| 1. |
- Abdi, Hakim, et al.
(författare)
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The El Niño – La Niña cycle and recent trends in supply and demand of net primary productivity in African drylands
- 2016
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Ingår i: Climatic Change. - : Springer Science and Business Media LLC. - 0165-0009 .- 1573-1480. ; 138:1, s. 111-125
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Tidskriftsartikel (refereegranskat)abstract
- Inter-annual climatic variability over a large portion of sub-Saharan Africa is under the influence of the El Niño-Southern Oscillation (ENSO). Extreme variability in climate is a threat to rural livelihoods in sub-Saharan Africa, yet the role of ENSO in the balance between supply and demand of net primary productivity (NPP) over this region is unclear. Here, we analyze the impact of ENSO on this balance in a spatially explicit framework using gridded population data from the WorldPop project, satellite-derived data on NPP supply, and statistical data from the United Nations. Our analyses demonstrate that between 2000 and 2013 fluctuations in the supply of NPP associated with moderate ENSO events average ± 2.8 g C m−2 yr.−1 across sub-Saharan drylands. The greatest sensitivity is in arid Southern Africa where a + 1 °C change in the Niño-3.4 sea surface temperature index is associated with a mean change in NPP supply of −6.6 g C m−2 yr.−1. Concurrently, the population-driven trend in NPP demand averages 3.5 g C m−2 yr.−1 over the entire region with densely populated urban areas exhibiting the highest mean demand for NPP. Our findings highlight the importance of accounting for the role ENSO plays in modulating the balance between supply and demand of NPP in sub-Saharan drylands. An important implication of these findings is that increase in NPP demand for socio-economic metabolism must be taken into account within the context of climate-modulated supply.
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| 2. |
- Armah, Frederick Ato, et al.
(författare)
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Analyzing the Relationship between Objective-Subjective Health Status and Public Perception of Climate Change as a Human Health Risk in Coastal Tanzania
- 2015
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Ingår i: Human and Ecological Risk Assessment. - : Informa UK Limited. - 1080-7039 .- 1549-7860. ; 21:7, s. 1936-1959
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Tidskriftsartikel (refereegranskat)abstract
- Climate change is considered as the biggest threat to human health in the 21st century. Sub-Saharan Africa, which is the most-at-risk region of the world, is estimated to have a disproportionately large share of the burden of climate change-induced environmental and human health risks. To develop effective adaptations to protect public health, it is essential to consider how individuals perceive and understand the risks, and how they might be willing to change their behaviors in response to them. Using a cross-sectional survey of 1253 individuals in coastal Tanzania we analyzed the relationship between subjective health status (self-reported health) and objective health status on the one hand and perceived health risks of climate change. Generally, higher subjective health status was associated with lower scores on perceived health risks of climate change. Concerning objective health status, the results were varied. Individuals who affirmed that they had been previously diagnosed with hepatitis, skin conditions, or tuberculosis had lower scores on perceived health risks of climate change, unlike their counterparts who affirmed that they had been previously diagnosed with malaria in the past 12 months or had been diagnosed with HIV/AIDS. These relationships persist even when biosocial and sociocultural attributes are taken into consideration. The results underscore the complex ways in which objective and subjective health interact with both biosocial and sociocultural factors to shape perceived health risks of climate change.
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| 3. |
- Armah, Frederick Ato, et al.
(författare)
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Monitored versus experience-based perceptions of environmental change: evidence from coastal Tanzania
- 2015
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Ingår i: Journal of Integrative Environmental Sciences. - 1943-8168. ; 12:2, s. 119-152
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Tidskriftsartikel (refereegranskat)abstract
- The impacts of climate change are likely to exacerbate many problems that coastal areas already face. In this study, we used multinomial logistic regression to examine human perception of climate change based on a cross-sectional survey of 1253 individuals in coastal regions of Tanzania. This was complemented with time series analysis of 50-year meteorological data. The results indicate that self-rated ability to handle work pressure, self-rated ability to handle personal pressure and unexpected difficulties, age, region and educational status were significant predictors of perceived temperature change unlike ethnicity and gender. A disproportionately large percentage of respondents of all ages indicated that temperature was getting hotter between the past 10 and 30 years. This observation was supported by the time series analysis. Although respondents also alluded to changes in rainfall patterns in the past 10-30 years, time series analysis of rainfall revealed a different scenario except for Mtwara region of Tanzania. Because there is agreement between respondents' perceptions of temperature and available scientific climatic evidence over the 50-year period, this study argues that when meteorological records are incomplete or unavailable, local perceptions of climatic changes can be used to complement scientific climatic evidence. Based on the spatial differentials in climate change perception observed in this study, there is opportunity for a more locally oriented adaptation dimension to climate policy integration, which has hitherto been underserved by both academics and policymakers.
