A mechanistic and trait-based approach to investigating macroinvertebrates distribution and exposure to microplastics in riverine systems
- Authors: Owowenu, Enahoro Kennedy
- Date: 2024-10-11
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/466666 , vital:76765 , DOI https://doi.org/10.21504/10962/466666
- Description: Microplastics in rivers pose an ecological risk. Hydraulic biotopes form distinct flow patches that vary longitudinally along the river, potentially influencing the transport dynamics of microplastics. Macroinvertebrates exhibit adaptations to different hydraulic biotopes through their unique traits. These traits can mediate their exposure to microplastics, thereby imposing selective pressures on these organisms. Different taxa often demonstrate preferences for specific hydraulic biotopes characterized by distinct flow regimes. Understanding the transport dynamics of microplastics mediated by hydraulic biotopes and the potential exposure of macroinvertebrates at the hydraulic biotope scale is important for determining the fate of riverine microplastics and detecting species at risk. Both empirical and theoretical studies have highlighted the interconnectedness of hydrology, geomorphology, and microplastic transport in rivers, yet, there remains a gap in understanding how a hydro-geomorphological approach could enhance the understanding of the microplastic transport process. Little is known about the role of traits in driving macroinvertebrate exposure to microplastics at a scale relevant to ecological dynamics. This study addressed these gaps by applying a hydro-geomorphological approach to investigate the distribution of microplastics at the hydraulic biotope scale and assessed the potential exposure of macroinvertebrates using a trait-based approach. This study also explored the relationship between microplastic abundance and selected water physicochemical properties, as well as the influence of adjacent land use types. By integrating these aspects the research provided a comprehensive understanding of microplastics dynamics in river systems, shedding light on both environmental factors shaping their distribution and the potential impacts on aquatic organisms. The study was conducted over the wet and dry seasons (October 2021 – July 2022) at 10 sites located in the upper, middle, and lower reaches of the Swartkops and Buffalo River systems in the Eastern Cape Province of South Africa. The hydraulic biotopes (i.e., pools, runs, riffles) were grouped into two conceptualised forms, namely, sink and flush hydraulic zones and were characterized by hydraulic indices such as the Froude number and the Reynolds number. The flush hydraulic zone represents hydraulic biotopes where microplastics can potentially be remobilized quickly into suspension, and the sink represents biotopes where microplastics can potentially accumulate and remobilisation is far slower. Fast-to-moderate flowing hydraulic biotopes were conceptualised as microplastics flush zones while slow-flowing to still biotopes as microplastic sink zones. Samples were collected at different depths in each hydraulic zone to quantify suspended and settled forms of microplastics. Microplastics targeted in this study ranged in size from 0.063 mm to less than 5 mm. Classification was achieved through microscopic observation, and confirmation via Fourier Transform Infrared Spectroscopy (FTIR-ATR) was conducted for samples ranging from 0.5 mm to less than 5 mm. At the site level, settled microplastics showed statistically significant spatial and temporal variations between the sites, and between the seasons (P < 0.05). The suspended microplastic varied only spatially. Fibres and fragments were the dominant microplastic shape, while polyethylene and polypropylene were the dominant microplastic polymers. Suspended microplastics showed statistically significant variation between urban land cover and other land cover categories (industrial, agricultural, rural, and natural land cover). Microplastics abundance was associated with high levels of turbidity, total suspended solids, total inorganic nitrogen, higher temperatures and increasing electrical conductivity. At the hydraulic biotope scale, the mean occurrence of suspended microplastics (1.76 ± 1.44 items/L; mean + SD) in the flush hydraulic zone was higher than that in the sink zone (1.54 ± 1.46 items/L), while settled microplastics were more abundant in the sink hydraulic zone (1.82 ± 1.98 items/L) than the flush hydraulic zone (1.32 ± 1.49 items/L). This observation was in line with the prediction in this study. The mean suspended and settled microplastics concentrations were higher during the wet season across the flush and sink hydraulic zones than in the dry season. Global multivariate analysis of variance (MANOVA) and two-way analysis of variance (ANOVA) revealed significant spatial and temporal variations in settled microplastics abundances between the flush and sink hydraulic zones. The results indicated that geomorphologically defined units such as riffles and moderate to fast runs (flush) generally contained lower amounts of settled microplastics compared to pools and backwaters (sink). However, this distinction between the flush and sink microplastic zones was observed only for settled microplastics and not for suspended microplastics. Suspended and settled microplastics showed a statistically significant