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.
Results
Showing 1 to 20 of 592 for “"spatial scales"”.
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Resilient agri-food flow networks across spatial scales
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Socioeconomic Impacts of Transportation Infrastructure at Different Spatial Scales
… experienced by lower-income or spatially segregated communities. This dissertation contributes to the research in the area of socioeconomic and distributional implications of transportation investments by: (i) studying the effects of transportation infrastructure development on …
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Understanding and modeling food flow networks across spatial scales
… within a country? How do food flows vary with spatial scale? How can we model food flows in locations without empirical information? This dissertation seeks to address these three overarching questions. First, this dissertation presents a novel application of network analysis to empirical …
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Quantifying the Size Distribution of Rivers Across Spatial Scales
… surface area but has not been tested across spatial scales. We measured river size in four nested basins within the Mississippi River Basin using a combination of remote sensing and field surveying to determine the statistical size distribution of rivers from continental to headwater scales. …
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The Effects of Invasive Plants on Biodiversity Across Spatial Scales
… studies can be explained by a difference in the scales of investigation at which these studies take place. In addition, the processes by which invasive plants influence community structure leads to slow, long-term extinction dynamics that mask likely future plant extinctions.</p> <p>In Chapter 1, …
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Investigation of the multiple-demand network at multiple spatial scales
… and local field potentials (LFPs), during a spatial working memory task. While single neurons showed dynamic coding of target information rather than persistent coding, LFPs held this information constant through time. The impact of reference voltages on LFP data was further investigated. …
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Fish Community Assembly At Multiple Spatial Scales In East Texas Streams
… vary in strength across different spatiotemporal scales. Therefore, revealing how stream fish communities are influenced by environmental gradients may clarify how communities respond to disturbance associated with anthropogenic change. I investigated the relative role environmental variables play …
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Aeolian dust emission dynamics across spatial scales: landforms, controls and characteristics
… dust sources can be identified at the landform scales which particularly include ephemeral river valleys and saline pan surfaces. These persist throughout the 25-year record; however, a gradual shift in source point clusters is noted through time, which can be tentatively attributed to …
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Computational analyses of immune responses at disparate temporal and spatial scales
… that span a wide range of time and length scales and require a diverse set of solutions. This thesis describes three projects that span the extremes of this range, from nanometers over nanoseconds to organism-wide responses over hours. The first project was motivated by a puzzle: …
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Monitoring and Imaging Seismic Velocity Changes Across Temporal and Spatial Scales
… the temporal changes but also imaging the spatial variations of dv/v. Based on the spacetime dv/v observations, I investigate groundwater fluctuations in the Coastal Los Angeles Basins during 2000–2020. The spatial imaging of dv/v reveals pronounced seasonal variability in confined …
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Using Emerging Methods to Investigate Stream and Groundwater Interaction at Multiple Spatial Scales
… of this country from Lewis and Clarks pioneering spatial explorations to Thoreau's revolutionary scientific investigations; yet only very recent modeling and technological advancements have allowed us to apply these principles in a more distributed quantitative fashion. The resulting description …
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ASSESSING FOREST RESPONSES TO CLIMATE CHANGE AND RESOLVING PRODUCTIVITY MEASUREMENTS ACROSS SPATIAL SCALES
Informed decisions regarding forest and carbon resources require knowledge of the impacts of environmental changes on forest productivity. We also need to reconcile the diverging productivity estimates that are presently available. This dissertation assembles two publications addressing the impacts …
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ASSESSING FOREST RESPONSES TO CLIMATE CHANGE AND RESOLVING PRODUCTIVITY MEASUREMENTS ACROSS SPATIAL SCALES
Informed decisions regarding forest and carbon resources require knowledge of the impacts of environmental changes on forest productivity. We also need to reconcile the diverging productivity estimates that are presently available. This dissertation assembles two publications addressing the impacts …
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THE ROLE OF SPATIAL SCALES IN BIOGEOGRAPHY AND EVOLUTION OF SOIL-BORNE STREPTOMYCES
… occurs at local, regional, and continental scales, and is caused by both barriers to dissemination (such as elevation and distance) and inability to establish a population in a new habitat due to local biological conditions. Horizontal gene transfer (HGT) also emerges as an important …
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Quantifying soil ecosystem services across different spatial scales to improve agricultural nitrogen management
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-05-01
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Wind-Driven Sea Surface Wave and Coastal Water Level Dynamics Across Different Spatial Scales
… surface waves and water levels at three scales: a coastal sea, a tidal bay, and a sandy beach. A numerical model is developed for the Strait of Georgia to investigate the influence of wind resolution on locally generated wave and storm surge. A finer scale numerical model is applied to …
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Fish and Habitat Relations at Multiple Spatial Scales in Cheyenne River Basin, South Dakota
Fish distributions and habitat relations have not been extensively studied in streams of Northern Great Plains. I analyzed fish distributions and investigated relations of reach (e.g. channel shape, substrate) and landscape scale (e.g. catchment area) factors to small stream fish communities, in …
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