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| 4. |
- Tambang, Yengoh Genesis, et al.
(författare)
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Effects of Large-Scale Acquisition on Food Insecurity in Sierra Leone
- 2015
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Ingår i: Sustainability. - : MDPI AG. - 2071-1050. ; 7:7, s. 9505-9539
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Tidskriftsartikel (refereegranskat)abstract
- The recent phenomenon of large-scale acquisition of land for a variety of investment purposes has raised deep concerns over the food security, livelihood and socio-economic development of communities in many regions of the developing world. This study set out to investigate the food security outcomes of land acquisitions in northern Sierra Leone. Using a mixture of quantitative and qualitative research methods, the study measures the severity of food insecurity and hunger, compares the situation of food security before and after the onset of operations of a land investing company, analyzes the food security implications of producing own food versus depending on wage labour for household food needs, and evaluates initiatives put in place by the land investing company to mitigate its food insecurity footprint. Results show an increase in the severity of food insecurity and hunger. Household income from agricultural production has fallen. Employment by the land investing company is limited in terms of the number of people it employs relative to the population of communities in which it operates. Also, wages from employment by the company cannot meet the staple food needs of its employees. The programme that has been put in place by the company to mitigate its food insecurity footprint is failing because of a host of reasons that relate to organization and power relations. In conclusion, rural people are better off producing their own food than depending on the corporate structure of land investment companies. Governments should provide an enabling framework to accommodate this food security need, both in land investment operations that are ongoing and in those that are yet to operate.
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| 5. |
- Tambang, Yengoh Genesis, et al.
(författare)
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Factors of vulnerability: How large-scale land acquisitions take advantage of local and national weaknesses in Sierra Leone
- 2016
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Ingår i: Land Use Policy. - : Elsevier BV. - 0264-8377. ; 50, s. 328-340
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Tidskriftsartikel (refereegranskat)abstract
- Enticing economic benefits for host nations and the notion of large areas of land considered available are often put forward as the main reasons for large-scale land acquisition in many areas of sub-Saharan Africa. However, country-level datasets of land acquisitions seem to indicate a clear divide between a majority of countries engaged in land acquisitions as investors and those involved as targets. We posit that there are socio-economic and governance factors that make the engagement between targets of land acquisitions and investors both unequal and attractive to large-scale investments. We then ask the question: what are the factors that make communities vulnerable to an unequal engagement with large-scale land-investing interests in Sierra Leone? We explore this question using local-level socio-economic data of households and communities in two settings where land acquisitions have occurred in Sierra Leone. We find that socio-economic characteristics of local populations, such as levels of education, the powerful role of traditional chiefs and corruption, make these areas easier targets for such land investments. Investors also exploit the poor economic situation of local areas by making alluring promises of development opportunities. The vulnerability of local people to land investors is further undermined by poor governance at the national level and external politico-financial interest in favor of such investments. Local populations are vulnerable to organized campaigns of land acquisitions by multi-national companies. Proper legal and institutional frameworks are required to protect local interests in these land deals. (C) 2015 Elsevier Ltd. All rights reserved.
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| 6. |
- Yengoh, Genesis Tambang, et al.
(författare)
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Floods in the Douala metropolis, Cameroon : attribution to changes in rainfall characteristics or planning failures?