relationship with the Froude number index. The generalised additive model indicated that settled microplastics abundance distribution decreased significantly with increasing Froude number value in the flush zone. Suspended microplastics decreased at low Froude number values and showed an increasing trend at higher Froude number values of about 0.75. The results indicate the usefulness of the hydraulic biotope scale microplastic monitoring approach in detecting microplastic hotspots and explaining variations in microplastics abundances driven by instream hydraulics. Four traits and ecological preferences of macroinvertebrates including body size, gill type, feeding habit, and velocity preferences were selected and resolved into 17 trait attributes. The sink hydraulic zones such as pools were indicated to favour exposure to and ingestion of microplastics compared to the flush zones such as riffles and fast runs. Large body size macroinvertebrates were associated with the sink zone. Taxa with a very small body size had a higher likelihood for microplastics ingestion than taxa with other body sizes. Collectorgathering macroinvertebrates taxa that have operculate gills with small body sizes were more prone to exposure to microplastics in hydraulic biotopes with slow to very slow velocities. Fibres were the most abundant plastic ingested by macroinvertebrates preferring the flush zone while fibres and fragments were mostly ingested by those preferring the sink zones. The binomial logistic model revealed a highly significant result for the likelihood of operculate gill shape to clog in the sink hydraulic zone. The result of the binomial logistic regression indicates the usefulness of the trait-based approach for predicting exposure to microplastics. Overall, the study reveals the influences of hydro-geomorphological features on the transport dynamics of microplastics and the usefulness of the trait-based approach in the ecological study of microplastics in riverine systems. , Thesis (PhD) -- Faculty of Science, Institute for Water Research, 2024
- Full Text:
- Date Issued: 2024-10-11
- Authors: Owowenu, Enahoro Kennedy
- Date: 2024-10-11
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/466666 , vital:76765 , DOI https://doi.org/10.21504/10962/466666
- Description: Microplastics in rivers pose an ecological risk. Hydraulic biotopes form distinct flow patches that vary longitudinally along the river, potentially influencing the transport dynamics of microplastics. Macroinvertebrates exhibit adaptations to different hydraulic biotopes through their unique traits. These traits can mediate their exposure to microplastics, thereby imposing selective pressures on these organisms. Different taxa often demonstrate preferences for specific hydraulic biotopes characterized by distinct flow regimes. Understanding the transport dynamics of microplastics mediated by hydraulic biotopes and the potential exposure of macroinvertebrates at the hydraulic biotope scale is important for determining the fate of riverine microplastics and detecting species at risk. Both empirical and theoretical studies have highlighted the interconnectedness of hydrology, geomorphology, and microplastic transport in rivers, yet, there remains a gap in understanding how a hydro-geomorphological approach could enhance the understanding of the microplastic transport process. Little is known about the role of traits in driving macroinvertebrate exposure to microplastics at a scale relevant to ecological dynamics. This study addressed these gaps by applying a hydro-geomorphological approach to investigate the distribution of microplastics at the hydraulic biotope scale and assessed the potential exposure of macroinvertebrates using a trait-based approach. This study also explored the relationship between microplastic abundance and selected water physicochemical properties, as well as the influence of adjacent land use types. By integrating these aspects the research provided a comprehensive understanding of microplastics dynamics in river systems, shedding light on both environmental factors shaping their distribution and the potential impacts on aquatic organisms. The study was conducted over the wet and dry seasons (October 2021 – July 2022) at 10 sites located in the upper, middle, and lower reaches of the Swartkops and Buffalo River systems in the Eastern Cape Province of South Africa. The hydraulic biotopes (i.e., pools, runs, riffles) were grouped into two conceptualised forms, namely, sink and flush hydraulic zones and were characterized by hydraulic indices such as the Froude number and the Reynolds number. The flush hydraulic zone represents hydraulic biotopes where microplastics can potentially be remobilized quickly into suspension, and the sink represents biotopes where microplastics can potentially accumulate and remobilisation is far slower. Fast-to-moderate flowing hydraulic biotopes were conceptualised as microplastics flush zones while slow-flowing to still biotopes as microplastic sink zones. Samples were collected at different depths in each hydraulic zone to quantify suspended and settled forms of microplastics. Microplastics targeted in this study ranged in size from 0.063 mm to less than 5 mm. Classification was achieved through microscopic observation, and confirmation via Fourier Transform Infrared Spectroscopy (FTIR-ATR) was conducted for samples