Global ETD Search
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 24 for “"large woody debris"”.
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Relations between large woody debris, physical habitat, and benthic macroinvertebrates in Appalachian mountain streams
Large woody debris (LWD) was added to North Fork Stony Creek and North Prong Barbours Creek as an experimental stream enhancement technique. The purpose of this study was to determine the stream channel responses to LWD additions at the scale of the stream reach and around individual logs, to …
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The Role of Large Woody Debris in the Dynamics of a Low-Energy Meandering Stream in the Midwest
*This dissertation is compound (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.
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Short-term response of physical habitat and fish to the addition of large woody debris in two Appalachian Mountain streams
Large woody debris (LWD) was added to North Fork Stony Creek and North Prong Barbours Creek in southwest Virginia to inlprove fish habitat. The purposes of this study were to monitor stream channel response to the addition of LWD at a stream reach scale and at a local scale around individual logs, …
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Fish-Habitat Associations in Small Backwaters of the Upper Missouri River, North Dakota
… m. One third of backwaters sampled contained woody debris greater than 0.1 m in diameter, and 71 % contained macrophytes. Amounts of large woody debris and water temperature differed significantly among backwaters located in the tailrace, middle and lower river segments of the Garrison Reach. …
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Factors Influencing the Distribution of Bull Trout and Westslope Cutthroat Trout West of the Continental Divide in Glacier National Park
… factors (stream width, elevation, gradient, large woody debris density, pool density, mean August stream temperature) and a biotic factor (the presence of nonnative lake trout, Salvelinus namaycush) with the occurrence and density of bull trout and westslope cutthroat trout in 79 stream …
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Factors Influencing the Distribution of Bull Trout and Westslope Cutthroat Trout West of the Continental Divide in Glacier National Park
… factors (stream width, elevation, gradient, large woody debris density, pool density, mean August stream temperature) and a biotic factor (the presence of nonnative lake trout, Salvelinus namaycush) with the occurrence and density of bull trout and westslope cutthroat trout in 79 stream …
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Quantifying Channel Responses to the Removal of the Glines Canyon Dam in the Middle Reach of the Elwha River, Washington
… river to trap and accumulate the new influx of woody debris and sediment from the dam removal, which influenced the response of the river channel. The change that occurred was quantified by using repeat Terrestrial LiDAR (TLS), sediment distribution surveys, and large woody debris mapping …
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Public attitudes towards the effects of land use on coldwater ecosystems
… the effects of land use on dissolved oxygen and large woody debris. This coincides with disagreement among researchers and an increase in research of these topics. Disagreement among groups also concerned the effects of farming on trout food supply, presumably because of the complex interactions …
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Land Use and River Systems: Impacts of Suburban Residential Development on Channel Stability and Water Supply, Oak Ridges Moraine, Southern Ontario
… vegetation cover, quantification of large woody debris, and visual assessment, allowing for inferences about potential downstream bank degradation symptomatic of streams in urban areas. Hydrology was evaluated using continuously measured water level and empirically estimated …
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Geology, surface hydrology, and fish habitat relationships in the upper Shavers Fork drainage basin, West Virginia
… and the highest relative abundance of large woody debris (LWD).;In-stream heterogeneity dominates pools and channel-unit complexes, which comprise 69 percent of the total stream area. In-stream homogeneity dominates riffles and glides which constitute 31 percent of the total stream area.
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Evaluation of Red Alder Mortality in the Little Creek Watershed Following the 2009 Lockheed Fire
… on selected trees. An estimation of red alder large woody debris (LWD) input to Little Creek since a 2010 LWD survey (Smith, 2010) was calculated using average red alder tree dimensions applied to Smalian’s formula (MLNRO, 2011). The mean proportion of dead red alder in the non-burn zone and …
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THE EFFECTIVENESS OF TROUT HABITAT RESTORATION IN EUSTACHE CREEK, A FORMERLY PLACER-MINED STREAM IN WESTERN MONTANA
… (based on site area), residual pool depth, large woody debris per 100 meters, large woody debris median diameter and percent fine sediment in pool tails. A repeated measures ANOVA model was used to detect significant increases in habitat quality and fish populations over the four-year period …
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THE EFFECTIVENESS OF TROUT HABITAT RESTORATION IN EUSTACHE CREEK, A FORMERLY PLACER-MINED STREAM IN WESTERN MONTANA
… (based on site area), residual pool depth, large woody debris per 100 meters, large woody debris median diameter and percent fine sediment in pool tails. A repeated measures ANOVA model was used to detect significant increases in habitat quality and fish populations over the four-year period …
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Watershed and Streamside Management Zone Characterization in the Allegheny Plateau of West Virginia
… was approximately equal at 28 and 33 m3/ha. Large woody debris was more decayed in the SMZ than in-stream LWD.
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Detecting Change in Central California Coast Coho Salmon Habitat in Scotts Creek, California, from 1997–2013
… by major tributary junctions. Although a large woody debris (LWD) survey was not conducted as part of the 1997 survey, contrasting our results with data collected during intervening years indicated that instream LWD has become more abundant, primarily due to increases in hard-wood species …
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Himalayan Blackberry (Rubus armeniacus) Effects on Fish Habitat: Impacts from Riparian Zones Inundated with Himalayan Blackberry
… that provides rearing habitat for fish (large woody debris (LWD) habitat and residual pool habitat). I hypothesized that each fish habitat quality indicator would show lower quality in the test sites compared to the reference sites. My findings indicate that test sites had lower canopy …
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Benthic Macroinvertebrate Community Responses to a Headwater Valley Restoration at Slabcamp Creek, Rowan Co., Kentucky
… to White Pine Branch, Slabcamp Creek had more large woody debris, less canopy cover, and greater amounts of fine sediments and no bedrock. Macroinvertebrates were collected from five riffles in each stream with a bottom area sampler during fall 2011, winter 2012, and spring 2012. Repeated …
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Evaluating Ecological Influences of Altered Flow Regimes Using Two- and Three-Dimensional Hydrodynamic Models
… near river obstructions such as boulders and large woody debris provide unique habitat for many aquatic organisms. Numerical modeling of the flow structures surrounding these obstructions is challenging, yet it represents an important tool for aquatic habitat assessment. Moreover, efforts for …
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Seasonal habitat use and survival of brown trout (Salmo trutta) in Oatka Creek, Monroe County, New York
… is recovering. The relative abundance of large trout (400+ mm TL) was greater than expected, which may be a result of low trout densities (i.e., reduced competition and increased resource availability may have enhanced growth and survival rates). Velocity refuges and structural cover were …
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Influence of riparian vegetation on near-bank flow structure and rates of erosion on a large meandering river
… external forcings on the meander dynamics of large rivers remain poorly understood. This dissertation research is organized into three separate investigations from two elongate meander loops with different riparian vegetation on a large river. The first study focuses on the spatial patterns of …
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