Food Security最新文献

Rapid urbanisation in low- and middle-income countries, which has encroached on agricultural lands but has not been consistently accompanied by corresponding improvements in water and sanitation services, has raised questions about its impact on the food and nutrition security of households living in transitional, peri-urban areas. Through an analysis of survey data collected from 518 households living around the town of Eldoret, Kenya, we investigate the existing links between peri-urban households’ engagement in agriculture, their dietary behaviour, and their children’s nutrition outcomes. We find that peri-urban households engaged in agriculture, particularly in crop growing and in the sales of their agricultural produce, have more diverse and nutritious diets than agriculturally non-engaged households, all other things being equal. However, a significant improvement in children’s health outcomes is observed in these households only when coupled with improved water, sanitation, and hygiene conditions.

There is growing recognition that global food system transformation requires a fundamental shift in norms, perspectives and structural inclusion and exclusion of different actors in decision-making spaces. As multistakeholder governance approaches become increasingly common, significant concerns have been raised about their ability to deliver such change. Such concerns are based on case study findings repeatedly highlighting their susceptibility to corporate capture. This study goes beyond individual case studies, examining global multi-stakeholder initiatives (MSIs) whose stated aim is to drive a healthier and more sustainable food system. It identified and categorised actors within these MSIs, drawing on social network analysis to provide insights into actor centrality, power structures, and how this might impact MSIs’ potential to drive transformative change. Thirty global MSIs were included in our sample, including a total of 813 actors. Most actors were based in high-income countries (HIC) (n = 548, 67%). The private sector (n = 365, 45%) was the most represented actor category, comprising transnational corporations (TNCs) (n = 127) and numerous others representing their interests. NGOs, affected communities and low- and middle-income country actors remain underrepresented. The central involvement of TNCs which rely on the production and sale of unhealthy and unsustainable commodities represents a clear conflict of interest to the stated objectives of the MSIs. These findings lend weight to concerns that MSIs may reflect rather than challenge existing power structures, thus serving to maintain the status quo. This indicates a need to critically examine the use of multistakeholder governance approaches and their ability to drive global food system transformation.

Human Zn and Fe deficiencies can be reduced through agronomic biofortification, but information on factors influencing maize grain-Zn and -Fe levels remain scanty. This analysis: (1) Establishes the global distribution of Zn and Fe concentrations in maize grain; (2) assess the contribution of different agronomic practices to the effectiveness of Zn fertilizers for increasing grain yields, and Zn and Fe levels in maize grain; and (3) identify key biophysical factors and metrics to more effectively guide agronomic biofortification of Zn. Using 5874 data points in 138 published papers from 34 countries, we estimated a 7.5% probability of grain-Zn concentrations exceeding the benchmark target of 38 mg kg⁻¹. Using 3187 data points from 65 studies across 27 countries we estimated a 8.5% probability of grain-Fe concentrations exceeding the target of 60 mg kg⁻¹. Our 70-paper meta-analysis revealed that applying Zn and/or Fe in combination with inorganic NPK fertilizer can increase maize-grain-Zn and-Fe concentrations by 31% (p < 0.01) relative to the control (NPK only). In 52% and 37.5% of the studies respectively, grain-Zn and -Fe levels showed significant and concomitant increase with grain-yield increases. Soil organic matter, pH, soil-available Zn, organic input applications, and N, Zn and Fe application rates and methods were among the key factors influencing grain Zn and Fe. We conclude there is substantial room for increasing maize-grain Zn and Fe concentrations, and applying Zn, especially in combined soil and foliar applications, gives substantial increases in grain-Zn and -Fe concentrations. This global review reveals large data gaps on maize-grain nutrient levels, and we call for routine collection of such information in future research.

Forests can help rural households cope with food insecurity challenges in the face of climate change while also sequestering carbon and advancing other sustainability objectives in low- and middle-income countries (LMICs). As such, participation in the forestry sector can contribute to achieving the Sustainable Development Goals (SDGs), especially on hunger and food security (SDG 2) in forest rich, but economically poor areas of LMICs. However, analysis of the effects of forest sector participation on food security in such contexts remain limited. Here we estimate the effects of participation in forest-based activities like collection and processing of timber and non-timber forest products (NTFPs) on household food security in Liberia, the most forested country in West Africa. We applied endogenous switching poisson regression to data from 1408 households living in the proximity of forests included in Liberia’s 2019 national household forest survey to estimate the effect of forest sector participation on food security (in terms of reduction in the number of months households reportedly had insufficient food). Results show that forest-sector participation reduced the number of months households had insufficient food by 84% (about 2.7 months). Heterogeneity analyses show that NTFPs affected food security by 80% (about 2.5 months) compared to timber and wood products, which had a 66% effect size (about 2.1 months) on average. Our results provide new, national-scale evidence on the role of forests in enhancing food security in Liberia and suggest the importance of forest sector participation for food security and achieving SDG 2 more generally.

