The trade of non-timber forest products (NTFPs), also known as biotrade, has existed for hundreds of years - as has the traditional knowledge associated with such products. More recently, this form of trade has advanced to include genetic resource components found within natural resources (bioprospecting). International agreements such as the Convention on Biological Diversity (CBD) and Nagoya Protocol came into force in 1993 and 2010 respectively, to ensure that biological diversity is conserved, sustainably utilised, and that the benefits arising from the utilisation of genetic resources and/or associated traditional knowledge are shared in an equitable manner. In practice, however, there is a lack of evidence to suggest whether the provisions of the CBD and Nagoya Protocol are being adequately implemented and achieved. This research focuses on the commercialisation of the resurrection bush (Myrothamnus flabellifolius) in Zimbabwe, Namibia and South Africa and critically evaluates how the requirements of the CBD and Nagoya Protocol are applied. The resurrection bush spans a number of countries and has been used traditionally by a variety of ethnic communities residing in Africa. Traditional medicinal uses for the resurrection bush include using the plant to treat colds and flu, scurvy, coughs, abdominal pain, epilepsy, and asthma. This study aims to uncover and understand the way in which benefit sharing and environmental sustainability are interpreted and implemented in various resurrection bush commercialisation approaches. Six objectives are articulated to achieve this aim: (1) to review the historical use and traditional knowledge associated with the resurrection bush; (2) to describe the different ways the resurrection bush is commercialised and the different processes each commercialisation strategy follows; (3) to describe the actors involved in the different resurrection bush commercialisation strategies and their roles in the commercialisation process; (4) to explore, within each commercialisation strategy, how commercial actors gain access to resources; (5) to describe and analyse the range of benefits derived from each commercialisation approach; and (6) to assess the policy implications and practical applications of current resurrection bush commercialisation approaches. This research adopted a qualitative case study methodological approach, in which 26 key informant interviews and 137 semi-structured harvester interviews were conducted in Namibia, Zimbabwe and South Africa. The key informants consisted of private companies, NGOs, and government officials across all three countries. Interviews with these informants were carried out to determine the diversity of commercialisation approaches associated with the resurrection bush, the actors involved, the ways in which commercial entities gain access to resources, how benefits are shared, and what measures are put in place for environmental sustainability. Further interviews were conducted with resurrection bush collectors in Namibia and Zimbabwe to review the historical and traditional uses associated with the resurrection bush. Understanding these uses provides insight into the types of agreements developed for its commercialisation and associated environmental, social and economic benefits. It was found that there are three commercialisation approaches associated with the resurrection bush across Namibia, Zimbabwe and South Africa. They are: (1) Informal trade, where harvesters sell raw material directly to consumers based on informal, verbal agreements; (2) Biotrade, where the value chain is longer and consists of more formal agreements; and (3) Bioprospecting, where research and development of the resurrection bush is a strong component, involving negotiations with harvesters and formal written agreements. Several key findings emerged to inform current and future commercialisation approaches. The inadequate implementation of regulatory frameworks within each commercialisation approach has negatively impacted harvesters and overall economic growth. Harvesters are not receiving maximum benefits from commercialisation due to elite capture of benefits from resurrection bush cultivation sites and significant profit margins on end products. Traditional knowledge holders are not adequately compensated and acknowledged for their innovations and practices due to the absence of sufficient historical records of traditional knowledge, and cooperation between countries and communities who share resources which are commonly used. Long-term conservation efforts associated with the resurrection bush are lacking in all commercialisation approaches due the belief that because there is an abundance of the resource in the wild, additional conservation measures are not needed.

Focusing on the small-scale fisheries sector, this thesis examines the question of how the usage of Information and Communication Technology (ICT) can unlock value chain opportunities for fishers. Using a case study approach by focusing on the communities of Lamberts Bay and Kleinmond in the Western Cape of South Africa, it seeks to discover what ICTs should take cognisance of to adequately speak to the value chain realities of small-scale fishers. Some of the work done was observed while engaging with fishers from both communities and other relevant stakeholders during certain engagements with the Abalobi programme, a co-designed smartphone application programme. The emphasis of the research was to speak to different stakeholders who are involved in the value chain and who are engaging with or impact the value chains of small-scale fishing communities. As value chains start with small-scale fishers, their narratives are of utmost importance as they are the initiators of these value chains. The three objectives of this research are to understand the value chain activities of the two communities, differentiate the different value chain activities of the communities at the local, regional and international levels and then contribute to how ICTs such as Abalobi can assist efforts of connecting fishers to their markets. Interviewing and engaging fishers, supportive organisations, authorities, value chain stakeholders in both communities as well as corporates and an ICT specialist, the thesis considers the different perspectives and needs of those involved in the small-scale fisheries value chain. The result of this thesis lead to six ICT requirements being identified to unlocking of small-scale fishing value chains: easy to use, self-sustaining, people-centred and inclusive, integrated, evolving and detailed. Although value chains exist in the sector, ICTs can enable better coordination between stakeholders in it. This research was done to understand how ICTs as a tool can improve and better facilitate the interactions between fishers and their desired markets and that their narratives are brought to the fore in understanding the value chains and in sourcing ICT solutions for them.

