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 13 of 13 for “"multiple disturbances"”.
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Influence of Multiple Disturbances on Stream Structure and Function
We investigated the influence of multiple disturbances on ecosystem structure and function in a headwater stream adjacent to an abandoned arsenic mine using an upstream (reference) and downstream (mine-influenced) comparative reach approach. In this study, floods were addressed as a pulse …
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Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness.
… expected to see an increase in the frequency of disturbances including wildfires and severe windstorms. While boreal forests such as those of the BWCAW are generally considered disturbance adapted, it is uncertain how changing disturbance regimes will impact these forests. We used a series of …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
Interactions between multiple disturbances have been shown to have unexpected, and often undesirable effects on ecosystems and biodiversity. Improving our ability to predict and manage the outcomes of multiple disturbances is therefore an important research priority. In this thesis, I focused on …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
Interactions between multiple disturbances have been shown to have unexpected, and often undesirable effects on ecosystems and biodiversity. Improving our ability to predict and manage the outcomes of multiple disturbances is therefore an important research priority. In this thesis, I focused on …
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Managing Disturbances in Supply Chain Systems
… approach were also extended to consider multiple disturbances, one after another as a series, on a real-time basis. Finally, the experimentation was conducted and the heuristic results were compared with other standard solution approaches to judge and validate the results. The framework …
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Three essays on forestry economics and management
… welfare, and factors ranging from natural disturbances to institutional environments play important roles in influencing the outcomes for both landowners and society. This dissertation, consisting of three essays, delves into the forest sectors in both developed and developing countries …
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Detection and Classification of Disturbances in Islanded Micro-grid
… to regulate the system. Power quality (PQ) disturbances in the micro-grid make it further vulnerable, especially when the micro-grid operates in an islanded mode. The PQ disturbances only occur for a few cycles and cannot be easily detected directly in the time domain. This thesis utilizes …
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Electromagnetic Risk Management for Dependability of Road Vehicles using Discrete Bayesian Networks
… the limitations of assessing EMI risks due to multiple disturbances that can be simultaneously present (multitone) in the system EM environment. Two new multi-causal effect prediction models are proposed in this thesis to predict the failure probability of E/E/PE systems due to multitone EMI. …
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Free surface flows over submerged obstructions
… free surface flows subjected to one or multiple disturbances are considered. Flow configurations involving either a single fluid or two layers of fluid of different but constant densities, are examined. Both the effects of gravity and surface tension are included. Fully nonlinear …
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Improvements to power system dynamic load model parameter estimation
… we try to use it to predict the result of other disturbances. We present three methods for reducing the effect of parameter unidentifiability. First, we try increasing the size of the training data to include multiple disturbances, but this does not have a significant impact. Second, we present …
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Demography and leaf physiology of Cornus drummondii in response to disturbance in tallgrass prairie
… to disturbance and emphasize the need for multiple pressures to control the spread of clonal shrubs into grasslands. Additionally, I investigated the effects of fire on leaf physiology. I compared gas exchange rates, water use efficiency, and leaf structure of C. drummondii shrubs …
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Application of disturbance theory to assess impacts associated with a three-dimensional seismic survey in a freshwater marsh in southwest Louisiana
… relationships, and the interactive effects of multiple disturbances are required for meaningful usage of these models. The Lacassine National Wildlife Refuge (LNWR) proved to be an ideal laboratory to test various aspects of ecological disturbance theory. I found that the primary disturbances …
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Spatio-temporal patterns of forest disturbance in western North America: implications for forest resilience
… or other known drivers. Interactions among multiple disturbances such as these are important to understand, as they have the potential to erode compensatory responses and therefore mechanisms of forest resilience. Finally, I quantified the range of variation in burn severity patch structure …