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 20 for “"Exotics"”.
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Statistical interpretation of exotics monojet data in search of an invisibly decaying Higgs Boson
Following the recent discovery of a Standard Model Higgs-like particle at the Large Hadron Collider, this study searches for the evidence of invisible decays of this particle. Assuming that this is the Standard Model Higgs boson, its decay to invisible particles is not expected to be measurable in …
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Determinants of native and exotic plant species diversity and composition in remnant oak savannas on southeastern Vancouver Island
… relationship by each affecting natives and exotics in opposite ways. Road density and climate were also the dominant predictors of native and exotic composition at the regional scale. Patterns in the patch occupancy of individual species confirmed the importance of these factors but I found …
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Exotic Armored Catfishes in Texas: Reproductive Biology, and Effects of Foraging on Egg Survival of Native Fishes (Etheostoma fonticola, Endangered and Dionda diaboli, Threatened)
… been concern that breeding populations of these exotics could affect native species through dietary overlap, egg predation, and other factors. This study focused on two related topics: 1. the reproductive biology of Hypostomus in the San Marcos River, Texas; and 2. the potential effect of the …
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Strangers Among Us: Invasive Plants In British Literature, 1669-1800.
… to human desire. Most accounts view these exotics through the lens of ecological imperialism and “invasive” species. Both of these terms are twenty-first century metaphors that materialize the role of imperialism in circulating exotics, applying the narrative of invading British empire to …
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Competition Between Native and Exotic Daphnia
… Of particular concern are the possibilities that exotics may displace native taxa and alter trophic interactions. In situ field experiments, using replicated 1.6 liter Plexiglas and Nitex-mesh enclosures, were conducted to study competition between the exotic D. lumholtzi and the native species …
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Fremont Finery: Exchange and Distribution of Turquoise and Olivella Ornaments in the Parowan Valley and Beyond
… A.D. 1 and A.D. 1350 (Talbot 2000a). Research on exotics in the Fremont area, specifically turquoise and Olivella shell, has been sporadic until recently (Hughes and Bennyhoff 1986; McDonald 1994; Janetski 2002). In this thesis, I present new data on Olivella and turquoise artifacts found …
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Ecological Investigations of Chukars in Western Utah
… slightly (two species at three sites) by other exotics. These three manuscripts illuminate several areas of Chukar ecology and represent a significant advancement in our understanding of this bird and its management.
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The Effects of Fire on the Vernal Herbs of an Eastern Mesic Forest
… of rare and common species, and density of exotics in the vernal herbaceous layer. To determine these effects, three sites in central Kentucky were surveyed prior to and following one of three treatments: spring burn, winter burn, or negative control. I conducted low-intensity spring burns …
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Investigation of the relationships between biomass reduction, soil disturbance, soil nutrients and weed invasion in basalt plains native grassland remnants in Victoria, Australia
… quickly, and prevent large scale growth of exotics. The management of lowland grassland remnants with low levels of flatweeds and annual grasses will likewise depend on the maintenance of a healthy sward of native vegetation which can keep available nutrients in the soil at low levels, …
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Biology of the Rare Woodland Perennial Trillium Pusillum Micheaux (Liliaceae) in Southwest Missouri
… by ants. These data suggest that invasion by exotics, a higher soil pH, a shift in dominance of tree canopy species to one with allelopathic properties (J. nigra), low light levels, possible pollinator limitation, and seed dispersal by harvestment may be associated with the low population and …
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Habitat Requirements and Foraging Ecology of the Madagascar Fish-Eagle
… predator. Replacement of native fish species by exotics, thus, probably has not been detrimental to the island's fish-eagle population. Male fish-eagle foraging success was positively correlated with number of fish, total fish weight, and number of fish species, which suggests that declines in …
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Using patchy plant invasions to understand how diffuse interactions modify facilitation and competition
… interactions that occur among natives and exotics ultimately structuring plant communities on natural landscapes.</p>
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Using patchy plant invasions to understand how diffuse interactions modify facilitation and competition
… interactions that occur among natives and exotics ultimately structuring plant communities on natural landscapes.</p>
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Factors Affecting Songbird Richness, Abundance, and Nest Survival in Riparian Forests in a Midwestern Agricultural Landscape
… Finally, I examined mid-season leaf drop in exotics as a mechanism by which they may negatively influence nesting success of songbirds, using Northern Cardinal (Cardinalis cardinalis) as a focal species. I found that nest concealment in exotic shrubs decreased in midsummer whereas nest …
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Computed tomography of the thorax and abdomen of the clinically normal common marmoset (Callithrix jacchus)
… need to be critically assessed and adapted for exotics, such as the common marmosets. Imaging findings differed from described anatomic findings (such as positioning of kidneys in relationship to lumbar vertebrae) and could either be due to different study population, imply more mobility of …
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Exotic Species Invasion and Biodiversity in Bangladesh Forest Ecosystems
… are used to determine these relationships. Most exotics are trees followed by shrubs and herbs. Fabaceae and Asteraceae contribute a large proportion of exotic species. Most of them originated from other tropical areas. Native species richness was found to be the best predictor for the number and …
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Searches for Diboson New Physics and the L1Calo Software Development with the ATLAS Detector
The Standard Model has been a successful theory in describing the behaviour of fundamental particles, but there are still problems remaining unsolved. New theoretical models are therefore proposed to answer those questions with either new interactions or new particles. This thesis is presenting the …
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Analysis of the "nurse-tree effect" of exotic shelter trees on the growth of the indigenous Podocarpus falcatus in an Ethiopian montane forest
… of indigenous saplings under the canopy of exotics has been termed “nurse-tree effect”. In the Munessa-Shashamene Forest, a tropical montane forest in Ethiopia consisting of plantations of exotic tree species and remnants of natural forest, regeneration and an enhanced growth of native …
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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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Patterns of association in a co-introduced insect herbivore and parasitoid wasp
… prevalence of native species host switching to exotics, and vice-versa. For the remainder of my dissertation, I used molecular methods to determine the invasion routes of the herbivorous parsnip webworm (Depressaria pastinacella; Lepidoptera: Depressariidae), and its primary parasitoid, …