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Browsing by Cluster "Advanced Agriculture & Food"

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Aboveground biomass density models for NASA’s Global Ecosystem Dynamics Investigation (GEDI) lidar mission

Author: Duncanson, L ; Kellner, JR ; Armston, J ; Dubayah, R ; Minora, DM ; Hancock, S ; Healey, SP ; Patterson, PL ; Main, Russell S ; Naidoo, Laven Date: Mar 2022 NASA’s Global Ecosystem Dynamics Investigation (GEDI) is collecting spaceborne full waveform lidar data with a primary science goal of producing accurate estimates of forest aboveground biomass density (AGBD). This paper presents the development ... Read more
The Circular Economy as Development Opportunity: Exploring Circular Economy Opportunities across South Africa’s Economic Sectors

Author: Godfrey, Linda K ; Nahman, Anton ; Oelofse, Suzanna HH ; Trotter, Douglas ; Khan, Sumaya ; Nontso, Zintle ; Magweregwede, Fleckson ; Sereme, Busisiwe V ; Okole, Blessed N ; Gordon, Gregory ER ; Brown, Bernadette ; Pillay, Boyse ; Schoeman, Chanel ; Fazluddin, Shahed ; Ojijo, Vincent O ; Cooper, Antony K ; Kruger, Daniel M ; Napier, Mark ; Mokoena, Refiloe ; Steenkamp, Anton J ; Msimanga, Xolile P ; North, Brian C ; Seetal, Ashwin R ; Mathye, Salamina M Date: Dec 2021 The intention of this book is to present the CSIR’s position and interpretation of the circular economy, and to use it to drive discussions on where immediate circular economy opportunities are achievable in South Africa. Opportunities that ... Read more
Dammarane-type triterpenoids with anti-cancer activity from the leaves of Cleome gynandra

Author: Mzondo, Buntubonke ; Dlamini, Nomusa ; Malan, FP ; Labuschagne, Philip W ; Bovilla, VR ; Madhunapantula, SV ; Maharaj, V Date: Jun 2021 Three dammarane-type triterpernoids including two new ones, cleogynones A and B (1 and 2), were isolated from the leaves of Cleome gynandra. The structures of the new triterpenoids were elucidated by spectroscopic data analysis and confirmed ... Read more
Determining the wetland-dryland boundary of depressions using littoral gradient analysis of soil edaphic factors

Author: Nondlazi, Basanda X ; Cho, Moses A ; Van Deventer, Heidi ; Sieben, EJ Date: Aug 2021 Depressional wetlands are highly vulnerable to changes in land surface temperature and rainfall but little is known about their responses to future climate change. This study assessed the variation in edaphic factors between wetlands and along ... Read more
Distinguishing tree species from in situ hyperspectral and temporal measurements through ensemble statistical learning

Author: Dudeni-Tlhone, Nontembeko ; Mutanga, O ; Debba, Pravesh ; Cho, Moses A Date: Aug 2023 Hyperspectral sensors capture and compute spectral reflectance of objects over many wavelength bands, resulting in a high-dimensional space with enough information to differentiate between spectrally similar objects. Due to the curse of ... Read more
Estimating South African maize biomass using integrated high-resolution UAV and sentinel 1 and 2 datasets

Author: Naidoo, Laven ; Main, Russell S ; Cho, Moses A ; Madonsela, Sabelo ; Majozi, Nobuhle, P Date: Jul 2021 Sentinel-1 and Sentinel-2 have provided consistent hyper-temporal information (5–7 days or earlier) at high spatial resolutions (10m) on biophysical composition, structural and physiological conditions of crops in a variety of environments. ... Read more
Ethnomedicinal and phytochemical properties of sesquiterpene lactones from Dicoma (Asteraceae) and their anticancer pharmacological activities: A review

Author: Mangisa, Mandisa ; Peter, Xolani K ; Khosa, Mbokota ; Fouche, Gerda ; Nthambeleni, Rudzani ; Senabe, Jeremiah V ; Tarirai, C ; Tembu, VJ Date: Sep 2021 Dicoma species belonging to the Asteraceae family are commonly utilized as traditional medicine in Southern Africa. Dicoma anomala, Dicoma capensis, Dicoma schinzii and Dicoma zheyeri are the most common ethnomedicinal plant species used in ... Read more
Exploring the utility of Sentinel-2 for estimating maize chlorophyll content and leaf area index across different growth stages

Author: Madonsela, Sabelo ; Cho, Moses A ; Naidoo, Laven ; Main, Russell S ; Majozi, Nobuhle P Date: Dec 2021 This study investigated the utility of Sentinel-2 spectral data for estimating leaf area index (LAI), leaf and canopy chlorophyll content of maize at different growth stages. Vegetation indices based on the visible-near infrared and red-edge ... Read more
Geospatial analysis of meteorological drought impact on Southern Africa biomes

Author: Cho, Moses A ; Chirwa, PW ; Marumbwa, FM Date: Jan 2021 Within Southern African biomes, droughts are recurrent with devastating impacts on ecological, economic, and human wellbeing. In this context, understanding the drought impact on vegetation is of extreme importance. However, information on ... Read more
In vitro study on efficacy of PHELA, an African traditional drug against SARS-CoV-2

