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 150 for “"Refugia"”.
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Exploring the climate change refugia potential of equatorial Pacific coral reefs
Global climate models project a 21st century strengthening of the Pacific Equatorial Undercurrent (EUC). The consequent increase in topographic upwelling of cool waters onto equatorial coral reef islands would mitigate warming locally and modulate the intensity of coral bleaching. However, EUC …
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The overwintering ecology of a cold-adapted and refugia-dependent rattlesnake
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Exploring the climate change refugia potential of equatorial Pacific coral reefs
Global climate models project a 21st century strengthening of the Pacific Equatorial Undercurrent (EUC). The consequent increase in topographic upwelling of cool waters onto equatorial coral reef islands would mitigate warming locally and modulate the intensity of coral bleaching. However, EUC …
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Biogeographical detection of Holocene climate refugia in Italian Ecoregions: an applied proposal
L'abstract è presente nell'allegato / the abstract is in the attachment
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The importance of hydrologic refugia for the diversity of the Cape Flora
Refugia are sites with more stable climate and hydrology than the surrounding area. There is growing recognition of the need to conserve refugia due to their role in harboring rare and endemic plants that might otherwise be prone to extinction due to global change. These sites are considered …
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Geographic patterns of speciation in West and Central Africa: The role of rivers, mountains, and refugia
… with the formation of rivers, Pleistocene refugia, or a combination of the two. However, application of these hypotheses to the African rainforest was limited. In this study, I use phylogenomic and population genomic methods, combined with ecological niche model projections to the LGM and …
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The role of farm dams as refugia for aquatic invertebrates in a salinised landscape, south Western Australia
… at this wetland. Farm dams act as aquatic refugia if they convey resistance and/or resilience to the biotic communities of a disturbed habitat. This study proposed to investigate farm dams as potential refuge habitats from which aquatic macroinvertebrate species could recolonise Lake …
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Design and Field-test of Solar-passive Thermal Refugia for Overwintering Mozambique Tilapia (Oreochromis mossambicus) in Central Texas
… to allow for partial submersion. Walls of three refugia were lined with foam board (Foamular?) to provide additional resistance to heat-flux; whereas, the other three refugia were without foam board. One refuge was installed in each of six similar-sized ponds on the Triple JJJ Ranch of …
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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
… flows, and demographies of species. The glacial refugia hypothesis predicts that AST retracted into fragmented refugia during glacial cycles. The evolutionarily discrete drainage basin (EDDB) hypothesis suggests that the prevailing topography played an important population-structuring role. I …
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Comparative Phylogenetic Analysis in Populations of the Western Cottonmouth (Agkistrodon Piscivorus Leucostoma) Distributed in Three North American Drainage Basins
… 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 biogeographic assemblage of populations in different drainage basins. Here I use …
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The winds of change: A study of post-glacial dispersal in pacific-northwest conifers
… the present interglacial period. Such ""climate refugia"" allow pockets of diversity to persist within a regional climate that is otherwise inhospitable for those species. It is important to understand climate refugia, as they are potential targets for conservation. Equally important, assessing …
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Post-fire vegetation and bird habitat use in piñon-juniper woodlands
… seed dispersers were compared across burned, refugia, and unburned patches. Replicate patches of each habitat type were selected within three fire locations, and 3-4 bird point count stations and 1 forest inventory plot were established in each patch. No tree regeneration was observed 1-year …
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Genetic and Morphological Analyses of White Spruce in North America
… ice-free areas of Beringia served as northern refugia for arctic and boreal biota during the last Quaternary glaciation using cpDNA markers, (2) provided evidence for multiple refugia in Alaska and uncovered the roles of gene flow and drift in structuring the patterns we see today and (3) …
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Phylogeographic and morphometric studies on the Eurasian pygmy shrew Sorex minutus: insights into its evolutionary history and postglacial colonisation in Europe
… consistent with occurrence of southern glacial refugia, and there were two distinct lineages in Northern-Central Europe and near the Pyrenees supporting the existence of northern glacial refugia through the characteristics of their distribution and population expansion. Haplotypes from Britain …
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Phylogeography of eastern leatherwood (Dirca palustris L.) resolved by chloroplast sequencing and microsatellite genotyping
… North America persisted in southern glacial refugia near the Gulf Coast, after which many dispersed nearly 2000 km to contemporary northern range limits. The rates of migration necessary to account for present distributions exceed those suggested by contemporary observations of seed …
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Birds, molecules, and evolutionary patterns among Africa's islands in the sky
… 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 bird communities. Thus, a refugia type …
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The demography of Red Sea reef fishes since the Last Glacial Maximum
… the importance of coral reef habitat and refugia. Studying the impact of the LGM on Dascyllus marginatus, a species with a restricted range in the Indian Ocean, enabled me to use this study design to determine that the refugia was unlikely to have been outside the Red Sea, but rather …
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The Population Genetics Of The Wood Frog, Rana Sylvatica, Across Its Geographic Range
… as was the possible locations of glacial refugia for this species. DNA microsatellites were used as the genetic marker. This study found significant genetic differentiation across the geographic range of Rana sylvatica that increased with geographic distance. In addition three likely …
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Comparative Phylogeography of Central African Duikers Using Non-invasive Sampling Methods
… 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 Peter’s duiker …
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