Spatial and temporal heterogeneity of water and nutrient pools is closely associated with the existence of different plant communities in hydrologically-controlled ecosystems such as the Everglades. These various communities differ in their flooding and fire tolerances as well as nutrient requirements. Upland plant communities are of particular ecological significance since they have high biodiversity and provide habitat to terrestrial fauna, yet comprise less than 10 % of the total area. Restoration and maintenance of such communities requires an understanding of their water and nutrient requirements. Chapter 2 compares water source utilization in hammocks and pine rocklands on the Miami Rock Ridge using stable isotopes of water. Hammocks do not flood, while adjacent pinelands may flood between 2-3 months. In the wet season, hammocks were found to use phosphorus (P) rich soilwater, a local pool of water and nutrients while pineland plants primarily relied upon groundwater, the regional pool. Access to a rich pool of P in the oligotrophic Everglades was associated with higher community-level foliar P concentration in hammocks. However in the dry season, hammocks utilized groundwater, which suggests sensitivity to extended droughts. Chapter 3 compares the hammock (upland or head) and swamp forests (lowland or tail) on tree islands in the Shark River Slough. Uplands were associated with P-rich soilwater uptake in the wet season, with regional water uptake in the dry season. Accordingly, tree island heads are rich in foliar P and thereby P-hotspots in the Everglades. Foliar nutrient concentrations can thus indicate limiting nutrient availability in the Everglades. Chapter 4 looks at how leaf phenology patterns are tied to water and nutrient pools. Leaf fall in ridge hammocks is associated with high foliar carbon isotope values over the dry season, which is not the case for tree island hammocks. However, in some species, high levels of foliar nitrogen are also associated with high foliar C13 values indicating stomatal limitation of photosynthesis. Growing season for most hammock species is the wet season coinciding with high availability of P, as reflected in high foliar P in this season. Linking water sources to foliar nutrients elucidates roles of water and nutrient pools in leading to different plant communities within an ecosystem.

Thesis (M. Ed. (Computer Assisted Education))--University of Pretoria, 1997. / Includes bibliographical references.

School climate is a determinant of academic performance, as supported by evidence in developed countries. However, there are limited studies from developing countries to test this hypothesis. The few studies that have attempted to explore this topic are often limited to educators. Studies in South Africa show this limitation, hence the motivation to explore school climate from the students' perspective. This study is focused on students' perception of school climate and how it impacts their academic lives. Two schools from the Western Cape Province were used as case studies. They were Pinelands and Langa High Schools, institutions that are distinct in terms of their history, location, resources, demographics and academic performance. The results of the study revealed that most students do not feel safe physically and emotionally in the school environment. In a multiracial school, the main concern is around interpersonal relationship, particularly the level of social support received from teachers; while in a black and disadvantaged school, the concerns are around institutional environment relating to the physical environment and facilities in school. Additionally, students from the privileged school had more emotional concerns, and did not believe that teachers supported them socially, while those from the disadvantaged school had physical safety concerns but believed that their teachers are supportive both academically and socially. The study concludes with a recommendation for future studies to consider more than two schools, expand the geographical scope, employ rigorous data collection, and assess multi-stakeholder perceptions of school climate and the link it has to academic performance so as to improve reliability and generalisability of the findings.

The Florida Everglades ecosystem is threatened by human development, increased pollution, freshwater scarcity, and invasive species; factors that have negatively impacted the Everglades and native species health and populations. Man-made canals and levies have redirected the natural flow of fresh water from Lake Okeechobee into the Florida Everglades, starving central and south Florida ecosystems of necessary fresh water and nutrients. Through the efforts of the Comprehensive Everglades Restoration Project (CERP), freshwater is being redirected back into central and south Florida, returning the sheet flow of water back into the Everglades. Monitoring species abundance in the Everglades is a beneficial conservational tool for assessing restoration efforts from CERP. As a semi-aquatic apex predator, river otters (Lontra canadensis) are a useful health bio-indicator for the Florida Everglades. In order to conduct future population studies of river otters in the Florida Everglades, it must first be ascertained where they can be found and what time of year they are most likely to be sighted. For this study, Moultrie infrared game cameras were used to photograph the presence or absence of river otters within the five main habitats in the Everglades; the pinelands, hardwood hammock, cypress swamp, marsh prairie, and mangrove estuary at two protected areas in the Florida Everglades (Big Cypress National Preserve and Fakahatchee Strand State Park). River otters were most frequently sighted in the hardwood hammock habitat, but were also found in the cypress swamp. The large majority of river otter sightings occurred during dry season, which is thought to be a function of restricted water availability and aquatic mobility. Future population studies of river otters would be most productive in the hardwood hammock and cypress swamp habitats during dry season. Game camera images along with field opportunistic sightings, resulted in a variety of species documented. This provided valuable information of species richness and distribution within and amongst the habitats. The hardwood hammock was found to be the most species rich habitat, having over half the species observed in the study in this habitat. The Aves class was the most abundantly observed in the Everglades, and was most frequently sighted during the dry season. As a refuge for migratory birds, the Everglades house the majority of bird species during the winter months, which occur during dry season. The Aves class was most frequently sighted in the pinelands habitat during dry season. This habitat, being the highest in elevation and therefore the driest, shows a stronger resemblance to most northern bird habitats then does the water-saturated wetlands found throughout the Everglades. The mangrove estuary was the most commonly occurring outlier, having the least species overlap when compared to the other habitats. All other habitats in the Everglades are freshwater wetlands, while the mangrove estuary is a brackish environment, which limits the species that are unable to tolerate saline conditions. Further studies of species abundance throughout the Everglades will aid in monitoring CERP restoration efforts over time.

The purpose of this research project was to determine an appropriate intervention to assist in bringing transformation to the poverty-stricken community of Langa, Cape Town, South Africa. Intense poverty is a fact of life for almost 3 billion people in the world, a figure which includes approximately 50 per cent of the South African population. The Bible gives clear instruction mandating care for ‘the poor’. Therefore, those claiming to follow the teaching of Scripture must make poverty alleviation a priority. Phambili ngeThemba began as an intervention in the Langa Township community to discover ways to engage with issues around poverty. Research facilitated by Learn to Earn, a non-profit organization offering skills training and job creation, was done to understand if individual and community development was necessary and, if so, how it could be structured as a method to alleviate poverty in the Langa Community. Both quantitative and qualitative research was undertaken. Through random proportionate sampling in a thorough needs analysis of the businesses in and around Langa, the ideal character qualities desired by local business for the workforce were elicited. These were traits that could be developed in unemployed people. Use of basic questionnaires and oral feedback by three selected focus groups comprised of Langa residents enabled evaluation of local human service resources and identification of the felt needs in the community. The Priority Index (P-Index) research technique distinguished between the actual needs of the community and their perceived needs or wants. The results became the training foundation for the Zanokhanyo Training and Resource Centre, providing holistic development for the unemployed to equip them for placement in the workforce. Copyright / Dissertation (MA(Theol))--University of Pretoria, 2010. / Practical Theology / unrestricted