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 110 for “"anthropogenic impacts"”.
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Detecting anthropogenic impacts on estuarine benthic communities
… effects of interacting stressors. Separating the impacts of anthropogenic stressors from natural variability in the marine environment is extremely difficult. This is particularly true for estuaries, due to their inherent complexity and the prevalence of difficult-to-manage diffuse stressors. …
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Genetic Dissection of Anthropogenic Impacts on a Declining Antarctic Fur Seal Population
Anthropogenic pressures such as climate change are reducing the population size of many species globally. Small populations are more vulnerable to extinction, not only because they are more susceptible to demographic and environmental stochasticity but also because the resulting decrease in genetic …
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Assessing Two Centuries of Anthropogenic Impacts on Silver Lake, Summit County, Ohio
… population and human activities often negatively impacts the quality of our waters. Lake sediment often preserves a record of past anthropogenic activities and can be used to assess the impact of humans on the lake system. This study examines Silver Lake, a groundwater-fed kettle lake located in …
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Multiscale Anthropogenic Impacts on Stream Condition and Fish Assemblages in Amazonian Landscapes.
… knowledge gap by investigating the effects of anthropogenic disturbances occurring at multiple spatial scales on stream condition and fish assemblages from human-modified Amazonian forests in the state of Para, Brazil. The thesis starts by asking how instream habitat (composed of both water …
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Anthropogenic impacts on Cerrado conservation and biodiversity and carbon restoration of Atlantic Forest
Anthropogenic interventions are considered as the main threats to biodiversity conservation and ecosystem services provided by natural biomes. The land-use and conversion of these biomes for human survival causes environmental changes from the local scale to the landscape scale. These changes are …
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Applying molecular methods to investigate potential anthropogenic impacts on ageing in a free-living bat species
… driver of global change and whilst direct impacts on wildlife are often clearly visible, the indirect impacts are diAicult to detect using traditional ecological metrics. For habitat specialist species, sensitive to disturbance, subtle changes at the molecular and microbial level may …
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Quaternary geology of the German North Sea and Western Irish Sea Mud Belt: revised stratigraphies, geotechnical properties, sedimentology and anthropogenic impacts
… is recognised as a period with increasing anthropogenic influence on the environment. Onshore records recording glacial/interglacial cycles as well as anthropogenic effects are limited. However, sites of sediment accumulation on the shallow continental shelf offer the potential to …
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Anthropogenic impacts on recharge processes and water quality in basin aquifers of the desert Southwest : a coupled field observation and modeling study
… recharge on basin floors, and no recharge from anthropogenic sources. However, in the Trans-Pecos, nitrate (NO₃-) concentrations have increased in basin groundwater (up by 3-4 mg/l as NO₃- in 40 yrs), refuting the “classic” model and posing water quality risks. Grazing and irrigated agriculture …
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Carbon dynamics in coastal vegetated communities: evaluation of anthropogenic impacts, chemical characterization of dissolved organic matter, and its influence on blue carbon sequestration
… amounts of greenhouse gases, resulting from anthropogenic activities such as the burning of fossil fuels or from livestock activities. This concern was expressed globally with the Kyoto Protocol in 1997, the first international agreement aimed at committing industrialized countries to reduce …
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An Application and Refinement of the Karst Disturbance Index through Evaluating Variability in Island Karst Disturbance in Puerto Rico
… nature of the surface and subsurface. The anthropogenic impacts on karst are deleterious to the ecosystems that are dependent on the karst environment and also to groundwater supplies. The Karst Disturbance Index (KDI) is a holistic tool used to measure anthropogenic impacts associated with …
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Marine biological valuation as a decision support tool for marine management
… intense pressures from both natural and anthropogenic impacts. Marine policy makers are therefore searching new ways to manage the sea in a sustainable way. This thesis describes the development and application of a biological instrument that can be used for marine management, and more …
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From Right-of-Way to Recovery: Challenges and Opportunities in Pipeline Right-of-Way Restoration in Northeast British Columbia
… effective restoration efforts along these linear anthropogenic impacts. Findings highlight where, in the absence of a cohesive regulatory framework, permit holders employ inconsistent methods, with many meeting minimal compliance standards rather than achieving meaningful ecological recovery. …
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Effects of anthropogenic land use on temperate mangrove forests
… processes to provide a holistic view on the impacts that humas are having on these important ecosystems. By working across a broad gradient of human land use, the first chapter establishes a connection between human land use intensity in catchments and regionally generalizable trends in …
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The flow and sediment of the Mlalazi estuary in Kwazulu-Natal, South Africa
… prone to serious degradation from many different anthropogenic impacts (e.g. flow abstraction/diversion, sand mining, soil erosion etc.). In South Africa, many of the anthropogenic impacts on estuarine systems are generally derived from subjective expert opinions that are not supported by …
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Biodiversity and Biogeography of Deep-Sea Gastropod Mollusks from the Pacific Costa Rica Margin
… biodiversity continues to be threatened by anthropogenic impacts such as overexploitation and climate change, documenting and understanding deep-sea biodiversity and the factors that influence it is of critical importance.
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Teacher identity, activism, and empowerment: Entanglements with climate in Aotearoa, New Zealand
… rapidly increasing and potentially catastrophic anthropogenic impacts on the coupled systems of climate, ocean chemistry, ecology, and society. Education could bring about the fundamental change in human behaviour required to avert the potential dystopian futures predicted by climate scientists. …
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Cross-scale assessment of environmental variation on RABV reservoir Desmodus rotundus
Anthropogenic impacts on the natural world are a topic of continued assessment and scientific concern. Human activity has been shown to impact multiple ecological components, with changes to disease dynamics caused by human activity being linked to disease emergence and pandemic risk. In Latin …
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USING LANDSAT IMAGERY TO EVALUATE LANDSCAPE-LEVEL IMPACTS OF NATURAL GAS FIELD DEVELOPMENT: TAZOVSKY PENNINSULA, RUSSIA, 1984-2007
… Because field studies of the environmental impacts of development are often costly or unfeasible given the remoteness of these areas and access restrictions, the use of remote-sensing technologies is a valuable asset for assessing and quantifying disturbance over large areas. Freely …
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USING LANDSAT IMAGERY TO EVALUATE LANDSCAPE-LEVEL IMPACTS OF NATURAL GAS FIELD DEVELOPMENT: TAZOVSKY PENNINSULA, RUSSIA, 1984-2007
… Because field studies of the environmental impacts of development are often costly or unfeasible given the remoteness of these areas and access restrictions, the use of remote-sensing technologies is a valuable asset for assessing and quantifying disturbance over large areas. Freely …
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