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 42 for “"bird community"”.
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Bird Community Structure in Southwestern Missouri
… plot ranging from 1.3 to 1.4 ha were sampled for bird species diversity 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 …
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Community Structure, Nesting Success, and Isolation Effects in a Tropical Forest Bird Community
… even for relatively well-studied taxa such as birds. I studied three aspects of the bird community in the central lowlands of the Republic of Panama. First, I inventoried and measured abundances of birds on a 104-ha study site (the Limbo plot) in the forest interior of Soberania National Park. …
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Using Passive Acoustic Monitoring to Estimate Bird Community Response to Land Management in Southeastern Georgia
… habitat for declining disturbance-dependent birds, such as Bachman's Sparrow (Peucaea aestivalis) and Northern Bobwhite (Colinus virginianus). However, habitat use is likely contingent on specifics of land-use practices, especially those that could alter understory vegetation. My first …
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Effects of Management Practices on Grassland Plant and Bird Community Composition in Kane County Forest Preserves
… had the strongest impact upon grassland bird and plant species niche separation, particularly those gradients defined by management activities such as burning, chemical maintenance, and mechanical maintenance of forbs and brush. The main hypothesis tested was that abundance of grassland …
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Avian habitat relationships in the Mojave Desert
The relationship between bird community composition and plant community composition and structure was studied over three years (1994-1996) in a variety of Mojave Desert habitat types. This study addressed two fundamental questions: what plant community characteristics are statistically related to …
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Habitat use by wintering passerines in fire-managed forests along the U.S. Gulf Coast
… for land managers, I studied the winter bird community at Naval Live Oaks in Gulf Islands National Seashore with two primary objectives: (1) to describe the distribution, abundance, and diversity of the non-breeding winter bird community among the available habitats, and (2) to describe …
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Uma análise da estrutura física de habitat para a comunidade de aves de sub-bosque da reserva biológica Guaribas, Nordeste do Brasil.
… of vegetation structure in the understory bird community of Reserva Biológica Guaribas, Paraíba state, Brazil. We sampled 124 points at the reserve, distributed among Cerrado (savanna formations) and forest formations. All birds were collected using mist nets. We also measured microhabitat …
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AVIAN COMMUNITIES MONITORED ALONG A SUCCESSIONAL CHRONOSEQUENCE IN BOTTOMLAND HARDWOOD FORESTS IN THE LOWER MISSISSIPPI ALLUVIAL VALLEY
… timber harvests. In this study I surveyed bird communities in bottomland hardwood forests in the Lower Mississippi Alluvial Valley along a successional chronosequence. Birds were sampled using automated recording units over 10 days across 149 sites for the breeding bird seasons of 2021 and …
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Burning for birds : the response of bird communities to recent fire history in the Serengeti ecosystem
… and long-term effects of recent fire history on bird communities in the greater Serengeti savanna ecosystem in Tanzania. The study investigated the influence of immediate fire event history ( < one year), cumulative fire regime history (over 14 years), and fire seasonality on bird assemblages. We …
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Thresholds in avian communities at multiple scales: Relationships between birds, forests, habitats, and landscapes in the Ray Roberts greenbelt, Denton
… in highly fragmented landscapes. Forest interior birds are of the most concern to management in riparian forests due to their population declines across much of their breeding range. This dissertation investigates the role that landscape-level and habitat-level factors play on the presence of …
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Experimental study of an avian cavity-nesting community: nest webs, nesting ecology, and interspecific interactions
… identify species interactions that influence community structure. This study examines cavity-nesting bird community interactions within the fire-maintained longleaf pine (Pinus palustris) ecosystem at Eglin Air Force Base, Florida. In chapter 1, I provide a background review of the ecology of …
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Habitat Relationships of Breeding Birds in Bottomland Hardwood Forests of the Altamaha River, Georgia
… 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 identical …
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Songbird community ecology and habitat selection in the Chicago area
… in examining how these stressors impacted bird communities. Specifically, I addressed two questions: (1) how do exotic shrub invasions impact woodland songbirds within urban landscapes? and (2), how do bird communities change across forest-suburb boundaries? Field work was conducted in the …
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Avian ecology and rapid morphological change in a novel plant-frugivore system
… morphological change of the main frugivorous birds on the Hawaiian Island of Oʻahu where all native frugivores have gone extinct. To understand how the morphological changes may influence the species’ ecology, I then related their foraging and movement behavior to their morphology. Lastly, I …
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The Influence of Human Disturbance on Avian Frugivory and Seed Dispersal in a Neotropical Rainforest
… influences avian frugivory and seed dispersal, bird-fruit interactions that facilitate plant reproduction. On Tobago (West Indies), I compared patterns of frugivory in three adjacent rainforest habitats along a gradient of increasing disturbance: primary forest in a reserve, unprotected …
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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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Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates
… plant species composition and physiognomy on bird and invertebrate communities in three discrete, relatively undisturbed forest types along a dry-wet soil moisture gradient. Using discriminant functions analysis, a 100% floristic and a 78% vegetation structural discrimination was obtained …
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Effects of exotic invasive vegetation on breeding birds along the North Chickamauga Creek
… 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 line …
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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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