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 29 for “"burn severity"”.
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Landscape & meteorological drivers of burn severity in the southern Rockies
The increasing occurrence and severity of wildfires in the Southern Rockies Ecoregion over recent decades requires a comprehensive assessment of the drivers of burn severity. This study uses Random Forest models to analyze the relative importance of landscape and meteorological variables in …
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Drivers of burn severity in the northern Cascade Range, Washington, USA
… complexity on the occurrence, size, severity, and within-fire severity pattern of fires in the northern Cascade Range of Washington, USA. Landsat Thematic Mapper (LTM) data were used to quantify fire severity for all fires greater than 10 ha (n = 125) that occurred during a 25-year …
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The Effects of Wildfire Burn Severity on Bee and Wasp Communities Two Decades Post-Fire
… changes are affecting fire frequency, severity, and seasonality. Disturbances like wildfire affect bee and wasp communities, but recent meta-analyses are conflicted about whether fire harms or benefits insect pollinators. We investigated the lasting effects of wildfire burn severity on …
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Soil burn severity and climatic analysis of post-wildfire soil hydraulic properties from across the western continental United States
… like flash flooding and debris flows in recently burned areas. However, infiltration capacity is spatially and temporally variable, which makes its prediction challenging, particularly in burned environments. The extent of fire-prone areas in the western United States is growing, and locations …
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Causal factors and consequences of mixed-severity fire in Black Hills ponderosa pine forests
… fire of 2000 to address the theme of mixed- severity fire in Black Hills ponderosa pine forests. Mixed severity fire resulted in many patches of low, moderate, and high severity, distributed in roughly equal proportion across the burned landscape. There was a significant effect of stand …
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Post-Wildfire Vegetation Response on Diverse Rangelands in Northeast California: Does Livestock Grazing Management Matter?
… from grazing for two growing seasons following a burn; however, this guideline does not consider biophysical factors that influence vegetation recovery after fire. We examined responses of Bromus tectorum, annual graminoids, perennial graminoids, and species diversity to grazing management …
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The effects of grass invasion and fire severity on Acacia koa regeneration
… the relationships of pre-fire grass cover with burn severity and post-fire recovery of the native tree Acacia koa . I had three questions: 1) At what level of precision can pre-fire grass cover be accurately (≥60% accuracy) estimated from oblique aerial photos? 2) How are post-fire koa …
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Unraveling an uncertain future for the Great Basin: how climate, grass invasion, and wildfire interact to drive ecosystem function
… three investigated the role of aridity and burn severity on N retention after wildfire using a field and laboratory approach. I quantified how burn severity and aridity influence some of the key factors driving N uptake by plants and soil microbes after fire. Plant N uptake exhibited a …
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Megafires in the temperate conifer forests of the Sierra Nevada mountains of California from 1985 to 2020: remote sensing and field-based analysis of fire characteristics and vegetation recovery dynamics
Global burned area has seen a decrease over recent decades, but there are stark regional trends of increasing burned area, fire frequency and burn severity. As a result of fire suppression-mediated fuel accumulation and accelerating climatic changes, this trend of an intensifying fire regime is …
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Post-wildfire black carbon deposition on the snowpack in the Cascade Range, Washington State: Temporal and spatial variability with implications for accelerated melt
… on the snowpack. LAI such as black carbon (BC), burned woody debris, and dust reduce snow albedo (reflectance), accelerate melt, and affect the timing and availability of water resources. Charred trees in post-wildfire forests provide a significant source of BC that is deposited on the snowpack …
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Computational and Experimental Modeling of the Bioheat Transfer Process of Perfusion in Tissue Applied to Burn Wounds
… problems which is the ability of detecting burn severity. The method was tested with a phantom perfusion system. The results matched known blood perfusion and thermal resistance values. The method was also tested with burns on animal models. Inflammation effects associated with the burns …
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Post-fire carbon, fuels, and vegetation dynamics in wet temperate forests: implications for future fire and management in the Pacific Northwest
… the relative influence of pre-fire stand age and burn severity on two important post-fire disturbance legacies: carbon and fuel profiles. I found that pre-fire stand age drove total legacy amounts while burn severity modified legacy condition. Regardless of burn severity, most biomass present …
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The Effects of Fire on the Vernal Herbs of an Eastern Mesic Forest
… to and following one of three treatments: spring burn, winter burn, or negative control. I conducted low-intensity spring burns in April 2010 and winter burns in February 2011. I used chi square analyses to test for changes in species richness, abundance of rare species, abundance of common …
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Beaver moderated fire resistance in the North Cascades and potential for climate change adaptation
… for larger, more intense fires. Intense burns can alter watershed hydrology, increasing the potential for harmful channel incision, which impairs riparian ecosystem function by lowering the water table, disconnecting floodplains from aquatic environments. However, wetlands and functioning …
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Examining Drivers of Post-Wildfire Vegetation Dynamics Across Multiple Scales Using Time-Series Remote Sensing
… to local environmental factors such as burn severity, soil properties, vegetation, and topography. Residuals from modeled rates of post-fire regeneration were evaluated in the context of management activities and site characteristics using expert knowledge. Post-fire rates of …
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Stream water and soil water chemistry after the Table Mountain wildfire, Washington, USA
… Table Mountain wildfire. Sites with different burn severity were also compared. The fire occurred in 2012 in Kittitas County, north of Ellensburg, Washington. Samples were collected at severely burned, moderately burned, and unburned field sites from within and adjacent to the wildfire …
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Spatio-temporal patterns of forest disturbance in western North America: implications for forest resilience
… Finally, I quantified the range of variation in burn severity patch structure characterizing Northwest US fire regimes. Despite changes in climate and fire activity in recent decades, I found that the range of variation in high-severity burn patches, conditional on fire size, has remained …
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Evaluation of Red Alder Mortality in the Little Creek Watershed Following the 2009 Lockheed Fire
… California. The study area was divided into burn severity zones and every red alder within the riparian zone was observed and assessed for mortality. Height, diameter at breast height (DBH), and age were collected on selected trees. An estimation of red alder large woody debris (LWD) input to …
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Post-fire Response of Little Creek Watershed: Evaluation of Change in Sediment Production and Suspended Sediment Transport
… of ground cover, steep slopes, and high soil burn severity were the most influential factors contributing to hillslope erosion. Contrary to results reported in other western U.S. studies, regression analyses determined that the effect of fire significantly decreased suspended sediment …
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Evaluating Five Years of Soil Hydrologic Response Following the 2009 Lockheed Fire in the Coastal Santa Cruz Mountains of California
<p>The Lockheed Fire burned 31 km<sup>2</sup> (7,660 acres) of the Scotts Creek watershed in August 2009. 4.5 km<sup>2</sup> (1,100 acres) of California Polytechnic State University’s educational and research facility at Swanton Pacific Ranch. The burned region presented an opportunity for studying …
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