We studied the causal link between forage condition and food security in northern Kenya and southern Ethiopia and probed the mechanisms through which the effects occur. The study utilized weekly panel survey data collected over a period of 94 weeks (March 2021–December 2022) from drought-prone pastoral regions and estimated two-stage least squares instrumental variables regression to assess causal impacts. We found that an increase in the normalized difference vegetation index (NDVI) – our proxy for forage condition – by 10% significantly reduced the likelihood of a household experiencing food insecurity by 12 percentage points. The main mechanisms through which improved forage condition increased food security were livestock productivity enhancement, reduced prices of basic food commodities (cereals, legumes, and vegetables), and utilization of better coping strategies by households. These findings suggest the need for interventions and initiatives aimed at boosting livestock productivity and reducing vulnerability to drought-induced poor forage conditions. Efforts focused on the monitoring of forage conditions and supporting market development for livestock feed are important for addressing the adverse impacts of drought and deteriorating forage conditions in the horn of Africa. Furthermore, the monitoring of drought conditions and shocks using high-frequency data has the potential for providing early warning and informing anticipatory action.

Food insecurity is a pressing issue facing our world, particularly affecting coastal communities who rely on marine resources. The problem is further compounded by the rapidly changing climate, a deteriorating environment and growing human populations. It is essential to evaluate this issue accurately to reduce risk and improve the situation of coastal communities, especially in countries with less socioeconomic development. To this end, we develop a food security social-ecological risk assessment framework for developing communities in coastal areas of the Western Indian Ocean facing a changing environment. The framework integrates local ecological knowledge, expert scientific opinion, survey data, and satellite sea surface temperature (SST) and chlorophyll-a observation. We conducted a local-scale case study in four regions in Tanzania; Mafia, Pemba, Tanga, and Unguja, revealing that they face moderate to high risk levels of food insecurity. The highest risk was observed in the island communities of Pemba and Unguja, while the communities of Mafia and Tanga had the lowest risk due to lower exposure and sensitivity to climate change. Our results show that recognizing the key differences across risk components is crucial in identifying effective intervention strategies for local practitioners. This study highlights the need for detailed assessments to provide accurate information on local-scale food security dynamics, specifically when assessing impacts induced by environmental and climatic changes.

National lockdowns and containment measures to control the spread of COVID-19 led to increased unemployment, lower household incomes and reduced access to affordable and nutritious foods globally. This study aimed to examine changes and correlates of household food insecurity experience and mitigation strategies adopted in peri-urban Peru during the COVID-19 pandemic. Low income households with children age < 2 years in Lima and Huánuco participated in three repeated cross-sectional surveys from 2020 to 2022 (n = 759). We assessed changes in household food insecurity experience using the Food Insecurity Experience Scale. Correlates of moderate-severe food insecurity were analysed using univariate and multivariable linear mixed-effect regressions. We also assessed perceived impacts of the pandemic on livelihoods, coping strategies and receipt of financial or food assistance. Moderate-severe food insecurity was 47.0% in 2020 (survey 1) decreasing to 31.1% in 2022 (survey 3). In adjusted analyses, food insecurity was higher in households with perceived reduced income (β = 12.69 [6.82; 18.56]); in the lower socio-economic status (SES) tertiles (compared to the relatively highest SES tertile; middle tertile (β = 20.91 [9.89; 31.93]), lowest tertile (β = 39.37 [28.35; 50.40]); in households with ≥ 2 children < 5 years (β = 8.78 [2.05; 15.50]); and in Lima (compared to Huánuco; β = 10.47 [1.27; 19.67]). Food insecurity improved more among the relatively lowest SES compared to the relatively highest SES households between survey 1 and 3 (interaction p = 0.007). In conclusion, almost half of households experienced moderate-severe food insecurity mid-pandemic with greater risk observed in the most socio-economically disadvantaged households. The inequality gap in food insecurity associated with SES narrowed over time likely due to household coping strategies and reduced poverty.

Food loss and waste are global problems for food security, as one-third of all food produced globally does not reach the consumer’s table. These numbers seem unreasonable when the data presented by the Food and Agriculture Organization of the United Nations (FAO) in 2021 accounts for more than 800 million undernourished people and about 2.3 billion without access to adequate food throughout the year. This study examines the determinants of food waste behavior at the consumer level in China, the most populous country in the world. The survey used data from 3,857 online questionnaires of families living in selected Chinese metropolitan areas across all provinces. The research methodology used an ordered multinomial logit model to estimate the impact of the explanatory variables on the frequency and amount of household food waste. The results showed that food waste increased with income, age, and education but at a decreasing rate. Additionally, the demographic characteristics of households, food planning, and meal preparation had a statistically significant influence on food waste. The findings of this study, therefore, provide evidence that household food waste is highly dependent on people's behavior, and its reduction may depend on public policies and educational campaigns to make families aware of the problem.

This article looks into the daily food shopping practices of poor urban households in Dhaka, Bangladesh. A practice theory-based approach is used to explore their coping strategies in response to food safety concerns. By applying an exploratory sequential mixed-method approach, two groups of shoppers are compared: recently arrived migrants and established residents, as recently arrived migrants are expected to face an unfamiliar food shopping environment and therefore need to reconsider their daily food shopping practices. The results describe the elements of food shopping practices: food items, retail outlets, affordability, social networks, and relations to work. We identified the absence of freshness, undesirable substances, and the need for more information about the production process as the primary food safety concerns. Among both shopper groups, the harmful consequence of applying the chemical 'formalin' to food is considered the most prominent food safety concern. Major coping strategies include identifying (un)safe food, proactive selection, and establishing and maintaining social relationships. The two groups have similarities and differences in using skills and competencies to mitigate their food safety concerns in everyday shopping practices. Recently arrived migrants have to adapt to urban lifestyles and reconfigure their food safety concerns into their daily food shopping practices.