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 79 for “"cover type"”.
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The correlation between available deer browse, forest cover type, and forest site
… browse in the understory of a particular forest cover type and several site quality measurements. The purpose of the study was to determine if weights of browse per acre could be estimated reliably by utilizing easily obtained site quality measurements instead of clipping and weighing browse. …
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The influence of bed cover type (gravel vs plastic) on container-grown plants
Growers report that plants on a gravel bed cover often require more frequent irrigation compared to plants on a plastic bed cover. Three experiments were conducted to determine the cause of this reported observation. The objective of Expt. 1 was to determine if bed cover type (gravel or plastic) …
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American Woodcock Singing-ground Surveys in the western Great Lakes region: assessment of woodcock counts, forest cover types along survey routes, and landscape cover type composition.
… relationship between woodcock counts and land-cover composition along survey routes using an Information-Theoretic modeling framework. The amount of early successional forest, open space, and a landscape metric Interspersion and Juxtaposition Index (IJI) best explained counts in Wisconsin; in …
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Vegetation patterns along the Middle Fork of the Flathead River, Glacier National Park, Montana
… necessary to support distinct vegetation cover types and key indicator species along the Middle Fork of the Flathead River were identified and quantified. The natural flow regime of the Middle Fork was described in terms of the magnitude, frequency, and duration of discharge. Vegetation …
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Competitive status of red spruce (Picea rubens) and Fraser fir (Abies fraseri) at ecotonal transitions in southern Appalachian sky islands
… Fraser fir, and competing hardwoods between cover types and slope aspects at six sky islands. We created linear models to test effects of aspect, cover type, and year on basal area growth measurements of red spruce, Fraser fir, and hardwoods to assess effects of competition. Growth rates were …
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Selection of landscapes by male ruffed grouse during peak abundance.
… to interpret because it was confounded by cover type dominance in landscapes. The proportion of the aspen cover type was positively correlated (R= 0.55), and the proportion of the conifer cover type was negatively correlated (R= -0.79) with Shannon‘s Evenness Index. The top ranked model in …
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Large-scale habitat relationships of neotropical migratory birds
… characteristics of each site by analyzing coverages of each site from Quantico’s GIS database using FRAGSTATS. Landscape patches were defined using 2 different classification schemes to determine if both SAF cover type and generalized habitat classifications could be used to determine which …
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Seasonal range analysis for white-tailed deer on the Broad Run Wildlife Research Area
The mixed oak-pine cover type was evaluated as white-tailed deer range on four study areas by measuring dry matter production of key forages and determining their nutrient composition. Composite diets containing plant species which represented the major portions of each seasonal diet as indicated …
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Soil Carbon and Nutrient Cycling Across Cover Types in Southern Appalachian Hardwood Forests
… (Rs ) and nutrient dynamics among four distinct cover types, white oak (WO, Quercus alba L.), scarlet oak (SO, Quercus coccinea Muech.), chestnut oak (CO, Quercus montana Wild.) and a pine-oak co-dominant cover (PO, Pinus spp. and Quercus spp. (primarily Pinus pungens Lamb. and Q. montana)). Null …
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Elk summer-autumn habitat selection in the Clearwater Basin of north-central Idaho
… proportion analysis to compare satellite derived cover type and forest cover to the true on-the-ground cover type and forest cover classification. All habitats had over 85% accuracy in the cover type validation analysis and 84% in the percent forest cover validation analysis. To assess the …
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The relationships between the forest fuels and vegetation of Richmond National Battlefield Park, Virginia
… of dead and down forest fuels in 6 forest cover types on the upper Coastal Plain of Virginia, specifically in the Richmond National Battlefield Park, and to determine the relationships between the fuels and the vegetation. The forest fuels and vegetation were sampled in stands of the …
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Deadwood Dynamics: A Case Study at Prince William Forest Park, Virginia
… fixed radius plots along the gradient of forest cover types, aspect, elevation, and soil orders found within PRWI. Forest cover type was significant in the generalized linear model for percent dead basal area, total DWM, fine woody material, litter, and duff mass. The Virginia pine (Pinus …
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Using satellite remote sensing to model and map the distribution of Bicknell's thrush (Catharus bicknelli) in the White Mountains of New Hampshire
… and decreasing distance to nearest Fir Sapling cover type. To solve the model at all locations required regressor estimates at every pixel, which were not available for the dominant vegetation height and elevation variables. Topographically normalized imagery features Normalized Difference …
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The effects of grass invasion and fire severity on Acacia koa regeneration
… data often fails to accurately measure grass cover underneath forest canopies. The 2018 Keauhou Ranch Fire in Hawaiʻi presents an opportunity to investigate grass, fire, and native tree interactions while simultaneously testing the accuracy of a novel method of remote grass measurement. In …
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Evaluation of landscape level habitat characteristics of golden eagle habitat in Northwestern Mexico
… territories and found similar composition of cover type, vegetation structure and prey indices between the territory cores and their buffer zones. Distance to most anthropogenic disturbance sources was similar between golden eagle sites and random areas (n=60). Grassland was the most common …
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Bats of the Monongahela National Forest
… 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 variables within these models, although results varied among species. By understanding these foraging habitat associations and …
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Nest-site resources for cavity-nesting birds in the southern Allegheny Mountain forests of West Virginia
… due to the juxtaposition and diversity of forest cover types. Management must focus on monitoring wildlife population levels as well as habitat requirements within each cover type. Cavity tree abundance significantly differed among central hardwood (x¯ = 16.4; SE = 5.3), northern hardwood …
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Patterns of Taxonomic, Functional, and Phylogenetic Diversity, and Ecological Drivers of Stream Fish Assemblages in East Texas
… stream order, wetted width, different land cover types). The ecological niche model created using random forest algorithms outperformed the maximum entropy approach, and factors related to channel morphology (e.g., stream order, slope) and land cover type (e.g., agriculture) were important …
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Land Use Changes and Pheasant Declines in Eastern South Dakota
… was censused, nesting densities determined, cover was mapped, and an interspersion index determined in 197 7 and 1978. Comparison to a similar study conducted in 1958 and 1959 indicated a decrease in pheasant numbers of 93% for crow counts and 94% in brood counts. Nesting densities decreased …
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