Index Catalog // ScholarsArchive@OSU

Historical changes in stream habitats in the Columbia River basin

Creator:: McIntosh, Bruce A.
Abstract:: Knowledge of how stream habitats change over time in natural and human-influenced ecosystems at large, regional scales is currently limited. A historical stream survey (1934-1945) was compared to current surveys to assess changes in poo1 habitats in the Columbia River basin. Streams from across the basin, representing a wide range...
Resource Type:: Dissertation

Characterization of organic matter quality and content in Columbia River suspended particulate matter by cupric oxide oxidation

Creator:: Alleau, Yvan M.
Abstract:: The organic content of the Columbia River suspended particulate matter (SPM) results from the input of autochthonous (phytoplankton) and allochthonous (terrestrial vascular plants) production. The contribution of these two sources appears seasonal and responds to factors such as rainfall, runoff, river flow, light and nutrients availability. While numerous studies have...
Resource Type:: Masters Thesis
Full Text:: 1 METHODS 7 2.1 Sampling 7 2.1.1 Sample Collection 7 2.1.2 The Columbia River Watershed 7 2.1.3

Resilience of large river basins : applying social-ecological systems theory, conflict management, and collaboration on the Mekong and Columbia Basins

Creator:: MacQuarrie, Patrick R.
Abstract:: River basins provide essential services for both humans and ecosystems. Understanding the connections between ecosystems and society and their function has been at the heart of resilience studies and has become an increasing important endeavor in research and practice. In this dissertation, I define basin resilience as a river basin...
Resource Type:: Dissertation
Full Text:: development in the Mekong and Columbia River Basins. This dissertation answers the following questions: 1

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:: 24-hr releases of 15N-labeled NO3 - in nine stream reaches in the Willamette River Basin of western

Effects of harvest and roads on in-stream wood abundance in the Blue River Basin, western Cascades, Oregon

Creator:: Czarnomski, Nicole M.
Abstract:: Despite many studies of large wood in streams, few landscape scale studies have been conducted. Large-scale studies can reveal how the history of forest harvest and road building has influenced wood patterns in streams of the Pacific Northwest. This study examined the relationships between wood in streams, timber harvest, and...
Resource Type:: Masters Thesis
Full Text:: Harvest and Roads on In-stream Wood Abundance in the Blue River Basin, Western Cascades, Oregon

Historical changes in anadromous fish habitat in the Upper Grande Ronde River, Oregon, 1941-1990

Creator:: McIntosh, Bruce A.
Abstract:: The U.S. Bureau of Fisheries (now National Marine Fisheries Service) conducted stream habitat surveys in the Upper Grande Ronde River Basin in 1941. This survey was part of an extensive inventory of stream habitat conditions for anadromous salmonids (Oncorhynchus spp.) throughout the Columbia River Basin. The survey systematically inventoried 158...
Resource Type:: Masters Thesis

Fish and amphibian use of intermittent streams within the upper Willamette Basin, Oregon

Creator:: Colvin, Randall William
Abstract:: In the fall through spring of 2002/03 and 2003/04, the composition of fish and amphibian communities were examined in intermittent streams in the upper Willamette river basin in western Oregon. I recorded standard aquatic habitat variables and water nutrient concentrations (nitrate and phosphate) and correlated them with fish and amphibian...
Resource Type:: Masters Thesis
Full Text:: 30,000 km2 of the watershed into the lower Columbia River (Greenburg and Welch, 1998). The basin is

The spatial and temporal variability of nitrate in streams of the Bull Run Watershed, Oregon

Creator:: Bakke, Paul D.
Abstract:: An 18-year record of nitrate (NO₃), orthophosphate, total nitrogen and total phosphorus in four streams of the Bull Run watershed, Oregon, was examined to determine its precision and time resolution. Of these four species, only NO₃ was found to be known to a sufficient level of detail for modeling and...
Resource Type:: Masters Thesis

Beaver ecology in Bridge Creek, a tributary to the John Day River

Creator:: Maenhout, Julie L. (Harper)
Abstract:: The American beaver (Castor canadensis) was nearly extirpated by the late 1800's due to the fur trade. Due to reintroduction efforts, it now occupies much of its former range. Beavers are a keystone species and ecosystem engineers, greatly influencing riparian and instream habitats through selective harvesting of plant materials and...
Resource Type:: Masters Thesis
Full Text:: Beaver Ecology in Bridge Creek, a Tributary to the John Day River by Julie L. Maenhout A THESIS

Effects of wildfire on growth and demographics of coastal cutthroat trout in headwater streams

Creator:: Heck, Michael P.
Abstract:: Wildfire is a largely terrestrial perturbation broadly recognized as an agent of disturbance and ecological change in forested biomes. Effects of post-fire conditions on biotic components of aquatic systems have been less well-documented, although hypothetically, the two are strongly connected. In fact, the influence of wildfire may be most profound...
Resource Type:: Masters Thesis
Full Text:: reference stream was selected from a nearby fourth watershed. All fish-bearing portions of the stream

ScholarsArchive@OSU

Historical changes in stream habitats in the Columbia River basin

Characterization of organic matter quality and content in Columbia River suspended particulate matter by cupric oxide oxidation

Resilience of large river basins : applying social-ecological systems theory, conflict management, and collaboration on the Mekong and Columbia Basins

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

Effects of harvest and roads on in-stream wood abundance in the Blue River Basin, western Cascades, Oregon

Historical changes in anadromous fish habitat in the Upper Grande Ronde River, Oregon, 1941-1990

Fish and amphibian use of intermittent streams within the upper Willamette Basin, Oregon

The spatial and temporal variability of nitrate in streams of the Bull Run Watershed, Oregon

Beaver ecology in Bridge Creek, a tributary to the John Day River

Effects of wildfire on growth and demographics of coastal cutthroat trout in headwater streams

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