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 12 of 12 for “"Conifer Forests"”.
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How do ecological restoration treatments affect understory plant communities in dry conifer forests of the Colorado Front Range?
… restoration efforts are progressing in dry conifer forests across the western United States to increase resilience to fire and other disturbances. While such treatments primarily aim to create overstory change, impacts beyond the canopy should also be considered – such as effects on …
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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
… fire regime is evident in the temperate mixed-conifer forests of the Sierra Nevada region of California. This thesis employs a mixed-methods approach of remote sensing, field surveys, and statistical analysis to investigate the effects of fire events of extreme size, frequency, and severity on …
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Forest Densification Over 85 Years in a Sierra Nevada Mixed-Conifer Forest Decreases Conifer Regeneration and Limits Survival
… of fire suppression in Sierra Nevada mixed conifer forests has decreased conifer regeneration and survival. Increases in overstory biomass and decreases in canopy heterogeneity, along with decreases in shrub cover in the understory, has created unfavorable establishment site conditions for …
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Changes in landscape patterns and associated forest succession on the western slope of the Rocky Mountains, Colorado
… to assess changes in major vegetation types (coniferous forest, aspen forest, rangelands) on the western slope of the Rocky Mountains, Colorado, U.S.A. The photographs span a period of 80 to 110 years, thus representing a century of change since the large mining-related disturbances associated …
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The 2006 Warm Fire: effects on habitat and prey species of the northern goshawk
… of fire in Southwestern ponderosa pine and mixed-conifer forests since initiation of forest management early in 20th century changed the composition and structure of the forest habitats of the northern goshawks (Accipiter gentilis), a food-limited species of conservation concern, and the birds and …
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Determining Habitat Associations of Virginia and Carolina Northern Flying Squirrels in the Appalachian Mountains from Bioacoustic and Telemetry Surveys
… of the northern flying squirrel found in montane conifer-northern hardwood forests the Appalachian Mountains of the eastern United States. Both subspecies were listed under the Endangered Species Act in 1985 as endangered, and accordingly, the Virginia northern flying squirrel and the Carolina …
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Long-term effects of prescribed fire on vegetation structure, dynamics, and tree growth in red pine (Pinus resinosa Ait.) forests in north central Minnesota.
… use of burning treatments in northern temperate conifer forests has at times received considerable attention, the long-term (>10 years) effects on forest structure and development have not been quantified. We describe the persistence of prescribed fire effects in a mature red pine (Pinus resinosa …
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Holocene Fire History Reconstruction of a Mid-Evaluation Mixed-Conifer Forest in the Eastern Cascades, Washington
Fire histories of mid-elevation mixed-conifer forests (MEMC) are uncommon, particularly in the eastern Cascades of Washington. As a result, fire regimes and the effects of 20th century fire suppression in these forests are not well understood. In the summer of 2014 a 7.80 meter-long sediment core …
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Impact of Isotopic Heterogeneity in Shallow Systems on Modeling of Stormflow Generation
… is generally slightly enriched in ^18O in conifer forests relative to deciduous forests. However, throughfall shows little evidence of evaporative fractionation; instead, the high deuterium-excess values suggest considerable exchange with re-evaporated waters. A 490-m^2 artificial catchment …
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Potential for unmanned aerial systems to inform ponderosa pine restoration: evaluation of horizontal and vertical complexity monitoring
Over the last two decades, the restoration of dry conifer forests has increasingly prioritized the reintroduction of horizontal and vertical complexity. This emphasis has come from research showing that increased spatial complexity in forest structures is necessary to restore past ecological …
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Advanced Methods for Change Detection in LiDAR Data and Hyperspectral Images
… of 3-D changes at the individual tree level in conifer forests using bitemporal LiDAR data. Unlike most of the literature techniques, the method performs an object-based CD to estimate both the vertical and horizontal growth of the individual tree-crown working directly in the point cloud domain …