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 31 for “"Genetic Connectivity"”.
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Faunal biogeography, community structure, and genetic connectivity of North Atlantic seamounts
… broad community patterns were discernible at a genetic level, the 16S mtDNA gene was utilized as a genetic “barcode” within the Class Ophiuroidea, through which 22 putative species were identified, including four target species (Asteroschema clavigera, Ophiocreas oedipus, Ophioplinthaca …
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Faunal biogeography, community structure, and genetic connectivity of North Atlantic seamounts
… broad community patterns were discernible at a genetic level, the 16S mtDNA gene was utilized as a genetic "barcode" within the Class Ophiuroidea, through which 22 putative species were identified, including four target species (Asteroschema clavigera, Ophiocreas oedipus, Ophioplinthaca …
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Using simulations to predict the genetic connectivity of the Mojave desert tortoise
… of anthropogenic development on the range-wide genetic connectivity of the Mojave desert tortoise. In Chapter 1, I describe the quadtree R package, which implements the region quadtree data structure in C++ and makes it available to the R programming environment - using this data structure …
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Genetic connectivity, adaptation, and phenotypic plasticity of corals and anemones under thermal stress
… and the northeast Phoenix Islands maintain genetic diversity indicating recruitment from nearby reefs may occur. Yet, they show significant genetic differentiation (FST) from farther areas, suggesting this dispersal may be limited. Thermal variability in this region may also favor plasticity …
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Connecting the Plots: Anthropogenic Disturbance and Mojave Desert Tortoise (Gopherus agassizii) Genetic Connectivity
Habitat disturbance impedes connectivity for native populations by altering natural movement patterns, significantly increasing the risk of population decline. The Mojave Desert historically exhibited high ecological connectivity, but human presence has increased recently, as has habitat …
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Genetic connectivity, adaptation, and phenotypic plasticity of corals and anemones under thermal stress
… and the northeast Phoenix Islands maintain genetic diversity indicating recruitment from nearby reefs may occur. Yet, they show significant genetic differentiation (FsT) from farther areas, suggesting this dispersal may be limited.
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Ecological and Genetic Connectivity of Shrews (Sorex spp.) across Interstate-90 in the Washington Cascade Range
… crossing structures to increase ecosystem connectivity as part of this project. The goal of my study was to investigate shrews – very small mammals with presumably low mobility and dispersal capacity – at sites on the eastern slopes of the Cascade Range where wildlife crossing structures …
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Toadal Isolation: Genetic Connectivity of the Western Toad (Anaxyrus boreas) along I-90 in the Snoqualmie Pass Area of Washington State
… polymorphisms (SNPs) were used to assess the genetic connectivity of western toad (<em>Anaxyrus boreas</em>) breeding populations along Interstate-90 near Snoqualmie Pass, WA. Sites north and south of the freeway were sampled during the breeding season of 2019. SNP loci were subsequently …
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Population genetic and phylogeographic insights into the phyllosomal odyssey
The spatial and temporal scale of genetic connectivity influences ecological and evolutionary processes ranging from metapopulation dynamics to species diversification. The majority of marine species maintain genetic connectivity through pelagic propagules, and propagule duration is hypothesized to …
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Influence Of Landscape On Gene Differentiation In The American Pika (Ochotona princeps) Within The Interstate 90 Snoqualmie Pass Corridor
… populations. Our study used GIS tools to compare genetic connectivity among 13 American pika (<em>Ochotona princeps</em>) habitat patches across an approximately 77 square km area adjacent to Interstate 90 near Snoqualmie Pass, WA. Tissue samples were collected from 85 individuals and genotyped at …
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Assessing the threat of non-native salmonids to Lahontan cutthroat trout recovery in a subalpine watershed
… reintroduction program. I investigated the genetic population structure and connectivity of naturalized rainbow and brown trout throughout the Glen Alpine Creek watershed including Fallen Leaf Lake in order to assess the threats posed by these non-native fishes. Fin clips were collected from …
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Spatiotemporal population genomics of marine species : invasion, expansion, and connectivity
… by a range expansion, during which strong genetic drift is hypothesized to result in decreased genetic diversity with increased distance from the center of the historic range, or the point of invasion. In this dissertation, population genetic and genomic tools are used to approach complex …
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Significant Population Structure and Little Connectivity in South African Rocky Shore Species: Implications for the Conservation of Regional Marine Biodiversity
… is not protecting a representative sample of the genetic diversity among marine species nor is it sufficiently genetically connected via dispersal and gene flow to ensure their long-term persistence. To test a number of questions regarding the distribution of genetic diversity and degree of …
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Spationtemporal population genomics of marine species : invasion, expansion, and connectivity
… by a range expansion, during which strong genetic drift is hypothesized to result in decreased genetic diversity with increased distance from the center of the historic range, or the point of invasion. In this dissertation, population genetic and genomic tools are used to approach complex …
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Genetic population structure and dispersal of two North American woodpeckers in ephemeral habitats
… patches. In this research, I used patterns of genetic variation to estimate the dispersal dynamics of black-backed woodpeckers (Picoides arcticus), a fire specialist, and compared these patterns to hairy woodpeckers (Picoides villosus), a generalist. I then examined how frequent colonization of …
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Genetic population structure and dispersal of two North American woodpeckers in ephemeral habitats
… patches. In this research, I used patterns of genetic variation to estimate the dispersal dynamics of black-backed woodpeckers (Picoides arcticus), a fire specialist, and compared these patterns to hairy woodpeckers (Picoides villosus), a generalist. I then examined how frequent colonization of …
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Biodiversity and Biogeography of Deep-Sea Gastropod Mollusks from the Pacific Costa Rica Margin
… floor. Yet, investigations into the diversity, genetic connectivity, and biogeography of life at such ecosystems are still ongoing. The present dissertation explores the diversity and biogeography of deep-sea gastropod mollusks from hydrocarbon seeps at the Pacific Costa Rica Margin to …
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The influence of vicariance and dispersal on the diversification and evolution of springtails (collembola)
… the degree of cave-dependence. Estimates of genetic structure and divergence times also implicated climatic and geological processes involved in the formation of the modern Mississippi River valley as major factors driving the isolation of cave-obligate species, but cave-facultative species …
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Spatial and Temporal Patterns of Genetic Variation in Scarlet Macaws: Implications for Population Management in La Selva Maya, Central America
… by elucidating the degree and distribution of genetic variation, historical and contemporary processes driving differentiation, and individual behavior patterns. These critical biological parameters create a framework to enhance wildlife management initiatives, as illustrated here through the …
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Conservation genetics of African elephants
… that aim at maintaining or restoring spatial and genetic connectivity between populations. In this thesis, I use a conservation genetic approach to study African elephant populations with the aim of developing methodologies and providing applications that could inform conservation planning for …
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