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 37 for “"Sand Dune"”.
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Sand dune interactions
Sand dunes are coherent sedimentary structures shaped by the shear stress exerted by the overlaying fluid. Natural dunes abundantly populate deserts, river bottoms, sea beds, and even snow fields. They rarely occur in isolation, but usually form extensive dune fields, which continuously evolve due …
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Remediation of Sand Dune Blowouts Along Pipeline Right of Ways.
Blowouts in sand dunes along pipeline right of ways are a problem facing many pipeline maintenance companies, environmentalists, and public land managers. Blowouts form in sandy soils when the ground surface is not protected from seasonal winds. The ground surface becomes unprotected when there is …
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Water and energy balance in the Namib sand-dune lizard, Angolosaurus skoogi
… (FMR) and water flux of the herbivorous Namib sand-dune lizard, Angolosaurus skoogi, was measured during the summer non-breeding period (early January) by means of doubly labelled water. FMR was about half that expected for a lizard of this size. Water flux and laboratory measured standard …
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Life History Variation In Artemisia Campestris On A Lake Huron Sand Dune System
… of Artemisia campestris growing on the sand dunes at Pinery Provincial Park, Ontario. Populations in three habitats differing in seral age, vegetation cover, vegetation type and proximity to the lake were selected for study. The distribution of phenotypes within and among populations, …
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A HYDROLOGICAL INVESTIGATION OF THREE DEVON SAND DUNE SYSTEMS; BRAUNTON BURROWS, NORTHAM BURROWS AND DAWLISH WARREN
… by English Nature that Devon's three largest sand dune systems Braunton Burrows, Northam Burrows and Dawlish Warren were drying out to the detriment of the dune habitat flora and fauna. Research was therefore required to understand how these systems functioned hydrologically, to determine …
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Morphological and Physiological Leaf Adaptations to Seasonal and Diurnal Abiotic Stress for Two Barrier Island Sand Dune Species
… and their fauna and flora at great risk. The sand dune ridge and swale system present on many barrier islands function as a buffer during coastal storm events, and native sand dune vegetation play a critical role in the formation and maintenance of these systems. The creation and maintenance …
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SAND DUNE ENVIRONMENTS IN FIRST NATIONS LIFEWAYS: HOLISTIC INTERPRETATION FOR THE MIDDLE AND LATE PRECONTACT PERIODS ON THE NORTHERN PLAINS
… and Late Precontact archaeological sites in sand dune areas across the Northern Plains. Varying from isolated finds to complex multi-component sites, they represent a set of complex and integrated behaviours that to date have not been examined in a holistic manner across both time and space. …
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Assessing the uncertainties of Radar and LiDAR derived digital elevation information over static and dynamic terrain
… over built and vegetated environments. Sand dune migration is studied using satellite laser altimetry. By using the phase of the elevation profiles and applying a cross-correlation between overlapping profiles, we estimate migration vectors resulting in a database that can be correlated …
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Sand dune movement and its impact on human activities in the North Western coast region of Libya. An analysis of the sediment characteristics of sand dunes, and their movement using satellite images, and the effects of encroachment on farms assessed by a questionnaire survey.
Sand movement is one of the many environmental problems facing humans in the dry and semi-dry areas of the world. This study has investigated the observed changes in sand dune coverage compared to predictions, and has also assessed the impact of sand movement on human activity in the north western …
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Sand dune movement and its impact on human activities in the North Western coast region of Libya. An analysis of the sediment characteristics of sand dunes, and their movement using satellite images, and the effects of encroachment on farms assessed by a questionnaire survey.
Sand movement is one of the many environmental problems facing humans in the dry and semi-dry areas of the world. This study has investigated the observed changes in sand dune coverage compared to predictions, and has also assessed the impact of sand movement on human activity in the north western …
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ECOLOGY AND COEXISTENCE OF SCAPHIRHYNCHUS STURGEON AT MULTIPLE SCALES
… substrate and velocity). For example, alluvial sand dunes are thought to provide energetic relief for benthic fishes in energetically costly riverine landscapes. However, use of alluvial dune habitat is not well understood, and it is unclear whether dunes provide refuge that effectively reduces …
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Effects of Soil Fungi on Tree Seedling Establishment in a Southeastern Coastal Plain Forest
… other studies conducted in different systems (sand dune, grassland, and old field), the effects of soil fungi were minor in a closed canopy forest. Only Q. alba showed a significant response to the fungicide (p < 0.05) treatment with increased growth. Overstory composition had no significant …
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Morfologia externa da larva de Megadytes giganteus (Laporte, 1834) (Insecta: Coleoptera: Dytiscidae), com evidências sobre a condição monofilética da tribo Cybisterini
… studied based mainly on material collected in a sand dune swamp and temporary ponds located in Maricá, Rio de Janeiro States, Brazil (22°56'S, 42º50'W). The external morphology of the three instars larva is described. The larvae of third instar is illustrated. Many of the characters found in …
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Documenting the Earthquake History of the Thousand Springs Fault in Summer Lake Basin, Oregon, USA
… in the northwestern Basin and Range: The Thousand Springs (TSF), Ana River (ARF), Slide Mountain, and Winter Ridge faults. Other than the TSF, the faults in the Summer Lake basin have documented histories that include surface-rupturing (>M6) earthquakes. Scarps along the TSF were only recently …
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Modeling the Near-Surface Using High-Resolution Seismic Data
… data, I conclude that land-streamer data over sand dune can be more coherent than conventional data, especially the first-arrival events.
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Belowground Fungal Community Change Associated with Ecosystem Development
… a publication draft that describes a study of sand-dune soil samples from northern Michigan that were analyzed to pinpoint the structural change in the fungal community during the development of the ecosystem. The samples were analyzed by pyrosequencing the soil DNA, targeting the internal …
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