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 18 of 18 for “"instream habitat"”.
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Effects of urbanization on instream habitat and fish assemblages in the chattanooga metropolitan area, Tennessee-Georgia
… 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 10-year period (1998-2008). Electrofishing yielded 12,329 fish, composed of 38 species from eight families. …
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Multiscale Anthropogenic Impacts on Stream Condition and Fish Assemblages in Amazonian Landscapes.
… of land use change for the condition of instream habitat and fish fauna remain very poorly studied and understood. This thesis aims to address part of this knowledge gap by investigating the effects of anthropogenic disturbances occurring at multiple spatial scales on stream condition and …
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Spring-fed streams in Virginia and assessment of livestock impacts
… of two studies surveyed fish communities and habitats in first-order spring streams in Virginia. Springs exhibited low species (3.3) and trophic guild (2.5) richness, and fish densities averaged 0.47 individuals/m². Two species, blacknose dace (Rhinichthys atratulus) and sculpins (Cottus sp.) …
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Spatial habitat variation in a Great Plains river: effects on the fish assemblage and food web structure
… in the Kansas River, USA in relation to habitat changes. Fishes were collected at ten sites throughout the Kansas River for assessing assemblage structure in summer 2007 using fish community metrics and at 3 sites in 2006 for food web structure using stable isotope analysis. Satellite …
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Recovery From and Effects of a Catastrophic Flood and Debris Flow on the Brook Trout (<i>Salvelinus fontinalis</i>) Population and Instream Habitat of the Staunton River, Shenandoah National Park, VA
… a catastrophic flood and debris flow altered the instream habitat and <i>Salvelinus fontinalis</i> population of the Staunton River. The debris flow scoured the streambed, deposited new substrate materials, removed trees from the riparian zone, and eliminated fish from a 1.9km section of the …
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Local effects of culverts on habitat features and fish assemblages in Blue Ridge streams
… May-August 2008. Culvert-related effects on instream habitat and fish assemblages were measured at 10 stream sites: five sites contained culverts with artificial bottom substrates and five sites contained culverts with natural bottom substrates. On each stream, paired sampling reaches (reach …
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The development of geomorphic and hydraulic complexity within streams and its influence on fish communities following glacial recession in Glacier Bay, Alaska
… As stream age increased, however, slower flowing habitat units such as glides and pools became more dominant, resulting in increased geomorphic, hydraulic and riverscape diversity. Determination of these changes in hydromorphic complexity which occur as streams develop, twinned with an assessment …
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Effect of riparian land use on the biotic integrity of fish assemblages in Black Creek, Chattanooga, Tennessee
… assemblages (biotic integrity), water quality, instream habitat, and riparian land-use features at eight sites in Black Creek, May-June 2000. Water quality conditions (temperature, dissolved oxygen, pH, conductivity) were favorable for stream fishes, but some level of habitat degradation (bank …
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Ecohydrologic Indicators of Low-flow Habitat Availability in Eleven Virginia Rivers
… and competition for freshwater is threatening instream uses including ecosystem services and aquatic habitat. A standard method of evaluating impacts of alternative water management scenarios on instream habitat is Instream Flow Incremental Methodology (IFIM). The primary outputs of IFIM …
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An ecological evaluation of an urban stream restoration in West Chicago, Illinois
… function. In this study, I analyzed the physical habitat, water quality, macroinvertebrate community, and fish community of a 13 km stream restoration on the West Branch of the DuPage in the suburban Chicagoland area, using the similar, unrestored East Branch of the DuPage as a reference. The …
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Defining flows to protect instream biota : a critique of the instream flow incremental methodology and the development of a hierarchical habitat-based approach, using the pennant-tailed catlet, Chiloglanis anoterus in the Marite River, South Africa
… thesis focusses on two approaches to determining Instream Flow Requirements (IFR) for regulated rivers, specifically in the sub-tropical eastern region of South Afiica using a flow-sensitive fish species, the pennant-tailed catlett 07iloglanis anoterus. In response to the diminishing and altered …
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Developing a rapid method for assessing the physical stability of streams in Minnesota's Agassiz beach ridges
… in this area host unusually diverse aquatic habitat and biodiversity, but incompatible land use along channels and in watersheds impair their quality and function. Previous rapid assessment protocols have been developed for stream attributes and stability, but these methods have been …
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Detecting Change in Central California Coast Coho Salmon Habitat in Scotts Creek, California, from 1997–2013
… (now Fish and Wildlife) conducted an extensive habitat typing survey of mainstem Scotts Creek, describing all habitat units from the top of the estuary to the limit of anadromy approximately 12 km upstream. I repeated this survey in 2013 to (1) assess changes in the quantity and quality of …
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Defining rarity and determining the mechanisms of rarity for North American freshwater fishes
… freshwater fishes based on the range extents, habitat breadths, and site abundance and examined the relationship between these dimensions of rarity and imperilment. Imperiled fishes were most often rare by all three dimensions, whereas undesignated species were most often common by all three …
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Influence of riparian forest and agricultural land use on community structure and ecosystem function in headwater streams
… promoted to improve stream water quality and instream habitat in agricultural areas because the vegetation can filter runoff, reduce bank erosion, and restore channel morphology. However, previous studies have found that protecting narrow strips of riparian areas, typically 30-50 meters wide …
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Aquatic Macroinvertebrate Production in Predominant Habitats of a Warmwater Stream: The James River, South Dakota
… information regarding aquatic macroinvertebrate habitat in the middle James River. Macroinvertebrate abundance, standing stock biomass, and production were quantified and compared among major instream habitats at two widely separated river sites. Three habitats that dominated the total substrate …