An investigation commissioned by the National Union of Mineworkers
- NUM
- Authors: NUM
- Date: July 1985
- Subjects: NUM
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/134861 , vital:37212
- Description: The University of the Witwatersrand has a long established relationship with the mining industry. Indeed, its origins go back to the South African School of Mines established in Kimberley in 1896. (1). Since 1917, the Chamber of Mines has given direct grants to the University and its predecessors. In fact, the Chamber remains our largest private donor. Murray has shown in his authoritative study of the early years of the University that there have been occasions in our history when the Chamber has felt that it has not received a satisfactory return upon its massive investment in the University (2). On balance, however, the University can rightly claim to have served the Chamber well over the years. In recent years, the other side of the industry's history and social structure has been a focus of systematic investigation in this University. Here, van Onselen's Chibaro stands out : a pioneering attempt to create historically the social world of the compound in the early years of the mining industry in Southern Rhodesia. In our own Department, Moodie, Bozzoli, and Innes have all contributed to our knowledge of the social structure of mining.
- Full Text:
- Date Issued: July 1985
- Authors: NUM
- Date: July 1985
- Subjects: NUM
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/134861 , vital:37212
- Description: The University of the Witwatersrand has a long established relationship with the mining industry. Indeed, its origins go back to the South African School of Mines established in Kimberley in 1896. (1). Since 1917, the Chamber of Mines has given direct grants to the University and its predecessors. In fact, the Chamber remains our largest private donor. Murray has shown in his authoritative study of the early years of the University that there have been occasions in our history when the Chamber has felt that it has not received a satisfactory return upon its massive investment in the University (2). On balance, however, the University can rightly claim to have served the Chamber well over the years. In recent years, the other side of the industry's history and social structure has been a focus of systematic investigation in this University. Here, van Onselen's Chibaro stands out : a pioneering attempt to create historically the social world of the compound in the early years of the mining industry in Southern Rhodesia. In our own Department, Moodie, Bozzoli, and Innes have all contributed to our knowledge of the social structure of mining.
- Full Text:
- Date Issued: July 1985
Developing a citizen technician based approach to suspended sediment monitoring in the Tsitsa River catchment, Eastern Cape, South Africa
- Authors: Bannatyne, Laura Joan
- Date: 2018
- Subjects: Sediments (Geology) -- Management , Sediments (Geology) -- South Africa -- Eastern Cape , Watersheds -- South Africa -- Eastern Cape , Suspended sediments -- South Africa -- Eastern Cape , Suspended sediments -- Monitoring -- Citizen participation , Tsitsa River
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62593 , vital:28211
- Description: Suspended sediment (SS) in channels is spatiotemporally heterogeneous and, over the long term, is known to be moved predominantly by flood flows with return periods of ~1 - 1.5 years. Flood flows in the Tsitsa catchment (Eastern Cape Province, South Africa) are unpredictable, and display a wide range of discharges. Direct, flood-focused SS sampling at sub-catchment scale was required to provide a SS baseline against which to monitor the impact on SS of catchment rehabilitation interventions, to determine the relative contributions of sub-catchments to SS loads and yields at the site of the proposed Ntabelanga Dam wall, and to verify modelled SS baselines, loads and yields. Approaches to SS sampling relying on researcher presence and/or installed equipment to adequately monitor SS through flood flows were precluded by cost, and the physical and socioeconomic conditions in the project area. A citizen technician (CT)-based flood-focused approach to direct SS sampling was developed and implemented. It was assessed in terms of its efficiency and effectiveness, the proficiency of the laboratory analysis methods, and the accuracy of the resulting SS data. A basic laboratory protocol for SSC analysis was developed, but is not the focus of this thesis. Using basic sampling equipment and smartphone-based reporting protocols, local residents at eleven points on the Tsitsa River and its major tributaries were employed as CTs. They were paid to take water samples during daylight hours at sub-daily timestep, with the emphasis on sampling through flood flows. The method was innovative in that it opted for manual sampling against a global trend towards instrumentation. Whilst the management of CTs formed a significant project component, the CTs benefitted directly through remuneration and work experience opportunities. The sampling method was evaluated at four sites from December 2015 - May 2016. The CTs were found to have efficiently and effectively sampled SS through a range of water levels, particularly in the main Tsitsa channel. An acceptable level of proficiency and accuracy was achieved, and many flood events were successfully defined by multiple data points. The method was chiefly limited by the inability of CTs to sample overnight rises and peaks occurring as a result of afternoon thunderstorms, particularly in small tributaries. The laboratory process was responsible for some losses in proficiency and accuracy. Improved laboratory quality control was therefore recommended. The CT-based approach can be adapted to other spatial and temporal scales in other areas, and to other environmental monitoring applications.