Author: Matsabisa, MG ; Alexandre, Kabamba B ; Ibeji, CU ; Tripathy, S ; Erukainure, OL ; Malatji, Kanyane ; Chauke, Sipho H ; Okole, Blessed N ; Chabalal, HB Date: Jun 2022 In 2019, coronavirus has made the third apparition in the form of SARS-CoV-2, a novel strain of coronavirus that is extremely pathogenic and it uses the same receptor as SARS-CoV, the angiotensin converting enzyme 2 (ACE2). However, more than ... Read more
Indigenous knowledge on the uses, sustainability and conservation of African ginger (Siphonochilus aethiopicus) among two communities in Mpumalanga province, South Africa

Author: Seile, BP ; Bareetseng, Andries S ; Koitsiwe, MT ; Aremu, AO Date: Mar 2022 Harvesting of medicinal plants in the wild has an impact on sustainability of medicinal plants, which leads to the need for intervention in terms of conservation strategies. Siphonochilus aethiopicus, commonly known as African ginger or wild ... Read more
Investigating the relationship between tree species diversity and landsat-8 spectral heterogeneity across multiple phenological stages

Author: Madonsela, Sabelo ; Cho, Moses A ; Ramoelo, Abel ; Mutanga, O Date: Jun 2021 The emergence of the spectral variation hypothesis (SVH) has gained widespread attention in the remote sensing community as a method for deriving biodiversity information from remotely sensed data. SVH states that spectral heterogeneity on ... Read more
Investigating the toxicity of compounds yielded by staphylococci on Vero cells

Author: Modimola, MS ; Green, E ; Njobeh, P ; Senabe, Jeremiah V ; Fouche, G ; McGaw, L ; Nkadimeng, SM ; Mathiba, Kgama ; Mthombeni, J Date: Oct 2022 Bacterial secondary metabolites play a major role in the alleviation of diseases; however, the cytotoxicity of other metabolites cannot be ignored as such metabolites could be detrimental to human cells. Three Staphylococci strains Staphylococcus ... Read more
Land tenure conflict and agribusiness development in sub-Saharan Africa

Author: Effossou, KA ; Cho, Moses A Date: Jun 2021 There is a growing demand of land by multinational commercial agribusinesses to meet the increasing demand for food in sub-Saharan Africa (SSA) and the export market. Land tenure system is identified as one of the factors stymieing the growth ... Read more
Land use induced land cover changes and future scenarios in extent of Miombo woodland and Dambo ecosystems in the Copperbelt province of Zambia

Author: Malunga, MM ; Cho, Moses A ; Chirwa, PW ; Yerokun, OA Date: Aug 2021 The pattern of Miombo woodland conversion to other land uses and the attendant impacts on vital Miombo ecosystems such as dambos is not well understood. Using the Copperbelt province of Zambia as a case study, we assessed the spatio-temporal ... Read more
Predicting land degradation using Sentinel-2 and environmental variables in the Lepellane catchment of the Greater Sekhukhune District, South Africa

Author: Nzuza, P ; Ramoelo, Abel ; Odindi, J ; Mwenge Kahinda, Jean-Marc ; Madonsela, Sabelo Date: Sep 2020 Land degradation is defined as the reduction of biological and economic productivity, which impedes the capacity of the land to provide ecosystem services. There is a need to move towards near real-time monitoring of land degradation using ... Read more
A radar and LiDAR-based earth observation system for monitoring savanna woody structure in southern Africa

Author: Mathieu, Renaud ; Wessels, Konrad ; Main, Russell S ; Naidoo, Laven ; Van der Bergh, Frans ; Erasmus, Barend Date: Apr 2018 In southern Africa, landscapes are dominated by savannas, i.e., mixed tree-grass communities. These savannas are threatened by land clearing and degradation, as well as the densification of woody plants, a process known as bush encroachment. ... Read more
Spatio-temporal analysis of built-up impervious surface area and interplay with land surface temperature in Pretoria, South Africa

Author: Adeyemi, A ; Ramoelo, Abel ; Cho, Moses A ; Strydom, J Date: Sep 2021 Evaluating changes in built-up impervious surface area (ISA) to understand the urban heat island (UHI) extent is valuable for governments in major cities in developing countries experiencing rapid urbanization and industrialization. This work ... Read more
Spectral index to improve the extraction of built-up area from WorldView-2 imagery

Author: Adeyemi, A ; Ramoelo, Abel ; Cho, Moses A ; Masemola, C Date: Apr 2021 Globally, the unprecedented increase in population in many cities has led to rapid changes in urban landscape, which requires timely assessments and monitoring. Accurate determination of built-up information is vital for urban planning and ... Read more
Towards sustainable energy system options for improving energy access in Southern Africa

Author: Tazvinga, Tenerica ; Dzobo, O ; Mapako, Maxwell C Date: May 2020 Access to modern energy services is one of the pre-requisites to improved livelihood, yet the poor, particularly in developing countries, remain tied to unhealthy and inefficient traditional fuels. Renewable energy technologies are increasingly ... Read more

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