Food Security In Africa Research Articles

Uncovering endemism in a lake of invasive species introgression.

Species distributions are rapidly being altered by human globalisation and movement. As species are moved across biogeographic boundaries, human-mediated secondary contacts between historically allopatric taxa may promote hybridisation between closely related native and introduced species. The outcomes of hybridisation are diverse from strong reproductive barriers to gene flow to genome-wide admixture that may enhance (Fitzpatrick et al., 2010; Mesgaran et al., 2016; Valencia-Montoya et al., 2020) or impede (Kovach et al., 2016) invasive spread. For native species, introgressive hybridisation may disassemble locally adapted genomes, and in extreme cases, extensive asymmetric introgression may lead to the 'genomic extinction' of endemic diversity (Rhymer & Simberloff, 1996; Todesco et al., 2016). Undoubtedly, introgressive hybridisation can rapidly alter the evolution of introduced and endemic populations. This is a major conservation issue (Leitwein, Duranton, Rougemont, Gagnaire, & Bernatchez, 2020), with the greatest potential consequences on small, range-restricted native populations where introduced species may reach higher relative densities (Currat, Ruedi, Petit, & Excoffier, 2008). In this issue of Molecular Ecology, Blackwell et al. (2020) explore the history of divergence and admixture between the highly invasive Nile tilapia, Oreochromis niloticus, and a recently discovered Oreochromis lineage that is endemic to the coastal lakes of southern Tanzania. Oreochromis tilapias belong to the African cichlids and the most diverse family of vertebrates (Cichlidae), with almost 2000 species inhabiting the Great Lakes and river environments of Eastern Africa (Kocher, 2004; McGee et al., 2020). By analysing previously unrecognised cichlid diversity from southern lakes, Blackwell et al. (2020) provide novel evidence for how introgressive hybridisation with introduced species can alter native genetic makeup, illustrating the potential susceptibility of Tanzania's endemic biodiversity to genetic threats from introduced taxa.

Sowing Seeds of Food Security in Africa

An innovative program focused on collaboration and capacity building is looking to improve outcomes for smallholder farmers, reduce hunger, and alleviate food insecurity in sub-Saharan Africa.

Climate Change: Threat to Agricultural System and Food Security in Africa

Climate change is unequivocal and nothing hides itself from its negative repercussions. Countries in sub-Saharan Africa will continue to be impacted due to their low adaptive capacities and geographic position. Unfavourable weather trends coupled with climatic variations will have adverse effect on agricultural sector which is the main source of livelihood to rural households on the continent. This literature review article assessed the impacts of climate change on agriculture and food security in Africa. The lives of several in Africa cling on agriculture as it supports majority of the population. However, since over 90 percent of agriculture system in the region depends on rainfall, livelihoods of the citizens on the continent have been hit hard due to rising temperature, erratic rainfall and extreme weather conditions.

Food Security for All: Causes and Implications of Food Insecurity in Africa

Food is a basic right of all people, however, food security in Africa is being threatened. The main objective of this article is to uncover the causes and implications of food insecurity in Africa. The information was mainly obtained by reviewing literature with similar topics. Food security and food insecurity are both used to find out if people can or cannot access enough food. Poverty, COVID-19, war and conflict, and climate change have major impacts on food security and this is explored in more detail in this article. Improved food security is very vital for a wider reduction of hunger and helps to overcome undernourishment, malnutrition, domestic violence, and poverty. The causes and implications of food insecurity in Africa need to be addressed to ensure that Africa is freed from hunger.

Does trade protectionism promote domestic food security? Evidence from Tanzanian edible oil imports

As many African countries adopt tariffs and other trade barriers to stem the rising tide of food imports, we ask, when are these policies effective? Our focus is on edible oils, for which African imports grew over 10% per year between 2006 to 2015, and which accounted for 34% of the growth in food imports for the continent over the period — the highest share of any food group. In the same period, several African countries experienced a boom in the local production and processing of oil-seeds. The combination of import growth and domestic production booms points to a gap in the literature on edible oils and food security in Africa. We begin to fill this gap by estimating the price-responses of households, and how they substitute between palm and sunflower oils, using a QUAIDS model on Tanzanian household level data. For Tanzania, the two leading edible oil varieties – imported palm and domestically produced sunflower oil – accounted for more than 70% of edible oil use. We find a surprisingly low level of substitution between domestic and imported edible oils. Simulated budget shares from our estimates suggest that a 10% tariff increase on palm oil leads to less than a 0.06% change in the budget share of sunflower oil. The main implication of our finding is that other policy initiatives are required to stimulate demand for domestic food options that appear to be substitutes for imports, beyond tariffs.

