Pseudotsuga forests of the Pacific Northwest, but questions remain about how tree mortality varies, and forest structure is altered, across the disturbance gradient observed in these fires. Therefore, we sampled live and dead biological legacies at 45 one ha plots, with four 0.10...
Resource Type:: Dissertation
Full Text:: Forestry. Dr. Frederick J. Swanson deserves my greatest and upmost respect for helping me develop my

Role of hypothalamic biogenic amines in the release of luteinizing hormone in the ewe

Creator:: Wheaton, Jonathan Edward
Abstract:: The role of hypothalamic biogenic amines (norepinephrine, dopamine and serotonin) in regulating the release of luteinizing hormone (LH) in the ewe was investigated. Eleven experiments utilizing mature crossbred or Hampshire ewes were conducted to determine the ability of exogenous 17β-estradiol and various pharmacological agents to alter the levels of hypothalamic...
Resource Type:: Dissertation

Optimizing Reservoir Operations to Adapt to 21st Century Expectations of Climate and Social Change in the Willamette River Basin, Oregon

Creator:: Moore, Kathleen M.
Abstract:: Reservoir systems in the western US are managed to serve two main competing purposes: to reduce flooding during the winter and spring, and to provide water supply for multiple uses during the summer. Because the storage capacity of a reservoir cannot be used for both flood damage reduction and water...
Resource Type:: Dissertation
Full Text:: Swanson, and Andreas Schmittner for taking an interest in my research and for providing constructive

ScholarsArchive@OSU

Fire history, fire regimes, and development of forest structure in the central western Oregon Cascades

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

Flux of ground water and nitrogen through the floodplain of a fourth-order stream

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Streamflow and bedload transport in an obstruction-affected, gravel-bed stream

Infiltration, soil erosion, nitrogen loss and soil profile characteristics of Oregon lands occupied by three subspecies of Artemisia tridentata

Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

Mixed-Severity Fire Effects on Biological Legacies and Vegetation Response in Pseudotsuga Forests of Western Oregon's Central Cascades, USA

Role of hypothalamic biogenic amines in the release of luteinizing hormone in the ewe

Optimizing Reservoir Operations to Adapt to 21st Century Expectations of Climate and Social Change in the Willamette River Basin, Oregon

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