Index Catalog // ScholarsArchive@OSU

The effects of water withdrawals on the emergence timing, adult body mass, and total emerging biomass of aquatic insects from two northeast Oregon rivers

Creator:: Brown, Phil D.
Abstract:: Small low-head diversion dams are capable of removing much of the flow of a river, often resulting in increased water temperatures and habitat loss. Warmer temperatures have been shown to accelerate aquatic invertebrate growth and development, and discharge reductions can reduce instream habitat, suggesting that water withdrawals may alter both...
Resource Type:: Masters Thesis
Full Text:: during the summer of 2006 on the Umatilla and Walla Walla rivers of northeastern Oregon. Multiple

Evaluating benthic macroinvertebrates as bio-indicators of freshwater habitat quality in an eastern Oregon agro-ecosystem

Creator:: Scherr, Melissa A.
Abstract:: The effect of anthropogenic disturbance on river systems is gaining attention, and concerns about the state of freshwater natural resources are increasing globally, as are efforts to restore habitat that has been degraded by disturbance. In rivers, non-point source pollution affects the physical characteristics of the habitat and the endemic...
Resource Type:: Dissertation
Full Text:: my research studies, lending his knowledge of river ecosystems and the ecology of the Umatilla

Summertime stream temperatures in the North and South Forks of the Sprague River, south central Oregon

Creator:: Friedrichsen, Paul T.
Abstract:: The Upper Sprague River Watershed (North and South Forks of the Sprague River) in south central Oregon provides important habitat for salmonid species, including native bull trout (Salvelinus confluentus) and redband trout (Oncorhynchus mykiss ssp.). Concern over the loss of viable habitat for these species has increased due to reductions...
Resource Type:: Masters Thesis
Full Text:: within the North and South Fork Sprague River Watersheds in South-Central Oregon 23 Monthly

Geomorphic influences on habitat formation, distribution, and development and the classification of upland coastal Oregon streams

Creator:: Hurley, Michael D.
Abstract:: A framework is presented for a more causal explanation and ordering of stream characteristics than traditional means have used. Patterns of stream habitat distribution are related to particular characteristics of the geomorphology of watersheds. Variability in stream characteristics can be explained by the spatial distribution of properties of the watershed...
Resource Type:: Masters Thesis
Full Text:: , and development and the classification of upland coastal Oregon streams AN ABSTRACT OF THE THESIS OF

Spatial and temporal dynamics of sediment and wood in headwater streams in the central Oregon Coast Range

Creator:: May, Christine L.
Abstract:: Channels that were scoured to bedrock by debris flows provided unique opportunities to calculate the rate of sediment and wood accumulation, to make inferences about processes associated with input and transport of sediment, and to gain insight into the temporal succession of channel morphology following disturbance. In an intensive investigation...
Resource Type:: Dissertation
Full Text:: Temporal Dyi-iamics of Sediment and Wood in Headwater Streams in the Oregon Coast Range. Abstract

Demonstration of fiber optic distributed temperature sensing to differentiate cold water refuge between ground water inflows and hyporheic exchange

Creator:: Collier, Michael W.
Abstract:: Recent developments in Distributed Temperature Sensing (DTS) have allowed new insight into the surface-to-ground water interaction. The continuous temperature measurement by the DTS allows for cool water inflows to be located during warm summer months. These cool water inflows can then be differentiated between ground water and hyporheic exchange. The...
Resource Type:: Masters Thesis
Full Text:: .................................................................... 24 3.2 Detailed Milton-Freewater quadrangle, Oregon – Umatilla Co., 7.5 minute series

Meander scars : reflections on healing a river

Creator:: Metzger, Abby P.
Abstract:: As Europeans settled the Willamette Valley in the 1800s, they began to simplify Oregon's largest river contained wholly within state boarders—the Willamette. The river lost miles of channels from dikes, dams, and development. Some channels vanished under concrete. Others became meander scars, or shallow, dry depression in the land where...
Resource Type:: Masters Thesis
Full Text:: in stream ecology, I warn the Oregon pioneers about the dangers that come with filling in side

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

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, USA……………….59 11. (A) Mean daily discharge and temperature and (B) stream

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

ScholarsArchive@OSU

The effects of water withdrawals on the emergence timing, adult body mass, and total emerging biomass of aquatic insects from two northeast Oregon rivers

Evaluating benthic macroinvertebrates as bio-indicators of freshwater habitat quality in an eastern Oregon agro-ecosystem

Summertime stream temperatures in the North and South Forks of the Sprague River, south central Oregon

Geomorphic influences on habitat formation, distribution, and development and the classification of upland coastal Oregon streams

Spatial and temporal dynamics of sediment and wood in headwater streams in the central Oregon Coast Range

Demonstration of fiber optic distributed temperature sensing to differentiate cold water refuge between ground water inflows and hyporheic exchange

Meander scars : reflections on healing a river

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

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

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

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