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 23 for “"individual based models"”.
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New-generation individual based models for infectious diseases transmission
Mathematical models are powerful tools for simulating plausible epidemic spread scenarios and for evaluating the impact of control policies. They represent the scientific basis on which public health policy makers should take their decisions on the intervention strategies that should be performed …
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Issue of scale in individual-based models: applications in fungal and plant systems
… theoretical approach, in the form o f an individual-based (cellular automaton) model, is presented. Experimental results derived from small-scale systems are used to quantify parameters of the model; results from large-scale experimental systems serve to test the model. The theoretical …
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Modelling animal movement in heterogeneous environments: from statistical inferential models to individual-based models
… the observational and process scales of movement models. First I extended the conceptual framework of movement ecology developed by Nathan et al. (2008) which depicts the interplay among four basic mechanistic components of movement (the internal state, motion, and navigation capacities of the …
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Ecological variability in coastal oceans : simulating biological-physical interactions with Lagrangian Individual-based models
In dieser Dissertation wird der Effekt biologisch-physikalischer Interaktionen auf zwei fundamentale Prozesse in küstennahen Ökosystemen mit Hilfe Individuenbasierter Modelle untersucht. Die Dynamik der Phytoplankton Frühjahrsblüte wurde in zwei aufeinanderfolgenden Jahren auf einem …
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Linking individual-based models and dynamic energy budget theory : lessons for ecology and ecotoxicology
… of ecological risk assessment of chemicals, individual-based population models hold great potential to increase the ecological realism of current regulatory risk assessment procedures. However, developing and parameterizing such models is time-consuming and often ad hoc. Using standardized, …
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Predicting the effect of environmental change on wading birds: insights from individual-based models.
… changes. This thesis looks into how we can use individual-based models (IBM) to make accurate predictions of how wading birds are affected by environmental change. Starting with previously validated models I show the importance of measuring size of invertebrates though an IBM investigation into …
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Modeling the processes affecting larval haddock (Melanogrammus aeglefinus) survival on Georges Bank
… Spatially explicit coupled biological-physical individual-based models are ideal for studying the processes of feeding, growth, and predation during the larval stage. This thesis sought new insights into the mechanisms controlling the recruitment process in fish populations by using recent …
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Modeling the processes affecting larval haddock (Melanogrammus aeglefinus) survival on Georges Bank
… Spatially explicit coupled biological-physical individual-based models are ideal for studying the processes of feeding, growth, and predation during the larval stage. This thesis sought new insights into the mechanisms controlling the recruitment process in fish populations by using recent …
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An individual-based GPU simulation framework for collective bacterial dynamics in swarms and biofilms
… rich experimental data sets, we develop minimal individual-based models to uncover the governing forces driving the dynamics in microbial systems. Our model incorporates the biophysical processes of cell growth and division, viscous drag, bacteria self-propulsion, and mechanical cell-surface and …
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Trait-based modeling of larval dispersal in the Gulf of Maine
… they do not provide a comprehensive assessment. Individual-based models (IBMs) that couple ocean circulation and particle-tracking models provide a unique ability to examine larval dispersal patterns with high spatial and temporal resolution. Obtaining accurate results with IBMs requires …
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Modelling collective motion in animals and the impact of underlying social networks
… phenomena have received wide attention. Individual-based models are a popular and promising approach to investigate and explain features of animal collective motion. The first part of this thesis gradually develops a novel modelling framework for the collective motion of animals and …
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Forest dynamics at regional scales: predictive models constrained with inventory data
… changing climate is uncertain. Forest simulation models make landscape-level predictions of forest dynamics by scaling from key tree-level processes, but models typically have no climate dependency. In this thesis I demonstrate how large-scale national inventories combined with improvements in …
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Trait-based modeling of larval dispersal in the Gulf of Maine
… they do not provide a comprehensive assessment. Individual-based models (IBMs) that couple ocean circulation and particle-tracking models provide a unique ability to examine larval dispersal patterns with high spatial and temporal resolution. Obtaining accurate results with IBMs requires …
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Parasitism, Predation Prediction: Modelling Variations in Ecological Interactions from Mechanisms to Networks
… a framework for creating efficient predictive models, which summarizes the three main stages of the modelling process – (1) Framing the Question; (2) Model-Building and Testing; and (3) Uncertainty Evaluation – and outlines stage-specific interdisciplinary strategies designed to improve the …
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The importance of density-dependent mechanisms in determining cohort survival in largemouth bass
… growth and survival of largemouth bass. Individuals hatched relatively early have a period of growth prior to the swim-up of later-hatched cohorts allowing them to switch to piscivory at an earlier date due to release of gape limitations. Otolith and microsatellite data suggest that …
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A comparison of individual-based and matrix projection models to applied to fish population and community dynamics
Matrix projection models and individual-based models (IBM) are commonly used for the analysis and management of fish populations. Matrix models break down the population into age or stage classes, while IBMs track individuals. I perform a series of quantitative comparisons between the predictions …
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Species-oriented model approaches to Daphnia spp.: linking the individual level to the population level
Die Gattung Daphnia nimmt eine zentrale Position im pelagischen Nahrungsnetz vieler Standgewässern (Seen, Talsperren) ein. Aufgrund hoher Filtrierleistungen sind Daphnien für das integrierte Gewässermanagement, z.B. im Rahmen einer Nahrungskettenmanipulation (Biomanipulation), von großem Interesse. …
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Why it takes all kinds: diversity mechanisms and patterns in ecological communities
This work explores the effect of diversity of individuals on a community. The mechanisms generating diversity are explored, their effects on patterns of diversity are examined, and the impact of diversity on community properties (such as productivity and stability) is investigated. Three …
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Modelling and empirical approaches for predicting the invasiveness of alien species.
… could be resisted by the native community. Individual-based models (IBMs) were used, with approximate Bayesian computation (ABC) successfully applied in Chapter 2 to recreate an ongoing invasion and then predict the range expansion of the species. This model was then used in Chapter 3 to …
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Modeling the effects of environmental and ecological processes on the transport, mortality, growth and distribution of early stages of Cape Anchovy (Engraulis Encrasicolus) in the Benguela system
An individual based modelling approach was used to study environmental factors and processes influencing the early life history of anchovy in the southern Benguela region and on the Agulhas Bank. The intention was to then establish the link between these factors and processes and the recruitment …
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