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 “"forest soil"”.
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Comparison of Techniques for Estimation of Forest Soil Carbon
Soil organic carbon represents the largest constituent of the global C pool and carbon budgets are studied by researchers and modelers in C cycling, global climate change, and soil quality studies. Pedon and soil interpretation record databases are used with soil and ecological maps to estimate …
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Recreating a functioning forest soil in reclaimed oil sands in northern Alberta
During oil-sands mining all vegetation cover, soil, overburden and oil-sand is removed, leaving pits several kilometres wide and hundreds of metres deep. These pits are reclaimed by a variety of treatments using mineral soil or a mixed peat and mineral soil as the capping layer and planted with …
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Effects of Disturbance History on Forest Soil Characteristics in the Southern Appalachian Mountains
Minimally disturbed virgin forest soils in the Little Santeetlah Creek (LSC) watershed of western North Carolina were sampled along with soils from the adjacent disturbed Slickrock Creek (SRC) watershed. Soils with similar elevation/landform/vegetation/parent material characteristics were initially …
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Measurement of Phytase Activity in a Clymer Forest Soil Using the TInsP5 Probe
Measurement of soil phytase activity (PA) and delineation of the impact of this important phosphomonoesterase on the P-cycling process in soil and sediments suffer from the lack of a reliable assay. A method for measuring PA in soil that promises to be accurate and reliable has been recently …
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Sulfate Dynamics and Base Cation Release in a High Elevation Appalachian Forest Soil
Two soils from the Fernow Experimental Forest near Parsons, West Virginia were characterized and evaluated in terms of their susceptibility to enhanced soil acidification via acidic atmospheric inputs. After initial physical, chemical, and mineralogical characterization, the soils were analyzed for …
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Patterns in forest soil microbial community composition across a range of regional climates in Western Canada
Soil microbial communities can be characterized by community structure and function (community composition) across a spectrum of spatial scales, and variation in soil microbial composition has been associated with a number of environmental gradients. This study investigates the structure and …
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Long-term Effects of Prescribed Fire and Fire Surrogate Treatments on Southern Appalachian Mountain Forest Soil Chemistry
As a response to rising wildfire hazard and forest structure and composition concerns, the National Fire and Fire Surrogate Study was established in 2000 to determine how fuel reduction and ecosystem restoration techniques might affect ecosystem properties and processes across the United States. …
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Forest soil and vegetation characteristics in two forest types following wildfire in the Shenandoah National Park, Virginia
… This study was established to measure post-fire forest soil and vegetation characteristics in both the mixed pine and mixed oak forest types occurring on Dovel Mountain in the Shenandoah National Park, Virginia. Vegetation and soil results represent one (1989) and two (1990) growing seasons …
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Occurrence and Characteristics of Nonfruiting Myxobacteria Isolated from Pine Forest Soils
… of nonfruiting myxobacteria isolated from pine forest soil Three years after a prescribed burn, the population of nonfruiting myxobacteria was decreased in the burn site. The organisms isolated were distinct from any of the known species of nonfruiting myxobacteria, and apparently are new …
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Analysis of Bacterial Abundance and Species Diversity in Various Soils
Different soil types display a wide range of nutrient content, microbial abundance and diversity. Many of the microbes viable in soil have practical functions in the agricultural and medical fields while others are pathogenic. Garden topsoil, potting soil, forest soil, compost and manure were the …
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Dynamics and underlying processes of N2O and NO soil-atmosphere exchange under extreme meteorological boundary conditions
… periods with subsequent heavy rainfall or soil frost and thaw events in mountain regions of Central Europe. These indirect effects of global warming may considerably influence soil microbial processes and in consequence emissions of climate-relevant trace gases. Regarding the nitrogen …
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Influence of Mycorrhizal Inoculation Treatments on Native Tree and Shrub Survival in a Floodplain, Flathead Indian Reservation
… Mycopak and Biogrow, were tested against forest soil, and a control treatment on biomass and survival of Populus tremuloides, Salix bebbiana, Populus trichocarpa, and Cornus stolonifera during the summer of 2003 and 2004. Because these seedlings are difficult to establish on cobbled …
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Influence of Mycorrhizal Inoculation Treatments on Native Tree and Shrub Survival in a Floodplain, Flathead Indian Reservation
… Mycopak and Biogrow, were tested against forest soil, and a control treatment on biomass and survival of Populus tremuloides, Salix bebbiana, Populus trichocarpa, and Cornus stolonifera during the summer of 2003 and 2004. Because these seedlings are difficult to establish on cobbled …
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Bird perches and soil amendments as revegetation techniques for landslides in Puerto Rico
… most severe natural disturbances in tropical rainforests. The loss of the topsoil layer is detrimental to plant establishment and plant succession as it contains the soil seed bank, as well as the majority of the nutrients essential for plant growth. In this study, I introduced bird perches to six …
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Biogeochemical niche construction in the forest-fynbos mosaic of Jonkershoek Nature Reserve, South Africa
… dominated by fynbos vegetation with patches of forest restricted to rock screes and stream banks owing to the more favourable moisture status of these microhabitats. A detailed analysis of soil underlying forest and fynbos vegetation in Jonkershoek Nature Reserve was investigated. A total of …
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Soil Carbon Dynamics in Lawns Converted From Appalachian Mixed Oak Stands
Conversion of native forests to turfgrass-dominated residential landscapes under a wide range of management practices results in dramatic changes to vegetation and soils, which may affect soil carbon storage. To better understand the effects of landscape conversion and management on soil carbon, we …
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Studies of genera cytophaga-flavobacterium in context of the soil carbon cycle
… cycle; with specific interest in the cycling of soil carbon. This need is two-fold and interconnected. The global climate change is in-part due to the loss of soil organic carbon and the reduced ability of soils to sequester carbon. Also, to maintain sustainable, high yielding agriculture, carbon …
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Hydric soil properties as influenced by land-use in Southeast Virginia wet flats
… the growing season used by regulators in hydric soil and wetland hydrology and the validity of ignoring land use in these definitions is questionable. This study compared measured air and soil temperature with various growing season dates and indicators, and determined the relationships between …
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