- 2017
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Ingår i: Journal of Environmental Planning and Management. - : Informa UK Limited. - 0964-0568 .- 1360-0559. ; 60:2, s. 204-230
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Tidskriftsartikel (refereegranskat)abstract
- With urban populations worldwide expected to witness substantial growth over the next decades, pressure on urban land and resources is projected to increase in response. For policy-makers to adequately meet the challenges brought about by changes in the dynamics of urban areas, it is important to clearly identify and communicate their causes. Floods in Douala (the most densely populated city in the central African sub-region), are being associated chiefly with changing rainfall patterns, resulting from climate change in major policy circles. We investigate this contention using statistical analysis of daily rainfall time-series data covering the period 1951–2008, and tools of geographic information systems. Using attributes such as rainfall anomalies, trends in the rainfall time series, daily rainfall maxima and rainfall intensity–duration–frequency, we find no explanation for the attribution of an increase in the occurrences and severity of floods to changing rainfall patterns. The culprit seems to be the massive increase in the population of Douala, in association with poor planning and investment in the city's infrastructure. These demographic changes and poor planning have occurred within a physical geography setting that is conducive for the inducement of floods. Failed urban planning in Cameroon since independence set the city up for a flood-prone land colonization. This today translates to a situation in which large portions of the city's surface area and the populations they harbor are vulnerable to the city's habitual annual floods. While climate change stands to render the city even more vulnerable to floods, there is no evidence that current floods can be attributed to the changes in patterns of rainfall being reported in policy and news domains.
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| 7. |
- Yengoh, Genesis Tambang, et al.
(författare)
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Land access constraints for communities affected by large-scale land acquisition in Southern Sierra Leone
- 2016
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Ingår i: GeoJournal. - : Springer Science and Business Media LLC. - 0343-2521 .- 1572-9893. ; 81:1, s. 103-122
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Tidskriftsartikel (refereegranskat)abstract
- While national figures of land availability are used to justify accepting large-scale land investors, not very much is known about the local level realities of land availability. By combining remotely sensed data with fieldwork, system dynamics modelling and qualitative research methods, we examine local level realities of land use and availability in the Malen Chiefdom of Southern Sierra Leone. Here, local communities are experiencing the outcomes of large-scale investments in oil palm for biodiesel and other industrial purposes by the SOCFIN Agricultural Company. We find that beyond agricultural production, there are other land uses that are vital for the socio-cultural, economic and environmental realities of communities. The Company does not respect engagements promised to local people to set aside buffer zones around living areas to serve as biodiversity corridors. Local communities are severely deprived of agricultural land and other land resources. The operations of SOCFIN do not take account of present or future land needs of local people. A baseline requirement of food crop land should be set aside for each community, to ensure the attainment of food security in communities affected by land acquisitions. Such baseline requirement should be augmented with local level needs assessments to meet new demand for cropland necessitated by changing demography. This model of land planning can be applied to other land use and additional engagements of large-scale land investors.
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| 8. |
- Yengoh, Genesis Tambang, et al.
(författare)
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Women’s Bigger Burden : Disparities in Outcomes of Large Scale Land Acquisition in Sierra Leone
- 2015
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Ingår i: Gender Issues. - : Springer Science and Business Media LLC. - 1098-092X .- 1936-4717. ; 32:4, s. 221-244
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Tidskriftsartikel (refereegranskat)abstract
- Women farmers make up a majority of small-scale food producers in sub-Saharan Africa. Despite their important role in the food and livelihood security of their households and communities, women continue to face substantial challenges in their rights of and access to land resources in the region. In a number of countries such as Sierra Leone where large-scale land acquisition is ongoing, we posit that women’s predicament may further deteriorate. Using data drawn from a survey of household and livelihood activities, focus groups and interviews we examine the outcomes of large-scale land acquisitions on women at the local level in two districts in Sierra Leone. We found that first, women depend more on land-based natural resources that directly affect the day-to-day welfare of households (such as firewood and medicinal plants) than men. Second, land acquisitions have led to a significant fall in the incomes of women and men. The effects of the fall of women’s income have more direct and profound consequences on household wellbeing compared with men. Third, men tend to rank the effects of land acquisitions on women lower than women do. We conclude that current social and cultural norms and women’s role in rural societies is complex and predisposes women to negative livelihood processes and outcomes associated with large-scale land acquisitions. Policy interventions designed to address local and national challenges to socio-economic and cultural development should recognize the crucial role played by women and be responsive to their special needs.
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