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 35 for “"fire intensity"”.
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Spatial distribution of charcoal after a prescribed fire on Middle Mountain, VA
… distribution of surface charcoal after a managed fire and its relationship to fire intensity and site characteristics. Such studies are lacking for the southern Appalachian Mountains. In April 2010, The Nature Conservancy conducted a ~150ha prescribed burn in pine- and oak-dominated forests on the …
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Fire Ecology of Northern Andean grasslands: Estimating recent fire history and its impact on páramo plants
… and sustainable management is a high priority. Fires are the most significant human impact in the páramo, yet fire regimes and the response of plant communities to fire are not well understood (Luteyn, 1992; Laegaard 1992; Ramsay and Oxley, 1996; Ramsay, 2001; Horn & Kappelle, 2009). A …
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Fire and Road Disturbance Impacts on Forest Plant Species and Seed Rain in Table Mountain Fire Arai, Kittitas County, Washington
… some species while negatively impacting others. Fire has been a natural, reoccurring source of disturbance in Pacific Northwest forests. Over the past centuries the fire paradigm has changed in favor of fire suppression. Forest roads permit access provide greater access but further fracture …
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Fire and non-native grass invasion across a heterogeneous landscape in the Central Hardwoods
… the potential to change natural and prescribed fire regimes by altering fuels, which in turn may promote further invasion. I examined if invasion by Microstegium vimineum, a non-native annual grass resulted in a positive invasion-fire feedback in eastern deciduous forests managed with prescribed …
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Influence of Woody Vegetation Composition and Structure on Fuels and Prescribed Fire in Mountain Longleaf Restoration
… widespread ecological state shift largely due to fire exclusion which has allowed mesophytes, i.e., shade-tolerant, often fire-sensitive species to encroach, reducing flammability and biodiversity through a process known as “mesophication.” Although prescribed fire is commonly used to reverse …
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Investigation of Surface Instability Processes in Burned Areas through Remote Sensing and Field Surveys
Wildfires strongly impact rocky, forested landscapes, driving erosion, debris production, and changes in sediment connectivity. This study combines field surveys, remote sensing, and experimental analyses in the 2021 Montiferru-Planargia Fire and 2022 Los Guajares Fire burnt areas to investigate …
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Structural Assessment of Glued-Laminated Timber Columns Subjected to Real Fires
This thesis investigates the performance and post-fire structural integrity of glued-laminated (glulam) columns when exposed to real fires. The primary objective of the Mass Timber Demonstration Fire Test Program (MTDFTP) in Ottawa was to conduct large-scale fire tests to explore construction fire …
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Charcoal chemistry : developing a proxy for paleofire regimes.
Wildfires have occurred over geologic time since the evolution of land plants and affect global biogeochemical cycling and ecosystem processes. Charcoal particles in the geological record may contain information on several aspects of paleowildfire regimes. The fire intensity, the energy produced …
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Potential key drivers of thicket expansion in savanna
… Data on height growth, root suckering and fire damage were collected for two thicket forming species. A simulation model was developed to evaluate the effect of different biotic and abiotic factors on the spread of a thickerclump in savanna in the Hluhluwe Game Reserve, South Africa. The …
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Quantifying the immediate carbon emissions from El Niño-mediated wildfires in humid tropical forests
Wildfires produce substantial CO2 emissions in the humid tropics during El Niñomediated extreme droughts, and these emissions are expected to increase in coming decades. Immediate carbon emissions from uncontrolled wildfires in human-modified tropical forests can be considerable owing to high …
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Predicting the post-fire responses of two forest tree precursors after an autumn fire in mountain fynbos
This study investigated whether post-fire survival of two fynbos forest precursors Rapanea melanophloeos (L). Mez and Kiggelaria afri.cana L. were dependent on plant size or fire intensity. Two possible mechanisms of size dependent survival were investigated; 1) is fire survival the (ability to …
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Prescribed burning for vegetation management on the Blue Ridge Parkway
Fire is a cultural phenomenon. It is among man's oldest tools, the first product of the natural world he learned to domesticate. Since the 1970's, fire has been utilized extensively in forest management practices. This study was designed to compare prescribed burning in the fall or the spring with …
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Classification of Plot-Level Fire-Caused Tree Mortality in a Redwood Forest Using Digital Orthophotography and Lidar
… (Cal Poly). On August 12, 2009, the Lockheed Fire burned 300 ha of forestland, 51% of the forested area on the property, with variable fire intensity and mortality. This study used existing inventory data from 47 permanent 0.08 ha (1/5 ac) plots to compare the accuracy of classifying mortality …
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The Response of High Elevation Wetlands to Past Climate Change, and Implications for the Future
… Pond begin 8,804 cal yr BP and reveals that fire intensity and frequency was much greater in the early Holocene than present. Warmer and drier conditions than present during the Holocene Climatic Optimum decreased fire frequency likely due to a decrease in available fuel. Autochthonous …
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Effects of repeated fire on the savanna / forest boundary
… stable states, among others, determined by fire ecology feedbacks. Bush encroachment has become an ever-increasing trend converting grassland and savanna biomes to forest/thicket. A severe firestorm occurred in the Hluhluwe-Umfolozi Game Reserve in north-eastern South Africa in September …
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Deadwood Dynamics: A Case Study at Prince William Forest Park, Virginia
… amount and structure may influence potential wildfire hazard by altering combustible DWM mass and creating fuel structures that increase fire intensity and spread. Deadwood is also critical to carbon storage and nutrient cycling and may vary based upon the size classes of individual deadwood …
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Effects of wildfire on the structure and composition of mixed oak forests in the Blue Ridge of Virginia
… a 1900 ha man-caused early growing season wildfire in Shenandoah National Park. in the Blue Ridge Physiographic Province. Virginia. Pre-fire stands were dominated by chestnut. scarlet, and northern red oaks growing on medium quality sites (50 year upland oak site index 16-20 m). Permanent …
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Within-fire patchiness associated with prescribed burning in the northern Jarrah forests of Western Australia
… perimeter. This may be evident as reduced post-fire vegetation patchiness. Western Australian Jarrah (Eucalyptus marginata) forests are managed to reduce fuel loads to protect life and property. Additionally, specific biodiversity and fuel reduction programs are completed by means of low …
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Risk Assessment of Post-Fire Floods on Dams and Their Floodplains
… Decision makers need to understand the intensity of potential natural disasters to take necessary actions to minimize their impacts. In Southwest United States, wildfires are increasing in frequency and magnitude. The literature review shows limited studies in evaluating the impacts of …
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Insect Conservation Within the Severely Fragmented Eastern Tallgrass Prairie Landscape
… used in a third study to examine the role of fire as a determinant of insect species richness and abundance within isolated prairie remnants. Remnant-dependence among 17 taxa was found to range from lows of 0% for grouse locusts, carrion beetles, and treehoppers, to highs of 75% and 83% for …
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