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 13 of 13 for “"rainfall seasonality"”.
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Exploring high-resolution carbon isotopes in archaeological charcoal as a rainfall seasonality proxy
Rainfall in present-day South Africa is distinctly seasonal, with a Summer Rainfall Zone (SRZ) in the east, a Winter Rainfall Zone (WRZ) in the west, and a Year-Round Rainfall Zone (YRZ) along the south coast and interior between them. Understanding shifts in these zones during Late Pleistocene …
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A population dynamics model for analysing the effect of rainfall seasonality on vegetation in the Karoo
… This paper investigates the effect of changing rainfall seasonality on certain important species of plants in the Cape Floristic Region. The species are selected from different biomes and I focus on two growth forms, namely reseeder and resprouter. Data from an experiment conducted between two …
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The effect of altered rainfall seasonality on post-fire recovery of Fynbos and Renosterveld shrublands in the Cape Floristic Region
… on investigating the relationships between rainfall seasonality patterns and post-fire vegetation processes in neighbouring Fynbos and Renosterveld shrubland communities within the mega-diverse Cape Floristic Region of South Africa. I investigated vegetation sensitivity to moisture …
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Changes in rainfall seasonality in the Western Cape, South Africa: an exploration of methods for determining the start and end of the rainfall season
… this thesis is to detect and analyse changes in seasonality in rainfall for various groups of weather stations in the Western Cape area. Weather stations with similar seasonal patterns are firstly grouped together using certain clustering algorithms. The start and end of the rainfall season dates …
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The influence of rainfall seasonality and climate change on the demography of Aloe Dichotoma, a long-lived succulent tree from semi-arid southern Africa
… its distribution are likely to be related to rainfall seasonality. This study investigated change in ten Aloe dichotoma populations within winter and summer rainfall zones in South Africa and southern Namibia. Using repeat photography over a timespan of approximately 30 years, demographic …
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The Direct and Indirect Effects of Insectivory by Birds in Two Neotropical Forests
… differed in age, tree species diversity and rainfall seasonality. Birds significantly reduced local arthropod densities in the canopy of a seasonally dry forest. Moreover, the taxonomic composition of arthropods changed in the absence of bird predation, with greater densities of chewing …
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The effects of environment and niche on the distributions of dwarf chameleons, present and future
… for B. pumilum, regression trees were employed. Rainfall seasonality and maximum annual temperatures were shown to strongly effect the current distributions of the genus Bradypodion at both the species and clade level. Additionally, as closely related species inhabited similar environmental …
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Determining the potential drivers of invasive C4 grasses at De Hoop Nature Reserve, South Africa
… shrubland distribution in SA is associated with rainfall seasonality. In grassland the vegetation is exclusively C4 while the shrub and tree component is generally C3. Shrublands, in contrast, are predominantly C3, for both woody and herbaceous species, though there can be a small C4 sedge and …
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Soil erosion and suspended sediment dynamics in intensive agricultural catchments
… sediment connectivity fluctuations resulted from rainfall seasonality, which in turn regulated the contrasting spatial and temporal extent of surface hydrological pathways. Increased transport occurred when and where sediment sources were available as a result of hillslope land use (low …
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Glacial-Interglacial Variability of Eastern Pacific Hydroclimate
… Modern hydroclimate in SWNA is complex as rainfall seasonality and moisture source ranges from the Mediterranean climate of California, bimodal desert southwest, monsoonal northwest Mexico, and Central American tropics, and there is a high degree of interannual rainfall variability due to …
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ASSESSING AND IMPROVING BIODIVERSITY OUTCOMES FOR TROPICAL FOREST RESTORATION
… lands for biodiversity is mediated by fire and rainfall seasonality. Although restoration can incorporate a range of strategies (e.g., active tree planting versus assisted or passive natural regeneration), my research focused on natural regeneration which is generally the most cost-effective and …
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Mechanisms of observed spatial heterogeneity in rainfall variability over the winter rainfall zone of South Africa
Renewed interest in South Africa's Winter Rainfall Zone (WRZ) has emerged in the wake of the 2015–2017 “Day Zero” drought and water crisis. However, this has yielded little insight into the spatial heterogeneity in WRZ climatological seasonality and rainfall variability or their drivers, despite …
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The role of humans, climate and vegetation in the complex fire regimes of north-east Namibia
… frequency, fire number and size, intensity, and seasonality), together with climate (El Niño Southern-Oscillation [ENSO] events; local rainfall patterns) and vegetation data in multiple use (inhabited) and core conservation areas, over a time period that covered a shift in policy from fire …