- Full Text:
- Date Issued: 2018
- Authors: Bannatyne, Laura Joan
- Date: 2018
- Subjects: Sediments (Geology) -- Management , Sediments (Geology) -- South Africa -- Eastern Cape , Watersheds -- South Africa -- Eastern Cape , Suspended sediments -- South Africa -- Eastern Cape , Suspended sediments -- Monitoring -- Citizen participation , Tsitsa River
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62593 , vital:28211
- Description: Suspended sediment (SS) in channels is spatiotemporally heterogeneous and, over the long term, is known to be moved predominantly by flood flows with return periods of ~1 - 1.5 years. Flood flows in the Tsitsa catchment (Eastern Cape Province, South Africa) are unpredictable, and display a wide range of discharges. Direct, flood-focused SS sampling at sub-catchment scale was required to provide a SS baseline against which to monitor the impact on SS of catchment rehabilitation interventions, to determine the relative contributions of sub-catchments to SS loads and yields at the site of the proposed Ntabelanga Dam wall, and to verify modelled SS baselines, loads and yields. Approaches to SS sampling relying on researcher presence and/or installed equipment to adequately monitor SS through flood flows were precluded by cost, and the physical and socioeconomic conditions in the project area. A citizen technician (CT)-based flood-focused approach to direct SS sampling was developed and implemented. It was assessed in terms of its efficiency and effectiveness, the proficiency of the laboratory analysis methods, and the accuracy of the resulting SS data. A basic laboratory protocol for SSC analysis was developed, but is not the focus of this thesis. Using basic sampling equipment and smartphone-based reporting protocols, local residents at eleven points on the Tsitsa River and its major tributaries were employed as CTs. They were paid to take water samples during daylight hours at sub-daily timestep, with the emphasis on sampling through flood flows. The method was innovative in that it opted for manual sampling against a global trend towards instrumentation. Whilst the management of CTs formed a significant project component, the CTs benefitted directly through remuneration and work experience opportunities. The sampling method was evaluated at four sites from December 2015 - May 2016. The CTs were found to have efficiently and effectively sampled SS through a range of water levels, particularly in the main Tsitsa channel. An acceptable level of proficiency and accuracy was achieved, and many flood events were successfully defined by multiple data points. The method was chiefly limited by the inability of CTs to sample overnight rises and peaks occurring as a result of afternoon thunderstorms, particularly in small tributaries. The laboratory process was responsible for some losses in proficiency and accuracy. Improved laboratory quality control was therefore recommended. The CT-based approach can be adapted to other spatial and temporal scales in other areas, and to other environmental monitoring applications.
- Full Text:
- Date Issued: 2018
The changing face of Rhodes University: exploring aspects of visuality, sexuality and protest between the apartheid and postapartheid periods
- Authors: Stein, Jonathan Harry
- Date: 2018
- Subjects: Rhodes University , Apartheid South Africa , Post-apartheid era South Africa , College students Attitudes , Student movements South Africa , Decolonization South Africa , Aesthetics Political aspects South Africa , Sex Political aspects South Africa
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/60530 , vital:27790
- Description: This thesis seeks to provide an historical overview of changing trends within specific spheres of the institutional and student culture of Rhodes University between the apartheid and post-apartheid periods. In particular, this thesis seeks to examine changes and developments within the visual and aesthetic culture of the university, and within the sphere of sexual norms and relations within the Rhodes student community. The historical dimensions of these two spheres of the university’s culture will be explored in light of the #RhodesMustFall protest of 2015 and the #RUReferenceList protest of 2016, which drew attention to a perceived lack of institutional transformation related to these two areas.
- Full Text:
- Date Issued: 2018
- Authors: Stein, Jonathan Harry
- Date: 2018
- Subjects: Rhodes University , Apartheid South Africa , Post-apartheid era South Africa , College students Attitudes , Student movements South Africa , Decolonization South Africa , Aesthetics Political aspects South Africa , Sex Political aspects South Africa
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/60530 , vital:27790
- Description: This thesis seeks to provide an historical overview of changing trends within specific spheres of the institutional and student culture of Rhodes University between the apartheid and post-apartheid periods. In particular, this thesis seeks to examine changes and developments within the visual and aesthetic culture of the university, and within the sphere of sexual norms and relations within the Rhodes student community. The historical dimensions of these two spheres of the university’s culture will be explored in light of the #RhodesMustFall protest of 2015 and the #RUReferenceList protest of 2016, which drew attention to a perceived lack of institutional transformation related to these two areas.
