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 13 of 13 for “"Beringia"”.
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Thermokarst dynamics in central-eastern Beringia
… and thermokarst dynamics in central-eastern Beringia, the terrestrial land mass connecting Eurasia and North America during glacial sea-level low stands. In order to investigate development, processes and influence of thermokarst dynamics, several sediment cores from extant lakes and drained …
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Arthropod successionin Whitehorse, Yukon Territory and compared development of protophormia terraenovae (R. -D.) from Beringia and the Great Lakes Region
Forensic medicocriminal entomology is used in the estimation of post-mortem intervals in death investigations, by means of arthropod succession patterns and the development rates of individual insect species. The purpose of this research was to determine arthropod succession patterns in Whitehorse, …
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The Reconstruction of Climate in Beringia by analysis of Glycerol Dialkyl Glycerol Tetraether (GDGT) Distributions using High Performance Liquid Chromatography – Mass Spectrometry (HPLC-MS).
The reconstruction of past environments, including temperatures, aids in the production of climate models which predict how the Earth will respond to future climatic changes that are occurring at an accelerated rate, due to global warming. High-latitude seas, including the Bering Sea, are sensitive …
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COMPARATIVE BIOGEOGRAPHY OF NORTH AMERICAN PIKA PARASITES: UNRAVELING A HISTORY DRIVEN BY CLIMATE CHANGE
… (Eugenuris)</em>. Colonization history across Beringia was assessed using analyses of historical range estimation and tests for simultaneous divergence. Analysis results allow me reject the hypothesis that these parasites colonized the Nearctic during a single glacial cycle, as evidenced by …
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Prehistoric Colonization of Southcentral Alaska: Human Adaptations in a Post Glacial World
… aspects of the settling phase in eastern Beringia not only for its potential to inform about the human response to post-glacial landscapes but also for what we can learn about subsequent migrations to the southern coast of Alaska.Understanding how early foraging societies spread throughout …
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Molecular Phylogenetic and Biogeographic Study of the Genus Artemisia (Asteraceae), With an Emphasis on Section Absinthium
… widespread species and species from the Arctic, Beringia, and islands and archipelagos in the North Pacific. The molecular ITS phylogeny contained 194 accessions of 173 taxa (91 sequences of 73 taxa were new and the remaining from GenBank) and showed that Artemisia and its traditional …
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Genetic and Morphological Analyses of White Spruce in North America
… long standing hypothesis that 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 …
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Late quaternary Alaskan paleoclimate : geoarchaeological insights into the Pleistocene-Holocene transition.
Eastern Beringia is a region which has undergone dramatic changes since the end of the Last Glacial Maximum, environmentally and climatically. These changing conditions likely contributed to the changes in human behavior observed in the earliest human inhabitants who migrated into the region …
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BERINGIAN BIOGEOGRAPHY: PATTERNS OF INTERCONTINENTAL DISPERSAL AND THE STRUCTURING OF A HOLARCTIC TAPEWORM GENUS
… have worked toward elucidating the role of Beringia in assembling northern faunas, relatively little work has focused on parasites. Here I examine the number and direction of transberingian colonization events within the Holarctic tapeworm genus, <em>Arostrilepis </em>Mas-Coma & Tenora, …
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Systematics Within the Therevinae (Insecta: Diptera: Therevidae)
… dispersal events through the Americas and across Beringia to Asia as well as another major lineage dispersing northward through Africa until it contacted the Arabian Peninsula. A new genus, Ambradolon, is diagnosed from Dominican amber. A new genus, Insulatitan, represented by four new species: I. …
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Introgression, Population Structure, and Systematics of the Sphagnum capillifolium complex
… plants in the Pacific Northwest, or around the Beringian and Arctic regions. Our results suggest that populations of circumboreal species survived in multiple refugia during the last glacial maximum (LGM). Long-distance dispersal out of refugia, population bottlenecks, and possible adaptations …
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Paleogenomics in the Americas: demography, adaptations, and resilience
… due to the Northwest Coast’s proximity to Beringia and its prime location with respect to the coastal migration model, which holds that the first migration wave into the Americas occurred along the Pacific coast. Recent research, utilizing genome-wide data of both ancient and modern native …