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 30 for “"Evolutionary potential"”.
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THE ECOLOGICAL IMPORTANCE AND EVOLUTIONARY POTENTIAL OF PHENOTYPIC PLASTICITY IN NOVEL ENVIRONMENTS
… is important because it can influence the evolutionary response. Specifically, if the functional trait and its plasticity have shared genetic control, their evolution would be tightly linked, which could speed up the rates of evolution if selection on both the trait and plasticity was …
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Evolutionary potential of a dispersal-restricted species in response to climate change
… to novel climate regimes. Here I evaluated the evolutionary potential of <em>Lasthenia fremontii</em>, an annual plant species restricted to ephemeral wetlands called vernal pools in California to adapt to the projected patterns of climate change. Across <em>L. fremontii</em> distribution there …
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Phylogeographic and environmental DNA analysis of the mudpuppy (necturus maculosus maculosus)
… allows for informed management that preserves evolutionary potential. Informed management becomes crucial as genetic diversity declines and species become susceptible to threats such as climate change. For some species, it can be difficult to determine whether extant populations persist in an …
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Mechanisms Maintaining Additive Genetic Variance in Fitness in Red Squirrels
… variance (Va) in fitness and limit future evolutionary potential. Sexual antagonism and temporal fluctuations in selection are mechanisms that could maintain Va in fitness. Maternal genetic effects could be an additional source of adaptive genetic variation. I used ‘animal models’ to …
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Individual-Level Causes and Population-Level Consequences of Variation in Fitness in an Alpine Rodent
… of variation in fitness components, and the evolutionary consequences of this variation in a wild rodent population. It shows the contemporary genetic evolution of body mass and decouples classic estimates of selection from adaptive evolution. The heart of evolutionary biology is …
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Evolution of asexuality in Daphnia pulex: Implications of mitochondrial-DNA analysis.
… for the evaluation of the ecological and evolutionary potential of asexuals. The observed distribution of asexuals may reflect intrinsic genetic constraints rather than an optimization of breeding strategy by natural selection.Dept. of Biological Sciences. Paper copy at Leddy Library: …
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Redevelopment options for the O Street Market site, Washington, D.C.
… stands in stark contrast to that proffered by a potential developer is to stimulate the search for and discussion of additional alternatives. The alternative image presented arises from a redefinition of the problem based on an analysis of the time cycles that affect the project and on an …
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EPIDEMIOLOGY AND POPULATION GENETICS OF THE GRAPE POWDERY MILDEW CAUSAL FUNGUS, ERYSIPHE NECATOR, AND ITS RELATION TO COMMERCIAL DISEASE MANAGEMENT
… mixed mode of reproduction contributes to a high evolutionary potential to overcome disease management methods; powdery mildews have been shown numerous times to overcome host resistance and several fungicide groups within a couple years of deployment. For this study, Amplicon Sequencing (AmpSeq) …
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Long-term dynamics and theoretical considerations in coral holobiont adaptation
… Together, these results demonstrate that the evolutionary potential of the coral host cannot be overlooked, as holobiont reassembly alone will likely not create more robust reefs.
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Sex, Diversity, and Differentiation Within and Between Populations of an Aquatic Hyphomycete
… pertaining to the natural histories and evolutionary potential of these ecologically important fungi. (1) Is genetic recombination contributing to genotypic diversity of this fungus? (2) How is genotypic diversity distributed among populations of this fungus? (3) Is genotypic diversity …
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A biosystematic study of the rare plant <i>Paronychia virginica</i> Sprengel (Caryophyllaceae) employing morphometric and allozyme analyses
… of the U.S. in order to preserve the genetic and evolutionary potential of these taxa.
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Detectability, movement, and population structure of the endangered Candy Darter in Virginia
… were less than the recommended 500 to maintain evolutionary potential, but three populations numbered > 130, indicating they may be viable options for source populations for translocations. My results suggest that all populations may benefit from translocations to overcome genetic drift and …
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Constraints on the adaptive potential of ectotherms to climate change
… rely heavily on temperature. While rapid evolutionary adaptation has been proposed as a potential pathway to survival, the adaptive potential of ectotherms may be inherently limited by evolutionary constraints. In this dissertation, I combine theoretical and empirical approaches to …
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On Epitope-Paratope Interactions of Emerging to Endemic Viruses
… an emerging to an endemic virus with unknown evolutionary potential. Though highly differentiated, these three viruses present a common challenge to society in the need to continually prepare for and rapidly respond to new outbreaks, novel variants, and persistent antigenic drift. Through …
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Understanding the Speciation of Ruthenium Arene Complexes as Precursors to Unnatural Enzyme Cofactors
… arene complexes when exposed to the many potential Lewis basic ligands provided by protein scaffolds. Combining nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry (MS), X-ray crystallography and other biophysical characterisation techniques, the speciation of ruthenium arene …
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The role of parents in Evolution
… and so are in prime position to influence evolutionary processes. I used an experimental approach, and focused on the burying beetle, $\textit{Nicrophorus vespilloides}$. The burying beetle is a perfect system for this question: they exhibit elaborate biparental care which is correlated …
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Genetic diversity and divergence within and among natural populations of Araucaria in eastern Australia
… over the past few centuries in Australia, thus potentially exacerbating any genetic effects of historical fragmentation, little is known on the effects of these practices on the genetic diversity and divergence of their extant populations. However, for most plant species, the genetic effects of …
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Barley pathogens in Iceland: Identification, virulence and genetic structure of major barley pathogens in Iceland
… teres as high risk pathogens with considerable evolutionary potential. It is therefore recommended to use quantitative resistance along with major gene resistance in cultivar mixtures and multilines in breeding projects for durable resistance to R. secalis and P. teres in Iceland.
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Molecular basis of the evolution of new protein functions: Kemp elimination and phosphoryl transfer reactions
… of single amino acid mutations, typical of an evolutionary trajectory, can result in dramatic changes in catalytic activity, specificity and protein solubility. Various strategies were employed to achieve this aim, including analysis of existing literature concerning the various models and …
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Molecular basis of the evolution of new protein functions: Kemp elimination and phosphoryl transfer reactions
… of single amino acid mutations, typical of an evolutionary trajectory, can result in dramatic changes in catalytic activity, specificity and protein solubility. Various strategies were employed to achieve this aim, including analysis of existing literature concerning the various models and …
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