- Full Text:
- Date Issued: 2018
The teaching practice component of initial teacher education: a social justice approach
- Authors: Long, Kelly Ann
- Date: 2018
- Subjects: Educational change -- South Africa , Teachers -- Training of -- South Africa , Education -- South Africa -- History , Education – South Africa -- Evaluation , Education -- Standards -- South Africa , Teacher effectiveness -- South Africa , Social justice and education , Education -- Study and teaching (Higher) -- South Africa
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/60200 , vital:27746
- Description: Research asserts that learner performance in South African schools is in a state of crisis. While many more learners’ post-1994 in South Africa have physical access to education, very few have epistemological access. The quality of the education learners receive is polarised along socio economic lines. This crisis has its roots in the legacy of colonialism and apartheid, and as such, there is a need to transform the education system to ensure equal opportunity for all learners, and ultimately economic growth and security for the country. One of the explanations offered for the crisis in learner performance is the poor teacher education system. However, there is a paucity of research in teacher education generally in South Africa, and specifically in relation to pre-service teachers. Furthermore, little attention has been given to how initial teacher education could contribute to the promotion of a social justice agenda with the intention of transforming the South African schooling system. This research seeks to understand how the expectations, scaffolding and assessment of preservice teachers’ teaching practices can be utilised to promote social justice during the Teaching Practice (TP) component of initial teacher education. In answering the research question, I analyse data and literature to identify a set of key valued functionings of quality praxis that preservice teachers ought to be provided the capability to realise, at the level of achieved functioning. This is a qualitative case study located in the interpretive paradigm. The case under study is: quality teaching practices of pre-service teachers. This case is bound by context (initial teacher education in South Africa) and setting (the pre-service teacher in the classroom). Two South African Higher Education Institutions (HEIs) were selected through purposive sampling and their respective Teaching Practice (TP) documentation was analysed. Focus group interviews were conducted with five lecturers involved in TP at one of the HEIs. The theoretical framework of the study used to guide the analysis of the data was underpinned by a social justice perspective on quality education. Given that a social justice perspective does not have analytic tools, I view quality pre-service teachers’ teaching practices as praxis and utilise the capability approach as a mechanism for identification and description of valued functionings and capabilities that contribute to quality praxis. There are four significant findings in my research. Firstly, there is consistency with regards to the valued functionings and capabilities across the TP documentation of the two participating HEIs. In other words, the conceptions of a capable pre-service teacher are similar. Secondly, if social justice goals are to be realised, greater clarity of the valued functionings needs to be evident in the TP documentation. Thirdly, the valued functionings can be categorised into those that are foundational and those that promote a social justice agenda. Finally, in promoting a social justice agenda, there are functionings that ought to be valued by the HEIs that are seemingly not currently valued.
- Full Text:
- Date Issued: 2018
- Authors: Long, Kelly Ann
- Date: 2018
- Subjects: Educational change -- South Africa , Teachers -- Training of -- South Africa , Education -- South Africa -- History , Education – South Africa -- Evaluation , Education -- Standards -- South Africa , Teacher effectiveness -- South Africa , Social justice and education , Education -- Study and teaching (Higher) -- South Africa
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/60200 , vital:27746
- Description: Research asserts that learner performance in South African schools is in a state of crisis. While many more learners’ post-1994 in South Africa have physical access to education, very few have epistemological access. The quality of the education learners receive is polarised along socio economic lines. This crisis has its roots in the legacy of colonialism and apartheid, and as such, there is a need to transform the education system to ensure equal opportunity for all learners, and ultimately economic growth and security for the country. One of the explanations offered for the crisis in learner performance is the poor teacher education system. However, there is a paucity of research in teacher education generally in South Africa, and specifically in relation to pre-service teachers. Furthermore, little attention has been given to how initial teacher education could contribute to the promotion of a social justice agenda with the intention of transforming the South African schooling system. This research seeks to understand how the expectations, scaffolding and assessment of preservice teachers’ teaching practices can be utilised to promote social justice during the Teaching Practice (TP) component of initial teacher education. In answering the research question, I analyse data and literature to identify a set of key valued functionings of quality praxis that preservice teachers ought to be provided the capability to realise, at the level of achieved functioning. This is a qualitative case study located in the interpretive paradigm. The case under study is: quality teaching practices of pre-service teachers. This case is bound by context (initial teacher education in South Africa) and setting (the pre-service teacher in the classroom). Two South African Higher Education Institutions (HEIs) were selected through purposive sampling and their respective Teaching Practice (TP) documentation was analysed. Focus group interviews were conducted with five lecturers involved in TP at one of the HEIs. The theoretical framework of the study used to guide the analysis of the data was underpinned by a social justice perspective on quality education. Given that a social justice perspective does not have analytic tools, I view quality pre-service teachers’ teaching practices as praxis and utilise the capability approach as a mechanism for identification and description of valued functionings and capabilities that contribute to quality praxis. There are four significant findings in my research. Firstly, there is consistency with regards to the valued functionings and capabilities across the TP documentation of the two participating HEIs. In other words, the conceptions of a capable pre-service teacher are similar. Secondly, if social justice goals are to be realised, greater clarity of the valued functionings needs to be evident in the TP documentation. Thirdly, the valued functionings can be categorised into those that are foundational and those that promote a social justice agenda. Finally, in promoting a social justice agenda, there are functionings that ought to be valued by the HEIs that are seemingly not currently valued.
- Full Text:
- Date Issued: 2018
How do urban dwellers identify with features within urban green spaces in the Eastern Cape?