Climate change impacts on household food security and adaptation strategies in southern Ethiopia

AbstractClimate change is predicted to adversely affect agricultural yields, particularly in African countries such as Ethiopia, where crop production relies heavily on environmental factors such as rainfall and temperature. However, there have only been a limited number of studies on the effects of climate change dynamics on food security in Africa, particularly at the household level. We therefore analyzed local climatic changes, the status of household food security, climate‐related causes of food insecurity, food security determinants, and the adaptation strategies of local farmers. Three decades meteorological data were analyzed. A total of 185 farmers were selected using simple random sampling and interviewed, together with focus groups. Data were analyzed using the descriptive and inferential statistics together with the logit regression model. Climate change over the last three decades was found to have a negative impact on the food security status of households. Crop production was constrained by poor rainfall, severe erosion, and increases in temperature. The unpredictability of rainfall, pests, and diseases were also contributing factors. Using the calorie intake approach, 60.5% of sampled respondents were found to be food insecure. Analysis using the logistic regression model showed that age and family size, as well as the amount of cultivated land and rainfall, were the significant (p < .05) factors influencing household food security status. A large proportion (69.8%) of farmers were incorporating adapting strategies into farm management including improved use of crop varieties and livestock production, in addition to income diversification. Taken together, these findings show that improving climate change awareness, facilitating the participation of female‐led households in income generation, and strengthening existing adaptation measures have positive impacts on food security.

Plantations, women, and food security in Africa: Interrogating the investment pathway towards zero hunger in Cameroon and Ghana

In this paper, we critically engage with SDG-2- Target 2.3 and SDG-5 to examine how and why large-scale agricultural land acquisitions modify the social relations of women’s food access. Adopting qualitative methods and from agrarian political economy perspectives, we assess the implications of plantation investments on food security and gender equality in Cameroon and Ghana. The study draws on the impacts of various plantation schemes in Cameroon and Ghana to argue that the current all-encompassing framing of the SDG-2, whereby support for small-scale production appears to co-exist with the promotion of corporate-led agricultural investments, tends to create a vague interpretation of food security, even when capitalist motives override the interests of rural working men and women. In both countries, plantations have been characterised by displacement, reduced food production and competition over land resources in rural contexts where women bear the burden of social reproduction, particularly in subsistence and food provisioning for their households. Restricted access to farmlands hampers petty commodity production, and provokes rural exodus among farming populations in Cameroon who compete with pastoralists for land; and in the Ghana case, where settlers and migrants compete with dispossessed indigenes for arable lands. The study shows the inherent contradictions and tensions within the narratives of sustainable development and projects which are considered as potential pathways to the SDGs. One of such tension areas is between local food security- which is a gendered role for women in West/Central Africa – and the accumulation imperatives of capitalist investors. We iterate that achieving zero hunger requires gender-inclusive land and labour policies that recognise, protect and empower small farmers and women, and create opportunities for local and national food self-sufficiency.

A quick and sensitive diagnostic tool for detection of Maize streak virus

Maize streak virus disease (MSVD), caused by Maize streak virus (MSV; genus Mastrevirus), is one of the most severe and widespread viral diseases that adversely reduces maize yield and threatens food security in Africa. An effective control and management of MSVD requires robust and sensitive diagnostic tests capable of rapid detection of MSV. In this study, a loop-mediated isothermal amplification (LAMP) assay was designed for the specific detection of MSV. This test has shown to be highly specific and reproducible and able to detect MSV in as little as 10 fg/µl of purified genomic DNA obtained from a MSV-infected maize plant, a sensitivity 105 times higher to that obtained with polymerase chain reaction (PCR) in current general use. The high degree of sequence identity between Zambian and other African MSV isolates indicate that this LAMP assay can be used for detecting MSV in maize samples from any region in Africa. Furthermore, this assay can be adopted in minimally equipped laboratories and with potential use in plant clinic laboratories across Africa strengthening diagnostic capacity in countries dealing with MSD.

Designing AfriCultuReS services to support food security in Africa

AbstractEarth observation (EO) data are increasingly being used to monitor vegetation and detect plant growth anomalies due to water stress, drought, or pests, as well as to monitor water availability, weather conditions, disaster risks, land use/land cover changes and to evaluate soil degradation. Satellite data are provided regularly by worldwide organizations, covering a wide variety of spatial, temporal and spectral characteristics. In addition, weather, climate and crop growth models provide early estimates of the expected weather and climatic patterns and yield, which can be improved by fusion with EO data. The AfriCultuReS project is capitalizing on the above to contribute towards an integrated agricultural monitoring and early warning system for Africa, supporting decision‐making in the field of food security. The aim of this article is to present the design of EO services within the project, and how they will support food security in Africa. The services designed cover the users’ requirements related to climate, drought, land, livestock, crops, water, and weather. For each category of services, results from one case study are presented. The services will be distributed to the stakeholders and are expected to provide a continuous monitoring framework for early and accurate assessment of factors affecting food security in Africa.

