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 29 for “"Human disturbances"”.
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Seasonal Movements, Habitat Use Patterns and the Effects of Human Disturbances on Elk in Custer State Park, South Dakota
… movements and habitat use in relation to human use patterns were studied in Custer State Park (CSP), South Dakota from June 1993 to September 1994. Twenty-four adult, radio-collared elk (14 cows and 10 bulls) were relocated by ground triangulation or visual observation from 2-5 times/week …
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Demografía y ecología evolutiva del subarbusto carnívoro Drosophyllum lusitanicum (L.) Link. (Drosophyllaceae)
Natural disturbances occur in various ecosystems and have resulted in the evolution of life histories to buffer or even benefit from disturbance regimes. However, human activities increasingly interact with natural disturbances, posing potentially significant threats to the viability of …
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Forest Structure, above-Ground Carbon Stocks, and Productivity along an Elevational Gradient in the Ecuadorian Andes
… to current climate change scenarios or past human disturbances. The present study integrates biotic (rarefied species richness and leaf traits) and abiotic (climate, soil properties and degradation) factors as possible drivers of AGC stocks, AGC net change (AGCnt), AGC productivity (AGCp) and …
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A Dendrochronological Analysis of Vegetation Change and Climate History in Two Southern Appalachian Balds, Craggy Gardens and Big Bald, NC
… historically been subject to both natural and human disturbances. Such historical and more recent disturbances have had a profound impact on vegetation dynamics in these systems. With the use of dendrochronology and GIS, this research project was aimed at 1) reconstructing the temporal and …
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The role of human disturbance in the dynamics and distribution of sand forest in and around Tembe Elephant Park, KwaZulu-Natal
… the nature and effects of a number of human 'disturbances' on the spatial distribution and dynamics of sand forest in and around Tembe Elephant Park (TEP), Maputaland, South Africa. The first disturbance investigated was that of fire and its role in determining the spatial patterning of …
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Chimpanzee conservation in light of impending iron ore mining project in SE Senegal
… verus</i>). As mining and, subsequently, human populations increase in Senegal, chimpanzee populations will likely be displaced from areas of suitable habitat. To understand the effects of human disturbances on chimpanzee populations prior to mining, as well as chimpanzee habitat use and …
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Short and Long-term Changes in the Fish Assemblages of Bayou Lacombe, Louisiana
Over the past thirty-five years, anthropogenic disturbances around Bayou Lacombe have altered its fish assemblage. In 2005, the impact of Hurricane Katrina on southeast Louisiana presented me with a unique opportunity to explore the effects of a catastrophic storm on the Bayou. I explored the …
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Impacts of Human Disturbance on the Behavior of Sanderlings on the Georgia Coast
… a serious impact on wildlife. However, even when humans do not destroy habitat, their activity can have negative impacts on behavior. The purpose of my study was (1) to test whether the presence of humans altered the behavior of Sanderlings (Calidris alba), (2) to quantify the impacts of staged …
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Vigilance behavior and land use by sandhill cranes (<i>grus canadensis</i>)
… time of day, traffic on the nearest road, and human disturbances. The southern Michigan populations of sandhill cranes nest closer to roads and houses than they have in the past and do not preferentially avoid them. They favor emergent and semi-permanently flooded wetlands and avoid forested, …
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Core Selection by Wolf Packs in a Human-Dominated Landscape: A Case Study in the Mountains of Southern Poland
… were also located significantly farther from human built-up areas than non-core plots. No significant differences were found in forest cover, elevation, or road density between core and non-core plots. These findings suggest that in a region with high human densities and increased levels of …
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Core Selection by Wolf Packs in a Human-Dominated Landscape: A Case Study in the Mountains of Southern Poland
… were also located significantly farther from human built-up areas than non-core plots. No significant differences were found in forest cover, elevation, or road density between core and non-core plots. These findings suggest that in a region with high human densities and increased levels of …
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Is The Exotic Brazilian Pepper, Schinus Terebinthifolius, A Threat To Mangrove Ecosystems In Florida?
… to Florida, providing economic resources to humans, and untold ecological resources to estuarine organisms. In Florida's estuaries, mangrove ecosystems have suffered significant losses due to natural and human disturbances; these disturbances potentially leave mangrove communities vulnerable …
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Fish Community Structure and Associated Habitat in the James River, Southwest Missouri
… gradient of impact on fish populations due to human disturbances. Boat and backpack electrofishing methods were used to determine fish populations at six sites, and previously published fish-based metrics were tested using Pearson correlation and principal components analysis to determine if …
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Comparative analysis of irrational beliefs and alexithymia to predict anxiety, neuroticism, and depression
… neuroticism and depression are highly studied human disturbances in the field of psychology. There are many theories as to the cause of these distresses. Followers of Albert Ellis' Rational Emotive Behavior Therapy have hypothesized that the maintaining of irrational beliefs causes emotional …
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Assessing conservation of a tropical African estuary : waterbird disturbance, livelihoods, and ecotourism
… vulnerability of waterbirds to disturbance from human activity in the estuary, the current use and importance of the area to local livelihoods, and the value (current and potential) of tourism. Waterbird densities and levels of human activity were quantified from 20 September to 25 November 2010 …
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Multi-scale analysis of urban wetland changes using satellite remote sensing techniques
… was to understand how major driving factors - human disturbances and climate variation - impacted urban wetlands as determined by the scale effects of observing land-cover changes. To address this objective, multi-year and multi-season SPOT satellite images were acquired and digitally …
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Ecology and Genetics of Blanding's Turtles in an Urban Landscape
… areas of Blanding's turtles from predators and human disturbances. Ultimately, however, the fate of Blanding's turtles in the GCMA will depend upon the protection and proper management of habitat for Blanding's turtles at all life-stages. Thus, conservation strategies that combine a holistic …
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The changing face of Andean peatlands: the effects of climate and human disturbance on ecosystem structure and function
… temperatures and increasing nutrient inputs from human activities can accelerate decomposition rates in the soil transforming peatlands from sinks to sources of carbon, and reducing their ability to regulate the local hydrological cycles. To identify how rising temperatures and increasing human …
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The status and distribution of rails and other marsh birds in natural and restored wetlands in northern Indiana
… cover. Negative correlations were found for human disturbance, amount of open water, and watershed characteristics. The strongest negative correlationswere found for human disturbances in or around the wetland.In restored wetlands, a significant difference was found between the occurrence of …
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Nesting and Boat Disturbance Studies of Colonial Birds in the Okavango Delta, Botswana
… Delta have been subjected to different forms of human disturbances. Motor boat disturbance is one main example of these disturbances. The objectives of my study were to: (I) obtain baseline data on the nesting success and nest height in colonial waterbirds of the Okavango Delta, (2) evaluate the …
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