The use of gabions as an eco-engineering approach to enhance estuarine fish habitats in urbanised waterways
- Authors: Seath, Jessica L , Firth, L B , Froneman, P William , Claassens, Louw
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/479396 , vital:78297 , https://doi.org/10.1016/j.ecoleng.2024.10743
- Description: Anthropogenic activities are often concentrated around coastal ecosystems. Harbours and marinas comprising artificial structures with steeper orientations and reduced topographic complexities than natural ecosystems contribute to habitat alteration and biodiversity loss. Ecological engineering aims to mitigate these impacts by integrating ecological principles into coastal development to enhance habitat potential and improve biodiversity. This study investigated the potential of gabions (rock-filled wire mesh baskets) to enhance fish abundance and biodiversity by comparing these structures to conventional seawalls in an urbanised marina in Knysna, South Africa. Remote underwater video systems were used to determine fish diversity, abundance and composition over a 12-month period from August 2020 to August 2021. Overall, a significantly greater abundance and diversity of fish were associated with gabions compared to seawalls. Importantly, the gabions supported an endangered species, the Knysna seahorse (Hippocampus capensis), and two near threatened species recorded only on the gabions. This study highlights the efficacy of using structurally complex gabions as a viable ecoengineering alternative to less complex seawalls to enhance fish habitat.
- Full Text:
- Date Issued: 2025
Decolonizing Journalism Education in South Africa
- Authors: Aiseng, Kealeboga
- Date: 2024
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/455437 , vital:75430 , ISBN 9781003352907 , https://www.taylorfrancis.com/chapters/edit/10.4324/9781003352907-6/decolonizing-journalism-education-south-africa-kealeboga-aiseng
- Description: The British, French, and Portuguese regimes colonized most African countries. This colonization took away African languages, cultures, religions, and practices, only to replace them with colonial traditions. Decolonization debates are now rife in South Africa: decolonizing higher education, the economy, the law, and the justice system. All these debates and attempts are made to achieve equity and justice in the country. To contribute to these debates, this chapter examines how journalism education can be decolonized in South Africa from a sociolinguistic perspective. To achieve its aim, the chapter will review course descriptions of journalism curriculums at three universities in South Africa that offer journalism education and possible ways to decolonize the curriculums from the sociolinguistics perspectives. The chapter has concluded that sociolinguistics is critical in decolonizing journalism education. Journalism is a verbal medium; it uses language to communicate. Hence, it is essential for journalism curriculums in South Africa to teach students that language and identity can influence journalism practice to reflect its context and speak to its people in a language and forms that they understand.
- Full Text:
- Date Issued: 2024
Macro-locational determinants of Chinese foreign direct investment in Cameroon
- Authors: Andangnui, Quintabella , Louw, Lynette , Cattaneo, Nicolette S
- Date: 2024
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/470199 , vital:77335 , https://hdl.handle.net/10520/ejc-sajce_v27_n1_a5714
- Description: Macro-locational determinants of foreign direct investment (FDI) constitute a country’s comparative advantage in attracting FDI. Although literature identifies potential determinants of Chinese FDI, empirical studies reveal significant variation across countries, necessitating investigation of specific macro-locational factors in each context. Despite its abundant resources and reliance on FDI for development, Cameroon has experienced slow FDI growth. Efforts to enhance trade and investment relations between Cameroon and China make an understanding of Chinese FDI drivers crucial for policymakers. This study aims to ascertain the significance of macro-locational determinants in attracting Chinese FDI to Cameroon.
- Full Text:
- Date Issued: 2024
Public Health Communication and Language Policy at Rhodes University During the COVID-19 Pandemic
- Authors: Aiseng, Kealeboga , Mamase, Zikhona
- Date: 2024
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/455466 , vital:75432 , ISBN 9798369306246 , DOI: 10.4018/979-8-3693-0624-6.ch009
- Description: The COVID-19 pandemic offered unprecedented obstacles to public health communication worldwide. Pandemic revealed disparities and significant gaps in access to public health information for those not proficient in English, potentially leading to the exclusion of indigenous language speakers and minority communities from issues of national interest, including vital COVID-19 updates. This chapter examines the case study of Rhodes University in the Eastern Cape, South Africa and explores the institution's language policies and practices during the pandemic. The institution grapples with linguistic diversity, where English is the primary language of teaching and administration. The study explores language, public health communication, and inclusion at Rhodes University. It seeks to find linguistic and cultural contestations during this time by evaluating the university's response to the pandemic through language. The study uses document analysis to understand how Rhodes University's language practices impacted public health communication during the pandemic.