Challenges of weed management in rice for food security in Africa: A review

Abstract Rice is one of the most important crops for food security in Africa. However, there is a large gap between its present demand and supply. Weed competition is basically one of the major constraints in rice systems in Africa, leading to 48–100% yield reduction and sometimes complete crop failure, thereby threatening food security. Weed control methods currently employed to avoid such losses are predominantly hoe-weeding and herbicide application. Hoe weeding is tedious, inefficient, time consuming, associated with high labour demands and often too expensive for the average farmer to afford. Herbicide use on the other hand, does not provide season-long weed control. Moreover, there are not many herbicides that can control different kinds of weeds with one application. Thus, to optimise yield, financial, social and environmental costs and benefits, integrated and ecological weed management approaches are advocated. Future weed research should therefore be focused on delivering information for the implementation of these approaches. This would require improved knowledge of weed biology and ecology, prioritization of problematic weed species, development of competitive rice cultivars and timely weed control. To address the diversity of weed problems in rice systems in Africa, however, research innovations must take full account of farmer’s local conditions using farmers’ participatory approaches. This review suggests that knowledge-based integrated novel approaches must be developed to assist farmers in coping with the challenges of weed management for sustainable rice production.

Eye-balling and heart girth models for live weight estimation of highly admixed Sudani Shorthorn Zebu Cattle for Precise Production and Veterinary Services

Cattle production is a key pillar of food security in Africa. The majority of African cattle are highly admixed with unknown breed composition. Accurate estimation of the live weight (LW) of these cattle would improve the precision of feeding, veterinary services, and pricing resulting in an improvement in profitability. This study assessed estimating LW of admixed Sudani zebu cattle using eyeballing and heart girth (HG) models. Live weight and HG of 432 Baggara cattle, an admixed Sudani breed, were measured. Three models (a simple linear, a simple linear with box-cox transformed LW, and a quadratic) were generated using 382 heads and validated using 50 heads. A published model (LW (kg) = 3.54*HG (cm) - 322.63) was validated using the data of this study. The error of LW estimation by a breeder and five cattlemen were recorded. All constructed models had high R2 (0.725 - 0.728). However, the 95th percentile of the prediction error of the constructed and published models was higher than 20%. The 95th percentile of LW estimation error of all participants was high (>20%). Accordingly, HG models and eyeballing are not suitable methods to determine the LW of highly admixed zebu cattle for production, veterinary, and marketing purposes as they are prone to a high rate of error.

Enabling trade across borders and food security in Africa

Widespread food insecurity remains a daunting challenge in Africa, despite significant gains in global efforts to eliminate hunger over the last three decades. This paper examines the effects of easing trade across borders – through reductions in documents, time, and costs to export and import – on food security outcomes in Africa. To control for endogeneity, this paper employs the first-difference instrumental variable estimator based on panel data covering 45 African countries over the period 2006–2015. The results reveal that poor trade facilitation constitutes a significant driver of food insecurity in Africa. In particular, ineffective trade facilitation is associated with significant increments in the prevalence of undernourishment and depth of food deficit, as well as reductions in dietary energy supply adequacy and access to sanitation facilities. The results show that food availability and food access are significantly hampered by higher documentation requirements and lengthier export and import times. The results suggest that reductions in delays from documentary and border compliance promise to be the most effective trade facilitation reforms to enhance food security in Africa.

COVID-19 and food security in Africa: Building more resilient food systems.

The COVID-19 pandemic has exposed the fragility of our food systems. Despite increased efficiencies in producing and supplying large volumes of food, our current food systems have generated multiple adverse outcomes comprising high greenhouse gas emissions, persistent hunger, and livelihood stress for farmers around the world. Nowhere else than in Africa have large numbers of people experienced more acutely these adverse shocks emanating from our food systems. Thus, building more resilient African food systems, which take a radical change of direction, is fundamentally a matter of survival. While there is broad consensus around a need for transformational change in food systems, what that entails is not always clear, and there are divergent views amongst experts on how to re-orient research priorities and agricultural solutions in ways that effectively address hunger and inequality while also protecting agrobiodiversity and the environment more broadly. This article engages with this debate and proposes an agricultural research for development agenda in Africa that balances technology transfer with realigning societal values, institutional arrangements, and policy decision-making towards the realization of greater sustainability and inclusive outcomes.

