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 55 for “"forest type"”.
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Foliar Herbivory on Understory Oaks as a Function of Forest Type and Prescribed Burning
… has not been well characterized in Ozark forests, but may be a critical variable affecting current and future forest health. This study quantified loss of oak seedling and sapling leaf area to insect herbivores in recently burned or unburned Ozark forest and savanna habitat. In addition, I …
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Floristic and dynamics of Sand Forest, a subtropical dry forest type in South Africa
Unlike most dry forests, Sand Forest has been largely untransformed by human activity until very recently, and provides a rare opportunity to investigate the dynamics of old-growth dry forests. Twinspan classification and DCA ordination (Detrended Correspondence Analysis, an indirect gradient …
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Acidification and eutrophication of forests on sandy soil: effects of forest type and deposition load
Forests on sandy soil did clearly acidify during the past decades, what was found to be related to high depositions of potentially acidifying compounds to the forest floor. Several factors are a stimulus for high atmospheric deposition load in these types of forest ecosystems. (1) Forests are often …
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Forest Mortality in Lake Tahoe Basin from 1985-2010: Influences of Forest Type, Stand Density, Topography and Climate
Widespread and synchronous outbreaks of forest mortality during the 1990s and continuing to present day have drastically altered millions of hectares of forestlands from Mexico to Alaska (Bentz 2009). Tree mortality is a complex process with a variety of both exogenous and endogenous factors …
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Modeling the Distribution of the Northern Hardwood Forest Type in Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus) Recovery Areas of the Southern Appalachians
The northern hardwood forest type is a critical habitat component for the endangered Carolina northern flying squirrel (CNFS; Glaucomys sabrinus coloratus) for denning sites and corridor habitats between montane conifer patches where the squirrel forages. This study examined terrain data, and …
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Forest recovery trends following an unprecedented mountain pine beetle outbreak in the southern Rocky Mountains
… the structure and composition of lodgepole pine forests will look like as they recover. I used Forest Inventory and Analysis data collected by the US Department of Agriculture Forest Service, together with hierarchical cluster analysis, to separate 626 subplots into unique forest type groups …
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Ecology of greater gliders, Petauroides Volans Kerr 1792, in relation to variations in habitat quality in eucalypt forests in south-east New South Wales
… of the arboreal marsupial fauna of the eucalypt forests near Eden, New South Wales were primarily determined by the concentrations of nitrogen, phosphorus and potassium in the mature foliage of the eucalypts. I investigated this hypothesis in relation to the Greater Glider Petauroides votans. The …
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Ecology of greater gliders, Petauroides Volans Kerr 1792, in relation to variations in habitat quality in eucalypt forests in south-east New South Wales
… of the arboreal marsupial fauna of the eucalypt forests near Eden, New South Wales were primarily determined by the concentrations of nitrogen, phosphorus and potassium in the mature foliage of the eucalypts. I investigated this hypothesis in relation to the Greater Glider Petauroides votans. The …
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Predicting forest cover types in Southwestern Virginia using topographic information
… between physical site factors and existing forest communities in southwestern Virginia. A pair of dichotomous keys was produced that "predicted" the forest type most likely to occur in an area based on topography. Maps of predicted forest types, using the Trayis (1982) and SAF (1980) …
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The Effects of Prescribed Burning by the National Park Service on Pine -Oak Forests Within Great Smoky Mountains National Park
… has implemented prescribed burning of pine-oak forests in an attempt to restore and maintain this fire-dependent forest type, which is converting to a mesic broadleaf forest after a long period of fire suppression. One goal of the burning is to create suitable habitat for the red-cockaded …
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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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Landscape forest modeling of the Luquillo Experimental Forest, Puerto Rico.
… thesis contributes to modeling the dynamics of forest community response to environmental gradients and disturbances over a mountain landscape. A gap model (FACET) was parameterized for species of various forest types (Tabonuco, Colorado, Dwarf and Palm), for many terrain conditions and was …
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DISTRIBUTION AND MOLECULAR ANALYSIS OF AVIAN MALARIA VECTORS ON FOUR CENTRAL VIRGINIA PROTHONOTARY WARBLER (PROTONOTARIA CITREA) BREEDING SITES
… sites. Geographic factors, such as crop land and forest type, were determined to be potential indicators for species abundance variation between sites. Of the mosquitoes collected, ninety one (0.4%) were identified as blood fed. The blood fed mosquitoes were found to have fed on avian, mammalian, …
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Bats of the Monongahela National Forest
… of bats found in the Monongahela National Forest of West Virginia were analyzed, using maximum entropy modeling and mist-netting data from 1997 through 2012. Forest type, hydrologic features, elevation, land-cover type, and distance to caves were typically the most important explanatory …
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Comparison of Techniques for Estimation of Forest Soil Carbon
… than those using unfilled tables. The USDA Forest Service collects and maintains detailed inventory data for the condition and trends of all forested lands in the United States. A wide range of researchers and landowners use the resulting Forest Inventory and Analysis (FIA) database for …
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Geographic distribution of tree species diversity of the United States reveals positive association between biodiversity and site productivity
… due to anthropogenic factors, especially in forested ecosystems, it has become more urgent than ever to understand the biodiversity-ecosystem functioning relationship (BEFR). BEFR research in forested ecosystems is very limited and thus studies that incorporate greater geographic coverage and …
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Systematic conservation planning and South Africa's Forest Biome: An assesment of the conservation status of South Africa's forest and reccomdentations for their conservation
… conservation plan for the entire South African forest biome. This was done by addressing the following questions: What is the current state of the forest biome? How well are forests protected? How threatened are they? What are the conservation priorities, and what needs to be done to improve …
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Ecological Factors Influencing Infection Rates of the Birch Polypore Inonotus obliquus in the Laurentian Mixed Forest Province
… </em>spp<em>.</em>) trees in northern hardwood forests around the world, has been harvested intensively in recent years for its potentially medicinal properties. However, there is a dearth of ecological understanding of this fungus; even basic infection rates tend to be anecdotal or lack …
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