Index Catalog // ScholarsArchive@OSU

Climatic and physiographic controls on peakflow generation in the western Cascades, Oregon

Creator:: Perkins, Reed
Abstract:: Despite the importance of rain and snowmelt in causing peakflows in the Pacific Northwest, the interactive effects of a snowpack and watershed physiography on streamflow are largely undocumented. This study investigated the influence of soil and snowpack moisture on peakflow hydrograph shape in three small (< 60 ha) control sub-watersheds...
Resource Type:: Dissertation

Physical and chemical characteristics of riparian soils two third order streams in the western Cascades of Oregon

Creator:: Gillham, Marla L.
Abstract:: Study objectives were to survey and compare physical and chemical characteristics of soils within two thirdorder montane riparian ecosystems: a 500-year old Douglas fir (Pseudotsuga menzlesii) forest at Mack Creek, and a mature red alder (Alnus rubra) forest occupying a 35-year old clearcut at Quartz Creek, both near Blue River,...
Resource Type:: Masters Thesis

Denitrification potential in forest riparian soils of the western Oregon Cascades : spatial and temporal variation

Creator:: McClellan, Michael H.
Abstract:: Denitrification, the biological or chemical reduction of ionic nitrogen oxide or dinitrogen, has not been widely studied in forest ecosystems despite widespread interest in other facets of the forest nitrogen economy. This study had three main objectives: to determine whether potential for denitrification exists in forest riparian and hill slope...
Resource Type:: Masters Thesis

Forest management for the North American pine mushroom (Tricholoma magnivelare (Peck) Redhead) in the southern Cascade Range

Creator:: Weigand, James F.
Abstract:: Analysis of import trade since 1976 shows that forests of the Pacific Northwest provide Japan with the largest share of pine mushrooms (Tricholoma spp.) outside of East Asia. To determine whether North American pine mushrooms (Tricholoma magnivelare (Peck) Redhead) merit more intensive management in the southern Cascade Range, a major...
Resource Type:: Dissertation

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

Investigations of runoff production and sedimentation on forest roads

Creator:: Wemple, Beverley C.
Abstract:: Forest roads constructed in steep mountain landscapes have been associated with a number of effects on hydrologic and geomorphic processes. This research examined the effects of forest roads on the flow of water and sediment in drainage basins in the Cascade range of western Oregon. A study conducted at the...
Resource Type:: Dissertation

The effect of fire regime on coarse woody debris in the west central Cascades, Oregon

Creator:: Wright, Pamela J.
Abstract:: This study examined the effect of fire regime on coarse woody debris (CWD) mass using a combination of field data and modeling. The objectives were to use field sampling to determine how CWD differs between two areas that have had different fire regimes, and investigate how fire frequency and severity,...
Resource Type:: Masters Thesis
Full Text:: .............................................................................. 11 Fire North to South in the Cascade Range

Associations of forest floor vertebrates with coarse woody debris in managed forests, western Oregon Cascades

Creator:: Butts, Sally R.
Abstract:: Forest floor vertebrate species presence and abundance may be influenced by the volume and cover of coarse woody debris (CWD) in managed forests. I studied macro- and microhabitat associations of vertebrate species in 18 closed-canopy stands ranging in CWD volume from 14 to 859 m3/ha. Pitfall traps were used to...
Resource Type:: Masters Thesis

Habitat structure and occupancy patterns of the montane frog, Rana cascadae, in the Cascade Range, Oregon, at multiple scales : implications for population dynamics in patchy landscapes

Creator:: Brown, Catherine, 1958-
Abstract:: Associations between occupancy patterns of a montane anuran species, Rana cascadae, and habitat structure at multiple scales were examined to investigate how population structure may influence persistence in spatially and temporally heterogeneous environments. Predictions were based on population dynamics suggested by source-sink and metapopulation models. Potential sites in three basins...
Resource Type:: Masters Thesis
Full Text:: Occupancy Patterns of the Montane Frog. Rana cascadae. in the Cascade Range. Oregon. at Multiple Scales

Spatial analysis of Phellinus weirii infection centers in the central Cascades of Oregon : inferring ecological processes from patterns

Creator:: Lattin, Peter D.
Abstract:: This study was conducted to investigate why root disease centers east of the Cascade crest tend to be larger in diameter and more abundant than their counterparts to the west, within subalpine forest stands of central Oregon. The trend in a 290 km² study area appeared opposite of what was...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Climatic and physiographic controls on peakflow generation in the western Cascades, Oregon

Physical and chemical characteristics of riparian soils two third order streams in the western Cascades of Oregon

Denitrification potential in forest riparian soils of the western Oregon Cascades : spatial and temporal variation

Forest management for the North American pine mushroom (Tricholoma magnivelare (Peck) Redhead) in the southern Cascade Range

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

Investigations of runoff production and sedimentation on forest roads

The effect of fire regime on coarse woody debris in the west central Cascades, Oregon

Associations of forest floor vertebrates with coarse woody debris in managed forests, western Oregon Cascades

Habitat structure and occupancy patterns of the montane frog, Rana cascadae, in the Cascade Range, Oregon, at multiple scales : implications for population dynamics in patchy landscapes

Spatial analysis of Phellinus weirii infection centers in the central Cascades of Oregon : inferring ecological processes from patterns

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