EU Common Agricultural Policy - Impacts on Trade with Africa and African Agricultural Development

The impacts of European agricultural and trade policies on agricultural development and food security in Africa are analyzed in this study. The research is prompted by the pending further development of the Common Agricultural Policy (CAP) after 2020. The proposal for the new CAP is based on higher ambitions with regard to environmental protection and climate change through mandatory ecological programs and an enhanced linkage of direct payments to the greening rules. The methodological approach comprises: (i) an examination and critical review of existing studies; (ii) an analysis and assessment of agricultural trade flows between the EU and Africa as a whole and in the context of case studies on meat and milk; (iii) a systematic consultation of leading experts in European and African agricultural and trade policy on trends and impacts of the CAP; and (iv) model simulations of the effects of possible reform projects on production in and trade flows with Africa. The study finds that direct payments to EU farmers continue to account for up to 50% of total farm income in the EU, but EU spending on agricultural development in Africa is rather small in comparison. The current EU agricultural subsidy policy hampers the development of African agriculture much less than it did before export subsidies and coupled subsidy payments were largely abolished. However, these earlier effects cannot be corrected quickly because agricultural productivity depends on longstanding favorable framework conditions and long-term investments in innovation. According to the expert consultation carried out for this study, a stronger environmental and climate orientation of the CAP is considered likely and would have a dampening effect on European agricultural exports to Africa. The model simulation estimates that European food exports to Africa would decrease under the expected EU policy changes. However, this reduction in European exports would be mainly taken over by other exporters. Investments in African agricultural development should be expanded by the EU. Although African raw agricultural material exports to the EU are largely free of duties, the access of processed products to the EU market is still limited due to complicated rules of origin and social and hygiene standards for goods imported into the EU. These standards are necessary but must be more transparent. The EU should provide more support to improve standards in Africa; otherwise, the export potential of African countries cannot be fully exploited.

Trade in technology: A potential solution to the food security challenges of the 21st century

Abstract The recent rise in caloric undernutrition in Sub-Saharan Africa (SSA) demonstrates the continued relevance of the Malthusian footrace between food availability and population. Sluggish growth in farm productivity in SSA has brought to the fore the key role of agricultural technology in alleviating future food insecurity. We develop a model of technology, food security and international trade with three distinct channels for technology reduce food insecurity in SSA. The first is via greater domestic R&D investment. An alternative is to import technologies from other countries with significant knowledge capital. The third role for technology to resolve the Malthusian dilemma in SSA is that of ‘virtual technology trade’, i.e., importing technological investments undertaken elsewhere through cheaper imported food. To assess the relative contribution of each channel to food security in Africa, we employ a partial equilibrium, quantitative trade model, augmented by a temporal relationship between R&D investments, knowledge capital and agricultural productivity. Over the historical period: 1991-2011 we find that direct R&D investments in SSA have been the dominant vehicle for lowering food prices in Africa. Looking forward to 2050, we find that virtual technology trade will be the most important vehicle for reducing non-farm undernutrition in Africa.

COVID-19 and the state of food security in Africa.

COVID-19 and the state of food security in Africa.

Fermented Edible Insects for Promoting Food Security in Africa.

Efforts to attain sustainable nutritional diets in sub-Saharan Africa (SSA) are still below par. The continent is envisaged to face more impending food crises. This review presents an overview of common edible insects in Africa, their nutritional composition, health benefits and utilization in connection with fermentation to enrich the inherent composition of insect-based products and offer foods related to existing and generally preferred culinary practice. Attempts to explore fermentation treatments involving insects showed fermentation affected secondary metabolites to induce antimicrobial, nutritional and therapeutic properties. Available value-added fermented edible insect products like paste, powder, sauces, and insect containing fermented foods have been developed with potential for more. Novel fermented edible insect-based products could effectively fit in the continent’s food mix and therefore mitigate ongoing food insecurity, as well as to balance nutrition with health risk concerns limiting edible insects’ product acceptability in SSA.

