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.
Results
Showing 1 to 14 of 14 for “"environmental correlates"”.
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Environmental correlates and associations of tuart (Eucalyptus gomphocephala) decline
… involved collecting data on a wide selection of environmental factors considered to be important to canopy condition. These included factors of stand structure, understorey composition,landform (soil type, geology, topography, and geography), climate (gradients and change), hydrology (depth, …
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Endemism and richness in the Cape floristic region: phytogeographic patterns and environmental correlates in a global biodiversity hotspot
… the core CFR were assessed against contemporary environmental conditions, using a spatially sensitive regression technique. A combined dataset of 4414 taxa was analysed, of which 4000 were recorded in the general CFR area. This represented 44.4% of the 9087 total taxa recorded in the CFR, and the …
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Young people’s active travel in Asia
… its associations with physical activity and environmental factors, and explore how it is discussed in urban- related policies. **Study 1** I first investigated the association between school travel modes and physical activity levels among young people in Asia. I used an accelerometer-assessed …
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The macroecological distribution of avian functional diversity: environment, extinction risk and protected area coverage
… wide-ranging species. By identifying the main environmental correlates of FD, factors associated with extinction risk and current FD protection, these findings could help identify areas at future risk of decreasing delivery of ecosystem processes.
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Natural History and Ecology of the Flatwoods Salamander, <em>Ambystoma cingulatum</em> on the Atlantic Coastal Plain
… museum specimens. Topics examined include environmental correlates responsible for and inducing breeding migrations, larval growth and developmental rates, metamorph size and emergence, seasonal activity patterns, and conservation considerations. Factors influencing breeding migrations were …
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The importance of hydrologic refugia for the diversity of the Cape Flora
… narrow-range endemics (WD-NREs) and explore the environmental correlates of these distributions. I make use of Quarter degree square grid cells as a measuring unit, which are larger (~20 km across), than the scale at which microrefugia typically occur, however, the broad environmental …
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Investigating the decline of the Martial Eagle (Polemaetus bellicosus) in South Africa
… biome where tree density is higher. Examining environmental correlates of these population changes provided some support for two hypotheses on the causes of these declines, with climate change (increases in temperature) and power line densities negatively associated with changes in reporting …
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Spatially explicit null models in biogeography: Toward a multi-scale understanding of the niche.
… relative contributions of null model results and environmental correlates. I have developed a novel null methodology to predict the niche of a species, or a group of species; I applied this at local and regional scales to examine null spatial distribution predictions for a single, endangered …
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Electronic Medical Records in Acute Care Hospitals: Correlates, Efficiency, and Quality
… is to examine the organizational and environmental correlates of hospital EMR use and to examine the relationship between hospital EMR use and performance. Using a theoretical framework that combines resource dependence theory with Donabedian's structure, process, outcome model, a …
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Reconstructing the late pleistocene palaeoenvironment of the Richtersveld using fossil charcoal
… Karoo, relatively little is known about its environmental history and how an important core of this region, Namaqualand and its subregion the Richtersveld, may have responded to Pleistocene changes. Recent excavations at Spitzkloof Rockshelter A in the Richtersveld have provided a rare source …
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Enhancing Youth Access to Community Recreation Facilities: An Effectiveness Evaluation of the Grade 10 Community Physical Activity Pass
… influenced by intrapersonal, interpersonal, and environmental factors. Most recently, emphasis has been placed on the environmental correlates of youth physical activity. One consistent finding is that access to recreation facilities and opportunities to be active are positively associated with …
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Effects of abiotic and biotic factors on population dynamics of brook trout (<i>Salvelinus fontinalis</i>) within Shenandoah National Park, Virginia
… this work, I explore the relationships between environmental correlates (e.g., streamflow, temperature) and brook trout abundance and recruitment in Shenandoah National Park, VA for the first time. In Chapter 1, I use generalized linear mixed-models and long-term fish collections data from the …
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A Biogeographic Analysis of the Socially Polyphenic Spider <em>Anelosimus studiosus</em> in East Tennessee.
<p>Microclimates associated with environmental and geographic factors directly affect the ability of an organism to survive in a particular area. Survival is affected by: predator/prey abundance, temperature, relative humidity. A group of organisms that are particularly prone to habitat sensitivity …
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Shifting towards healthier transport? From systematic review to primary research
… rigorous study designs. Understanding of how environmental and policy factors may influence active travel and physical activity currently relies heavily on evidence from cross-sectional studies of correlates rather than intervention studies. I therefore took advantage of the opportunity …