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 99 for “"anthropogenic disturbance"”.
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Connecting the Plots: Anthropogenic Disturbance and Mojave Desert Tortoise (Gopherus agassizii) Genetic Connectivity
Habitat disturbance impedes connectivity for native populations by altering natural movement patterns, significantly increasing the risk of population decline. The Mojave Desert historically exhibited high ecological connectivity, but human presence has increased recently, as has habitat …
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Elk (Cervus elaphus) response to anthropogenic disturbance: hunting, land use, and climate change
… from 2010-2011 to examine elk response to anthropogenic disturbances such as hunting, land use practices, and climate change. I determined that elk are disrupted during hunting and movement behavior suggests they may be beginning to relocate off-refuge. I found that parturient elk have the …
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Natural patterns and anthropogenic disturbance in north Adriatic marine benthic assemblages: descriptive and methodological studies
… spatial and temporal scales. Both natural and anthropogenic sources of disturbance act together in affecting benthic sedimentary characteristics and species distribution. The description of such spatial variability is required to understand the ecological processes behind them. However, in …
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A Comparison of Eastern Gray Squirrel (Sciurus Carolinensis) Nesting Behavior among Habitats Differing in Anthropogenic Disturbance
… and climates, and live with various levels of anthropogenic disturbance. Previous studies have examined this species in unmodified and modified surroundings; however, a comparison of populations between these habitats has yet to be published. Their widespread occurrence coupled with their …
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Biotic Assessment Of Two Central Kentucky Streams: Examining The Effects Of Wastewater Treatment And Anthropogenic Disturbance
<p>Globally, anthropogenic disturbance has altered many aquatic habitats, including lotic waters. Flowing, fresh water sustains life on Earth yet suffers the resulting waste products. Native, locally adapted ecosystems integrate or eliminate the byproducts of life. However an increase of human …
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The Consequence of Anthropogenic Disturbance on Communication and the Operation of Sexual Selection in the Eastern Bluebird (Sialia Sialis)
… environment are favored by natural selection. Anthropogenic disturbance can rapidly alter the signaling environment, and recent studies have shown that acoustic and visual signals change in response to these altered habitats. Although these studies provide important insight into the effects of …
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Evaluation of anthropogenic disturbance on African clawless otter (Aonyx capensis) physiological stress, behaviour, and population density using non-invasive methods
Land transformation for anthropogenic use is the leading cause of species declines globally, but some species are able to succeed in these environments. African clawless otters (Aonyx capensis) are the most widely distributed otter species in Africa and occur in a wide variety of habitats, …
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Assessing the Impacts of Balsam Woolly Adelgid (Adelges Piceae Ratz.) and Anthropogenic Disturbance on the Stand Structure and Mortality of Fraser Fir (Abies Fraseri (Pursh) Poir.) in the Black Mountains, North Carolina
… heavily impacted by both direct and indirect anthropogenic disturbances, including logging and logging- associated fires, and high mortality rates due to the introduction of the exotic insect, balsam woolly adelgid (BWA) (Adelges piceae). The decline in Fraser fir is particularly concern …
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The Importance Of Surface Mining As A Landscape Variable In Shaping Wild Bee Communities In Central Appalachian Forests
<p>Anthropogenic disturbance has led to widespread losses in biodiversity. Native bees (Hymenoptera, Apoidea) provide essential pollination services and have been declining in abundance dramatically in recent years. One potential cause of these declines is anthropogenic disturbance. Eleven sites …
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Soundscapes of Sumatra: an analysis of the susceptibility of vocal fauna to ecological edge effects within a historically disturbed lowland forest, Sumatra, Indonesia.
… in combination with microclimate variation and anthropogenic disturbance can influence the species composition of both flora and fauna and can cause losses in biodiversity and ecosystem resilience. Soundscape analysis can assess the spatial and temporal variations in biodiversity and species …
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Puma Dispersal Ecology in the Central Rocky Mountains
… topographic cover, suitable hunting habitat, and anthropogenic disturbance. Models were fit to location data from GPS-marked (n=11) and VHF-marked (n=123) dispersers from all three study areas. Model selection, using Akaike’s Information Criterion, found landscape characteristics associated with …
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Puma Dispersal Ecology in the Central Rocky Mountains
… topographic cover, suitable hunting habitat, and anthropogenic disturbance. Models were fit to location data from GPS-marked (n=11) and VHF-marked (n=123) dispersers from all three study areas. Model selection, using Akaike’s Information Criterion, found landscape characteristics associated with …
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The effects of forest degradation on arboreal apes within Sikundur, the Gunung Leuser Ecosystem, Northern Sumatra.
… and the fauna that inhabit tropical forests. As anthropogenic disturbance removes available habitat for rainforest species and degrades remaining forests, a multitude of species are threatened. There is a need to develop methods to rapidly assess tropical forest structure and relate this to …
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Differential habitat selection of black bears, gray wolves, and boreal caribou in the Boreal Shield of Saskatchewan
… in populations have been driven largely by anthropogenic disturbance, and in this context much research has been directed at caribou habitat selection and that of their predators, including wolves (Canis lupus) and black bears (Ursus americanus). However, in the Boreal Shield of Saskatchewan …
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Ecological Conservatism and Traits Predict Introduction Risk and Co-Occurrence for the Flora of Chicago
… to their skill at colonizing habitats marked by anthropogenic activity. In this thesis, we examine how various traits impact a plant’s ability to exploit human caused dispersal and disturbance. In chapter 1, we examine the coefficients of conservatism (C-scores) for the flora of the Chicago …
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Ecology and Conservation of Shrubland Bird Communities in the Eastern Ghats of Indi
<p>Anthropogenic disturbance, in its multiple facets represents a major threat to biodiversity and habitat quality. Consequently, extensive research is guided towards understanding anthropogenic disturbance and their effects on wildlife for development of wildlife management plans. However, for …
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Forest ecosystem response to environmental pressures along an urban-to-wildland gradient in southwestern Ohio
… landscapes across the United States. A myriad of anthropogenic environmental disturbances invariably accompany such dramatic shifts in land use, including increases in pollution, soil degradation, introduction of non-native species, land cover transitions, and habitat fragmentation. Disentangling …
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Biological assessment of tropical riverine systems using aquatic macroinvertebrates in Tanzania, East Africa
… bioassessment method for assessing the degree of anthropogenic disturbance in Tanzanian rivers. The hypotheses that, 'macroinvertebrate assemblages reflect disturbance in river systems'; 'rivers with similar abiotic features have similar macroinvertebrate assemblages'; and 'spatio-temporal …
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