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 42 for “"resource competition"”.
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Resource competition in CRISPR-mediated gene regulation
… dCas9 protein among multiple gRNAs, leading to resource competition. In turn, competition between gRNAs for the same resource may hamper network function. In this thesis, we develop a general model that takes into account the sharing of limited amounts of dCas9 protein for arbitrary …
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Resource competition and soft selection in Sabatia angularis
Intraspecific competition is a primary ecological interaction in plant populations, and competitive interactions for limited resources in turn are an important driver of natural selection, setting the stage for eco-evo feedbacks. Such feedbacks are likely when the competitive neighborhood …
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Measuring and Analyzing Resource Competition in Genetic Circuits
… of genetic circuits is hampered by resource competition between genetic circuit parts, where separate genetic parts become coupled due to individual parts competing for the use of shared cellular resources necessary for the part's function such as ribosomes. These resource …
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Fight and flight: Behavioural drivers and evolutionary consequences of resource competition in birds
Animal competition determines the allocation of resources required for individual survival and reproductive success. These consequences of competition drive selection for traits that confer competitive advantages. While previous studies have quantified effects of fundamental behaviours on …
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The Effect of Area on Resource Competition among Migrant Birds at a Stopover Site
Few studies have focused on the habitat and resource requirements of migratory landbirds along migration routes. Habitat fragmentation may exacerbate the costs of migration by reducing food availability and/or increasing competition at crowded stopover sites. I predicted that smaller forest …
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<i>Trichodesmium</i> spp.: Numerical Studies of Resource Competition, Carbohydrate Ballasting, and Remote-Sensing Reflectance
… and issues of macronutrient resource competition; (2) carbohydrate ballasting by <em>Trchodesmium </em>and implications for the formation of surface accumulations; and (3) the vertical distribution of <em>Trichodesmium</em> and implications for detection from space.</p> <p>The …
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Potential for resource competition between the boodie (Bettongia lesueur) and mala (Lagorchestes hirsutus) in the fenced Matuwa reserve, central Western Australia
… species can stably coexist by partitioning resources along at least one of three niche dimensions (food, space, or time), thereby reducing interspecific competition. However, resources are limited in fenced reserves and natural processes that regulate populations in response to resource …
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Influence of Detritus Levels and Organic Pollution on Interspecific Resource Competition, Oviposition Behavior, and Larval Survival of Two Tire-Inhabiting Mosquito Species (Diptera: Culicidae)
… survival of both species, and the effects of resource limitation, interspecific density, and chemical pollution on interspecific competition between both species. I conducted field oviposition bioassays in tires containing different pollution concentrations, and laboratory larval survivorship …
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Systems and control theoretic approaches to engineer robust biological systems
… robustly in practice. This thesis characterizes resource competition as a form of context dependence, and presents control theoretic approaches to engineer robust, context-independent gene networks. We first present a systems framework to model resource competition, which results in a hidden …
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Co-Design of Resource Limited Genetic Networks Tuning System Parameters to Satisfy Specifications
… (retroactivity), unknown interactions and resource competition, which is our focus for this work. Recent efforts to achieve modular design in systems with resource competition, have focused in adding additional machinery to the cell to either try to isolate the subsystems or control the …
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The Influence of Dense Understory Shrubs on the Ecology of Canopy Tree Recruitment in Southern Appalachian Forests
… growth and survivorship of Quercus seedlings, resource availability, and the rates / causes of seedling damage. I found that neither seed rain, nor seed bank density or species richness was inhibited by the presence of R. maximum or K. latifolia. Forest seed banks were dominated by sweet birch …
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Resources, Confusions, and Compatibility in Dual Axis Tracking: Displays, Controls, and Dynamics
… axis tracking is subject to separate effects of resource competition, confusions, and Wickens' compatibility of proximity principle.
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Competition between species can drive public-goods cooperation within a species
… on understanding the effect of interspecies competition on the evolution of cooperation within a species. We test this relationship by using sucrose metabolism of budding yeast as a model cooperative system. We find that when co-cultured with a bacterial competitor, yeast populations become …
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Ecological implications of allelopathic interferences with reference to Phragmites australis
… and invaded communities, direct and indirect resource competition, evolution or hybridisation, altered ecosystems processes, and allelopathy that may explain the invasion processes of plant species. Among these possible influences on invasion, allelopathy has received increased attention and …
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Anger and Punishment: Natural History and Normative Significance
… this problem, I appeal to an economic model of resource competition, which applies to organisms without strategic foresight. This model also explains several features of an aggression system in rodents. Second, I show that human anger derives from the same ancestral trait as this aggression …
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Impact of large mammal herbivory on the federally threatened plant, Scutellaria montana chapm (large-flowered skullcap) at a millitary training site, Catoosa County, Georgia
… indirect role through thinning by reducing resource competition between S. montana and other understory vegetation. During 2012, I investigated the effects of disturbances associated with prescribed burning and canopy thinning on impacts of herbivory to S. montana. Results did not indicate a …
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Analyzing the diet composition of Lake Trout (Salvelinus namaycush) in Upper Priest Lake
… such as predation, or indirect effects, such as resource competition. In this study our objective was to estimate the frequency of piscivory of Lake Trout from Upper Priest Lake and document any possible Lake Trout predation upon Bull Trout in the Upper Priest Lake system. We obtained Lake Trout …
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Resource constrained scheduling problem at U.S. Naval Shipyards
… Repairs of a nuclear U.S. submarine are resource constrained since resources are divided among approximately thirty shops (e.g. electricians, welders, and pipefitters). The system complexity, the tight spaces, the operational nuclear reactor, the challenges inherent in repair, and …
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Assessing the drivers of adaptive radiation in a complex of gall midges: A multitrophic perspective on ecological speciation
… Until recently, the focus has been on primary resource competition as a major driver of trait divergence in adaptive radiations. Here I consider the role of natural enemies specifically in driving trait divergence in a complex of gall midges in the nominal species <i>Asteromyia carbonifera</i> …
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Effect of nestling sex ratio on the provisioning behavior of adult Eastern Bluebirds (Sialia sialis)
… sialis</italic>) and attributed to local resource competition. To better understand this behavior, I studied the provisioning behavior of Eastern Bluebirds in Madison County, Kentucky, in 2004. I experimentally manipulated brood sex ratios in 24 bluebird nests, creating female-biased (N = …
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