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 15 of 15 for “"Genetic Isolation"”.
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The Effects of a Reservoir on Genetic Isolation in Two Species of Darters
… determine if reservoirs restrict migration, the genetic diversity of two species of darter, the rainbow darter <i>Etheostoma caeruleum</i> Storer and the Highland Rim darter <i>Etheostoma kantuckeense</i> Ceas and Page, was determined from populations inhabiting the Barren River Lake drainage …
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Engineering genetic isolation in Escherichia coli and developing synthetic genomics tools to efficiently assemble megabase-scale genomes
… of E. coli allowed for the compression of its genetic code. However, DNA synthesis at the genome scale is not yet a mature technology. Our ability to synthesise genomes is still limited in both speed and scale. Chapter 2 - Refactoring the genetic code enables bi-directional genetic isolation …
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Co-existence in the Phoebetria albatrosses at Marion Island
… space is likely to be most acute. Secondly, the genetic isolation of the two species is investigated, as co-existence implies increased interspecific social interaction with associated increased possibilities of hybridization. Thirdly, the two species' possible evolutionary histories are examined …
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The Prince or the Depauperate? Population Genetics of the Rare, Closed-flower Erica occulta
… species and determining its breeding system and genetic diversity may inform the best method of conservation. The aims of this study were to determine the genetic diversity of E. occulta and how it varies with distance and to make inferences about the breeding system and gene flow based on …
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Scale dependent genetic structure of Idaho Giant salamanders (Dicamptodon aterrimus) in stream networks
… of life-history influences on population genetic structure may provide general insight. I examined how stream network structure affects gene flow and genetic structure of the facultatively paedomorphic Idaho Giant salamander, Dicamptodon aterrimus in Idaho and Montana, USA. I used …
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Scale dependent genetic structure of Idaho Giant salamanders (Dicamptodon aterrimus) in stream networks
… of life-history influences on population genetic structure may provide general insight. I examined how stream network structure affects gene flow and genetic structure of the facultatively paedomorphic Idaho Giant salamander, Dicamptodon aterrimus in Idaho and Montana, USA. I used …
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Gene Flow and Dispersal Among Populations of the Stonefly <i>Peltoperla tarteri</i> (Plecoptera: Peltoperlidae) in the Southern Appalachians
… directly using traditional means; however, genetic markers provide an ideal method for estimating stream insect dispersal. In this study, the control region of mitochondrial DNA was used to study gene flow and dispersal among populations of the stonefly <i>Peltoperla tarteri</i> in the …
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Historical and Geographic Context for the Evolution of Climate Niche Breadth in Temperate Plants
… difference, geographic distance and genetic isolation among European plants, I show that the effect of allopatry on niche breadth depends on the role of the geographic distance among populations. The remaining projects focus in increasingly finer detail on the evolution of niche …
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The Ecology and Evolution of Rare, Soil Specialist Astragalus Plants in the Arid Western U.S.
… As a case study of the potential population genetic consequences of specialization, I examined the genetic structure and diversity of two allopatric cryptic sister species of <em>Astragalus</em>. Despite known low pollen and seed dispersal and strong genetic isolation by distance, populations …
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DNA systematic studies in the genus Bromus L. (Poaceae)
… endonuclease analyses were used to assess phylogenetic relationships between different subgenera of Bromus, a genus of over 100 diploid and polyploid species. Variation in chloroplast DNA (cpDNA) fragment pattern was examined, initially, in 15 species of subgenera Festucaria and Ceratochloa. …
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Dispersal, gene flow, niche divergence and local adaptation in the hyper-diverse ruschioid Aizoaceae: testing alternative modes of speciation in the Knersvlakte quartz field flora of the Succulent Karoo, South Africa
… community structure, ecological isolation and niche divergence in these and other quartz field species, made it possible to tease apart the roles of local adaptation and limited dispersal in driving gene flow and speciation in the system. Quartz fields were found to be a highly …
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Intraspecific Variation Among Emerald Shiners (Notropis atherinoides) of the Missouri River
… sites, 2) the differences were related to a genetic population structure, 3) the differences were correlated with habitat types, and 4) if the differences provided a measurable performance advantage. Emerald shiners were collected from both reservoir and river habitats. Differences in body …
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Ecological role and conservation status of the endangered, native Fijian free-tailed bat (Mops bregullae, Felten 1964) in fragmented forest habitats
… approach combining temporo-spatial surveys and genetic analyses to address critical ecological knowledge gaps for M. bregullae across fragmented landscapes and islands of Fiji and Vanuatu. Using this approach and guided by conservation intentions, it assessed the question: Could Mops bregullae …
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Variations of Wildlife Safety Crossings and Their Effects for Mule Deer in Northeast Nevada
… overpasses to provide connectivity and prevent genetic isolation. Conservation Biology. 23:548-556.deBruyn, A. M. H., and J. J. Meeuwig. 2001. Detecting lunar cycles in marine ecology: periodic regressions versus categorical ANOVA. Marine Ecology Progress Series. 214:307-310. Ford, A. T., A. P. …