- Authors: Manyani, Amanda
- Date: 2019
- Subjects: Land use, Urban -- South Africa , Greenbelts -- South Africa , City planning -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/95596 , vital:31174
- Description: Public urban green spaces contain natural and artificial features which play crucial roles in supporting urban social-ecological systems, a fact now recognized globally. The various natural and artificial features contained in public urban green spaces are said to be key contributors to the quality of life and well-being of urban dwellers. Nevertheless, this has been largely ignored in urban design in South Africa, especially in the poorer township and Reconstruction Development Program (RDP) areas. At the individual household and community levels within the poorer communities, the provision of green spaces and trees, as well as recreation facilities, is well below world standards, and much less than what is available in the more affluent areas of South African towns. Additionally, most research on the links between nature and human well-being in urban contexts comes from developed world contexts which adopt a westernized view of the relationship. Yet, in many societies of the Global South, including South Africa, worldviews and experiences of nature in green spaces and use of other recreational features takes on different meanings to those of the Global North. To show these differences, a combination of methods was used in this study, different types of green spaces were assessed and evaluated by structured observations so as to record the features present within the spaces. A survey of 360 households was conducted by targeting green space users and households within 100 metres from a green space. Results indicated that, across all the green space types, formal green spaces had a low cover of shrubs, trees and herbs whilst having high lawn cover. Furthermore, vegetation had poor rating across all the green spaces since the vegetation was either overgrown herbs, dense thickets of shrubs and mostly alien trees that were either diseased or forked. Similar to the disparity in the composition and structure of vegetation within the green spaces, there was a wide variability in the composition of recreational features and amenities across the green spaces. The formal green spaces had the most amenities like play equipment, shelter and seating. Informal green spaces and commonages had little or no recreational features available. The attributes of these spaces therefore influenced the reasons for visiting as more than 90 % of the respondents simply used the spaces for transit. With regards to attitudes and preferences towards particular features, they were emerging sense of strong negative feelings towards natural features. Most respondents emphasized the need for green spaces that are well laid out with maintained lawns, recreational facilities and open vegetation. Thus, the current design and available features within the studied urban green spaces do not meet local needs and aspirations and thus do not contribute to better well-being and quality of life as much as they could. Specifically, the various health benefits linked with being in contact with nature in the public green spaces were not evident in this study. The South African specific context in green space use, perception and people’s preferences is thus crucial for urban planning and sustainability.
- Full Text:
- Date Issued: 2019
- Authors: Manyani, Amanda
- Date: 2019
- Subjects: Land use, Urban -- South Africa , Greenbelts -- South Africa , City planning -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/95596 , vital:31174
- Description: Public urban green spaces contain natural and artificial features which play crucial roles in supporting urban social-ecological systems, a fact now recognized globally. The various natural and artificial features contained in public urban green spaces are said to be key contributors to the quality of life and well-being of urban dwellers. Nevertheless, this has been largely ignored in urban design in South Africa, especially in the poorer township and Reconstruction Development Program (RDP) areas. At the individual household and community levels within the poorer communities, the provision of green spaces and trees, as well as recreation facilities, is well below world standards, and much less than what is available in the more affluent areas of South African towns. Additionally, most research on the links between nature and human well-being in urban contexts comes from developed world contexts which adopt a westernized view of the relationship. Yet, in many societies of the Global South, including South Africa, worldviews and experiences of nature in green spaces and use of other recreational features takes on different meanings to those of the Global North. To show these differences, a combination of methods was used in this study, different types of green spaces were assessed and evaluated by structured observations so as to record the features present within the spaces. A survey of 360 households was conducted by targeting green space users and households within 100 metres from a green space. Results indicated that, across all the green space types, formal green spaces had a low cover of shrubs, trees and herbs whilst having high lawn cover. Furthermore, vegetation had poor rating across all the green spaces since the vegetation was either overgrown herbs, dense thickets of shrubs and mostly alien trees that were either diseased or forked. Similar to the disparity in the composition and structure of vegetation within the green spaces, there was a wide variability in the composition of recreational features and amenities across the green spaces. The formal green spaces had the most amenities like play equipment, shelter and seating. Informal green spaces and commonages had little or no recreational features available. The attributes of these spaces therefore influenced the reasons for visiting as more than 90 % of the respondents simply used the spaces for transit. With regards to attitudes and preferences towards particular features, they were emerging sense of strong negative feelings towards natural features. Most respondents emphasized the need for green spaces that are well laid out with maintained lawns, recreational facilities and open vegetation. Thus, the current design and available features within the studied urban green spaces do not meet local needs and aspirations and thus do not contribute to better well-being and quality of life as much as they could. Specifically, the various health benefits linked with being in contact with nature in the public green spaces were not evident in this study. The South African specific context in green space use, perception and people’s preferences is thus crucial for urban planning and sustainability.