- Full Text:
- Date Issued: 2024
Determining the efficacy of push-pull for management of Eldana saccharina (Walker (Lepidoptera: Pyralidae) in sugarcane through on-farm field trials
- Authors: Mulcahy, Megan M , Conlong, Desmond E , Hill, Martin P
- Date: 2023
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/451313 , vital:75039 , http://dx.doi.org/10.17159/2254-8854/2023/a15654
- Description: An area-wide integrated pest management (AW-IPM) programme was developed to improve management of Eldana saccharina Walker (Lepidoptera: Pyralidae), a major pest of South African sugarcane. Push-pull technology is an important component of this AW-IPM approach. The sugarcane push-pull programme uses plants which are both repellent (Melinis minutiflora P. Beauv.(Cyperales: Poaceae)) and attractive (Cyperus dives Delile and Cyperus papyrus L.(both Cyperales: Cyperaceae) to E. saccharina. Previous research demonstrated the efficacy of push-pull in the Midlands North region of KwaZulu-Natal (KZN), South Africa. To date, little research has been conducted in coastal sugarcane growing areas. The aim of this study was to assess the feasibility of using push-pull for management of E. saccharina in coastal KZN, using large-scale on-farm field trials conducted on five model farms. On each farm, wetland habitats were rehabilitated with pull plants (C. dives and C. papyrus) and fields were intercropped with the repellent grass M. minutiflora. Eldana saccharina damage and infestation levels were recorded to assess the efficacy of push-pull, using a multiple before-after-control-impact (mBACI) design.
- Full Text:
- Date Issued: 2023
FinTech and SMEs financing: A systematic literature review and bibliometric analysis
- Authors: Sanga, Bahati , Aziakpono, Meshach J
- Date: 2023
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/469857 , vital:77301 , https://doi.org/10.1016/j.digbus.2023.100067
- Description: Small and medium-sized enterprises (SMEs) face obstacles in raising capital and accessing financial services due to information asymmetry, high transaction costs and lack of collateral. FinTech developments have made gathering and sharing information easier, changed how funds are mobilized and allocated, and increased capital-raising activities. This paper conducts a systematic literature review on FinTech and SME financing for the period 2008–2022. So far there are unstructured and separate publications on this topic. Therefore, there is a need to consolidate the empirical research and their findings on the effectiveness of FinTech in meeting SMEs' financing needs. The bibliometric findings show that few studies on FinTech and SME financing are empirical in nature. These empirical studies surged a decade later after FinTech 3.0 started in 2008, with the majority of them using quantitative methods based on data from surveys and FinTech platforms. Furthermore, emerging alternative digital financing to SMEs have attracted more empirical studies than those on FinTech and bank lending to SMEs. In terms of publications, China is dominating, followed by the United States. The content analysis shows that FinTech has increased the ability of financial and non-financial institutions to collect and process accurate information about SMEs, thus reducing information asymmetry and transaction costs. FinTech has also increased the speed and quality of the lending cycle, from establishing an SME pipeline, collecting and processing information, to loan screening, monitoring and repayment. Finally, the paper presents research gaps and areas for future studies, challenges and policy recommendations on this novel subject.
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- Date Issued: 2023
Mobile communication and urban/rural flows in a South African marginalised community
- Authors: Dalvit, Lorenzo
- Date: 2023
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/468162 , vital:77025 , https://doi.org/10.1177/000276422210928
- Description: This article draws on Castells’ concept of space of flows to explore the role of mobile communication in mediating the flows of ideas, people and resources concerning Dwesa, a rural community in South Africa. While it is the site of an ICT-for-development project fifteen years in the making, Dwesa is representative of many contemporary South African rural realities in terms of lack of infrastructure, endemic poverty and ur-ban migration. Mobile network coverage is almost universal, sustaining a bidirectional flow of people, resources and information between Dwe-sa and urban areas such as Cape Town. A critical review of the sub-stantial body of research conducted in the area, as well as thematic analysis of social media texts and semi-structured interviews with community members, reveal that mobile phones play an important and nuanced role in arranging physical or virtual rendezvous, facilitating transfers of monetary and other resources, and enabling timeless communication and exchange of information across distance.
