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 116 for “"Climatic variables"”.
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The influences of atmospheric nitrates and annual climatic variables in predisposition to winter desiccation injury in Fraser fir and red spruce
… to the level of atmospheric nitrates and climatic parameters of precipitation and temperatures was investigated. Data and foliage samples were collected from established field plots at 5500, 6000, and 6500 feet in the Black Mountains of North Carolina and from seedlings under 4 treatments …
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The distribution and population structure of Aloe pillansii in South Africa, in relation to climate and elevation
… due significantly to environmental and climatic variables and therefore it is potentially at risk given anthropogenic climate change predictions. The total South African A. pillansii population investigated is made up of 1202 individuals and is found in the Richtersveld, which is part of …
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An analysis of vegetation pattern and its relationship to NDVI data in the Namaqualand area, South Africa
… greater Namaqualand area and to relate them to climatic variables. To do this we used the normalised difference vegetation index (NDVI) to relate biomass to altitude, rainfall and vegetation type. Each vegetation type in the area had a unique temporal signature and the climatic variables …
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The Role of Climatic and Environmental Variability on West Nile Virus in Harris County, Texas, 2006-2007
… study attempts to determine the extent to which climatic variability between the two years played a role. The Mosquito Control Division of Harris County Public Health and Environmental Services gathered the data on vectors and reservoirs. Then using GIS, spatial analysis, and geostatistical tools …
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The relative importance of microclimate and land use to biodiversity
… At coarse resolutions and large spatial extents, climatic variables are often found to be important in determining the boundaries of species' ranges. However, several authors have postulated that variables such as land cover or species interactions are more important in determining where species …
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An analysis of long-term effects of climate change and socioeconomic activities on grassland productivity of inner Mongolia
… acquiring remotely sensed satellite imagery, climatic variations, and aggregated annual reports of the socio-economy of the IMAR in vegetation growing seasons for 15 years. The spatial and temporal dissimilarities of the raw observations prevented us from exploiting the potential of this …
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Relationships of piñon juniper woodland expansion and climate trends in the Walker Basin, Nevada
… of how the amount of change among climatic variables over time were relatedto densification of piñon juniper canopy.The Mann-Kendall test of trend is able to detect trends in time series stacks ofspectral vegetation indexes and discern between both large and small magnitude …
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Geographic variation in the phenotypes of two sibling horseshoe bats Rhinolophus simulator and R.swinnyi
… linear mixed-effects models were used to regress climatic variables against echolocation call signals (Chapter 4) based on two hypotheses, the Sensory Drive and the James' Rule as a guide. The Lande's model (Chapter 2 and 3) showed that drift had a minimal effect to the variation of body …
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The effects of data aggregation on econometric estimates of climate change impact on corn and soybean production in the Midwest
… of the relationship between yields and key climatic variables can provide estimates of impact of climate change on yields. Then, acreage response equations are a reasonable alternative for modeling adjustments in regional land allocation in response to changing yield expectations.
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Time series modelling of groundwater levels in a selected semi-arid catchment within Vhembe District Municipality, South Africa
… Integrated Moving Average with eXogenous variables (SARIMAX) model were used to model the interaction between groundwater levels, temperature, wind speed, evaporation, and rainfall. The unpredictable occurrence of rainfall and other weather conditions in semi-arid and arid regions has …
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Lyme Disease and Forest Fragmentation in the Peridomestic Environment
… Lyme disease primarily focus on landscape and climatic variables. The disease depends highly on the survival of the tick vector, and white-footed mouse, the primary reservoir. Both depend on the existence of forest-herbaceous edge-habitats, as well as warm summer temperatures, mild winter lows, …
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Early Life History Stage Dynamics Across the Elevational Ranges of Andean Trees
… changing temperatures, precipitation, and other climatic variables. Accurately predicting how species distributions may shift with climate change requires an understanding of what controls species ranges that extends beyond correlations between species occurrences and abiotic factors. For species …
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Epidemic cholera in KwaZulu-Natal : the role of the natural and social environment
… in KZN; on the basis of its uniqueness in climatic conditions as compared to other areas of the Republic of South Africa (RSA). The other socio-economical and demographic factors were considered as factors that enhance the spread of the disease. As such, the exploration of the Cholera …
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Variations in albedo among natural and disturbed South Western Cape veld types
… types and floristic and soil data as well as climatic variables were measured. Disturbed veld types were found to have significantly higher albedos than natural veld types. The net loss of radiation may have significant climatic implications, which are discussed.
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Predicción de consumos eléctricos en Inglaterra, Gales y Escocia a través de datos de medidores inteligentes
… of London, Wales and Scotland, determining which climatic variables or weekdays or holidays determine the changes in consumption in the population. With the new European regulation that forces energy suppliers to deploy smart meters in all homes, usable information can be obtained when predicting …
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Geospatial and statistical foundations for streamflow synthesis in West Virginia
… (PCA) was used to derive a set of master variables that characterize stream flow in West Virginia based on historical data from 29 watersheds. The relationships between variables affecting stream flow were also analyzed using cluster and correlation analysis to derive an optimum set of …
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DEFINING POSTMORTEM CHANGES IN WESTERN MONTANA: A LONGITUDINAL STUDY OF THE RATE AND SEQUENCE OF SURFACE AND BURIAL DECOMPOSITION
… Throughout a nine-month period the following variables were monitored for the surface pig: rate and pattern of decomposition, climatic variables, internal temperature, and entomological activity. The following variables were monitored for the buried pig: ambient temperature, internal …
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DEFINING POSTMORTEM CHANGES IN WESTERN MONTANA: A LONGITUDINAL STUDY OF THE RATE AND SEQUENCE OF SURFACE AND BURIAL DECOMPOSITION
… Throughout a nine-month period the following variables were monitored for the surface pig: rate and pattern of decomposition, climatic variables, internal temperature, and entomological activity. The following variables were monitored for the buried pig: ambient temperature, internal …
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An economic analysis of the agricultural development potential for Southern Honduras
… of selected crops on typical production function variables only. Model II regressed yields on typical production variables together with soil and climatic variables. Throughout the study the minimum error variance criterion was used to determine the variables to be included in the estimating …
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Estimation of evaporation losses based on stable isotope composition of water in the Calueque-Oshakati canal, Namibia
… data was inserted in a hydro-calculator with climatic variables to compute the evaporation factors. The findings of the research showed that higher amounts of water are lost due to evaporation during the dry season than the wet season. This paper finally recommends the change of the method of …
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