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 116 for “"changing environmental conditions"”.
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A decision tree framework for assessing status of exploited marine ecosystems under changing environmental conditions
… ecosystems and guide decision support under changing conditions. This work was based on that of the IndiSeas project, which makes use of indicators designed to detect the impacts of fishing on marine ecosystem around the world. A suite of indicators, selected from those utilised in the …
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Phylogeography of Oculina Corals and their Algal Symbionts: Insights into the Origin and Expansion of Oculina Patagonica in the Mediterranean
In a world of rapidly changing environmental conditions, species must effectively respond to their changing habitat or risk extinction. The goal of my dissertation is to elucidate the origins and mechanisms underlying the recent successful population expansion of the invasive coral Oculina …
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Modes and mechanisms of hfq mediated stress regulation in bacteria
… bacteria must be able to respond to its ever-changing environmental conditions. sRNAs have been implicated in a variety of stress-response pathways that help bacterial systems modulate gene expression. The RNA binding protein Hfq facilities this process by, helping sRNA to base pair with its …
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Factors influencing the abundance, community composition and activity states of bacterioplankton from the tidal freshwater James River
Aquatic bacteria respond to changing environmental conditions through a variety of mechanisms including changes in abundance, shifts in community composition and variable activity states. In the tidal-freshwater James River, variation in bacterial abundance was linked to nutrient availability and …
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Spatio-Temporal Variation in Ringed Seal (Pusa Hispida) Density and Habitat Use in the Last Ice Area
… species for exploring ecological changes under changing environmental conditions. Using observations from aerial surveys, this thesis provides the first study on spatio-temporal variation in ringed seal density and habitat use in their northern most range in the Canadian High Arctic, …
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Evolutionary responses to global change: an experimental test of the effect of altered precipitation on hybridization rates in sunflower (Helianthus)
… rates. Thus, this study demonstrates how changing environmental conditions, specifically precipitation, could influence hybridization rates.
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Food Supplies and Demand Reliant on Large Irrigation Dams
… better water management decisions to address the changing environmental conditions and public demand pressuring the nation's agriculture and water infrastructure.
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Tvorba proteinových granulí v diferencovaných buňkách kvasinkových kolonií
… and replicative aging), but also to changing environmental conditions and to cellular responses to stress factors. A relatively large fraction of proteins relocalizes to some type of protein granule during the lifespan of the cell. Granule formation can increase fitness of cells, help …
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Using stimulus frequency otoacoustic emissions to study basic properties of the human medial olivocochlear reflex
… adjust the gain of their ears in response to changing environmental conditions. Activating the reflex with sound reduces cochlear gain, but the mechanisms by which the reflex produces its cochlear effects, the role(s) the reflex plays in hearing and many basic reflex properties are not …
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Extracting transcriptional regulatory information from DNA microarray expression data
… to measure dynamic transcriptional response to changing environmental conditions. We have developed networks of potential genetic regulatory interactions through time-series analysis based on the data from our studies. An algorithm for combining gene position information, clustering, and …
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Intelligent Monitoring of Powerline Vibrations - Sparse Sensing and Predictive Modeling Approach
… as passive dampers, often lack adaptability to changing environmental conditions and fail to provide real-time insights into the dynamic behavior of conductors. This thesis presents a data-driven framework for real-time monitoring and state estimation of vibration profiles in transmission lines, …
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Global change effects on ant-mediated seed dispersal
… effects of warming under simulated precipitation conditions altered under predicted climate change. Finally, Chapter 5 describes my general conclusions from this body of work. Taken together, the research making up my dissertation provides valuable insights into how changing environmental …
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Characterizing the effects of ocean acidification in larval and juvenile Manila clam, Ruditapes philippinarum, using a transcriptomic approach
… that inhabit these waters will have to cope with changing environmental conditions through the appropriate modulation of physiological processes. Calcifying organisms are particularly at risk, as increased atmospheric levels of CO2 in the atmosphere increase the partial pressure of CO2 (pCO2) in …
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Molecular mechanisms underlying avian metabolic variation: a genomic approach
… organisms to mount physiological responses to changing environmental conditions. Comprised of two investigations, it focuses on the molecular mechanisms underlying variation in avian aerobic performance. In the first, I explore regulatory changes that act on relatively short time periods, …
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Computerized feedback control of an environmental chamber
Most existing environmental chambers cannot simulate dynamically changing environmental conditions. Hence there is a need for a dynamically controlled artificial environment for plant studies. This project demonstrates the control of temperature, humidity and SO₂ concentration in a Continuous …
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Factors controlling the mobility of shingle beaches, with particular reference to the north Kent coast
… allows shingle beaches to respond rapidly to changing environmental conditions, it often also results in localised erosion. This leads to the lowering of beach levels and a subsequent reduction in the level of protection afforded to the shoreline. Numerical modelling techniques have been used …
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Comparing simple and complex native forage mixtures for grazing cattle in southwestern Saskatchewan
… improved persistence, ability to adapt to changing environmental conditions, reduced fertilizer costs, improved root mass and greater soil carbon sequestration but do they improve forage and animal production. The objective was to determine if complex native forage mixtures provide superior …
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Modern Foraminiferal Assemblages of the Denmark Strait
… relative abundance, and short response time to changing environmental conditions make foraminifera ideal proxies for environmental change. Benthic foraminifera are a valuable but poorly understood paleobiological proxy for the reconstruction of environmental conditions on continental shelves …
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Analysis of deployable strut roof structures
… whether in the sense of adapting to changing environmental conditions or being adapted for repeated transportation and deployment. These features make deployable structure highly desirable for a wide range of applications in the aerospace, military, and architectural fields. However, …
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