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 26 for “"cavity-nesting"”.
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Vocalizations influence roost-site selection in overwintering cavity-nesting birds in Eastern Washington
<p>Primary cavity-nesting birds are keystone species because the annual tree cavities they excavate become critical habitat for other species. In eastern Washington, most primary cavity-nesting birds are year-round residents. They increase overwinter survival by night roosting in cavities and …
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Experimental study of an avian cavity-nesting community: nest webs, nesting ecology, and interspecific interactions
Cavity-nesting communities are structured by the creation of and competition for cavities as nest-sites. Viewing these communities as interconnected webs can help identify species interactions that influence community structure. This study examines cavity-nesting bird community interactions within …
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Trees, Birds, and People: Resource Use and Interspecific Interactions in a Namibian Cavity Nesting Guild
Cavity-nesting guilds are diverse communities of organisms that are hierarchically structured around the creation of and competition for tree holes as nest sites. Quantifying these communities as networks of interconnected species, or "nest webs", is a proven and efficient method for identifying …
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Nest-site resources for cavity-nesting birds in the southern Allegheny Mountain forests of West Virginia
Cavity-nesting birds may be negatively impacted by a lack of proper nesting sites. Southern Allegheny Mountain forests of West Virginia are unique due to the juxtaposition and diversity of forest cover types. Management must focus on monitoring wildlife population levels as well as habitat …
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Habitat variation effects on cavity-nesting bee fitness, community assemblages, and parasite interactions in the Colorado Front Range
… wildfire and forest management treatments affect cavity-nesting solitary bee fitness traits including diet breadth and quality, provisioning ability, reproduction and brood development, parasite abundance, and community network metrics. This was done by deploying artificial nesting boxes in the …
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Tree cavity abundance and nest site selection of cavity nesting birds in a natural boreal forest of West Khentey, Mongolia
Höhlenbrütende Vogelarten stellen einen bedeutenden Anteil vieler Waldvogelgemeinschaften. Wegen ihrer engen Bindung an entsprechende Habitatstrukturen sind sie sehr empfindlich gegenüber Veränderungen der Waldstruktur. Daher werden sie als Indikatoren für Habitatqualitäten und Vogeldiversität …
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Incubation behavior, embryonic heart rate, and developmental variation within and among altricial bird species
… similar across focal species, however, the two cavity nesting species, Eastern Bluebirds (Sialis sialis) and Tree Swallows (Tachycineta bicolor), exhibited lower EHR than the other species, while Dickcissels (Spiza americana) exhibited higher EHR than other species. Eastern Bluebirds also …
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Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (tachycineta Bicolor)
… of adults, few have conducted such studies with cavity-nesting species of birds. Therefore, the objectives of my study were to examine the vocal responses of cavity-nesting adult Tree Swallows (Tachycineta bicolor) to different nest predators, some able and others unable to enter nest cavities, …
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The Importance Of Surface Mining As A Landscape Variable In Shaping Wild Bee Communities In Central Appalachian Forests
… mined and unmined sites. The proportion of each nesting group from each site was not significantly influenced by landscape variables in most cases. Cavity nesting bees, however, were most strongly influenced by the presence of a mine as well as the percent herbaceous cover and percent forest …
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The Effects of Wildfire Burn Severity on Bee and Wasp Communities Two Decades Post-Fire
… studied the effects of wildfire burn severity on cavity-nesting bee and wasp abundance and diversity, and nesting habitat across burn severities (high, low, unburned) in the same mixed-severity fires. We found that fire severity had no impact on cavity-nesters, but that high severity fire did …
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Honey Bee (Apis Mellifera) Foraging Preferences are Negatively Correlated with Alfalfa Leafcutting Bee (Megachile Rotundata) Productivity in Virginian Landscapes
… rotundata) are managed, polylectic, solitary, cavity-nesting bees that are widely naturalized in North America. We selected M. rotundata as a model organism to validate the honey bee foraging data because they share some characteristics with other cavity nesting wild bees, but they are a …
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Breeding and dispersal implications for the conservation of the Southern Ground Hornbill Bucorvus leadbeateri
Populations of secondary tree-cavity nesting bird species are often limited by a shortage of natural nesting sites. For the Southern Ground Hornbill Bucorvus leadbeateri that typically nests in natural tree cavities, the shortage of nesting sites is one factor potentially limiting population …
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Estimating the Impact of House Sparrows on Eastern Bluebird Reproductive Success Across an Urban Gradient
… North America, where it usurps nests of native cavity-nesting birds, frequently destroying eggs, and killing nestlings and adults. This two-year study investigated habitat effects as well as the impact and management of HOSPs on the reproductive success in Northeast Ohio of the Eastern Bluebird …
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Biology and conservation of the endangered Bahama Swallow (Tachycineta cyaneoviridis)
… cyaneoviridis) is an endangered secondary cavity-nester that only breeds on three islands in the northern Bahamas: Abaco, Grand Bahama, and Andros. I investigated questions related to population size and distribution, genetic diversity and population structure, breeding biology, and …
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The diversity of flower-visiting insects in the gardens of English country houses
… deployment of commercial trap-nests for solitary cavity-nesting red mason bees in walled gardens revealed new insights into the differential mortality suffered by male and female progeny. Female offspring were found to be disproportionately affected by a combination of development and parasitism …
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Vocal responses of adult Eastern Bluebirds (Sialia sialis) to potential nest predators and the behavioral responses of nestlings
… have examined the responses of nestlings in cavity nests to the anti-predator vocalizations of adults. Therefore, the objectives of my study of cavity-nesting Eastern Bluebirds <em>(Sialia sialis)</em> were to examine (1) the vocal responses of adult Eastern Bluebirds to different predators, …
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The 2006 Warm Fire: effects on habitat and prey species of the northern goshawk
… from high-severity fire, due to increased snags, cavity nesting opportunities, and foraging. American robins and Steller's jays were also evenly distributed across fire severities. High-severity fire had a significant impact on forest ecosystems. Changes in forest structure were found to be …
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BREEDING SEASON AVIAN COMMUNITY COMPOSITION AND PREY AVAILABILITY IN EUCALYPTUS AND SLASH PINE PLANTATIONS OF SOUTHWESTERN LOUISIANA
… stand age and reduced grassland-associated and cavity-nesting birds.</p>
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Assessing the Influence of Prescribed Fire on Faunal Communities in a Pyric Landscape
… or pyrodiversity. Avian species richness of the cavity nesting guild was negatively influenced by increasing time-since-fire. Our results suggest that managers can promote avian community diversity by reducing the size of burn units to create areas with multiple adjacent burn units, with unique …
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Applying ecological models to positive interactions among lotic fishes: implications for population and community regulation at multiple spatial scales
… the nest web framework (previously only used for cavity nesting vertebrate communities) and the stress gradient hypothesis (previously applied almost exclusively to plant communities) for predicting which associate species spawn on nests built by various nest building species, and the consequences …
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