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 8 of 8 for “"riffle habitat"”.
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Food Habits and Biology of Stonerollers (Campostoma) in Southwest Missouri
… ingested by C. a. pullum. This indicated a microhabitat separation with C. a. pullum feeding in slower sections of the riffle habitat. Diet also included (by volume): diatoms, 11-45%; green-blue green algae, 0-17%; and detritus, 41-70%. Young-of-year stonerollers were found to have a consumption …
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DETECTION AND OCCURRENCE OF NERODIA HARTERI (SERPENTES: COLUBRIDAE) IN AN UPPER PORTION OF THE BRAZOS RIVER WATERSHED
… snakes are disproportionately impacted by habitat alteration adjacent to wetlands because of their reliance on both terrestrial and aquatic habitats. Brazos River Watersnakes, <em>Nerodia harteri</em>, are endemic natricines with one of the most restricted geographic ranges in North …
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A Comparison of the Index of Biotic Integrity by Habitat Type in Swan Creek, Southwest Missouri
… Within these reaches we sampled individual habitats, runs, pools, and/or riffles, and scored them in the same manner. Scores from the specific habitats were then compared to the scores from that site's entire stream reach. Scores from the individual habitats were consistently lower than …
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Habitat Associations Of Stream-Dwelling Salamanders At Multiple Spatial Scales In Central Kentucky Headwaters.
<p>Headwater stream systems are productive habitats that are often at risk of human perturbation, and it is crucial that ecologists understand natural patterns and processes within these ecosystems. Using a multi-scale approach, I investigated factors influencing habitat associations of …
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Analyses of Two Aspects of Study Design for Bioassessment With Benthic Macroinvertebrates: Single Versus Multiple Habitat Sampling and Taxonomic Identification Level
… of evaluating the ecological condition of habitats by surveying the resident assemblages of living organisms. Conducting bioassessment with benthic macroinvertebrates is still evolving and continues to be refined. There are strongly divided opinions about study design, sampling methods, …
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Spatiotemporal Variability in the Macroinvertebrate Community of a Small Coastal California Stream, Little Creek, Davenport, California
… California. The significance of physical habitat characteristics in describing macroinvertebrate assemblage structure was assessed in an effort to create a framework to better understand the expected biological response to riparian canopy manipulation. Seven study reaches were established …
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Multi-scale patterns of habitat use by Roanoke logperch (Percina rex) in Virginia rivers: a comparison among populations and life stages
… Virginia. This dissertation examines multi-scale habitat use patterns by logperch in three river systems in Virginia, including comparisons among rivers and life stages. The first study in this dissertation compares microhabitat use patterns of logperch among the Roanoke, Pigg, and Nottoway …
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Benthic Community Structure Response to Flow Dynamics in Tropical Island and Temperate Continental Streams
… spatial distribution of macroinvertebrates and habitat template characteristics in tropical and temperate freshwater streams of the West Maui Mountains, Maui, Hawaii, and in Dayton, Ohio. </p><p>The first two studies took place in Hawaiian mountain streams that have been diverted, often removing …