Global ETD Search
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Showing 1 to 7 of 7 for “"Pleistocene refugia"”.
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Birds, molecules, and evolutionary patterns among Africa's islands in the sky
… most speciation events happened well before the Pleistocene and therefore the Pleistocene Refugia Hypothesis is not appropriate as a model with which to explain patterns of montane bird diversification in Africa. Rather, both dispersal and vicariance have played important roles in shaping montane …
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Comparative Phylogenetic Analysis in Populations of the Western Cottonmouth (Agkistrodon Piscivorus Leucostoma) Distributed in Three North American Drainage Basins
… cottonmouth remains unexplored. During the Pleistocene ice-ages populations of cottonmouths were confined to southern refugia in both Texas and Florida (Van Devender and Conant 2000). It is thought that post glacial dispersal patterns using stream corridors have resulted in the present …
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Geographic patterns of speciation in West and Central Africa: The role of rivers, mountains, and refugia
… events such as the Miocene aridification and the Pleistocene glaciation cycles. However, the roles of these factors in driving diversification in Central Africa are generally poorly understood. A major sampling gap exists for many taxa in the Congo Basin, and pollen core and fossil data tend to be …
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Comparative Phylogeography of Central African Duikers Using Non-invasive Sampling Methods
… of diversification in the tropics: the Pleistocene refugia and the riverine barrier hypotheses. Analyses of historical and contemporary population genetic structure were carried out on the three most abundant species in our sampling area: the bay duiker (<em>C. dorsalis</em>), the …
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Aspects of the biology of Mya arenaria and Ensis spp. (Mollusca; Bivalvia) in the Irish Sea and adjacent areas
… colonization but also possible southern European Pleistocene refugia. Specimens of Ensis spp. were obtained from five coastal areas around Ireland and Wales and species-specific PCR primers were used to amplify the internal transcribed spacer region 1 (ITS1) and the mitochondrial DNA CO1 gene and …
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A Phylogeographic Study of Arenaria ciliata and Arenaria norvegica in Ireland and Europe
… phylogeographic patterns indicative of Pleistocene glacial survival in situ, with evi- dence for cryptic refugia in Ireland, Rum and Svalbard, and multiple colonization events for A. ciliata. In contrast, the phylogeographic patterns obtained for A. norvegica are, for the most part, …
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Environmental granularity, rivers and climate history as shaping factors for species' distribution and diversity patterns
… of time; (5) general support for the existence refugia during the Last Glacial Maximum; and (6) each of the analyzed factors have different effects on the patterns of biodiversity. The study of the factors included in this work helped the understanding of their particular role in shaping …