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 49 for “"beavers"”.
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Food Habits and Ecology of Beavers in Southeastern Virginia
… reported in the literature as food for beavers. Beaver were found to be active year-round, building an extensive food cache but using it only lightly.</p>
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The ecological role of beavers (Castor canadensis) in a Southwestern desert stream
The ecological impact of beavers on a stream in the southwestern United States was investigated to determine if beavers have impact on community and ecosystem level processes in a manner similar to what has been documented in more mesic regions. Specifically, my goals were to determine: (1) whether …
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The Rewilding of New York's North Country: Beavers, Moose, Canines and the Adirondacks
… project examines the restoration histories of beavers (Castor canadensis), moose (Alces alces americana), and wild canines (Canis spp.) within the Adirondack Highlands of northern New York. Devastated by the depredations of nineteenth century woodsmen, the populations of these large mammals …
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The Rewilding of New York's North Country: Beavers, Moose, Canines and the Adirondacks
… project examines the restoration histories of beavers (Castor canadensis), moose (Alces alces americana), and wild canines (Canis spp.) within the Adirondack Highlands of northern New York. Devastated by the depredations of nineteenth century woodsmen, the populations of these large mammals …
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Wolf Predation: Where and How Wolves Kill Beavers, and Confronting the Biases in Scat-Based Diet Studies
<p>Beavers can be a significant prey item for wolves in boreal systems but how wolves hunt beavers is largely unknown. I inferred how wolves hunt beavers by identifying 22 kill sites using clusters of locations from GPS-collared wolves in Voyageurs National Park, Minnesota. Where wolves killed …
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The status of beavers in the delta area of the San Joaquin River, San Joaquin County, California, 1950-1951
… to designate this area.</p><p>The part played by beavers in the exploration and colonization of this nation was a very important one. The fur trappers in their quest for new areas in which to trap, vigorously explored unknown regions. Knowledge concerning the geography of the new land was passed …
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Famílias com desenvolvimento funcional e disfuncional : validação das escalas diagnósticas faces iii, beavers-timberlawn e escala global do funcionamento internacional (garf)
… do funcionamento familiar (FACES III, Beavers-Timberlawn e GARF) em trinta e uma famílias, examinadas na clínica, visando sua validação, em nosso meio, em relação ao padrão-ouro da avaliação clínica, feita através de entrevista familiar semi-estruturada. Também estudou-se o …
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Beaver (Castor Canadensis) Impacts on Herbaceous and Woody Vegetation in Southeastern Georgia
North American beavers are considered ecosystem engineers. Their activities can quickly and drastically alter habitat properties and perhaps permit highly aggressive colonizing plants, notably non-native species, to invade and potentially dominate. This study examined if beavers in southeastern …
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A Human-Centered Approach to Designing an Invasive Species Eradication Program
… private landowners make between the presence of beavers and impacts to the ecosystem services in their riparian areas, and 2) explore the role of a market-based incentive program to increase landowner cooperation in eradication efforts. Through semi-structured interviews, I elicited landowner …
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Plant Community Invasibility in Riparian Landscapes: Role of Disturbance, Geomorphology, and Life History Traits
… chapter examines the spatial association of beavers, <italic>Tamarix</italic>, and <italic>Salix</italic> and the hypothesis that beavers may contribute to <italic>Tamarix</italic> dominance through selective foraging of <italic>Salix</italic>. The third chapter describes a regional survey of …
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Decoupling methods for the time-dependent Navier-Stokes-Darcy interface model
… to solve a coupled unsteady NS-Darcy system with Beavers-Joseph-Saffman-Jones (BJSJ) interface condition and obtain optimal error estimates. Second, a parallel NIDDM is developed to solve unsteady NS-Darcy model with Beavers-Joseph (BJ) interface condition, which is much more complicated than BJSJ …
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ECOHYDROLOGICAL MODELING OF BEAVER DAMS
Beavers (Castor canadensis and C. fiber) are expanding in their native range in North America and Eurasia and are expanding their range into urban environments and the Arctic tundra. Outside their natural range, they are also in Southern Patagonia because of historic releases in the fur industry. …
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Effects of forest management, prey, and predators on the habitat selection of fishers in the South Cascades of Washington.
… snowshoe hares (Lepus americanus) and mountain beavers (Aplodontia rufa). I identified a potential disconnect between preferred habitats of fishers and two common prey species, mountain beavers and snowshoe hares. In the second chapter, I examined the relative importance of landscape features …
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Neutronic analysis of selected fuel assemblies of the MIT BEAVRS benchmark using HEADE collision probability code
… the use of fresh fuel as one state of the BEAVERS benchmark. Parameters such as the kint, power profiles, flux profiles and group constants were evaluated for selected fuel assemblies taken from the MIT BEAVRS benchmark reactor core. In this study, the applicability of the HEADE collision …
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Synthesis Of 1,3-Dicinnamoyl-2-Acetylglycerol, A Natural Product Derived from Genus Populus that Demonstrates Beaver Repellent Properties
… have been observed to be ignored by foraging beavers in favor of adult trees, despite a nutritional advantage possessed by the sprouts. This unexpected behavior has been found to be related to the presence of a yet undescribed compound present in sprout bark, concentrations of which are …
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A Study of Beaver Pond Morphology and Site Characteristics After Disturbance in Eastern Glacier National Park, Montana
… ponds, which is important to understanding beavers’ interactions with the environment. Three sites with beaver-pond sequences in Glacier National Park in northwest Montana were chosen for study, including sites near Saint Mary Lake, Lake Sherburne, and Lower Two Medicine Lake. The Saint Mary …
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Variational data assimilation for two interface problems
… equation and the Stokes-Darcy equation with the Beavers-Joseph interface condition. By using Tikhonov regularization and formulating the VDA into an optimization problem, we establish the existence, uniqueness and stability of the optimal solution for each concerned case. Based on weak …
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