ranging from 0.5 mm to less than 5 mm. At the site level, settled microplastics showed statistically significant spatial and temporal variations between the sites, and between the seasons (P < 0.05). The suspended microplastic varied only spatially. Fibres and fragments were the dominant microplastic shape, while polyethylene and polypropylene were the dominant microplastic polymers. Suspended microplastics showed statistically significant variation between urban land cover and other land cover categories (industrial, agricultural, rural, and natural land cover). Microplastics abundance was associated with high levels of turbidity, total suspended solids, total inorganic nitrogen, higher temperatures and increasing electrical conductivity. At the hydraulic biotope scale, the mean occurrence of suspended microplastics (1.76 ± 1.44 items/L; mean + SD) in the flush hydraulic zone was higher than that in the sink zone (1.54 ± 1.46 items/L), while settled microplastics were more abundant in the sink hydraulic zone (1.82 ± 1.98 items/L) than the flush hydraulic zone (1.32 ± 1.49 items/L). This observation was in line with the prediction in this study. The mean suspended and settled microplastics concentrations were higher during the wet season across the flush and sink hydraulic zones than in the dry season. Global multivariate analysis of variance (MANOVA) and two-way analysis of variance (ANOVA) revealed significant spatial and temporal variations in settled microplastics abundances between the flush and sink hydraulic zones. The results indicated that geomorphologically defined units such as riffles and moderate to fast runs (flush) generally contained lower amounts of settled microplastics compared to pools and backwaters (sink). However, this distinction between the flush and sink microplastic zones was observed only for settled microplastics and not for suspended microplastics. Suspended and settled microplastics showed a statistically significant relationship with the Froude number index. The generalised additive model indicated that settled microplastics abundance distribution decreased significantly with increasing Froude number value in the flush zone. Suspended microplastics decreased at low Froude number values and showed an increasing trend at higher Froude number values of about 0.75. The results indicate the usefulness of the hydraulic biotope scale microplastic monitoring approach in detecting microplastic hotspots and explaining variations in microplastics abundances driven by instream hydraulics. Four traits and ecological preferences of macroinvertebrates including body size, gill type, feeding habit, and velocity preferences were selected and resolved into 17 trait attributes. The sink hydraulic zones such as pools were indicated to favour exposure to and ingestion of microplastics compared to the flush zones such as riffles and fast runs. Large body size macroinvertebrates were associated with the sink zone. Taxa with a very small body size had a higher likelihood for microplastics ingestion than taxa with other body sizes. Collectorgathering macroinvertebrates taxa that have operculate gills with small body sizes were more prone to exposure to microplastics in hydraulic biotopes with slow to very slow velocities. Fibres were the most abundant plastic ingested by macroinvertebrates preferring the flush zone while fibres and fragments were mostly ingested by those preferring the sink zones. The binomial logistic model revealed a highly significant result for the likelihood of operculate gill shape to clog in the sink hydraulic zone. The result of the binomial logistic regression indicates the usefulness of the trait-based approach for predicting exposure to microplastics. Overall, the study reveals the influences of hydro-geomorphological features on the transport dynamics of microplastics and the usefulness of the trait-based approach in the ecological study of microplastics in riverine systems. , Thesis (PhD) -- Faculty of Science, Institute for Water Research, 2024
- Full Text:
- Date Issued: 2024-10-11
Traversing Doctoral Borderlands: Black doctoral students’ experiences of identity construction in South Africa
- Authors: Hwami, Rudo Fortunate
- Date: 2021-10-29
- Subjects: Doctoral students South Africa , College students, Black South Africa , Marginality, Social South Africa , Public spaces Social aspects , Culture Social aspects , Rhythm , Identity (Psychology) , Borderlands Theory
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/191062 , vital:45055 , 10.21504/10962/191062
- Description: Doctoral studies are described as a process of formation and becoming. This is an in-between space between unknowing and knowing, within and without the ivory tower of academia. In this in-between space the doctoral candidate takes the role of a novice and apprentice unlearning the student/unknowing past and learning to become a professional in academia. This project utilises the borderlands theory to understand the experiences of doctoral students as they undergo the process of becoming and intellectual identity formation. Whilst ‘journey’ and other metaphors that have been used to understand doctoral student experiences capture the process of becoming as a progression through the liminal stages – proposal, literature review, context, writing, reading etc. These stages presuppose temporality of being leading to