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 16 of 16 for “"environmental stochasticity"”.
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Spillover Modelling and Dynamics in Multi-Host Pathogens Transmission
… in a single host species. Two kinds of stochasticity, namely demographic and environmental stochasticity, are incorporated. We find population-size-dependent shift in the relative influence of demographic and environmental stochasticity on disease dynamics. By developing a basic …
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Non-invasive monitoring for population assessments of a critically endangered Neotropical primate
… a high risk of extinction due to demographic and environmental stochasticity. Despite the conservation status of the species and its urgent need for management and conservation based on scientific evidence, some muriqui populations are poorly studied and/or remain neglected due to the difficulties …
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Adult demography and larval processes in coastal benthic populations intertidal barnacles in Southern California and Baja California
… the Punta Baja population is more susceptible to environmental stochasticity and more prone to local extinction than populations located further north. This thesis emphasizes the importance of characterizing factors that affect the dynamics of benthic populations at mUltiple spatial-temporal …
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Economic behavior from an evolutionary perspective
… but seeds necessary for successfully coping with environmental transformations. Furthermore, there is an optimal degree of irrationality in the population depending on the degree of environmental stochasticity. When applied to evolutionary biology, we show that what appears to be group selection …
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Mark-recapture statistics and demographic analysis
… prevent the declining trend, and (3) demographic stochasticity is a more important factor influencing their long-term viability than environmental stochasticity.
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Regional Rarity: Consequences of Dispersal Limitation and Strategies for Reintroduction
… level processes such as demographic and environmental stochasticity. Yet, our understanding of species rarity remains limited since few studies have examined how these factors act in concert. This dissertation examines how these mechanisms may interact to influence the distribution and …
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The use of ringing data in the study of climatic influences on common passerines
… we need to determine the impact of climatic stochasticity on demographic rates. This thesis used available long-term ringing data collected by volunteers, augmented by data from research projects, to investigate the influence of climatic variation on survival of 10 common passerines in …
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Regulatory and Economic Consequences of Empirical Uncertainty for Urban Stormwater Management
… SCMs, as a result of measurement error and environmental stochasticity. The impacts of this uncertainty are discussed in the context of the large number of structural SCMs prescribed in TMDL Implementation Plans. The outcomes of this dissertation emphasize the challenge that empirical …
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Efficient Bayesian Nonparametric Methods for Model-Free Reinforcement Learning in Centralized and Decentralized Sequential Environments
… for uncertainties, including those caused by environmental stochasticity, sensor noise and communication restrictions. These challenges exist in missions such as planetary navigation, forest firefighting, and underwater exploration. Ideally, good control policies should allow the agents to …
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Optimal Management Of Biological Populations
… is essential to both the world's economic and environmental wellbeing. This includes controlling invasive species and sustainably harvesting biological resources for profit. In the first chapter we consider monitoring programs for the management of invasive populations that we wish to …
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Macroscopic insights from mechanistic ecological network models in a data void
… or non-inclusion of community dynamics and environmental stochasticity. I introduce bioenergetic network models that bring together for the first time many of the fundamental structures and mechanisms of species interactions present in real ecological communities. I then use these models to …
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Evaluating the Effectiveness of Population Reconstruction for Black Bear (Ursus americanus) and White-Tailed Deer (Odocoileus virginianus) Population Management
… of conditions. I evaluated the effects of stochasticity on reconstruction population estimates by incorporating different levels of environmental stochasticity (i.e. process error) and measurement error in the generated or "known" population. I also evaluated the effects of collapsing age …
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Population Dynamics of Willow Flycatchers in the Sierra Nevada
… and that these factors were influenced by environmental stochasticity, population dynamics, and interactions between meadow-area effects and riparian shrub density. Improvements to the riparian ecosystem through restoration of natural hydrologic regimes and protection of riparian shrubs …
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Genetic Dissection of Anthropogenic Impacts on a Declining Antarctic Fur Seal Population
… they are more susceptible to demographic and environmental stochasticity but also because the resulting decrease in genetic diversity can reduce their adaptive potential. However, many questions remain as to how demography and genetic diversity are linked and how genetic factors contribute to …
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Predictive Processing Alterations in Psychosis Across Illness Stage, Hierarchical Level and Thematic Domain
… maintain an adaptive model in the face of environmental stochasticity. Functional neural correlates of behaviour on this task, though broadly replicated in my larger sample, were not similarly affected in patients as they had been under ketamine. Instead of ketamine’s broad disengagement of …
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Spatial Patterns and Population Performance of Mule Deer: Responses to Water Provisioning in Mojave National Preserve, California
… study was needed to account for factors such as environmental stochasticity encountered in Cain et al.'s (2008b) research or the design flaws inherent in previous research (Broyles and Cutler 1999, Rosenstock et al. 2001). The goal of my research was to identify the effects of water developments …