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 43 for “"suitable habitats"”.
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Characterization of Suitable Habitats for Freshwater Mussels in the Clinch River, Virginia and Tennessee
… to create habitat for freshwater mussels, suitable microhabitat conditions must be defined. In this study, I used multiple approaches to define suitable microhabitats for species in the free-flowing upper Clinch River, Virginia and Tennessee, where reproducing mussel populations persist. …
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A Biogeographic Analysis of the Socially Polyphenic Spider <em>Anelosimus studiosus</em> in East Tennessee.
… vary significantly among seemingly suitable habitats within its range in east Tennessee. I conducted a large-scale survey of east Tennessee lake systems to establish connections between spider presence and geographic features such as aspect, slope and elevation. These geographic …
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Seasonal habitat and movement ecology of adult brook trout in a northern Michigan headwater stream
… but the degree to which brook trout move among suitable habitats depends on life history strategy and stability in environmental conditions. This study examined the seasonality of stream-resident adult brook trout habitat use and movement patterns, and the influence of brook trout size and …
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Insects in mountainous landscapes: Implications of landscape context and climate change
… and climate change. For example, if sufficient habitats are not available along their migration routes, insect habitat specialists may not be able to successfully follow shifting climatic envelopes. In this thesis I addressed four intertwined questions: What are the resource requirements — …
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Bridging the Gap: Exploring the Challenges and Opportunities to Creating Wildlife Corridors in the Great Plains
… progresses, forcing wildlife to relocate to more suitable habitats. Croplands, especially within the Great Plains region of the U.S., can be a major contributor to fragmentation. Wildlife corridor creation, linkages that reconnect pieces of habitat, is a promising and effective policy tool to …
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Designing against habitat loss: Facilitating movement of the Louisiana black bear
… threaten to erase and further fragment any suitable habitats that do remain. The Louisiana black bear faces especially acute problems as a large mammalian predator, due to expansive spatial requirements and lack of eager reception by many humans. Its population has been reduced to around 750 …
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Neglected pollinator syndromes in seasonally inundated Renosterveld
… is generally not limited by a shortage of suitable habitats. Environmental variability may therefore play the largest role in determining the emergence and abundance of pollinators. This has implications for plants reliant on insects for their pollination, especially for species with …
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Community persistence and the pattern of community variability over time: a test using fossil assemblages from four marine transgressions in the Breathitt Formation (Middle Pennsylvanian) of Eastern Kentucky
… led to the establishment of a variety of marine habitats in the central Appalachian basin. These habitats included marginal marine, nearshore normal marine, nearshore stressed, offshore normal marine, and offshore dysaerobic environments. Fossil collections were made and species abundance …
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Predicting suitable areas for cultivation and conservation of the baobab tree and investigating superior sources of planting material
… of the present distribution was predicted to be suitable in the future. Some countries were found not to have any suitable habitats for the baobab tree in the future. Several conservation strategies are recommended, such as in situ conservation in Protected Areas; ex situ conservation in Seed …
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A Comparison of Eastern Wild Turkeys and Rio Grande Wild Turkeys in Northeastern South Dakota
… and area landowners is to restore the most suitable subspecies of wild turkey in the remaining suitable habitats of South Dakota. Rio Grande wild turkeys (Meleagris gallopavo intermedia) were successfully introduced into northeastern South Dakota in 1972-73, and reached peak populations in …
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Potential impacts of climate change on myosorex as a model for extinction risk of montane small mammals in South Africa
… and specificity threshold was used to map suitable habitat and the number of resolution were counted to get the present and future range including percentage decrease or increase in range. The current distributions and the future distributions for all the species were compared to determine …
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Population dynamics of the Columbia spotted frog (Rana luteiventris): inference from long-term demography
… and other ectotherms inhabiting alpine or boreal habitats at or near their thermal ecological limits may benefit from the milder winters provided by a warming climate as long as suitable habitats remain intact.</p> <p>I then used Bayesian models to demonstrate that changes in mean snowpack had a …
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A Landscape Approach to Grassland Bird Conservation in the Prairie Pothole Region of the Northern Great Plains
… in Chapter 3 I test whether birds use otherwise suitable habitats by experimentally removing trees in a before-after/control-impact design. This is the first study to experimentally show that songbirds avoid woody edges in otherwise suitable habitat. Avoidance of trees is apparent as far away …
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Population dynamics of the Columbia spotted frog (Rana luteiventris): inference from long-term demography
… and other ectotherms inhabiting alpine or boreal habitats at or near their thermal ecological limits may benefit from the milder winters provided by a warming climate as long as suitable habitats remain intact.</p> <p>I then used Bayesian models to demonstrate that changes in mean snowpack had a …
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A Landscape Approach to Grassland Bird Conservation in the Prairie Pothole Region of the Northern Great Plains
… in Chapter 3 I test whether birds use otherwise suitable habitats by experimentally removing trees in a before-after/control-impact design. This is the first study to experimentally show that songbirds avoid woody edges in otherwise suitable habitat. Avoidance of trees is apparent as far away …
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The Role of Artificial Structures in Facilitating Range Expansion of the Introduced Barnacle Megabalanus Coccopoma in the Southeastern U.S.A.
… that offshore artificial structures are suitable habitats for <em>M. coccopoma</em> adults and these structures also house <em>M. coccopoma</em> populations that are composed of stable, mature individuals that can serve as an abundant source of larvae. The genetic assessment revealed high …
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Genomics and ecology of rapid adaptation: the expansion and evolution of the invasive common myna (<i>Acridotheres tristis</i>) and common starling (<i>Sturnus vulgaris</i>) in New Zealand
… between the two species in New Zealand. Future suitable habitats were projected under different climate change scenarios and highlighted areas at risk of future invasions in New Zealand. Lastly, I utilised whole-genome resequencing data from 82 myna individuals from four native and seven …
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Studies on the Odonata and Trichoptera of high-elevation lakes of northern Colorado and southern Wyoming
… species distributions at high-elevation lentic habitats in Northcentral Colorado and Southern Wyoming. I provided occurrence records of the Hudsonian Emerald dragonfly (Somatochlora hudsonica, HED) in Northcentral Colorado and Southern Wyoming. The HED is the only Colorado dragonfly listed as …
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How do human-induced environmental stressors shape the distribution, physiology, and behaviour of the Lemur leaf frog?
… Results indicated a potential increase in suitable habitats by the end of the century. Habitat suitability was highest in regions with stable, warm temperatures (28-29°C) and high but evenly distributed precipitation (monthly average of 358.33mm). The physiological aspect of this study …
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