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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 48 for “"stream habitat"”.
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Quantifying the Environmental Performance of a Stream Habitat Improvement Project
… worldwide to rehabilitate degraded river habitat. Many of these projects focus on stream habitat improvement (SHI), and an estimated 60%of the 37,000 projects listed in the National River Restoration Science Synthesis Program focus on SHI for salmon and trout species. These projects …
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Effects of Cattle Exclusion on Stream Habitat in the Shenandoah Valley, Virginia
Cattle exclusion from streams is believed to improve riparian vegetation, in-stream habitat, and composition of aquatic organisms. Yet research on the effects of cattle exclusion have yielded conflicting results. The goal of this study was to examine relationships between physical habitat and …
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CHARACTERIZATION OF VARYING LOCAL WINTER STREAM HABITAT AND ITS IMPACT ON COLDWATER FISHES
<p>Stream dwelling fish in temperate latitudes are subject to widely varying in-stream winter conditions. Understanding the relative importance of the different factors that contribute to these winter conditions is important in predicting how environmental shifts will affect fish communities. In …
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Decreasing stream habitat for Greenback cutthroat trout under future climate projections in headwater streams of the southern Rocky Mountains, Colorado
… pools. Many studies have shown that headwater streams are especially vulnerable to changing climate, and coldwater fish are especially sensitive to the fluctuations in streamflow and water temperature during summertime low flows. Though previous studies have provided insights on how changes in …
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Stream Habitat Characterized by Stage -Specific Flows and Three-Dimensional Geomorphological Complexity: Development of Ecological Criteria for Stream Restoration Design
In a low-gradient, third-order stream in East-Central Illinois, a new classification scheme for mesohabitat units was developed based on three-dimensional geomorphological complexity, and associated flow structures at low- and high-flow stages. In this two-tier classification scheme, the term …
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Effects of turbidity on the foraging abilities of brook trout (Salvelinus fontinalis) and smallmouth bass (Micropterus dolomieu)
… sedimentation has focussed on its effects on stream habitat and its ramification on the reproductive potential of fish. Although relatively large sediment loads may be necessary to alter stream habitat, only small loads are needed to raise mean stream turbidity levels. Turbidity may be an …
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Effects of Watershed and Habitat Conditions on Stream Fishes in the Upper Roanoke River Watershed, Virginia
I collected fish samples and habitat data at 43 sites throughout the upper Roanoke River watershed, Virginia. Sites were separated into three watershed areas size classes: 10 - 15, 20 - 30, and 70 - 80 km². I correlated physical in-stream conditions with proportions of forest, disturbed, and …
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Occupancy of Stream-Associated Amphibians within the Interstate 90 Snoqualmie Pass Corridor
Detection of stream-associated amphibians in visual encounter surveys is challenging due to their cryptic nature; however, occupancy models were developed to deal with these detectability problems and provide estimates of occupancy that can also be related to site characteristics. Highway crossing …
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Riparian Restoration, Success Criteria, and Application to the BART Sabrecat Creek Riparian Restoration Project in Fremont, California
… the watershed, surrounding land use, adjacent habitat, and riparian buffers; special-status species, endangered species, and habitat type and structure; invasive species control; water quality and hydrology; and soil and soil microbial communities. Three methods of evaluating restoration …
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Spatial population dynamics of brook trout (Salvelinus fontinalis) in a central Appalachian watershed
… (3) to determine if the spatial arrangement of stream habitat influence growth, residency, and population fluctuation rates. I used visual surveys and redd counts to quantify spatial variation in habitat quality and brook trout spawning activity. I conducted a mark-recapture study over four …
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The Role of Geomorphic Features and Hydrologic Processes on Sediment Clusters in Gravel-Bed Rivers, Washington: A Field-Based Approach
… transport processes, bed stability, and in- stream habitat conditions.</p>
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Channel Morphology and Riparian Vegetation Influences on Fluvial Aquatic Habitat
… has grown in recent years, the number of stream restoration activities has increased dramatically. Anthropogenic influences at a range of spatial scales from watershed landuse to riparian vegetation management to local channel morphology can have hierarchical relationships to local (meso- …
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The hydroecology of groundwater-fed streams in a glacierised catchment
Groundwater flow typically provides stable stream habitat within glacierised floodplains. However, spatio-temporal differences within and between groundwater flow pathways can create marked variability in the physicochemical characteristics of groundwater-fed streams. Research conducted on a …
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Perspectives on the Geomorphic Evolution and Ecology of Modified Channels and Two-Stage Ditches in the Agriculturally-Dominated Midwestern United States
… studies, we evaluate relationships between in-stream habitat, water chemistry, spatial distribution, and geomorphic features within a predominantly agricultural watershed in Ohio using Canonical Correspondence Analysis (CCA) and variance partitioning to relate environmental variables to fish …
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Influences of watershed urban development on habitat heterogeneity and native fish diversity in a ridge and valley stream in Southeastern Tennessee
… relationships of landscape features with instream environmental conditions and fish assemblage attributes in a third-order Ridge and Valley stream in the Chattanooga, Tennessee area. Stream water quality, habitat, and fish assemblages were sampled in May-June 2005 at seven sites (drainage …
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A macroinvertebrate bioassessment of two streams on Turnbull National Wildlife Refuge (TNWR)
<p>This project focused on highly impacted streams at Turnbull National Wildlife Refuge, Cheney, WA to evaluate the health status and ecosystem integrity of the water bodies. Turnbull National Wildlife Refuge contains over 3,000 acres of wetlands, and provides high quality habitat for migrating and …
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Using GIS and Land Use Data to Select Candidate Reference Sites for Stream Bioassessment
… by sub-ecoregion for a rapid bioassessment of streams statewide. Instead of relying on best professional judgment or previous knowledge of a limited number of sites, we performed an objective evaluation of cumulative impact on all catchments using land use data sets. These included road and …
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Effects of urbanization on instream habitat and fish assemblages in the chattanooga metropolitan area, Tennessee-Georgia
Twenty-one stream sites in the Ridge and Valley ecoregion of Tennessee and Georgia were studied in 2008 to evaluate the effects of watershed urbanization on instream environmental parameters and fish assemblages. I also investigated changes in urbanization and stream conditions at 10 sites over a …
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