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 8 of 8 for “"Species Risk"”.
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The Evolution of Natural Plant Communities through Crop Migration and Crop-to-weed Gene Flow
… engineered crops on native and weedy plant species. Risk assessment of GE crop varieties focuses on two main areas: feralization of crop systems and crop-weed hybridization. Risks include naturalization, transgene introgression, and the formation of novel genotypes in natural systems. In …
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Host-Pathogen Ecology: Effects of Species Ecology and Environmental Factors on the Intensity and Distribution of Disease Among Illinois Amphibians
… in their involvement and severity according to species, geography, environment, and individual response (Wake and Vredenburg 2008; Gahl et al. 2011). One of those threats has caused population declines globally (Stuart et al. 2004), <italic>Batrachochytrium dendrobatidis</italic> …
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Visualising continuous intra-landscape isolation for brushtail possums using least-cost modelling
… processes such as the spread of invasive species. It is therefore important to be able to produce maps that visualise how isolation changes across a landscape in order to enable better invasive species risk assessments to be undertaken. Many methods exist for quantifying isolation using a …
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The Ontogeny of Escape Responses and Locomotor Performance in Sceloporus Woodi
… predators is of primary importance; however prey species risk detection by movement. Other than crypsis, prey species also use secondary defenses when detected by a predator. The most common secondary defense is flight. Flight initiation distance describes the distance between a prey item and a …
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Ecological implications of introducing Leucaspius delineatus (Heckel, 1843) and Pseudorasbora parva (Temminck and Schlegel, 1842) into inland waters in England
Non-native species invasions threaten the structure, function and biodiversity of ecosystems worldwide, and those of non-native fishes pose amongst the greatest threats to inland waters of the U.K. This PhD investigated the establishment, dispersal and ecological implications of introducing the two …
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DEVELOPMENT AND APPLICATION OF A CENSUS-BASED REGIONAL RESIDENTIAL GROWTH MODEL FOR BIODIVERSITY RISK ASSESSMENT
… RESIDENTIAL GROWTH MODEL FOR BIODIVERSITY RISK ASSESSMENT Stephen D. Smith, Ph.D. Cornell University 2018 The USGS National GAP Program is a biodiversity mapping program implemented at the state level via the Cooperative Fish & Wildlife Research Units (CFWRU). The New York CFWRU completed …
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Conservation Through Population Assessments Across Variable Landscapes
… viability analyses to both assess and manage species’ health. The results of these analyses often play a key role in determining when intervention is necessary and which actions will be the most successful. Within this dissertation, I used several population modeling approaches to advance our …
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Essays on Dynamic Optimization for Forest Resource Management
… the ecosystem collapse and invasive species control problems. The first two papers consider the shift from primary forests to cleared land and secondary forests in the context of deforestation. This process is known to lead to irreversible tipping points that lead to the loss of …