stasis/completion. I argue that such conceptualisation of doctoral studies, although useful, depict one side of the story and provide a limited, monolithic, and homogenising understanding of the spatial configurations of doctoral space and intellectual identity formation. The dominant discourses of doctoral conceived and perceived space, liminal stages and understanding of doctoral student experiences, mask the more latent and intimate liminal stages of intellectual identity formation. Drawing from borderlands theory, I firstly argue for a holistic approach to understanding the spatiality of doctorate studies. Secondly, I argue that liminality is an everyday process integral to human existence where one is always in a state of ideological transition. An important state of liminality is the awareness of ‘Self’ in perpetual motion, caught between two worlds dominated/dominator and two ideologies of oppression/resistance. If this side of liminality is not made visible, institutional spaces, such as the doctorate, privileged with the power to disseminate and position onto-epistemologies as universal can be used to reproduce and reinforce exclusionary onto-epistemologies that subsequently impact intellectual identity formation. Using Lefebvre’s (1991) rhythmanalysis method, I use student experiences not as mere data for analysis, but as an act of envisioning, reinventing and coknowledge production to propose borderlands as a new metaphor to study doctoral spatial realities and the experiences of the students that traverse through it. , Thesis (PhD) -- Faculty of Humanities, Politics and International Studies, 2021
- Full Text:
- Date Issued: 2021-10-29
- Authors: Hwami, Rudo Fortunate
- Date: 2021-10-29
- Subjects: Doctoral students South Africa , College students, Black South Africa , Marginality, Social South Africa , Public spaces Social aspects , Culture Social aspects , Rhythm , Identity (Psychology) , Borderlands Theory
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/191062 , vital:45055 , 10.21504/10962/191062
- Description: Doctoral studies are described as a process of formation and becoming. This is an in-between space between unknowing and knowing, within and without the ivory tower of academia. In this in-between space the doctoral candidate takes the role of a novice and apprentice unlearning the student/unknowing past and learning to become a professional in academia. This project utilises the borderlands theory to understand the experiences of doctoral students as they undergo the process of becoming and intellectual identity formation. Whilst ‘journey’ and other metaphors that have been used to understand doctoral student experiences capture the process of becoming as a progression through the liminal stages – proposal, literature review, context, writing, reading etc. These stages presuppose temporality of being leading to stasis/completion. I argue that such conceptualisation of doctoral studies, although useful, depict one side of the story and provide a limited, monolithic, and homogenising understanding of the spatial configurations of doctoral space and intellectual identity formation. The dominant discourses of doctoral conceived and perceived space, liminal stages and understanding of doctoral student experiences, mask the more latent and intimate liminal stages of intellectual identity formation. Drawing from borderlands theory, I firstly argue for a holistic approach to understanding the spatiality of doctorate studies. Secondly, I argue that liminality is an everyday process integral to human existence where one is always in a state of ideological transition. An important state of liminality is the awareness of ‘Self’ in perpetual motion, caught between two worlds dominated/dominator and two ideologies of oppression/resistance. If this side of liminality is not made visible, institutional spaces, such as the doctorate, privileged with the power to disseminate and position onto-epistemologies as universal can be used to reproduce and reinforce exclusionary onto-epistemologies that subsequently impact intellectual identity formation. Using Lefebvre’s (1991) rhythmanalysis method, I use student experiences not as mere data for analysis, but as an act of envisioning, reinventing and coknowledge production to propose borderlands as a new metaphor to study doctoral spatial realities and the experiences of the students that traverse through it. , Thesis (PhD) -- Faculty of Humanities, Politics and International Studies, 2021
- Full Text:
- Date Issued: 2021-10-29
Perceived success of skills-development readiness within 4IR in RSA
- Authors: Hunt, Norman William
- Date: 2021-04
- Subjects: Technological innovations -- Economic aspects , Labor demand -- Research -- South Africa , Labor supply -- Research -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/51567 , vital:43310
