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 11 of 11 for “"seasonal shift"”.
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Temporal Changes in Surface Water Availability: Patterns of Seasonal Shift on Water Stress in the Conterminous US Under a Changing Climate
… water stress across the CONUS by climate region, seasonally, for each watershed. We used the widely deployed Water Supply Stress Index (WaSSI) to analyze the CONUS at the Hydrologic Unit Code eight (HUC8) scale. The aim of this work was to determine if there would be a significant change in trend …
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Home Range, Activity Period, Burrow Use, and Body Temperatures of the Nine-Banded Armadillo (Dasypus Novemcinctus) on the Northern Edge of Its Range
… found in the same burrow. During the winter a shift in activity from nocturnal to diurnal behavior was observed. There was a strong correlation between the seasonal shift in activity and temperature. The armadillos in this study maintained a constant body temperature of approximately 35°C over …
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THE IMPACT OF MICROCLIMATE ON BRANCH COLONIZATION BY NEOTROPICAL CERAMBYCID BEETLES
… branches at ground level in the dry season, but shifted to canopy level in the rainy season. The current beetle-rearing study was conducted to confirm the occurrence of this seasonal shift, explore possible causes, and to determine if similar microclimate conditions occurred at ground level in …
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Investigations into some important fish larvae in the south east Atlantic in relation to the hydrological environment
… covered in the study: (i) the description of the seasonal hydrological changes in the survey area and a comparison between years. (ii) an examination of the seasonal distribution and abundance of the larval stages in relation to hydrological conditions. (iii) the determination of the preferential …
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Precipitation amount, altitude, and moisture trajectory effects on the stable isotopic composition of precipitation in the Galapagos Islands
… samples. We also find a lack of a predictable seasonal shift in moisture sources which explains the very small seasonal variation in δ18Op. Daily δ18Op near sea level was significantly correlated with precipitation amount, as was monthly, amount-weighted δ18Op and precipitation at sea level and …
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The trophic dynamics of the broadnose sevengill shark (Notorynchus cepedianus) in False Bay, South Africa, using multiple tissue stable isotope analysis
… important prey groups. There was no apparent seasonal shift in the diet of sevengills, despite clear seasonal aggregation in coastal kelp forests during the summer months. δ15N decreased significantly with sevengill size, with immature females having higher δ15N values than mature females, …
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Seasonal Movements, Habitat Use Patterns and the Effects of Human Disturbances on Elk in Custer State Park, South Dakota
… cows differed annually and in fall (P <0.05). Seasonal home range sizes differed for bulls between fall and winter (P <0.05), fall and summer (P<0.05), spring and winter (P<0.05), and spring and summer (P<0.05). Seasonal home range size for cows differed between fall and winter (P<0.05), fall …
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A Combined Field And Laboratory Investigation Into The Transport Of Fecal Indicator Microorganisms Through A Shallow Drinking Water Aquifer In Bangladesh
… test results, a conceptual model to explain seasonal patterns of well contamination based on the hydraulic interaction of ponds and irrigation/drainage canals and a new understanding of the important role that such canals might play in predicting the microbial contamination of shallow …
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Weather extremes in a changing climate: analyses for extreme precipitation, severe hail, and tornadoes
… are used to examine past and potential future seasonal changes in extreme precipitation event frequency over the United States. Using the extreme precipitation index as a metric for extreme precipitation event frequency change, we find key differences between models and observations. In …
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Phytoplankton's role in the biological pump during the growth season across the Atlantic Southern Ocean
Southern Ocean phytoplankton growth is seasonally co-limited by light and iron availability. In winter, iron and macronutrients such as nitrate are supplied to surface waters during deep mixing events. Sea ice melt and increased solar radiation in spring drive rapid stratification of surface …
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Environmental change and soil organic carbon storage in a dust emission hotspot, Free State, South Africa
… The goal of this study was to establish how the shift in land cover or land use change affects the occurrence of dust and determine the climate constraints and mitigations to crop production with focus on the dustiest parts of South Africa in the Free State Moreover, the study wished to establish …