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 131 for “"Phylogeography"”.
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Systematics, Phylogeography and Ecology of Elaphomycetaceae
… is an investigation of the systematics, phylogeography, and ecology of a globally distributed fungal family, the Elaphomycetaceae. In Chapter 1, we assess the literature on fungal phylogeography, reviewing large-scale phylogenetics studies and performing a meta-data analysis of fungal …
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Phylogenetics and Phylogeography of Moray Eels (Muraenidae)
… 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 population …
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Aspects of infraspecific phylogeography of Calopteryx splendens
… these populations and lighted some aspects of phylogeography of the (sub)species. In morphological study, the question was how well populations (subspecies) are recognizable based on wing and wing spot sizes and wing shape (irrespective of wing spot). In both morphological methods, left fore …
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Reconciling Western toad phylogeography with Great Basin prehistory
This study marks the first attempt to study historical processes that may be responsible for the contemporary geographic distribution and phylogeny of Great Basin Western toads (Anaxyrus boreas spp.). The dynamic aquatic history of the Great Basin was evaluated as a potential model for early toad …
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Phylogeography of the Malagasy Ant Species Otontomachus coquereli
<p>Madagascar is an extremely diverse and geographically complex area boasting levels of endemism that blatantly raise questions about their origins. There is evidence that these endemics arose via insitu diversification during Madagascar's ~88 million year isolation, even though it was essentially …
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The Phylogeography of Prosopium in Western North America
The mountain whitefish (Prosopium williamsoni) has been largely overlooked in population genetic analyses despite its wide distribution in discrete drainage basins in western North America for over four million years. Its closest sister taxa the Bear Lake whitefish (P. abyssicola), Bonneville cisco …
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Phylogeny and phylogeography of four southern ocean petrels
This thesis investigates the phylogeography of four southern ocean petrel species in an attempt to resolve taxonomic uncertainties and phylogeography in these species. A large proportion of petrel and albatross species are listed as threatened under Red List criteria, in many cases as a result of …
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Phylogeography and Conservation of the Arroyo Toad (Bufo californicus)
<p>The Arroyo Toad <em>(Bufo cakfomicus)</em> is an endangered species found in rivers of southern California, USA and northern Baja California, Mexico. It has experienced population declines throughout its range, as a result of urbanization, hydrologic alterations, and overall habitat loss. As …
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Reconstructing South African Afromontane forest history with bryophyte phylogeography
Forests occur as fragmented patches throughout Africa, however the basis for the disjunction of afromontane forests remains uncertain. The genetic structure of organisms should reflect their hi story, and in turn the history of their environment. Thus a phylogeographical study of forest-faithful …
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Phylogeography of the Night Lizard, Xantusia henshawi, from Southern California
<p>The granite night lizard, <em>Xantusia henshawi</em>, is a highly specialized crevice dwelling lizard found in the Peninsular Ranges of southern California, United States and northern Baja California, Mexico. Generally, little morphological variation is seen in this species over a variety of …
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Ecophysiology, Morphology and Phylogeography of Insects in the Scotia Arc
… geographical history, through the use of phylogeography, and what kind of adaptations (morphological and physiological) they have developed to deal with the environmental conditions and changes, such as osmotic stress and desiccation tolerance. There was also an intrinsic objective to …
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Molecular systematics and phylogeography of the Helmeted Guineafowl (Numida meleagris)
Includes bibliographical references (leaves 61-67).
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Phylogeography of Darlingtonea Kentuckensis and Molecular Systematics of Kentucky Cave Trechines
… individuals from 27 populations, and patterns of phylogeography and population structure were inferred from COI haplotypes. A hierarchical analysis of molecular variance found low nucleotide diversity within populations and statistically significant variation among geographically-defined groups …
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Phylogeography of Marine Meiofaunal Nemerteans of the Ototyphlonemertes Fila Species Complex
Morphological conservatism combined with intraspecific variability has obstructed studies of speciation and species boundaries among marine meiofauna. Ototyphlonemertes is a genus of meiofaunal nemerteans inhabiting the interstitial spaces of marine sediments. Its members lack pelagic larvae and …
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The phylogeography of North American chestnuts and chinquapins (Castanea Mill., Fagaceae)
North American Castanea Mill. (Fagaceae) consists of three morphologically variable species: Castanea dentata, Castanea pumila and Castanea ozarkensis. Taxonomy of these species has been complicated by intermediate morphology, similarity in growth habit, and putative naturally occurring …
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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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