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 28 for “"mountain streams"”.
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Hydrogeomorphic characterization and classification of Pacific Northwest mountain streams for biomonitoring
… Protection Agency biomonitoring sites in mountainous ecoregions of the Pacific Northwest. Innovative models were developed to predict mountain channel stream types and median substrate size. I applied these multi-scale metrics to develop a priori (without biological calibration) and a …
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Geologic Controls of Base-Flow of Mountain Streams in Northern Nevada
… DSpace on 2014-12-04T19:14:25Z (GMT). No. of bitstreams: 1 6402879.pdf: 3731017 bytes, checksum: 6bb8b8dffcf059659b8ac865a12bc6b2 (MD5) Previous issue date: 1963
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Characterizing flow resistance in high gradient mountain streams, Fraser Experimental Forest, Colorado
High gradient mountain streams dissipate energy when water flows over poorly sorted grains in the bed and banks and over bedforms such as steps and pools, creating a constant alternation between supercritical and subcritical flow and causing energy dissipation through hydraulic jumps. Mountain …
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Relations between large woody debris, physical habitat, and benthic macroinvertebrates in Appalachian mountain streams
… was greater in pools than riffles for both streams, but there was no difference between years, sections, or as a result of LWD additions. Most functional feeding groups and invertebrate orders were significantly more abundant in riffles than pools. The exception were collector gatherers …
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Relationships between flood frequency and riparian plant community structure in mountain streams of western Montana
… plant communities along large, low elevation streams, but it is less clear what role flooding plays in the structure and composition of riparian plant communities along mountain streams. In the first part of this study, I examined the influence of four environmental variables (flood frequency, …
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Relationships between flood frequency and riparian plant community structure in mountain streams of western Montana
… plant communities along large, low elevation streams, but it is less clear what role flooding plays in the structure and composition of riparian plant communities along mountain streams. In the first part of this study, I examined the influence of four environmental variables (flood frequency, …
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Evaluation of Brook Trout (Salvelinus fontinalis) Introductions and Re-introductions Into Four Virginia Blue Ridge Mountain Streams
… were transplanted into each of four Virginia streams in September 2008. Garth Run and Kinsey Run were re-introductions, and Wildcat Hollow and Sweet Run were new introductions. Single pass electrofishing (EF) surveys were conducted with a backpack electrofisher five times during the study. …
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The influence of ultraviolet-B radiation on benthic communities in Rocky Mountain streams with different metal exposure histories
… cycles and hydrologic processes in the Rocky Mountain region. While considerable research has been devoted to understanding these direct impacts of global warming, much less is known about the interactions between climate change and other forms of anthropogenic disturbance. Contamination from …
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Effects of land use on oxygen uptake by microorganisms on fine benthic organic matter in two Appalachian mountain streams
… were measured on samples from two Appalachian mountain streams to determine the effects of land use patterns on microbial respiration. Both Coweeta Creek in western North Carolina, and Wolf Creek in western Virginia, flow through national forest, agricultural land and scattered residential …
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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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Modelling and managing the effects of trout farms on Cape rivers
… of the effluent outlets. Those farms situated on mountain streams had the greatest impact and those on the downstream foothill had a lesser impact. The reduced impact in the foothill zone was probably because these reaches were already disturbed by other catchment activities. Of the three farms …
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ECOTOXICOLOGICAL IMPACTS OF RUN-OF-RIVER DAMS ON THE AMERICAN DIPPER (CINCLUS MEXICANUS) AND MOUNTAIN STREAM FOOD WEBS
… increasingly common alternate energy source on mountain streams. Despite reductions in size and greenhouse gas emissions compared to conventional impoundments, RoR dams may have ecotoxicological impacts through disruption of the natural flow regime. The American Dipper (Cinclus mexicanus) is a …
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Revisão sistemática do complexo de espécie Trichomycterus brasiliensis (Siluriformes: Trichomycteridae)
… extraordinary diversity of Trichomycterus in the mountain streams of southeast Brazil (Costa,1992) inhabiting hydrological basins of the river São Francisco, Paraíba, Grande, Doce, and small coast basins. The present paper describes a monophyletic assemblage including Trichomycterus brasiliensis …
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Flow and sediment movement in stepped channels
… formative mechanism for steps and pools in steep mountain streams. They indicated that the formation of steps and pools is associated with high intensity, low return interval events and the processes of armouring/paving and antidune formation. Lower than formative discharges give the structures …
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Girinos de espécies de Hyla do grupo "Albosignata" (Amphibia, Anura, Hylidae)
… group were shown to be associated with mountain streams from 800m to higher elevation. Two groups of tadpoles have been distinguished, the first involving H. albosignata and H. cavicola and the second H. callipygia, H. fluminea, and H. leucopygia. A key to the tadpoles of the group was …
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Phylogeograpy of Aphanicercella cassida (Plecoptera : Notonemourida) : cryptic speciation?
… in South Africa are limited to cool pristine mountain streams. This provides them with very limited habitat in which to survive. The species of stonefly studied in this project (Aphanicercella cassida) has a very wide distribution unlike most other species which have a limited range. Of …
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Life history and growth of three populations of Glossosoma nigrior (Trichoptera: Glossosomatidae) from three thermally distinct locations
… to expand its geographic distribution from cool mountain streams to warm water lotic habitats.
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Wildfire Impacts on Water Quality and Implications for Disinfection Byproduct Formation
… on water quality and DBP precursor loading in mountain streams and rivers during storm flushes and winter, spring, summer, and fall flow regimes, 2) investigate the effect of both oxygen concentration and temperature on DBP precursor transformation in soil, and 3) understand the effect of soil …
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Forest songbird abundance and viability at multiple scales on the Monongahela National Forest, West Virginia
… areas within 50 m of first- and second-order mountain streams. Overall, more birds were found on upland than on riparian sites; this was true at landscape, transect, and point scales. Abundance of Acadian flycatchers, Louisiana waterthrushes, wood thrushes, and hooded warblers was greater …
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Microbial activity on wood in streams: exploring abiotic and biotic factors affecting the structure and function of wood biofilms
… the structure and function of wood biofilms in streams, the first two chapters summarize research conducted in New Zealand and compare the composition of biofilm colonizing wood to that colonizing rocks and leaves. Similar biofilms developed on wood veneer, natural twigs, and beech leaves, but …
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