- Full Text:
- Date Issued: 2023
Oxpecker host-selection in the Salambala conservancy, northeastern Namibia
- Authors: Lukubwe, Michael S , Craig, Adrian J F K , Manyangadze, Tawanda
- Date: 2023
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449934 , vital:74866 , https://doi.org/10.3957/056.053.0166
- Description: By studying the host-selection patterns of oxpecker species, researchers can gain valuable insights into their ecological roles and interactions with different host species. This information is crucial for developing effective conservation strategies that prioritise the protection of oxpeckers and their host populations. The study conducted field observations and recorded data on the number of oxpeckers and their respective host species. Additionally, this study investigated the relationship between host species and host parameters (body mass and hair length) in the Salambala conservancy in northeastern Namibia. Selection and density indices were used to calculate the number of host animals supporting one oxpecker as well as the oxpecker density on a host's body surface. Pentad-based counts of oxpeckers and ungulates were conducted.
- Full Text:
- Date Issued: 2023
For an African elenchus: colonial and postcolonial misprisions and Classics in Africa
- Authors: Van Schoor, David J
- Date: 2022
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/468468 , vital:77063 , https://doi.org/10.1093/bics/qbac002
- Description: This paper reflects on the god Dionysus in the context of African explorations of the role and meaning of Classical traditions in and for Africa. The problem of decolonization entails the creative challenge to conceive an African modernity, but how we shall recognize what that is to mean remains open. Knowledge as claim and contestation are foregrounded with Dionysus and in his presence. He is a figure who is chronically misprised, so that misprision itself becomes a feature of his experience and meaning. Offering examples of two kinds of popular interpretive stances and arguing that they represent typical but weak readings, the idea is developed that Africa requires elenchus as hermeneutic ideal, an epistemic pessimism and commitment to seeking as it finds its own way. It ought not, from a peripheral position, to adopt or reject the popular and low-yielding misprisions and cultural contestations that obtain in the Western academy and offer little to a flowering African Humanities.
- Full Text:
- Date Issued: 2022
Interdisciplinarity requires careful stewardship of powerful knowledge
- Authors: McKenna, Sioux , de Bie G J
- Date: 2022
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/434487 , vital:73068 , ISBN 9780367518707 , https://www.routledge.com/Enhancing-Science-Education-Exploring-Knowledge-Practices-with-Legitimation/Blackie-Adendorff-Mouton/p/book/9780367518707#:~:text=The%20book%20introduces%20Legitimation%20Code,grasp%20difficult%20and%20dense%20concepts
- Description: This book helps meet an urgent need for theorized, accessible and discipline-sensitive publications to assist science, technology, engineering and mathematics educators. The book introduces Legitimation Code Theory (LCT) and demonstrates how it can be used to improve teaching and learning in tertiary courses across the sciences. LCT provides a suite of tools which science educators can employ in order to help their students grasp difficult and dense concepts. The chapters cover a broad range of subjects, including biology, physics, chemistry and mathematics, as well as different curriculum, pedagogy and assessment practices. This is a crucial resource for any science educator who wants to better understand and improve their teaching.
- Full Text:
- Date Issued: 2022
Coastal dunefields maintain pre‐Holocene genetic structure in a rocky shore red alga
- Authors: Mmonwa, Kolobe L , Barker, Nigel P , McQuaid, Christopher D , Teske, Peter R
- Date: 2021
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444784 , vital:74298 , https://doi.org/10.1111/jpy.13182
- Description: Most intertidal algae have limited dispersal potential, and areas that lack hard substratum suitable for attachment are thus expected to isolate regional populations from each other. Here, we used nuclear and mitochondrial genetic data to compare genetic structure in two co‐distributed intertidal red algae with different dispersal potential along the South African coastline. Gelidium pristoides is divided into a south‐eastern and a south‐western evolutionary lineage separated by extensive, continuous sandy shoreline habitat adjacent to coastal dunefields. In contrast, Hypnea spicifera is genetically homogeneous throughout its range. In G. pristoides, the genetic breaks are associated with contemporary coastal dunefields. The age of the divergence event suggests that this may reflect the effect of older dispersal barriers, and that genetic structure was subsequently maintained by the formation of contemporary coastal dunefields.
- Full Text:
- Date Issued: 2021
Scenario development
- Authors: Hichert, Tanya , Biggs, Reinette , de Vos, Alta , Peterson, Garry
- Date: 2021
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/433857 , vital:73005 , ISBN 9781000401516 , https://library.oapen.org/handle/20.500.12657/49560
- Description: Scenario development connects to various other methods, but in particular to futures analysis (Chapter 10) as it is also regarded as a futures analysis method. It warrants a separate chapter in addition to the other futures analysis methods (described in Chapter 10) because of its importance and widespread use. Scenario development also connects to facilitated dialogues (Chapter 9), serious games (Chapter 12), participatory modelling and planning (Chapter 13), dynamical systems modelling (Chapter 26) and agent-based modelling (Chapter 28).
