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 37 for “"regime shifts"”.
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Tipping points, regime shifts and species interactions within shallow marine ecosystems
… shift to alternative states, a phenomenon termed regime shifts, and in extreme cases can collapse. Ecological regime shifts, or shifts between different ecological states, can be triggered by pulse disturbances (short term effects) or press pressures (longer term effects). However, understanding …
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Modelling regime shifts in the southern Benguela : a frame-based approach
… which has been shown to have undergone regime shifts during the past 50 years. Modelling regime shifts at an ecosystem scale can be of great importance in fisheries management, to aid in long-term planning and fishing strategy evaluation. Frame-based modelling has been successfully …
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The palaeolimnological record of regime shifts in lakes in response to climate change
Regime shifts in lake ecosystems can occur in response to both abrupt and continuous climate change, and the imprints they leave in palaeolimnological records allow us to investigate and better understand patterns and processes governing ecological changes on geological time scales. This thesis …
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Application of the sequential t-test algorithm for analysing regime shifts to the southern Benguela ecosystem
Long-term ecosystem changes, such as regime shifts, have occurred in several marine ecosystems worldwide. Multivariate statistical methods have been used to detect such changes, but they have to date not been applied to the southern Benguela ecosystem. A weakness of many of the methods is that they …
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The interacting hydrologic responses to changing climate, watershed physical characteristics, river regulation, and land development in the northeastern United States
… hydrologic responses due to changing climate and regime shifts of large-scale circulation patterns and their teleconnection patterns were evaluated using long-term precipitation and discharge records in sub-basins with no development, and extensive development and riverine impoundments of the …
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The Impacts of Biofuel Expansion on the Resilience of Social-Ecological Systems in Ethiopia
… systems, identifying potential trade-offs and regime shifts. Additionally, this research highlights the differentiated impacts for actors across multiple scales, allowing power relations to be taken into account – the lack of which is a common criticism of resilience studies. The thesis …
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International Capital Movements During the Napoleonic Wars and the Industrial Revolution in Britain
… of the time. Britain experienced a series of regime shifts, most importantly from a peace to a war (1793), from the gold standard to the paper pound by the suspension of cash payments (1797), from the war to a peace (1815) and from the paper pound to the gold standard (1821). These regime …
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Predicting the effect of environmental change on wading birds: insights from individual-based models.
… invertebrates though an IBM investigation into regime shifts and wading birds responses. The models show that by altering their diet preferences, birds adapt to regime shifts in their prey but that this maintenance of population size masks the true changes in the system and limits the use of …
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Environmental changes and regime shift analysis in the southern Benguela using output from earth system models
… using the sequential t-test algorithm for regime shift detection (STARS), in an attempt to detect any abrupt, long-term shifts. Projections under SSP1-2.6 tended to follow their historical trajectories, and displayed gradual changes over time. Under SSP5-8.5, however, future projections …
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Essays on Macro-Finance Relationships
… structure of interest rates is influenced by regime-shifts in monetary policy. To do so, we develop and estimate an arbitrage-free dynamic term-structure model which accounts for regime shifts in monetary policy, volatility, and the price of risk. Our results for U.S. data from 1985-2008 …
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A Dynamic Risk Management Framework for Water and Environmental Sustainability
… over time and space. These risks involve regime changes and shifts, throughout which one observes the transition of water availability from prolonged dry periods to prolonged wet periods. Ensuring reliability of water supply under these hydrological regime shifts involves understanding how …
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Climate variability in social-ecological systems of the Southern Cape: integrating farming and fishing perspectives
Large scale shifts playing out on global climate levels are manifesting locally in the South Africa’s terrestrial and marine ecosystems, where it is difficult to predict how different habitats may respond to these changes in natural systems, particularly at local levels. For example, the highly …
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Effects of calendar time, temperature and growing degree-day on Pacific Herring (Clupea pallasii) length-at-age
… variability in herring LaA such as ocean regime shifts influencing prey quality and quantity, environmental pressures (e.g., seawater temperature), and impacts from size-selective fishing that may affect population recovery of this species.
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Applications of machine learning in finance: analysis of international portfolio flows using regime-switching models
… of machine learning in quantitative finance, regime-switching models are applied to analyse and extract information from international portfolio flows. Regime-switching models capture properties of international portfolio flows previously found in the literature, such as persistence in flows …
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Firestorms in a mesic savanna-forest mosaic
… vegetation and present evidence for catastrophic regime shifts in these mosaic systems. What sets it apart from previous research is the boundary between vegetation types is naturally occurring, not the result of logging within forests and the subsequent damage by fire. In HiP, forest patches …
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Functional structure of herbivorous fish communities in the Wakatobi National Park, Southeast Sulawesi
… resilience to disturbances in particular to regime shifts to algae dominated states. The importance of understanding the functional role of key taxa in maintaining coral reef biodiversity and resilience is now more important than ever as acute and long-term environmental change threatens …
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Responses of boreal fire regimes to climatic and land-cover changes: perspectives from multiple spatiotemporal scales
… role in maintaining boreal forests, fire-regime shifts can have large ecological and socioeconomic repercussions. Understanding the patterns and controls of forest fires is crucial for anticipating future fire-regime shifts at local to regional scales. To assess top-down (climate) and …
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The Evolution and Impact of Weddell Sea Deep Water
… is of utmost importance in order to distinguish regime shifts from natural variability and to predict the future pathway of ocean circulation under the influence of anthropogenic climate change.
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Everything Is Drag: The Politics of Performing Beautiful Women in Cold War Chile
… in Chile under changing Cold War political regimes from 1950-1990. Drawing on deconstructionist and performance approaches, I consider the multiple, changing ways Cold War Chilean cisgender and transgender women performed their femininity as part of racialized nationalist projects, analyzing …
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