- Description: The purpose of this study was to develop four scenarios for South Africa over the next forty years. The Positive Seed scenario portrays a positive image of hope and determination, with positive institutional innovations, as well as positive innovative learning methodologies. While the Shankar scenario also portrays positive institutional innovations, it is lacking in terms of innovation learning methodologies. The Negative Seed is lacking in both innovation learning methodologies, as well as institutional innovations. Finally, the fourth scenario, that of the ‘What If’ scenario, portrays a scenario whether good innovative learning methodologies exist, or not, but lacks institutional innovativeness. The goal of this thesis was not only to affirm the known and knowable about the skills-development environment, but it is also aimed at exploring its future within the 4IR towards 2060. This was achieved by scenario planning and the Causal Layered Analyses (CLA) methodology, which is designed to help navigate through this creative process. This thesis starts off by identifying the forces of change, which it then combines in various ways to create the set of scenarios about how the future of the skills-development sector could evolve towards 2060. This thesis provides useful insight into drivers for change for the South African skills-development sector and how to anticipate skills-readiness in South Africa within the 4IR towards 2060 in accordance with the CLA and scenario planning methods. This thesis looks at the future of skills-development in South Africa over the next forty years from a decision makers point of view. , Thesis (DBA) -- Faculty of Business and Economic Sciences, Business Administration, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Hunt, Norman William
- Date: 2021-04
- Subjects: Technological innovations -- Economic aspects , Labor demand -- Research -- South Africa , Labor supply -- Research -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/51567 , vital:43310
- Description: The purpose of this study was to develop four scenarios for South Africa over the next forty years. The Positive Seed scenario portrays a positive image of hope and determination, with positive institutional innovations, as well as positive innovative learning methodologies. While the Shankar scenario also portrays positive institutional innovations, it is lacking in terms of innovation learning methodologies. The Negative Seed is lacking in both innovation learning methodologies, as well as institutional innovations. Finally, the fourth scenario, that of the ‘What If’ scenario, portrays a scenario whether good innovative learning methodologies exist, or not, but lacks institutional innovativeness. The goal of this thesis was not only to affirm the known and knowable about the skills-development environment, but it is also aimed at exploring its future within the 4IR towards 2060. This was achieved by scenario planning and the Causal Layered Analyses (CLA) methodology, which is designed to help navigate through this creative process. This thesis starts off by identifying the forces of change, which it then combines in various ways to create the set of scenarios about how the future of the skills-development sector could evolve towards 2060. This thesis provides useful insight into drivers for change for the South African skills-development sector and how to anticipate skills-readiness in South Africa within the 4IR towards 2060 in accordance with the CLA and scenario planning methods. This thesis looks at the future of skills-development in South Africa over the next forty years from a decision makers point of view. , Thesis (DBA) -- Faculty of Business and Economic Sciences, Business Administration, 2021
- Full Text:
- Date Issued: 2021-04
Dynamics of agricultural micro, small and medium enterprise life-cycle financing and implications for sector development in Zimbabwe
- Kichini, Gilbert https://orcid.org/0000-0003-2972-1023
- Authors: Kichini, Gilbert https://orcid.org/0000-0003-2972-1023
- Date: 2021-03
- Subjects: Agriculture -- Economic aspects -- Zimbabwe , Sustainable development
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20296 , vital:45648
- Description: Small, micro and medium-scale enterprises (SMMEs) contribute significantly to economic growth, employment and boosting the livelihoods of the poor in Zimbabwe. In the context of the Fast-track Land Reform and Re-distribution programme, agricultural SMMEs are viewed as the main pillar that anchors the recovery of the agricultural sector. Despite the key role they play, these SMMEs operate in a financially constrained environment in which access to funding is limited. In such a context, the ability of the SMMEs to perform their role depends on the strategic use of limited funding. One way to achieve this is to ensure that the funding used at each of the life-cycle stages of the business is the most suitable in addressing the main threats to business success. Much has been studied about how the supply-side factors have constrained growth and development. However, very limited focus has been placed on how SMME owners use the limited funding secured to address the main operational problems faced. The funding behaviour of the owners has to support the supply-side initiatives if the SMMEs are to survive and fulfil their envisaged role in the economy. This study thus analyses the use of funding by the owners along the business life-cycle based on a six-stage life-cycle model. It further analyses the suitability of such funding given the unique operational needs and challenges per stage as well as best practices. The specific objectives of the study are to identify the level of knowledge that SMME owners have about the financing options available and which ones are mostly used, determine the use and suitability of life-cycle financing focusing on agricultural SMMEs and also determine the most