- Full Text:
- Date Issued: 2019
Post-release evaluation of Megamelus scutellaris Berg. (hemiptera: delphacidae): a biological control agent of water hyacinth Eichhornia crassipes (Mart.) Solms-Laub (Pontederiaceae) in South Africa
- Authors: Miller, Benjamin Erich
- Date: 2019
- Subjects: Megamelus scutellaris Berg. , Delphacidae , Noxious weeds -- Biological control -- South Africa , Aquatic weeds -- Biological control -- South Africa , Water hyacinth -- Biological control -- South Africa , Biological pest control agents
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/92330 , vital:30710
- Description: Water hyacinth, Eichhornia crassipes (Mart.) Solms-Laub. (Pontederiaceae) is a free-floating aquatic macrophyte from South America that was introduced to South Africa in the 1900s for its attractive ornamental flowers. The plant was classified as a serious invader in the country in the 1970s, eventually becoming the worst invasive aquatic plant in South Africa. Biological control is widely regarded as the most effective method of managing water hyacinth, as it is ecologically safe, cost-effective, and self-sustaining. To date, nine biological control agents have been released in South Africa against water hyacinth, including eight arthropods and a pathogen. Due to the cumulative effects of highly eutrophic waterbodies, which mitigate the damage caused by biological control, and the cold winters which inhibit the rate of biological control agent population build up, South Africa currently has more biological control agents released on water hyacinth than anywhere else in the world. The need for a cold-tolerant agent that can reproduce and develop quickly, while still being damaging to water hyacinth in eutrophic systems, led to the introduction of the most recently released water hyacinth biological control agent, the planthopper Megamelus scutellaris Berg (Hemiptera: Delphacidae), which was initially collected from Argentina. This thesis formed the first post-release evaluation of M. scutellaris since its release in South Africa in 2013. It included a greenhouse experiment to measure the agent’s feeding damage in relation to different nutrient levels and stocking rates, as well as a field component to evaluate both the post-winter recovery of M. scutellaris, and a nationwide survey to measure the establishment of the agent around the country in relation to climate, water quality, and plant health. In the greenhouse experiment, the feeding damage was quantified using measurements of plant growth parameters and chlorophyll fluorometry. It was found that, like other biological control agents of water hyacinth, M. scutellaris was most damaging when released in high numbers on plants grown at medium nutrient levels, and less effective on plants grown at elevated nutrient levels. A water hyacinth infestation on the Kubusi River was selected for the evaluation of the post-winter recovery of M. scutellaris. The Kubusi River is both the first site where M. scutellaris was released, and the coldest site where water hyacinth biological control agents have established successfully in South Africa. Monthly visits tracking seasonal plant health characteristics and agent population densities indicated that the populations of M. scutellaris were impacted most significantly by the season. Low temperatures led to the water hyacinth plants being of poor quality during the winter, which had a subsequent negative effect on the agent populations. The agents could only fully recover by late summer, which meant that the plants were without any significant biological control through the initial phases of the growing season, when they were most vulnerable, and a significant lag-phase occurred between the recovery of the plants and the recovery of the agent population after the winter bottleneck. A survey of all sites where M. scutellaris had been released in South Africa yielded 16 sites where the agents had successfully established, having survived at least one full winter. Among these sites were four sites where the agents were found without them having been released, indicating that they can disperse unaided to new sites. The temperature was a major factor responsible for the success or failure of establishment, with very few agents surviving in the hot areas of South Africa or in areas with a high frost incidence. The density of M. scutellaris was higher in nutrient-rich water, and on plants with more leaves, suggesting that the quality of the plants also contributed to establishment. The results of this thesis showed that M. scutellaris is able to establish successfully in South Africa, and that the agents are capable of causing significant damage to water hyacinth, making it a promising addition to the biological control programme. Novel methods of measuring subtle insect feeding damage in plants and quantifying agent populations are also discussed, along with suggestions for the future implementation of M. scutellaris in South Africa.