How processing methods affect the microbial community composition in a cereal-based fermented beverage

Traditionally fermented beverages significantly contribute to food security in Africa. The nutritional and sensory quality characteristics of these beverages are closely linked to the different microorganisms they contain. We studied the effect of processing methods on the microbial composition of Munkoyo, a cereal-based fermented beverage, in three Zambian agroecological zones. In Choma, porridge was made from maize grits to which a watery extract from Rhynchosia roots was added as a source of enzymes. In Nyimba, maize meal was used to make porridge, in which Rhynchosia roots were submerged overnight. In Kitwe, porridge from maize meal was cooked until caramelization, followed by submersion of Rhynchosia roots. Irrespective of processing method, final pH was 2.5–3.5, with the lowest value for Nyimba. Presence and abundance of 16S rRNA encoding DNA sequences of the microorganisms showed no clear clustering on basis of the processing method but significantly affected the operational taxonomic unit (OTU) composition (anosim, R3,13 = 0.407, p < 0.05). The average Shannon indices, which indicate ecological diversity, were: Choma 1.14 ± 0.64, Nyimba 1.58 ± 0.23, and Kitwe 1.07 ± 0.95. Consequently, for industrial upscaling and quality standardization, specific combinations of different bacterial species can produce Munkoyo that addresses local consumer preferences.

Molecular identification of diminazene aceturate-resistant strains of Trypanosoma congolense in naturally infected domestic animals of Yoko in the centre region of Cameroon.

African animal trypanosomiases (AAT) remain the major constraint for livestock production, agriculture and food security in Africa. Although several control measures have been developed to fight AAT, the use of trypanocides remains the main strategy in most affected poor and rural communities. However, several studies have highlighted drug-resistant-trypanosome infections in many African countries, though this phenomenon is still not well described. This study aims to detect trypanosome species and the molecular profiles of drug-resistant-trypanosomes in naturally infected domestic animals of Yoko in the centre region of southern Cameroon. Therefore, in October 2017, 348 animals were blood sampled. The level of packed cell volume (PCV) was evaluated in each animal and trypanosome infections were investigated with the capillary tube centrifugation technique (CTC). Thereafter, DNA was extracted from blood samples and different trypanosome species were identified by PCR. The resistant/sensitive molecular profiles of trypanosomes for diminazene aceturate (DA) and isometamidium chloride (ISM) were investigated by PCR-RFLP. About 18.4% (64/348) of animals analyzed by PCR were found with trypanosome infections including Trypanosoma vivax, Trypanosoma brucei s.l. and Trypanosoma congolense forest and savannah. Trypanosoma congolense savannah was the predominant species with an infection rate of 15.2%. Between villages, significant (p˂0.0001) differences were found in the overall trypanosome infection rates. No molecular profile for ISM resistant-trypanosomes was identified. Conversely, about 88.9% (40/45) of T. congolense positive samples have shown molecular profiles of DA-resistant strains while the remaining 11.1% (5/45) showed mixed molecular profiles of resistant/sensitive strains. Results showed that the molecular profiles of DA-resistant strains of T. congolense in domestic animals of Yoko were widespread. This data needs to be confirmed by testing in vivo the drug susceptibilities of the trypanosome strains herein detected. In conclusion, appropriate future control measures are required. In addition to the intensification of vector control, ISM is advised for the treatment of animals infected by trypanosomes.

Physicochemical properties, protein digestibility and thermal stability of processed African mesquite bean (Prosopis africana) flours and protein isolates

The physicochemical, in vitro protein digestibility and thermal properties of dehulled (DPAF) and dehulled–defatted (DDPAF) African mesquite bean (Prosopis africana) flours and protein isolates produced by micellization and isoelectric precipitation were evaluated. Isoelectric precipitation method gave higher yield of protein isolate (30.46%) with higher protein content (81.34%) compared to the micellization which yielded 7.95% and 72.04%, respectively. Significant (p < 0.05) differences occurred among the total colour difference (23.63–53.12), whiteness (40.17–67.78), yellowness (36.81–49.26), browning (− 123.22 to 471.59) and flour colour (26.63–55.04) indexes and functional properties except dispersibility of the samples, indicating the effects of defatting and protein extraction methods. Micellized protein isolate recorded the highest oil (322%), water (300%) absorption and emulsion (64.67%) capacities, while the isoelectric precipitated protein had the highest protein solubility (81.75%). The protein isolates exhibited lower foam stability than the flours with micellized protein being the least. Thermal properties of the flours and protein isolates also varied with defatting and extraction methods. The dehulled P. africana flour and isoelectric precipitated protein showed single endothermic peaks with higher thermal stability compared to the dehulled–defatted flour and micellized protein which had two endothermic peaks. Flours and protein isolates showed in vitro protein digestibility between 76.44 and 80.00%, with micellized protein exhibiting the highest digestibility. Knowledge of the physicochemical properties of P. africana seed products would enhance their utilization in various food formulations, thereby contributing to food security in Africa.