Polluted urban surface runoff degrades the receiving water bodies and impacts on downstream water quality and ecological systems. In response, there is growing research attention that is focused on how to treat surface water runoff before it is discharged into these water bodies which includes using a variety of land-based treatment systems. This thesis investigates the performance of large scale, low-cost nature-based filtration systems to clean contaminated water without the addition of chemicals. A relatively small portion of water that is generated and discharged from a slum settlement in South Africa, where water-based services are limited and often dysfunctional, is intercepted and diverted through six biofiltration cells. These cells were packed with different types of natural media, three of which were planted with a variety of reeds while the other cells were kept as control cells. Water that flows into each biofiltration cell is controlled via a network of valves. Flow meters were used to determine the volume and rate of discharge to each cell. The purpose of this study was to determine the effects of HLR (hydraulic loading rate) and HRT (hydraulic retention time) on water quality that was discharged from each cell. This study determined whether the resulting effluent could be repurposed for irrigating edible crops. The final discharge was tested to confirm the differences between the influent and effluent in each cell. Overall the vegetated cell that was packed with large stones (19 - 25 mm aggregates) (LSV) performed the best and displayed reductions of 98.51% of ammonia and 100% of orthophosphate concentrations. E. coli bacteria were also reduced by nearly 100%. Phytoremediation played a role in reducing contamination by removing 97.07%, 89.70% and 100% for ammonia, orthophosphate and E. coli respectively over the study period of four months. Throughout the study, Large Stone Vegetated cells (LSV) reduced nitrite levels by 77.21% with higher removal rates for ammonia, orthophosphate, nitrites, respectively, compared to Large Stone cells (LS). An HRT of approximately seven days resulted in the most improved water quality for LSV, LS, Small Stone (SS) and Small Stone Vegetated cells (SSV) for most of the parameters that were tested. However, orthophosphate leaching occurred in the SSV cell. Peach Pip Vegetated cells (PPV) and Peach Pip cells (PP) did not perform as well as the other cells.

The rapid and intensifying impacts of the changing climate and subsequent need to alleviate these have resulted in the synonymous pathway towards a global energy transition. Through enhanced national climate action plans, countries worldwide are formulating development pathways that are aligned to a carbon-neutral and net-zero emissions global economy. The recent IPCC Sixth Assessment report confirmed, once again, the urgency to reduce emissions to prevent catastrophic climate impacts. While nations have submitted their enhanced climate action plans, developing countries like South Africa battle with severe developmental challenges. The imperative to respond to climate change alongside addressing entrenched development challenges such as high unemployment, inequality, and poverty make it essential for the country's energy transition to be just. Frameworks theorising technological transitions predominantly originate from the global north. Thus, to avoid adopting frameworks from their place of origin and replicating them in different contexts, this study merges Geel's multi-level perspective (MLP) framework with the energy justice framework to have a better understanding of the composition of actors and discourse shaping South Africa's just energy transition debate. The study achieves this by operationalizing a range of qualitative discursive approaches, namely content and media frame analysis. Over an 11-year study period, online newspaper articles are used as a unit of analysis to develop actor categories, these are accompanied by frames (in the form of statements said by the identified actors). With the assumption of there being no agency at the landscape level of the MLP, landscape developments placing pressure on the regime identified from the analysis include the climate change phenomenon, pressure from the international community, and declining global demand for coal. At the regime level, actors engaging in activities reinforcing the status quo such as Eskom and members of business fell within the incumbent (core) actor category whereas actors who were identified as outsiders (i.e., those that openly criticize the regime by highlighting problems associated with it) mainly consisted of civil society groups. Within each actor category, actors use discourse that either stabilizes or destabilizes the regime. At the niche level, the financial intermediary role played by development finance institutions (DFI's) emerged as key to creating protective spaces for the adoption of renewable energy technologies throughout the study period. Finally, because of the varying levels of power and interactions between actors across the multiple levels of the country's energy transition, issues of fairness in decision-making (procedural justice), representation (recognitional justice) and share in costs and benefits of the regime and transition emerge (distributive justice).