- Full Text:
- Date Issued: 2019
- Authors: Miller, Benjamin Erich
- Date: 2019
- Subjects: Megamelus scutellaris Berg. , Delphacidae , Noxious weeds -- Biological control -- South Africa , Aquatic weeds -- Biological control -- South Africa , Water hyacinth -- Biological control -- South Africa , Biological pest control agents
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/92330 , vital:30710
- Description: Water hyacinth, Eichhornia crassipes (Mart.) Solms-Laub. (Pontederiaceae) is a free-floating aquatic macrophyte from South America that was introduced to South Africa in the 1900s for its attractive ornamental flowers. The plant was classified as a serious invader in the country in the 1970s, eventually becoming the worst invasive aquatic plant in South Africa. Biological control is widely regarded as the most effective method of managing water hyacinth, as it is ecologically safe, cost-effective, and self-sustaining. To date, nine biological control agents have been released in South Africa against water hyacinth, including eight arthropods and a pathogen. Due to the cumulative effects of highly eutrophic waterbodies, which mitigate the damage caused by biological control, and the cold winters which inhibit the rate of biological control agent population build up, South Africa currently has more biological control agents released on water hyacinth than anywhere else in the world. The need for a cold-tolerant agent that can reproduce and develop quickly, while still being damaging to water hyacinth in eutrophic systems, led to the introduction of the most recently released water hyacinth biological control agent, the planthopper Megamelus scutellaris Berg (Hemiptera: Delphacidae), which was initially collected from Argentina. This thesis formed the first post-release evaluation of M. scutellaris since its release in South Africa in 2013. It included a greenhouse experiment to measure the agent’s feeding damage in relation to different nutrient levels and stocking rates, as well as a field component to evaluate both the post-winter recovery of M. scutellaris, and a nationwide survey to measure the establishment of the agent around the country in relation to climate, water quality, and plant health. In the greenhouse experiment, the feeding damage was quantified using measurements of plant growth parameters and chlorophyll fluorometry. It was found that, like other biological control agents of water hyacinth, M. scutellaris was most damaging when released in high numbers on plants grown at medium nutrient levels, and less effective on plants grown at elevated nutrient levels. A water hyacinth infestation on the Kubusi River was selected for the evaluation of the post-winter recovery of M. scutellaris. The Kubusi River is both the first site where M. scutellaris was released, and the coldest site where water hyacinth biological control agents have established successfully in South Africa. Monthly visits tracking seasonal plant health characteristics and agent population densities indicated that the populations of M. scutellaris were impacted most significantly by the season. Low temperatures led to the water hyacinth plants being of poor quality during the winter, which had a subsequent negative effect on the agent populations. The agents could only fully recover by late summer, which meant that the plants were without any significant biological control through the initial phases of the growing season, when they were most vulnerable, and a significant lag-phase occurred between the recovery of the plants and the recovery of the agent population after the winter bottleneck. A survey of all sites where M. scutellaris had been released in South Africa yielded 16 sites where the agents had successfully established, having survived at least one full winter. Among these sites were four sites where the agents were found without them having been released, indicating that they can disperse unaided to new sites. The temperature was a major factor responsible for the success or failure of establishment, with very few agents surviving in the hot areas of South Africa or in areas with a high frost incidence. The density of M. scutellaris was higher in nutrient-rich water, and on plants with more leaves, suggesting that the quality of the plants also contributed to establishment. The results of this thesis showed that M. scutellaris is able to establish successfully in South Africa, and that the agents are capable of causing significant damage to water hyacinth, making it a promising addition to the biological control programme. Novel methods of measuring subtle insect feeding damage in plants and quantifying agent populations are also discussed, along with suggestions for the future implementation of M. scutellaris in South Africa.
- Full Text:
- Date Issued: 2019
Repatriating Xhosa music recordings archived at the International Library of African Music (ILAM) and reviving interest in traditional Xhosa music among the youth in Grahamstown
- Authors: Madiba, Elijah Moleseng
- Date: 2019
- Subjects: International Library of African Music , Xhosa (African people) -- Music , Sound recordings in ethnomusicology -- South Africa , Ethnomusicology -- South Africa -- Makhanda , Cultural property -- Repatriation -- South Africa -- Makhanda , Rap musicians -- South Africa -- Makhanda
- Language: English
- Type: text , Thesis , Masters , MMus
- Identifier: http://hdl.handle.net/10962/76599 , vital:30611
- Description: This research looks at the feasibility of using repatriation as a tool for the revitalisation of indigenous music within a contemporary South African musical context. Using tracks from the International Library of African Music (ILAM), this investigation presents isiXhosa traditional and indigenous music to a group of musicians from a hip-hop background that would never have had access to this type of music before. The thesis then traces their creative use of the music within their own genres. Speaking to the legacy of the Hugh Tracey collection at ILAM and criticisms that have surfaced, this research also attempts to validate the efforts made by Hugh Tracey in collecting and documenting African music. Themes ranging from understanding the term “tradition” are addressed, as well as other technical terms in the vernacular while also exploring and analysing the results of the repatriation project. Practical issues regarding the sampling of indigenous music were interrogated carefully due to the fact that the complexity of African music was foreign to most of the participants. Their familiarity with the music, or lack thereof, either motivated or ended the musicians’ participation in the research project. An in-depth analysis of the results of the musicians’ interaction with the music is presented where this study finds, at the heart of this research, that the musicians performed as agents who easily took to revitalising the music.
