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 30 for “"Vegetation Response"”.
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Modeling white-tailed deer habitat quality and vegetation response to succession and management
… new models were developed that predict the response of habitat variables important to a variety of species to succession and management. Habitat quality predicted by the white-tailed deer HSI model for 11 different deer management units was not strongly correlated with body weight …
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Chemical Treatment of Monodominant Cattail Stands In Semipermanent Wetlands: Duck, Invertebrate, and Vegetation Response
… of cattail in semi-permanent wetlands and the response of breeding and overwater nesting ducks and aquatic invertebrates to the chemical treatments were studied in northeastern South Dakota. Four wetlands were treated with glyphosate in 1985 by fixed-wing aircraft and were compared to …
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Post-Wildfire Vegetation Response on Diverse Rangelands in Northeast California: Does Livestock Grazing Management Matter?
… 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 strategies (rested from livestock grazing one or two growing seasons after fire vs. …
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Quantifying Ungulate-Rangeland Interactions: From Monitoring Free-Roaming Horse Condition to Vegetation Response Following Herbivore Exclusion
Reliable assessment of herbivore condition and vegetation response is essential for understanding grazing impacts across arid rangelands. This thesis integrates two complementary studies that address these challenges at different scales. The first develops and validates a quantitative framework for …
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Forest vegetation response to the application of municipal sewage sludge in the coastal western hemlock zone
… the effects of sludge application on the minor vegetation. Vegetation parameters which were measured included relative percent cover, height, and biomass of individual species on systematic transects, as well as plot-wide Braun-Blanquet cover-abundance estimates. Relative percent cover was …
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Vegetation Response After Invasive Tamarix Spp. Removal in the Riparian Zone and Semi-Arid Rangeland Ecosystems
… Western, riparian habitat; however monitoring of vegetation after removal is often neglected and thus opportunity for adaptive management lost. To address this need, I have conducted three and half years of monitoring vegetation response after invasive <em>Tamarix</em> removal in twenty-five sites …
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Soil Genesis and Vegetation Response to Amendments and Microtopography in Two Virginia Coastal Plain Created Wetlands
… incorrect hydrology, and failure of targeted vegetation establishment. Organic matter (OM) amendments help created wetlands attain these functions quicker, but, their long-term effects are seldom reported. This research's purpose was to measure the long-term effects of treatments at a sandy …
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Vegetation response of a Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) community to 6 mechanical treatments in Rich County, Utah
… the effects of 6 mechanical treatments and revegetation of a Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) community in northern Utah that were treated in the fall of 2001 and spring of 2002 (aerator only). Disking and imprinting killed 98% of the sagebrush and significantly …
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A Remote sensing change detection study in the arid Richtersveld region of South Africa
… technologies in order to investigate possible vegetation cover changes that have taken place over time, and which have manifested through a combination of threats to the region. Te aims of the study were adressed using three key questions that sought to gainan understanding of the relationship …
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Examining Drivers of Post-Wildfire Vegetation Dynamics Across Multiple Scales Using Time-Series Remote Sensing
Ecosystem response to disturbance is a function of environmental factors interacting at a number of spatio-temporal scales. This research explored ecosystem response to wildfire as a function of local and broad-scale environmental factors using satellite based time-series remote sensing data. This …
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Vegetation change in response to climate extremes in Limpopo Province, South Africa
… in climate extremes exert much pressure on the vegetation cover, thereby threatening the ecological stability of an area. This study analysed changes in vegetation cover and responses to extreme climate and weather events in the Limpopo Province, South Africa. The specific objectives of the …
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Evaluating heat mitigation by urban canopy in New York City’s public housing developments
… and develop process-level understanding of vegetation response to heat waves in order to improve estimates of heat mitigation in the face of extreme heat.</p> <p>Surface temperatures are generally higher in cities than surrounding rural areas due to anthropogenically altered land cover. This …
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Analysis of Fossil Pollen from a Pleistocene Cypress Forest Preserved on the Northern Gulf of Mexico Continental Shelf
… Forest or DF). This research aims to establish vegetation composition on a continental shelf glacial refuge and provide a better understanding of vegetation response to sea-level rise. Two cores (15DF1 and 15DF3B) located at different locations within the forest were recovered and analyzed. …
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Understanding Carbon Uptake Using Multi-Scale Novel Remote Sensing Techniques
… are new challenges in understanding dryland responses and vulnerability. This has emerged as a priority research frontier because dryland carbon dynamics have been identified as disproportionately important in regulating interannual variability of atmospheric CO2 concentrations. Remote …
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Determining an Appropriate Organic Matter Loading Rate for a Created Coastal Plain Forested Wetland
… and 3) the growth and vigor of hydrophytic vegetation. The study contained wet (CCW-Wet) and dry (CCW-Dry) experiments, each receiving 6 compost treatments (0 Mg/ha untilled and 0, 56, 112, 224, and 336 Mg/ha tilled). Over the 1.5-year monitoring period, redox potential decreased and …
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Vegetation and Forest Fire Dynamics in Alberta: A Ground and Remote Sensing Data Analysis
… of the interplay between forest fires and vegetation dynamics in Alberta, Canada, under the lens of climate change. By synthesizing data from remote sensing, climate records, and fire databases, the study reveals the intricate relationships between vegetation cover changes and climatic …
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Soil Moisture Dynamics and Thresholds for Surface Energy Balance Regime Transitions: An Observational Analysis at a U.S. Grassland Site
… dynamics during drydowns are most likely a response to changes in soil moisture content. These findings challenge the assumption that θ* is solely texture-dependent and highlight the need to account for dynamic environmental controls in modeling surface energy exchange. This research …
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Determining primary drivers of river bead functionality in mountain headwater streams
… of geomorphic and biotic system inputs, and response variables, which are proxy variables believed to most accurately reflect flux travel time and storage magnitude, assuming that functional beads contribute to higher travel times and storage magnitudes. Geomorphic driver variables include …
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Effects of hurricanes and fires on southeastern savanna-forest landscapes
… treatments would influence fire intensity and vegetation response. Both canopy disturbance and fuel addition influenced the behavior of subsequent fires. In addition, the two main hurricane effects interacted to increase maximum fire temperatures. High fuel loads and fire resulted in …
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