This study undertakes a CMIP5 model selection specific to the Winter Rainfall Zone (WRZ) of South Africa, seeking to reduce the range of future climate projections through identifying a subset of models with increased realism and independence. In order to navigate the subjectivity in identifying relevant circulation metrics to assess models against, the ‘Day Zero' drought is used as a characteristic episode. Here initially the extensive literature produced subsequent to the drought has been drawn on to identify and evaluate relevant regional process metrics, before utilising the anomalous conditions during the drought to validate various assessment methods. The dynamics subsequently identified as being most influential to rainfall supply in the WRZ include the South Atlantic subtropical jet stream responsible for steering of mid-latitude storm systems, the South Atlantic subtropical high, and the presence, or preferably absence, of precipitation blocking subsidence, and the prevalence of mid-latitude storm systems, critical for transport and upliftment of moisture to the region. Models were subsequently assessed against these metrics and scored following the technique of McSweeney et al. (2015). Unrealistic models were removed from the ensemble while significantly biased models were also excluded as their absence did not significantly reduce the range of future projections. The same scoring methods were then utilised to create a genealogy of models attaining similar results to that of Knutti, Masson & Gettelman (2013). A subset of 6 CMIP5 models which are more independent and historically more realistic than that of the full ensemble were subsequently identified. While the range of future temperature projections of the final ensemble are somewhat constrained in comparison to the full ensemble, the primary utility is argued to be the reduced number of models where a future researcher may consider each model's projected future climate pathway individually before selecting a model, or models, which best informs their use case, whilst being assured that this model performs suitably well in the region and that the initial ensemble considered adequately represents model uncertainty, while strong similarity between two or more models within the ensemble will not be unduly biasing results.

South Africa is continuously experiencing irregular weather and climate, which is attributed to climate change and the El Niño Southern Oscillation. These have resulted in temperature increases, irregular rainfall patterns, and increased frequency of extreme events. In South Africa, smallholder farmers are the most vulnerable to extreme weather events due to their limited capacity to adapt. Their vulnerability results from a series of factors constraining their ability to adapt, such as limited resources, knowledge, and skills. Furthermore, smallholder farmers are highly dependent on rainfed agriculture, making them more sensitive. The lack of weather information that is tailored for user needs or adapted well enough is also a concerning issue that exacerbates the living conditions of smallholder farmers. This makes it difficult for them to sustain their agricultural activities. Over the years, weather information has been recognized as having the potential to be useful in agriculture, especially in informing farming practices, planning, and reducing weather events impacts among smallholder farmers. However, access and use of weather information that applies to the context of smallholder farmers which is tailored to meet smallholder farmers needs, has been limited and has contributed to limited understanding and low use levels of weather information. This has increased the need to understand the weather information needs of smallholder farmers as this is important to ensure that farmers can effectively use and understand the information. In South Africa, limited studies have looked at the weather information needs of smallholder farmers. Hence, a shift of attention towards investigating the weather information needs of smallholder farmers has increasingly become necessary. The present study investigated how to better communicate the weather information needs of smallholder farmers in the Eastern Cape province of South Africa. A mixed-methods approach was used to collect and analyze the data. Interviews with open-ended and closed-ended questions were conducted with smallholder farmers and agricultural extension officers. Interviews were conducted to gain an insight on the baseline and characteristics of weather information farmers receive and their needs. The same was done with extension officers to get their insight on the needs of farmers and the needs of extension officers. 2 The findings of the study confirm that the current weather information system is inefficient as the information does not fully meet the needs of smallholder farmers. Most of the farmers expressed that they currently receive information on rainfall, temperature, and heavy rainfall but stated that they would like to receive information on drought as they are currently experiencing dry periods. The farmers mentioned that they receive weather information mostly from the television, radio, and a few from weather apps. Most of the farmers receive weather information in maps and audio, expressing that maps make it easy for them to visualize and understand the information. From the television, they receive the information in IsiXhosa and IsiZulu, and they mentioned that weather information in IsiXhosa is easy to understand as it is their local language. In weather apps, farmers mentioned that they receive weather information in English and expressed concerns about understanding weather information in English. As a result, most farmers preferred receiving weather information in IsiXhosa as they can understand the language. Additionally, farmers also expressed that they only receive weather information daily, and they stated that they would like to receive weather information daily, weekly, monthly, and seasonally to plan their farming activities and to know when to plant. Furthermore, most of the farmers expressed that they encounter some challenges with the information they receive. Some of the challenges included issues such as the inaccuracy of the information and scale issues. The farmers complained that the information they receive is not downscaled to their local scale, making it difficult for them to apply the information on their local scale decisions. Therefore, without significant improvement of the issues mentioned above and addressing the weather information needs of farmers, weather information use and understanding will remain low and will increase the vulnerability of smallholder farmers to extreme weather events. To prevent this, there is a growing need for weather information to meet the needs of smallholder farmers so that they can understand and use the information efficiently, especially in the face of increasing extreme weather events such as drought in South Africa.

Thesis--ha-Universitah ha-ʻIvrit bi-Yerushalayim. / Added t.p. in English: The Egyptian topograpical [sic] relating to the history of Palestine in the biblical period. Added t.p., contents and abstract in English. Folded map inserted. Includes bibliographical references (p. 291-324).

Inaug.--diss.--Berlin. / Lebenslauf.

Inaug.--diss.--Berlin. / Lebenslauf.

Inaug.-diss.--Tübingen. / Lebenslauf. "Literaturverzeichnis": p. vii-xi.