Index Catalog // ScholarsArchive@OSU

Dissolved nitrogen in surface waters and nitrogen mineralization in riparian soils within a multi-land use basin

Creator:: Evans, Daniel M.
Abstract:: The growing population of Oregon’s Willamette River Basin places an increasing demand on the basin’s surface waters. Watershed-scale research addressing spatial trends of dissolved nitrogen (DN) and its relationship with landuse and soil N dynamics, such as N mineralization, is sparse in the Willamette Basin. I measured DN along 124...
Resource Type:: Masters Thesis
Full Text:: riparian zones of the Calapooia River, Oregon.................... 57 3.3.3.3. Hardwood basal area at

Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

Creator:: Floyd, William C.
Abstract:: The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper Zone of the watershed, mixed forest and agriculture lands are found in the Middle Zone, and...
Resource Type:: Masters Thesis
Full Text:: . Calapooia River sample locations in the Calapooia Watershed, Oregon............... 113 B.1. Independent sub

Agricultural impacts on amphibian survival, growth, and distributions

Creator:: Baker, Nick J.
Abstract:: The potential impact of chemical contaminants and conservation practices on amphibians in agricultural landscapes is a key research topic globally. Amphibians represent a common group in many freshwater systems and are currently experiencing worldwide population declines. Global amphibian declines may be attributed to a number of causes, including habitat loss,...
Resource Type:: Masters Thesis
Full Text:: Calapooia watershed in Oregon……...………………………………… 32 2.2 Pond and stream site locations in Calapooia

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

Results and review of a riparian survey method used in eastern Oregon

Creator:: Rasmussen, Christine G.
Abstract:: In the late 1970s, approximately 400 miles of streams were inventoried by the Prineville District of the Bureau of Land Management for in-stream and riparian condition. During the summer of 1994, the riparian portion of the survey was repeated on 17 of the original streams miles, contained within 11 stream...
Resource Type:: Masters Thesis

Riparian canopy and channel response to hillslope disturbance in Elk River Basin, southwest Oregon

Creator:: Ryan-Burkett, Sandra E.
Abstract:: Elk River is a sixth order stream, draining a 200 square kilometer basin in the Klainath Mountain province of southwestern Oregon. Timber harvesting began in the basin during the 1950's, with peak removal of wood occurring in the mid to late 1960's. This activity lead to an increase in the...
Resource Type:: Masters Thesis

Application of stream classification and historical land uses for managed riparian systems of Eastern Oregon

Creator:: Zweygardt, Louanne R.
Abstract:: Twelve stream segments in the Silvies River drainage system were classified in the fall of 1993 and again in 1994, using a morphological classification of natural rivers (Rosgen 1994). Bankfull flow of stream channels is the key feature of this system. Measurement of bankfull is used in the calculation of...
Resource Type:: Masters Thesis
Full Text:: for managed riparian systems of Eastern Oregon AN ABSTRACT OF THE THESIS OF Louanne R. Zweygardt

Riparian cover changes associated with flow regulation and bank stabilization along the Upper Willamette River in Oregon between 1939 and 1996

Creator:: Gutowsky, Sharon L.
Abstract:: This study investigates riparian cover change between 1939 and 1996 utilizing aerial photography, bank conditions and stream gauge data. Three sites under 1.0 km2, along a 10- km reach north of Harrisburg, Oregon, were evaluated. The cover classification scheme included 18 classes composed of 3 canopy densities and 8 structural...
Resource Type:: Masters Thesis

Influences of riparian canopy on aquatic communities in high desert streams of eastern Oregon

Creator:: Tait, Cynthia K.
Abstract:: Because riparian canopy controls most energy inputs to stream ecosystems, it directly affects the structure of aquatic food webs and the ecological processes that govern interactions among trophic levels. This study addresses the interdependence among riparian canopy, benthic community structure, and the carrying capacity of high desert streams for salmonid...
Resource Type:: Dissertation
Full Text:: order tributaries of the John Day River in eastern Oregon included riparian areas ranging from denuded

Watershed-level patterns among stream amphibians in the Blue River watershed, West-Central Cascades of Oregon

Creator:: Hunter, Matthew G.
Abstract:: Most recent research on stream amphibians in the Pacific Northwest has focused on associations with reach-level or stand-level environmental features. Little is known about landscape-level distributions of these species or landscape-level aspects of their life-histories. I used a watershed-wide sample and logistic regression to develop models and maps of probability...
Resource Type:: Masters Thesis
Full Text:: Patterns among Stream Amphibians in the Blue River Watershed, West-Central Cascades of Oregon. Abstract

ScholarsArchive@OSU

Dissolved nitrogen in surface waters and nitrogen mineralization in riparian soils within a multi-land use basin

Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

Agricultural impacts on amphibian survival, growth, and distributions

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

Results and review of a riparian survey method used in eastern Oregon

Riparian canopy and channel response to hillslope disturbance in Elk River Basin, southwest Oregon

Application of stream classification and historical land uses for managed riparian systems of Eastern Oregon

Riparian cover changes associated with flow regulation and bank stabilization along the Upper Willamette River in Oregon between 1939 and 1996

Influences of riparian canopy on aquatic communities in high desert streams of eastern Oregon

Watershed-level patterns among stream amphibians in the Blue River watershed, West-Central Cascades of Oregon

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