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 22 for “"mobile species"”.
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Predicting Mobile Species Response to Landscape Structure: The Roles of Spatiotemporal Pattern and Individual Dispersal
… impact resident populations of animal species, is a critical question for the conservation management of multiple-use reserves harboring rare and endangered species. Here I examine this question with a general, spatially-explicit, stochastic, individual-based simulation of a continuous …
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Advances in modelling the effectiveness of Marine Protected Areas (MPAs) to enhance conservation management of mobile fish stocks.
… proposed as beneficial for conservation of fish species and as fisheries management tools. However, there is lack of consensus about the benefit of MPAs for mobile species, which are under-represented in the literature. Empirical data in this field are lacking for mobile species so mathematical …
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Nanoscale Liquid Dynamics in Membrane Matrices: Insights into Confinement, Molecular Interactions, and Hydration
… ionomer membrane and prompts fast transport of mobile species. At relatively low hydrations, the nanoconfinement of the polymer matrix leads to the ordering of confined water and prompts a high energy barrier for transport. We then delve deeper into the confinement effect by molecular modeling …
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The oxidation of ilmenite: a kinetic study
… to be diffusion controlled, with iron the likely mobile species above 525°C, while no mechanism could be singled out for the controlling step in the early stages. The oxidation products in O₂ after 24 hours were shown to be pseudorutile (Fe₂Ti₃O₉) and hematite (Fe₂O₃) in a finely dispersed phase …
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Predation On The Eastern Oyster Crassostrea Virginica On Intertidal Reefs Affected By Recreational Boating
Widely regarded as a keystone species and ecosystem engineer, the eastern oyster Crassostrea virginica plays a vital role in estuarine environments. Complex, three-dimensional oyster reefs act as havens for biodiversity and contribute to ecological processes. Recently, concern for this resource has …
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Cross Environmental Variable Synchrony
… as synchrony, is when populations of the same species at different locations exhibit similar fluctuations through time in density or abundance. Synchrony is often measured as the correlation between population abundance/density time series in different locations. The three main, classically …
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Using stable isotopes to trace the movements of ducks in southern Africa
… I sampled and analysed feathers of ten duck species for stable isotope proportions of Carbon (δ13C), Nitrogen (δ15N) and Hydrogen (δD), from five wetlands (Strandfontein and Barberspan in South Africa, the Manyame catchment in Zimbabwe, Lake Chuali in Mozambique, and Lake Ngami in Botswana) …
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Snail grazing effects on the composition and metabolism of benthic diatom communities and subsequent effects on fish growth
… The snails are able to selectively graze these mobile species. Their gut contents are enriched in carbon. nitrogen and algal pigment content by 20-40 times over the surface sediments. A small, non-significant, growth effect can be seen in the snails' response to density changes, but another …
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Investigating Nekton Response to Changing Salinities in the Mississippi Sound: An Experimental and Statistical Approach
… Sound provides nursery habitats for many coastal species and is recognized for its commercial fisheries. Previous freshening events linked to the Bonnet Carré Spillway, a Mississippi River flood diversion structure, proved catastrophic for oyster populations in the Mississippi Sound, but effects …
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Habitat partitioning by sparrows along an elevational gradient
Although species replacements along environmental gradients are commonly attributed to interspecific competition, predictions of what species distributions would be in the absence of competition are usually lacking. I tested alternative hypotheses that might account for species distributions …
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Chromosomal inversions as a mechanism for sympatric differentiation in common quails
… isolation, but their effects in highly mobile species remain poorly understood. In the common quail Coturnix coturnix, a large inversion on chromosome 1 spans about 12% of the genome and defines three karyotypes (AA, AB, BB) that differ in morphology and migratory behaviour while still …
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Population genetics of species on the genera Tursiops and Delphinus within the Gulf of California and along the western coast of Baja California.
… structure of two closely related cetacean species, bottlenose (Tursiops truncatus) and common dolphins (Delphinus spp.) within the Gulf of California (GC) and along the West Coast of Baja California. In this study, we found evidence of strong genetic differentiation in both bottlenose and …
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An experimental study of the environmental impacts of CCA-treated wood waste land application
… of magnitude. Furthermore, the more toxic and mobile species of arsenic (As III) and chromium (Cr VI) were detected in both soil and leachate samples. A mass balance was produced which demonstrated that CCA wood tends to leach on initial exposure to a leachant and also during weathering of the …
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The effects of flooding disturbance on the distribution and behaviour of riparian arthropods along a lowland gravel river
… factors influence the assemblage structure of mobile, riparian arthropods along spatially structured river banks of a rain-fed, lowland gravel river, the Common Meuse. As riverine ecosystems are basically non-equilibrium, dynamic ecosystems, mainly flow regimes and flood pulse characteristics …
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Drivers of variation in the migration and foraging strategies of pelagic seabirds
… strategies. In this thesis, I utilise multi-species and longitudinal datasets from albatrosses and petrels, some of the most mobile species on Earth, to explore the drivers of variation in movements, habitat use and foraging behaviour, and the implications for life history and conservation. …
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Evaluating the Conservation and Ecological Roles of Large Marine Protected Areas for Threatened Sharks
… specifically with the goal of conserving shark species, despite equivocal evidence for their efficacy, particularly for broad ranging species. Here, I test a set of questions about the role of large marine protected areas in shark conservation using advanced spatial and quantitative analyses. In …
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Electro-chemo-mechanics of solids: application to all-solid-state batteries, polyelectrolyte gels, and actuators.
… deformations, electrostatic influence on charged species, and simultaneous cross-diffusional transport of multiple mobile species. We have suitably specialized this general framework to model: (i) ionic polymer-metal composites, (ii) ionotronic devices, and (iii) polyelectrolyte gels. Using the …
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The effectiveness of Autonomous Underwater Vehicles (AUVs) for mapping and monitoring the seabed – a novel toolkit for marine management
… management process (seabed mapping, monitoring mobile species, and assessing benthic impacts) aimed specifically for assisting conservation and fisheries managers, whilst also testing the capabilities of an AUV to collect data, often in remote and challenging conditions. It was demonstrated …
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Variation drives response to urbanisation: Evolutionary ecology of two introduced birds within anthropogenic environments : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… in spatially adjacent areas, even for highly mobile species.
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Predicting Transitions in Fischer-Tropsch Reactors
… the adsorption and mobility of several cobalt species that might form on the TiO2 support surface. It is found that reactor species generally have a strong effect on the binding properties of cobalt, and that this effect could either strengthen or weaken its bond to the surface depending on how …
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