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 “"comparative phylogeography"”.
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Comparative Phylogeography of Central African Duikers Using Non-invasive Sampling Methods
<p>The present study sets out to assess patterns of evolutionary diversification in central African duikers (subfamily Cephalophinae). The sampling strategy consisted of collecting geo-referenced duiker feces across 43 sites and seven countries. However, several challenges related to the use of …
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Comparative Phylogeography of Glassfrogs (Vitreorama) Endemic to the Brazilian Altantic Rainforest
<p>The Brazilian Atlantic Forest harbors one of the most diverse faunas of the world, including 2-3% of all known vertebrate species. Understanding the role of both climate and landscape in shaping current biodiversity patterns has been the focus of many recent phylogeographic studies. Here I …
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Comparative phylogeography as an integrative approach to understand human and other mammal distributions in Europe.
Phylogeography refers to the phylogenetic analysis of organisms in the context of their geographical distribution. The analytical methods build phylogenetic trees and networks from haplotypes in order to investigate the history of the organisms. Phylogeographic studies have revealed the importance …
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THE WORLD ACCORDING TO GARS: THE MOLECULAR SYSTEMATICS AND COMPARATIVE PHYLOGEOGRAPHY OF LIVING GARS (ACTINOPTERYGII: LEPISOSTEIDAE)
There are seven living species of gars in two genera (Lepisosteiformes: Actinopterygii). In my first chapter, I estimate phylogenetic relationships among six of them using DNA data generated from four complete mitochondrial loci (cytb, CR, 12S, and 16S) and a single, partial nuclear …
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Comparative Phylogeography of Eastern Chipmunks and White -Footed Mice: Population Histories Since the Last Glacial Maximum
Finally, analyses of variation at 6 microsatellite loci among 210 P. leucopus from three sites each around three of the largest cities in Illinois recovered reduced levels of gene flow among sites separated by urban development compared to sites separated by deciduous forest habitat. Mitochondrial …
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Tracking thicket through space and time : insights into the evolutionary history of the Albany Subtropical Thicket from comparative phylogeography and distribution modelling
… and species distribution models with multigene comparative phylogeography of three AST species Pappea capensis, Nymania capensis, and Schotia afra. Distribution models support the glacial refugia hypothesis, with highly reduced and fragmented distributions postdicted for the Last Glacial …
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On the Distribution of Genetic Variation in Ecological Communities
… by isolated disciplines (e.g. macroecology, comparative phylogeography, macroevolution) using tools and data that tend to focus on only one axis of community scale data (e.g. phylogenies, relative abundances, and/or trait information). Yet we know that there are feedbacks among processes that …
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A conservation genetic study of threatened, endemic southern African seabirds
… might respond to further environmental changes. Comparative phylogeography, combined with capture-mark- recapture models based on ringing data and annual census counts, provide the most complete picture of the micro-evolutionary forces at play in this unique ecosystem, and highlight seabird …
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Looking into the Past: The Diversification of Amphibians in the Neotropical Savannas
Aim: Reveal the evolutionary processes that contributed to biotic diversification in the Cerrado savanna using amphibians as a model. Evolutionary patterns were investigated by comparing the phylogeographic and biogeographic history of biome-specific yet widely distributed amphibian species …
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Phylogenetics and Phylogeography of Moray Eels (Muraenidae)
… Indo-Pacific. Finally, this dissertation uses comparative phylogeography to examine the effects of niche breadth on population genetic structure. The effects of niche breadth on range size, rarity, and extinction risk have been well explored. However, the ability of niche breadth to affect …
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Evolutionary Assembly of the Neotropical Montane Avifauna
… forest birds. In the second chapter, I conducted comparative analyses using species-specific ecological traits, and 3,175 mtDNA sequences collected across the range of 45 co-distributed birds. First, I found that niche breadth, dispersal ability, and clade age influence lineage diversity …
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Comparative Population Genomics and Speciation of Snakes Across the North American Deserts
… with different ecologies. Here I examine the comparative phylogeographic histories and population genomics of thirteen snake taxa that are widely distributed and co-occur across the arid southwest of North America. I first quantify the degree to which these species groups have a shared history …