- Full Text:
- Date Issued: 2021
The cicada genus Tugelana Distant, 1912 (Hemiptera, Cicadidae): phylogenetic position and conservation status
- Authors: Villet, Martin H , Edwards, Shelley
- Date: 2021
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/440628 , vital:73798 , https://africaninvertebrates.pensoft.net/article/66891/
- Description: The cicada genus Tugelana Distant, 1912 is monotypic and endemic to south-eastern Africa. Material was not available for a recent molecular phylogeny of its tribe, so its precise phylogenetic placement is unestablished. Consequently, a 627 bp sequence of the cytochrome oxidase gene was obtained and its candidate relatives identified as several species of Platypleura Amyot and Audinet-Serville, 1843 using the BOLD Identification System and NCBI Genbank’s BLAST. Bayesian inference analyses indicated that the type species, the Maputaland Orangewing Cicada Tugelana butleri Distant, 1912, is closely related to the Dune Koko Orangewing Cicada Platypleura zuluensis Villet, 1989, which has a geographical distribution that is parapatric with T. butleri and which has aberrant genitalia for a member of Platypleura. This pair of species is placed fairly deep within the African clade of Platypleura. We therefore formally recognized Platypleura Amyot and Audinet-Serville, 1843 as a senior synonym of Tugelana Distant, 1912, syn. nov., and assign T. butleri Distant, 1912 to Platypleura as Platypleura butleri (Distant 1912), comb. nov. The species occurs on the wooded grasslands of the Maputaland coastal plateau east of Lebombo Mountains and south of Maputo Bay. Its Extent of Occurrence is about 6360 km2, which would qualify it as Vulnerable under the IUCN’s classification criteria for conservation status.
- Full Text:
- Date Issued: 2021
Using Google data to measure the role of Big Food and fast food in South Africa’s obesity epidemic
- Authors: Otterbach, Steffen , Oskorouchi, Hamid R , Rogan, Michael , Qaim, Matin
- Date: 2021
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478128 , vital:78157 , https://doi.org/10.1016/j.worlddev.2020.105368
- Description: Many developing countries face a rapid increase in overweight and obesity, inasmuch as the prevalence has now nearly converged to levels observed in high-income countries. Among other factors, the rise in obesity is caused by a nutrition transition involving higher affordability and consumption of heavily processed or otherwise unhealthy foods containing high amounts of added sugar, fat, and salt. This development is accompanied by the growing expansion of, and increased access to, large modern food retailers (Big Food) and fast food restaurants. Using a novel methodology, we are able to link proxies of exposure to modern food environments based on Google data with nationally representative micro-level nutrition and health data to examine the influence of Big Food and fast food on overweight and obesity. The micro-level data come from the National Income Dynamics Study (NIDS) in South Africa, a middle-income country with alarming and further rising levels of obesity. We find that proximity to Big Food retailers and fast food restaurants increases overweight and obesity significantly, even after controlling for income and other confounding factors. The results suggest that the shape of food environments needs higher policy attention to promote more healthy food choices, which is true in South Africa and beyond.
- Full Text:
- Date Issued: 2021
A mathematics teacher's response to a dilemma: 'I'm supposed to teach them in English but they don't understand'
- Authors: Robertson, Sally-Ann , Graven, Mellony
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148889 , vital:38783 , https://doi.org/10.4102/sajce.v10i1.800
- Description: English is the dominant language in South African schools although it is the home language for less than 10% of the population. Many schools have yet to embrace the Language in Education Policy’s advocacy of additive bilingualism. This has led to a majority of the country’s children learning and being assessed through a language in which they lack proficiency. This article draws on second language teaching and learning theory to make a case for more systematic support for learners’ second language development and for legitimation of use of home language in mathematics classrooms where a different language is the official medium. The article shares empirical data from a South African Grade 4 mathematics teacher’s classroom to illuminate arguments in favour of additive bilingualism.
