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 62 for “"Breeding birds"”.
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An ecological study of the breeding birds of grassland habitats within Illinois
The breeding bird communities of 24 grassland fragments in Illinois were studied between 1987-1990 to examine the influence of area, vegetation structure, species interactions, and habitat management on community structure. Fragment size was found to strongly influence breeding bird species …
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Species-Habitat Relationships for the Breeding Birds of a Longleaf Pine Ecosystem
… North Carolina, the habitat associations for the breeding bird species and the effects of the current prescribed fire program on the avifauna are virtually unknown. Fort Bragg encompasses one of the largest, fire-dependent longleaf pine systems existing today and is a mosaic of forested habitats. …
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Effects of exotic invasive vegetation on breeding birds along the North Chickamauga Creek
… native plant communities, but also for wildlife. Breeding bird community structure could be particularly affected by such invasions and subsequent habitat changes as birds respond quickly to changes in habitat resources. During the 2007 breeding season, bird communities were surveyed using the …
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Habitat Relationships of Breeding Birds in Bottomland Hardwood Forests of the Altamaha River, Georgia
… provide habitat for at least seventy species of breeding birds. However, little is known about habitat associations of breeding birds, specifically within mature, closed-canopy bottomlands. It is often assumed that once bottomlands become mature, closed-canopy forests, that they are essentially …
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Variation In Habitat Thresholds: An Analysis Of Minimum Habitat Requirements Of North American Breeding Birds
… a suite of North American, forest-associated, breeding birds. Records from Breeding Bird Atlases and the availability of remotely-sensed land cover data allowed me to compare habitat thresholds for 25 species across the states of Massachusetts, Michigan, New York, Ohio, Pennsylvania, and …
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Population Ecology and Foraging Behavior of Breeding Birds in Bottomland Hardwood Forests of the Lower Roanoke River
… near edges. I studied nest survival of breeding birds in bottomland hardwood forests of the lower Roanoke River, North Carolina. Nesting success was monitored in two forest width classes: narrow bands of levee forest that were dominated by two edge types, and wide, continuous levee …
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Evaluating Population-Habitat Relationships of Forest Breeding Birds at Multiple Spatial and Temporal Scales Using Forest Inventory and Analysis Data
… studies have documented declines of forest breeding birds in the eastern United States, but the temporal and spatial scales of most studies limit inference regarding large scale bird-habitat trends. A potential solution to this challenge is integrating existing long-term datasets such as the …
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Response of Breeding Birds to Forest Disturbance in the Arkansas Ozarks: Impacts of Uneven-Aged Management, Ice Damage, and Woodland Restoration
<p>Forests of the Ozarks are important breeding grounds for many bird species, each with specific habitat requirements. Natural and anthropogenic disturbance events can alter vegetational structure of forests, thereby influencing communities of breeding birds. The objectives of my study were to …
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Vertebrated Richness of Waterfowl Production Areas in the Prairie Pothole Region of Minnesota
… on study sites; (2) estimate the diversity of breeding birds on study sites; (3) estimate the number of breeding birds on study sites; and (4) determine associations among species, communities, and physiographic regions. Study sites were selected by stratified random sampling within 4 …
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Effects of Land Use on Avifauna in the Lake Thompson Watershed, South Dakota
… in the Lake Thompson Watershed (L TW) to assess breeding bird abundance and evaluate the effects of land use on their distribution. Waterfowl were surveyed first, then all breeding birds, then ring-necked pheasant (Phasianus colchicus) broods. In order to determine the effects of surrounding land …
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Hydrological factors influencing the ecology of riverbed breeding birds on the plains' reaches of Canterbury's braided rivers : a thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the University of Canterbury
… on these rivers. Use is restricted mainly to the breeding season from September to December, so this was the critical study period. Previous, behaviourally oriented studies have occurred mainly in the high country catchments where habitat modification is slight. However, substantial bird numbers …
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Biology and conservation of the endangered Hawaiian Dark-rumped Petrel (Pterodroma phaeopygia sandwichensis)
… small relictual populations. Over 85% of the breeding birds known today nest in and around Haleakala National Park on the island of Maui, the site of a three-year study begun in 1979. The study employed a multidisciplinary approach in an attempt to understand the breeding biology, behavior, …
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Effects of Urbanization on the Avian Community of Oak Woodlands
… effects on both native habitat and wildlife. In birds, these effects can have a variety of negative impacts on behavior and physical health. Habitat degradation, largely through various forms of pollution, leads to impaired immune responses, increased stress levels, altered behavior, and much …
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Malleefowl and anthropogenic change: an integrated analysis of population trends, landscape genetics and movement ecology
Malleefowl are iconic Australian birds that build large mounds to incubate their eggs using external sources of heat. Malleefowl numbers have drastically decreased since European settlement and they are now a nationally threatened species. Their decline is caused by habitat loss and fragmentation; …
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Bird Community Structure in Southwestern Missouri
… from late March through November, 1978. Breeding bird censuses were also conducted in each area during the nesting season. Overall bird species diversity (BSD) was highest in the cedar plot. Breeding bird diversity (BBD) was also highest in the cedar plot as cedar trees provided a greater …
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Conservation of raptors and vultures in Botswana: with a focus on lappet-faced vultures Torgos tracheliotos
… concern to many species of scavenging birds around the world. The importance of Pb for scavenging raptors in Africa however remains under investigated. I therefore explored the association between blood Pb levels (BLLs) of the critically endangered African white-backed vulture Gyps …
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A comparative study of honey mesquite woodlands in southern Nevada and their use by phainopeplas and other avian species
… indices among the four sites, and (3) locate breeding Phainopepla populations and determine breeding season, nesting success, and habitat requirements. Groundwater was closest to the surface at Stewart Valley, which contained the oldest and largest tRees Moapa had the greatest avian density …
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