suitable life-cycle funding in terms of best practices for sector development. A cross-sectional survey research design was used given the lack of accurate time-series data and it followed a mixed-methods approach. Quantitative and qualitative data were analysed. The owners or managers of agricultural SMMEs and the institutions providing funding constituted the two populations studied. A multiple-stage sampling strategy was used to determine a final sample of 320 owners of agricultural SMMEs while purposive sampling was used to draw a sample of 12 main SMME financing institutions. A semi-structured questionnaire was used to collect data from the owners while an administered semi- structured questionnaire was used for financing institutions. The unit of analysis was the funding used along the business life-cycle. Frequency, binary logistic regression, Chi-Square tests of association and Odds-ratio analysis were used for quantitative data analysis while Qualitative-failure mode, effects and criticality analysis (Q-FMECA) and thematic analysis were used to analyse qualitative data. Results show a persistent rather than transitory reliance on internal funding contrary to theoretical propositions on life-cycle financing. Overall, life-cycle funding used was not in line with best practices for funding SMMEs especially in financially constrained environments where funding should be effectively and efficiently used. The study adds to literature on agricultural SMMEs funding in financially constrained environments and makes offers some policy recommendations to improve financing for development of the key subsector. , Thesis (DPhil) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-03
- Authors: Kichini, Gilbert https://orcid.org/0000-0003-2972-1023
- Date: 2021-03
- Subjects: Agriculture -- Economic aspects -- Zimbabwe , Sustainable development
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/20296 , vital:45648
- Description: Small, micro and medium-scale enterprises (SMMEs) contribute significantly to economic growth, employment and boosting the livelihoods of the poor in Zimbabwe. In the context of the Fast-track Land Reform and Re-distribution programme, agricultural SMMEs are viewed as the main pillar that anchors the recovery of the agricultural sector. Despite the key role they play, these SMMEs operate in a financially constrained environment in which access to funding is limited. In such a context, the ability of the SMMEs to perform their role depends on the strategic use of limited funding. One way to achieve this is to ensure that the funding used at each of the life-cycle stages of the business is the most suitable in addressing the main threats to business success. Much has been studied about how the supply-side factors have constrained growth and development. However, very limited focus has been placed on how SMME owners use the limited funding secured to address the main operational problems faced. The funding behaviour of the owners has to support the supply-side initiatives if the SMMEs are to survive and fulfil their envisaged role in the economy. This study thus analyses the use of funding by the owners along the business life-cycle based on a six-stage life-cycle model. It further analyses the suitability of such funding given the unique operational needs and challenges per stage as well as best practices. The specific objectives of the study are to identify the level of knowledge that SMME owners have about the financing options available and which ones are mostly used, determine the use and suitability of life-cycle financing focusing on agricultural SMMEs and also determine the most suitable life-cycle funding in terms of best practices for sector development. A cross-sectional survey research design was used given the lack of accurate time-series data and it followed a mixed-methods approach. Quantitative and qualitative data were analysed. The owners or managers of agricultural SMMEs and the institutions providing funding constituted the two populations studied. A multiple-stage sampling strategy was used to determine a final sample of 320 owners of agricultural SMMEs while purposive sampling was used to draw a sample of 12 main SMME financing institutions. A semi-structured questionnaire was used to collect data from the owners while an administered semi- structured questionnaire was used for financing institutions. The unit of analysis was the funding used along the business life-cycle. Frequency, binary logistic regression, Chi-Square tests of association and Odds-ratio analysis were used for quantitative data analysis while Qualitative-failure mode, effects and criticality analysis (Q-FMECA) and thematic analysis were used to analyse qualitative data. Results show a persistent rather than transitory reliance on internal funding contrary to theoretical propositions on life-cycle financing. Overall, life-cycle funding used was not in line with best practices for funding SMMEs especially in financially constrained environments where funding should be effectively and efficiently used. The study adds to literature on agricultural SMMEs funding in financially constrained environments and makes offers some policy recommendations to improve financing for development of the key subsector. , Thesis (DPhil) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-03
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