- Full Text:
- Date Issued: 2019
- Authors: Madiba, Elijah Moleseng
- Date: 2019
- Subjects: International Library of African Music , Xhosa (African people) -- Music , Sound recordings in ethnomusicology -- South Africa , Ethnomusicology -- South Africa -- Makhanda , Cultural property -- Repatriation -- South Africa -- Makhanda , Rap musicians -- South Africa -- Makhanda
- Language: English
- Type: text , Thesis , Masters , MMus
- Identifier: http://hdl.handle.net/10962/76599 , vital:30611
- Description: This research looks at the feasibility of using repatriation as a tool for the revitalisation of indigenous music within a contemporary South African musical context. Using tracks from the International Library of African Music (ILAM), this investigation presents isiXhosa traditional and indigenous music to a group of musicians from a hip-hop background that would never have had access to this type of music before. The thesis then traces their creative use of the music within their own genres. Speaking to the legacy of the Hugh Tracey collection at ILAM and criticisms that have surfaced, this research also attempts to validate the efforts made by Hugh Tracey in collecting and documenting African music. Themes ranging from understanding the term “tradition” are addressed, as well as other technical terms in the vernacular while also exploring and analysing the results of the repatriation project. Practical issues regarding the sampling of indigenous music were interrogated carefully due to the fact that the complexity of African music was foreign to most of the participants. Their familiarity with the music, or lack thereof, either motivated or ended the musicians’ participation in the research project. An in-depth analysis of the results of the musicians’ interaction with the music is presented where this study finds, at the heart of this research, that the musicians performed as agents who easily took to revitalising the music.
- Full Text:
- Date Issued: 2019
Shifting white SADF veteran identities from apartheid to contemporary South Africa
- Authors: Weich, Francois
- Date: 2019
- Subjects: South Africa -- History -- 1961-1994 , Angola -- History -- South African Incursions, 1978-1990 -- Veterans , South Africa -- History, Military -- 1961- , Veterans -- South Africa -- Personal narratives , South Africa -- Armed forces , South Africa -- Politics and government -- 1961-1978 , South Africa -- Politics and government -- 1978-1989 , South Africa. South African Defence Force
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/76106 , vital:30504
- Description: The ideologies and structures of the apartheid state have received extensive academic attention, but the legacies of the militarisation of white South African men – a group that exists at a unique intersection of apartheid privilege and exploitation – have not been sufficiently addressed. Even as beneficiaries of apartheid, white men were militarised through structures of coercion and the mobilisation of identity constructions that resulted in the widespread submission to conscription and support for apartheid militarism. This thesis explores the relationship between those militarised identities and the historical processes of apartheid through a consideration of a broad range of white SADF veteran narratives from the Missing Voices Oral History Project archive. This consideration of the role of identity mobilisation in apartheid can shed light on the effect of historical processes of militarisation on white men in South Africa, as well as address the persistence of values and behaviours that may present barriers to the social transformation of South Africa towards a true constitutional democracy. The thesis explores identity in SADF veteran narratives through the application of social constructionism in order to determine the effect of coercive structures and identity mobilisation on individuals, and to gauge the persistence militarised identities after the social and political structures underpinning them had become defunct. The identity content of the narratives is contextualised in relation to structures of coercion employed by the apartheid state and the SADF alongside a consideration of the effect of political transition on veterans. The legacy of the historical environment and the impact of political transition on SADF veterans’ constructed identities is investigated in relation to these veterans’ own visions of their roles in post-apartheid South Africa. Therefore, this thesis endeavours to contribute to the expansion of the field of historical and identity study by considering the construction and renegotiation of military identities that maintained, benefited from, and were exploited by the apartheid state.
- Full Text:
- Date Issued: 2019
- Authors: Weich, Francois
- Date: 2019
- Subjects: South Africa -- History -- 1961-1994 , Angola -- History -- South African Incursions, 1978-1990 -- Veterans , South Africa -- History, Military -- 1961- , Veterans -- South Africa -- Personal narratives , South Africa -- Armed forces , South Africa -- Politics and government -- 1961-1978 , South Africa -- Politics and government -- 1978-1989 , South Africa. South African Defence Force
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/76106 , vital:30504
- Description: The ideologies and structures of the apartheid state have received extensive academic attention, but the legacies of the militarisation of white South African men – a group that exists at a unique intersection of apartheid privilege and exploitation – have not been sufficiently addressed. Even as beneficiaries of apartheid, white men were militarised through structures of coercion and the mobilisation of identity constructions that resulted in the widespread submission to conscription and support for apartheid militarism. This thesis explores the relationship between those militarised identities and the historical processes of apartheid through a consideration of a broad range of white SADF veteran narratives from the Missing Voices Oral History Project archive. This consideration of the role of identity mobilisation in apartheid can shed light on the effect of historical processes of militarisation on white men in South Africa, as well as address the persistence of values and behaviours that may present barriers to the social transformation of South Africa towards a true constitutional democracy. The thesis explores identity in SADF veteran narratives through the application of social constructionism in order to determine the effect of coercive structures and identity mobilisation on individuals, and to gauge the persistence militarised identities after the social and political structures underpinning them had become defunct. The identity content of the narratives is contextualised in relation to structures of coercion employed by the apartheid state and the SADF alongside a consideration of the effect of political transition on veterans. The legacy of the historical environment and the impact of political transition on SADF veterans’ constructed identities is investigated in relation to these veterans’ own visions of their roles in post-apartheid South Africa. Therefore, this thesis endeavours to contribute to the expansion of the field of historical and identity study by considering the construction and renegotiation of military identities that maintained, benefited from, and were exploited by the apartheid state.
