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 49 for “"microtopography"”.
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Studies of deep-sea sedimentary microtopography in the North Atlantic Ocean
Many of the small-scale topographic features (dimensions of centimeters to kilometers) found on the Blake-Bahama Outer Ridge (western North Atiantic, water depth greater than 4000 m) and in the Rockall Trough (northeastern North Atlantic, water depth greater than 2000 m) have been formed as bed …
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The Effects of Tree-Tip Microtopography on Soil Genesis, Northern Michigan
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987.
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Studies of deep-sea sedimentary microtopography in the North Atlantic Ocean.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Science.
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Analysis of microtopography, vegetation, and active-layer thickness using terrestrial LIDAR and kite photography, Barrow, AK
… fine scale to capture subtle changes related to microtopography and landcover. In 2010, terrestrial LIDAR was used to collect high-resolution elevation data for four 10 m × 10 m plots where maximum active-layer thickness (ALT) and elevation have been monitored on an annual basis since the …
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Analysis of microtopography, vegetation, and active-layer thickness using terrestrial LIDAR and kite photography, Barrow, AK
… fine scale to capture subtle changes related to microtopography and landcover. In 2010, terrestrial LIDAR was used to collect high-resolution elevation data for four 10 m × 10 m plots where maximum active-layer thickness (ALT) and elevation have been monitored on an annual basis since the …
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Soil Genesis and Vegetation Response to Amendments and Microtopography in Two Virginia Coastal Plain Created Wetlands
… We tested OM treatments, topsoil amendment, and microtopography effects on soil and vegetation properties at WWE and OM treatments at CCW. Pedogenic changes in soil morphology, physical and chemical properties were detected by comparing data to previous studies at these sites. At both sites, …
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The role of microtopography in the assessment of ecological condition on lowland raised bogs of conservation importance
… between the hydrology, ecology and vegetative microtopography of lowland raised mires, using data collected from two sites in Cumbria: Bolton Fell Moss and Walton Moss. The sites were chosen for study as they provided a contrast between the almost pristine condition of Walton Moss and the …
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Influences of Soil Amendments and Microtopography on Vegetation at a Created Tidal Freshwater Swamp in Southeastern Virginia
… (2x) compost, (TS) topsoil, and 1x+TS) and microtopography (level, pit and mound) on three parameters (plant species composition, above-ground characteristics of Taxodium distichum, and plant root characteristics) of vegetation growing at a created tidal freshwater swamp in Virginia. None of …
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Effect of Implant Surface Microtopography by Hydroxyapatite Grit-Blasting on Adhesion, Proliferation and Differentiation of Osteoblast-like Cell Line, MG-63
Objective: The purpose of this study is to evaluate the potential of the in vitro osteogenesis of microtopographically modified surfaces, RBM (resorbable blasting media) surfaces that generate a hydroxyapatite grit-blasting. Methods: First, to produce microtopographically modified surfaces, we made …
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Relationships between flood frequency and riparian plant community structure in mountain streams of western Montana
… four environmental variables (flood frequency, microtopography, light availability, and soil texture) and spatial heterogeneity on riparian plant community structure in seven study areas along mountain streams in western Montana, USA. Multivariate and spatial statistics were used to determine …
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Relationships between flood frequency and riparian plant community structure in mountain streams of western Montana
… four environmental variables (flood frequency, microtopography, light availability, and soil texture) and spatial heterogeneity on riparian plant community structure in seven study areas along mountain streams in western Montana, USA. Multivariate and spatial statistics were used to determine …
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Ecohydrology and self-organization of black ash wetlands
… creation, is paramount to forest recovery. Microtopography in these ecosystems provides crucial relief from anaerobic stress generated by higher water tables, allowing woody species to persist on elevated microsites (e.g., 30 cm above base soil elevation). Moreover, I show that …
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Caracterización hidrodinámica de praderas naturales de macrófitos bentónicos en fondos someros afectados por mareas
… of some benthic landscape elements (i.e. microtopography, benthic transitions and patches fragmentation) were analysed with a combination of in situ measurements (e.g. acoustic Doppler velocimeter (ADV) and dye tracer measurements) and flume tank experiments. Main results revealed that (1) …
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Vegetation and Soil Patterns at a Mountain Wetland Ecotone
… and the potential relationships among the trees, microtopography, and soil conditions, I collected and analyzed data on each of these factors within nine belt transects located across the ecotone. I gathered tree data on the following: location within transect, species, diameter at breast height …
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On the ecology of Acer circinatum Pursh: a study of factors that affect the distribution of a small hardwood tree within oldgrowth forests in southwestern British Columbia, Canada
… ground water levels, aspects of the microtopography and of vine maple persistence, priority effects and layering on the distribution pattern of vine maple within oldgrowth stands was investigated in this study. The distribution pattern was primarily influenced by surficial geology. …
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Quantifying the Impact of Seismic Lines on Methane Release in a Treed Bog Ecosystem using Unmanned Aerial Vehicles (UAVs)
… impacts on both physical parameters (microtopography and depth-to-water) and peatland methane emission, ultimately revealing one of the hidden impacts of seismic lines on Canada’s Boreal peatlands.
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The Influence of Multiple Scales of Environmental Context on the Distribution and Interaction of an Invasive Seagrass and its Native Congener
… in a patch mosaic associated with intertidal microtopography. I examine the role of multiple scales of environmental context in the vertical zonation of <italic>Z. japonica</italic> and <italic>Z. marina</italic>, and the relationship of meter to decameter scale microtopography to the local …
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The nature and significance of microtopographic effects on vegetation succession on selected glacier forelands, Jotunheimen and Jostedalen, Norway.
… study investigates the relationship between microtopography, prevailing micro-environmental factors and vegetation, with particular reference to succession, on six glacier forelands at successively higher altitudes. The study is successful in answering the three main aims of the thesis: by …
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Between Swamp and Sea: Agroforestry as Wetland Restoration in Southeast Virginia
… geomorphology, this work proposes a phased microtopography-driven approach to enact long-term transformation where silviculture is the strategy to make the transition operational. Through speculative design, this thesis reframes salt-impacted agricultural landscapes not as zones of loss, but …
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