- Full Text:
- Date Issued: 2020
A new approach to the biological monitoring of freshwater systems: Mapping nutrient loading in two South African rivers, a case study
- Authors: Motitsoe, Samuel N , Hill, Martin P , Avery, Trevor S , Hill, Jaclyn M
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444480 , vital:74244 , https://doi.org/10.1016/j.watres.2019.115391
- Description: Excessive addition of nitrogen (N) has threatened aquatic ecosystems for decades. Traditional water quality and biological monitoring assessment tools are widely used for monitoring nutrient loads and ecosystem health, but most of these methods cannot distinguish between different types and sources of pollution. This is a challenge, particularly when dealing with non-point sources of anthropogenic nitrogen inputs into freshwater systems. Recent laboratory studies using stable isotopic ratios (δ15N and C/N) of aquatic macrophytes (duckweed: Spirodela spp.) have shown successful differentiation and mapping between different N-sources and further, showed abilities to act as early warning indicators for environmental N-loading. Therefore, the aim of this study was to field test the potential of stable isotopic values of transplanted Spirodela spp. to map temporal and spatial N-loading variation and determine the main sources of N-loading in two river systems in the Eastern Cape Province of South Africa, using previously grown, isotopically calibrated and transplanted Spirodela plants, collected over a 13-month sampling period.
- Full Text:
- Date Issued: 2020
A new genus and three new species of South African Cicadettini (Hemiptera Cicadidae Cicadettinae).
- Authors: Sanborn, Allen F , Villet, Martin H
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/441261 , vital:73871 , https://www.mapress.com/zt/article/view/zootaxa.4885.4.7
- Description: Ingcainyenzane irhiniensis n. gen., n. sp. and Ingcainyenzane nolukhanyoensis n. gen., n. sp. are described from Eastern Cape and Ingcainyenzane umgeniensis n. gen., n. sp. is described from KwaZulu-Natal, South Africa. Notes on its biology of the species and a key to species of the genus are also provided.
- Full Text:
- Date Issued: 2020
Afromelampsalta, a new genus, a new species, and five new combinations of African cicadettine cicadas (Hemiptera: Cicadidae: Cicadettinae):
- Authors: Sanborn, Allen F , Villet, Martin H
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140680 , vital:37909
- Description: Afromelampsalta n. gen. is described for African species currently assigned to the genera Melampsalta Kolenati, 1857. Cicadetta Kolenati, 1857 and Pauropsalta Goding and Froggatt, 1904, and the new species Afromelampsalta luteofasciata n. gen., n. sp. is described. Afromelampsalta aethiopica (Distant, 1905) n. comb., A. cadisia (Walker, 1850) n. comb. and A. leucoptera (Germar, 1830) n. comb. are reassigned from Melampsalta to Afromelampsalta n. gen., A. limitata (Walker, 1852) n. comb. is transferred from Cicadetta Kolenati, 1857 and A. mimica (Distant ,1907) n. comb. is transferred from Pauropsalta Goding and Froggatt, 1904 to Afromelampsalta n. gen. Notes on the biology of the new species, a description of the exuvia of A. mimica n. comb., and a key to the species of African Cicadettini are provided.
- Full Text:
- Date Issued: 2020
An effort to study the influence of tides on the longitudinal variation of vertical E× B drift over the African sector:
- Authors: Habyarimana, Valence , Habarulema, John B , Mungufeni, Patrick , Uwamahoro, Jean C
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/149026 , vital:38797 , https://doi.org/10.1016/j.jastp.2020.105338
- Description: Meteorological processes such as tides influence ionospheric variability through vertical coupling. For the first time, we have used data from Communication Navigation Outage and Forecasting System (C/NOFS) satellite from 2008–2015 to develop a Neural Network (NN) vertical E×B drift model over the African region, with inclusion of a proxy of tides as one of the inputs together with other physical and geophysical inputs. Two models (with and without tidal proxy input) were developed for both East and West African sectors. To derive the tidal proxy, we first calculate the 60-day running means per year which were subtracted from the actual vertical E×B drift measurements to obtain a set of residuals. The purpose of the subtraction was to remove long-term trends in vertical E×B drift that could potentially alias into tides.
- Full Text:
- Date Issued: 2020
Bacterial degradation of coal discard and geologically weathered coal:
- Authors: Olawale, Jacob T , Edeki, Oghenekume G , Cowan, Keith A
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/178694 , vital:40097 , https://doi.org/10.1007/s40789-020-00306-3
- Description: The biodegradation of coal discard is being intensively studied in South Africa in an effort to develop passive methods for the successful revegetation and rehabilitation of waste dumps, to mitigate pollution, and facilitate mine closure. Bacteria were isolated from slurries of coal tailings and diesel-contaminated soil, screened for coal biodegradation competence, characterized, and the colonization and degradation of coal discard and geologically weathered coal investigated using individual isolates and consortia. Ten novel coal-degrading bacterial strains were isolated and characterized, the gene sequences deposited with GenBank, and the (wild-type) strains deposited at Microbial Culture Collection, India.
- Full Text:
- Date Issued: 2020