- Full Text:
- Date Issued: 2019
The remote sensing of fires and their effects on soil properties in the uKhahlamba Drakensberg Park
- Authors: Moore, Natasha Jade
- Date: 2019
- Subjects: Remote sensing -- South Africa -- KwaZulu-Natal , Soil ecology -- South Africa -- KwaZulu-Natal , Grassland fires -- South Africa -- KwaZulu-Natal , Grassland fires -- Remote sensing -- South Africa -- KwaZulu-Natal , Soils -- Effect of fires on -- South Africa -- KwaZulu-Natal , uKhalamba Drakensberg Park (South Africa)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/94400 , vital:31042
- Description: Fires are a common and natural occurrence globally and specifically on the African continent. The Drakensberg Mountains are home to southern Africa’s high-altitude fire-climax grasslands, where fire is the dominant management tool. Fire is used to maintain the grasslands in the uKhahlamba Drakensberg Park (UDP) World Heritage Site, located on the eastern escarpment of the KwaZulu-Natal Drakensberg. This study aimed to investigate the spatial and temporal frequency of fires using remote sensing, and to investigate the effect of fire frequency on soil properties in the UDP. Remote sensing offers a set of supportive tools for the management of this sensitive vegetation and specifically to assess the frequency and spatial extent of fires. Field assessments can then be used to assess the impact of fires. Remotely sensed data were used to determine fire frequency and the spatial extent of fires in the UDP. The Moderate Resolution Imaging Spectroradiometer (MODIS) and Visible Infrared Imaging Radiometer Suite (VIIRS) active fire detection point data were processed to investigate the temporal resolution of fires. Landsat 5 and 8 imagery were utilised for conducting Normalised Burn Ratios (NBR) to determine the spatial extent of the burn scars of fires. The results from the remotely sensed data were used to select study sites for accessing the effects of fire frequency on soil properties. The remote sensing results showed the main fire season in the UDP was from May to October, and annual burn scars from the available Landsat data for 1998 to 2017 ranged from 22.5% to 57.67% of the UDP. Remote sensing was shown to be an effective tool for monitoring fires in the UDP, with a combination of satellite data producing the best results. Soil properties were highly varied across the UDP. Environmental factors were shown to have a more significant influence on soil properties than fire frequency. This study highlighted the complex nature and diversity of fires and soils across the UDP.
- Full Text:
- Date Issued: 2019
- Authors: Moore, Natasha Jade
- Date: 2019
- Subjects: Remote sensing -- South Africa -- KwaZulu-Natal , Soil ecology -- South Africa -- KwaZulu-Natal , Grassland fires -- South Africa -- KwaZulu-Natal , Grassland fires -- Remote sensing -- South Africa -- KwaZulu-Natal , Soils -- Effect of fires on -- South Africa -- KwaZulu-Natal , uKhalamba Drakensberg Park (South Africa)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/94400 , vital:31042
- Description: Fires are a common and natural occurrence globally and specifically on the African continent. The Drakensberg Mountains are home to southern Africa’s high-altitude fire-climax grasslands, where fire is the dominant management tool. Fire is used to maintain the grasslands in the uKhahlamba Drakensberg Park (UDP) World Heritage Site, located on the eastern escarpment of the KwaZulu-Natal Drakensberg. This study aimed to investigate the spatial and temporal frequency of fires using remote sensing, and to investigate the effect of fire frequency on soil properties in the UDP. Remote sensing offers a set of supportive tools for the management of this sensitive vegetation and specifically to assess the frequency and spatial extent of fires. Field assessments can then be used to assess the impact of fires. Remotely sensed data were used to determine fire frequency and the spatial extent of fires in the UDP. The Moderate Resolution Imaging Spectroradiometer (MODIS) and Visible Infrared Imaging Radiometer Suite (VIIRS) active fire detection point data were processed to investigate the temporal resolution of fires. Landsat 5 and 8 imagery were utilised for conducting Normalised Burn Ratios (NBR) to determine the spatial extent of the burn scars of fires. The results from the remotely sensed data were used to select study sites for accessing the effects of fire frequency on soil properties. The remote sensing results showed the main fire season in the UDP was from May to October, and annual burn scars from the available Landsat data for 1998 to 2017 ranged from 22.5% to 57.67% of the UDP. Remote sensing was shown to be an effective tool for monitoring fires in the UDP, with a combination of satellite data producing the best results. Soil properties were highly varied across the UDP. Environmental factors were shown to have a more significant influence on soil properties than fire frequency. This study highlighted the complex nature and diversity of fires and soils across the UDP.
- Full Text:
- Date Issued: 2019
- «
- ‹
- 1
- ›
- »