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 196 for “"the Holocene"”.
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Studies in the holocene vegetation history of Wensleydale
… three blanket bog sites and one valley bog in the Wensleydale area of the Yorkshire Dales. Local pollen assemblage zones have been defined for each site using numerical methods, and these have been correlated to give regional pollen assemblage zones. A computer program has been developed to …
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Human-environmental relations on Bodmin Moor during the Holocene
This thesis describes palaeoenvironmental investigations on Bodmin Moor aimed at determining the timing, nature and extent of human induced environmental change on the moor. Pollen, charcoal and loss-on-ignition investigations were carried out at two main areas with chronological control provided …
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Biogenic Tracers Through the Holocene on the Alaskan Shelf
<p>Dramatic environmental changes in the Arctic Ocean have been observed for the last two decades including changing the amount of sea ice thickness and extent, and increased river discharge. In order to put these and other current day observations into historical context and perhaps reveal …
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Setting the Holocene clock using varved lake sediments in Sweden
The aim of this thesis was to study annually laminated (varved) Holocene lake sediment in Sweden, their formation and their potential as chronological and palaeoecological archives. Five lakes with continuous Holocene varved lake sediment sequences in northern (Västerbotten) and west central Sweden …
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Modelling the Holocene evolution of coastal gullies on the Isle of Wight
… environmental conditions, but in recent years the emergence of landscape evolution models (LEMs) has opened the possibility of using numerical modelling as a tool in palaeo-environmental reconstruction. The application of LEMs for this purpose involves retrodictive modelling, each simulation …
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Subarctic ecosystem responses to climate, catchment and permafrost dynamics in the Holocene
This thesis assesses aspects of the wetland development, permafrost dynamics and associated changes in carbon and nutrient cycling of the Stordalen Mire in northern Sweden. Various ecological and biogeochemical analyses of one peat and two lake sediment sequences were conducted, including analyses …
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High-Resolution Record of Vegetation and Climate Change During the Holocene in Southwestern Québec
A varved sediment sequence spanning the past ~11.0 ka was collected from Lac Noir (45.77N, 75.13W, 168 m a.s.l.) in southwestern Québec. A high-resolution pollen record documents the post-glacial vegetation history of the region over the course of the Holocene. The record shows an initial open …
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The exploitation of fish during the Holocene in the South-Western Cape, South Africa
This thesis describes the fish remains recovered from a number of sites in three different localities in South Africa; Elands Bay and Langebaan Lagoon on the west coast, and False Bay on the Cape Peninsula. Chapter One is an introductory account of ichthyology, its usefulness in archaeological …
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The holocene ostracods of the Agulhas Bank, South Africa : their classification, distribution and ecology
An analysis of the Holocene ostracod fauna of the Agulhas Bank has been carried out on seventy-three surficial sediment samples. Sixty-six species of Ostracoda have been recorded, of which fifty-nine species are accounted for in forty genera and the remaining seven species are of indeterminate …
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GEOARCHAEOLOGICAL AND PALAEOENVIRONMENTAL RECONSTRUCTION OF THE HOLOCENE CLIMATE-ENVIRONMENTAL-HUMAN NEXUS IN THEKURDISTAN REGION OF IRAQ
The geoarchaeological, multiscale approach performed in this research provides several new perspectives for the Holocene paleoclimatic and paleoenvironment reconstruction in the KRI Moreover, it enhances our understanding of the human responses and adaptation to climate, landscape, ecosystem, and …
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Changes in monsoonal precipitation and atmospheric circulation during the Holocene reconstructed from stalagmites from Northeastern India
… advent of stalagmites as palaeoclimate archives. The multitude of geochemical and physical proxies and a promise of a precise and accurate age model greatly appeal to palaeoclimatologists. Although substantial progress was made in speleothem-based palaeoclimate research and despite high-resolution …
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Hydroclimate variability in Central America during the Holocene inferred from lacustrine sediments in Lake Izabal, eastern Guatemala
"Holocene hydroclimate reconstructions have contributed to our understanding of the mechanisms controlling precipitation in Central America. Recent hydroclimate proxy records from the region, however, have revealed considerable spatiotemporal complexity in precipitation variability. This complexity …
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Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
The Indian monsoon affects the livelihood of over one billion people. Despite the importance of climate to society, knowledge of long-term monsoon variability is limited. This thesis provides Holocene records of monsoon variability, using sediment cores from river-dominated margins of the Bay of …
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THE IMPACTS OF CLIMATE AND THE ENVIRONMENT ON HUMAN SKELETAL MORPHOLOGY DURING THE HOLOCENE IN NORTH CHINA A
This dissertation investigates the temporal and regional variation in human skeletal morphology in relation to climate and the environment in Holocene China. Linking skeletal morphology to the changes in climate, subsistence strategy and socio-political development has been well-documented in …
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Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
The Indian monsoon affects the livelihood of over one billion people. Despite the importance of climate to society, knowledge of long-term monsoon variability is limited. This thesis provides Holocene records of monsoon variability, using sediment cores from river-dominated margins of the Bay of …
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Ecological resilience at semi-arid and temperate boundaries of the Mediterranean-type Fynbos Biome, South Africa, during the Holocene
Mediterranean-type ecosystems are amongst the most vulnerable to global change. Threats from desertification are projected due to rapid expansion of adjacent semiarid systems. Changes in fire frequency and intensity can alter ecosystem composition and structure, and potentially facilitate …
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