72 research outputs found
A small subset of protected areas are a highly significant source of carbon emissions
Protected areas (PAs) aim to protect multiple ecosystem services. However, not all are well protected. For the first time, using published carbon and forest loss maps, we estimate carbon emissions in large forest PAs in tropical countries (N = 2018). We found 36 ± 16 Pg C stored in PA trees, representing 14.5% of all tropical forest biomass carbon. However the PAs lost forest at a mean rate of 0.18% yr(−1) from 2000–2012. Lower protection status areas experienced higher forest losses (e.g. 0.39% yr(−1) in IUCN cat III), yet even highest status areas lost 0.13% yr(−1) (IUCN Cat I). Emissions were not evenly distributed: 80% of emissions derived from 8.3% of PAs (112 ± 49.5 Tg CO(2) yr(−1); n = 171). Unsurprisingly the largest emissions derived from PAs that started with the greatest total forest area; accounting for starting forest area and relating that to carbon lost using a linear model (r(2) = 0.41), we found 1.1% outlying PAs (residuals >2σ; N = 23), representing 1.3% of the total PA forest area, yet causing 27.3% of all PA emissions. These results suggest PAs have been a successful means of protecting biomass carbon, yet a subset causing a disproportionately high share of emissions should be an urgent priority for management interventions
Combining remote sensing and household level data for regional scale analysis of land cover change in the Brazilian Amazon
Land cover change in the Brazilian Amazon depends on the spatial variability of political, socioeconomic and biophysical factors, as well as on the land use history and its actors. A regional scale analysis was made in Rondônia State to identify possible differences in land cover change connected to spatial policies of land occupation, size and year of establishment of properties, accessibility measures and soil fertility. The analysis was made based on remote sensing data and household level data gathered with a questionnaire. Both types of analyses indicate that the highest level of total deforestation is found inside agrarian projects, especially in those established more than 20 years ago. Even though deforestation rates are similar inside and outside official settlements, inside agrarian projects forest depletion can exceed 50% at the property level within 10–14 years after establishment. The data indicate that both small-scale and medium to large-scale farmers contribute to deforestation processes in Rondônia State encouraged by spatial policies of land occupation, which provide better accessibility to forest fringes where soil fertility and forest resources are important determinants of location choic
Household and community socioeconomic and environmental determinants of child nutritional status in Cameroon
BACKGROUND: Undernutrition is a leading cause of child mortality in developing countries, especially in sub-Saharan Africa. We examine the household and community level socioeconomic and environmental factors associated with child nutritional status in Cameroon, and changes in the effects of these factors during the 1990s economic crisis. We further consider age-specific effects of household economic status on child nutrition. METHODS: Child nutritional status was measured by weight-for-age (WAZ) and height-for-age (HAZ) z-scores. Data were from Demographic and Health Surveys conducted in 1991 and 1998. We used analysis of variance to assess the bivariate association between the explanatory factors and nutritional status. Multivariate, multilevel analyses were undertaken to estimate the net effects of both household and community factors. RESULTS: Average WAZ and HAZ declined respectively from -0.70 standard deviations (SD), i.e. 0.70 SD below the reference median, to -0.83 SD (p = 0.006) and from -1.03 SD to -1.14 SD (p = 0.026) between 1991 and 1998. These declines occurred mostly among boys, children over 12 months of age, and those of low socioeconomic status. Maternal education and maternal health seeking behavior were associated with better child nutrition. Household economic status had an overall positive effect that increased during the crisis, but it had little effect in children under 6 months of age. Improved household (water, sanitation and cooking fuel) and community environment had positive effects. Children living in the driest regions of the country were consistently worst off, and those in the largest cities were best off. CONCLUSION: Both household and community factors have significant impact on child health in Cameroon. Understanding these relationships can facilitate design of age- and community-specific intervention programs
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COVID-19, systemic crisis, and possible implications for the wild meat trade in sub-Saharan Africa
Wild animals play an integral and complex role in the economies and ecologies of many
countries across the globe, including those of West and Central Africa, the focus of this
policy perspective. The trade in wild meat, and its role in diets, have been brought into
focus as a consequence of discussions over the origins of COVID-19. As a result, there
have been calls for the closure of China’s “wet markets”; greater scrutiny of the wildlife
trade in general; and a spotlight has been placed on the potential risks posed by growing human populations and shrinking natural habitats for animal to human transmission of
zoonotic diseases. However, to date there has been little attention given to what the consequences of the COVID-19 economic shock may be for the wildlife trade; the people who
rely on it for their livelihoods; and the wildlife that is exploited. In this policy perspective,
we argue that the links between the COVID-19 pandemic, rural livelihoods and wildlife
are likely to be more complex, more nuanced, and more far-reaching, than is represented in
the literature to date. We develop a causal model that tracks the likely implications for the
wild meat trade of the systemic crisis triggered by COVID-19. We focus on the resulting
economic shockwave, as manifested in the collapse in global demand for commodities such
as oil, and international tourism services, and what this may mean for local African economies and livelihoods. We trace the shockwave through to the consequences for the use
of, and demand for, wild meats as households respond to these changes. We suggest that
understanding and predicting the complex dynamics of wild meat use requires increased
collaboration between environmental and resource economics and the ecological and conservation sciences
Payment for ecosystem services in the Congo basin : filling the gap between law and sustainability for an optimal preservation of ecosystem services
The Democratic Republic of Congo (DRC) is involved in the implementation of an international Payment for Ecosystem Services (PES) (UNEP: Developing international payments for environmental services: a technical discussion (Background Paper), 2006) mechanism, namely “Reduced Emissions from Deforestation and forest Degradation in the developing countries and the conservation, sustainable forest management and the enhancement of forest carbon stocks in the developing countries” (REDD+). However, the laws of the DRC are insufficient to achieve a sustainable PES and REDD+ implementation. Based on indicators on land tenure security, classical conditions of contracts, 3E+ REDD+ criteria and measures on conservation and restoration, this chapter analyses the laws related to PES in force in the DRC in order to obtain a more sustainable preservation of ecosystem services. The chapter focuses on four ecosystem services: carbon sequestration and storage, biodiversity protection, watershed protection and landscape beauty. Several criteria have been applied to assess the potential of the DRC PES laws to promote a sustainable preservation of ecosystems and ecosystem services. A first set of well-known criteria are the 3 E+ REDD+ criteria, which entails that to achieve a successful REDD+ implementation, the REDD+ project should be effective, costly efficient, equitable and bring co-benefits. Effectiveness refers to the achievement of environmental goals. Cost efficiency means that the project should attempt to reach the environmental goals through reasonable financial means. Equity fits with the inclusive capacity of the project. Four co-benefits are distinguished, namely biodiversity conservation, governance, adaptation of climate change and improvement of social conditions. Secondly, this chapter refers to classical contract conditions from French and Belgian Civil Law inherited by Congolese Civil Law. These conditions are the consent of the parties, the capacity of parties, the existence of an object and the legal purpose. Thirdly, the chapter refers to the indicators on conservation and restoration measures and on land tenure security (property right titles and clear borders). The chapter demonstrates that there is a need to update or enforce the existing laws related to PES applied in the DRC in order to increase the preservation of ecosystem services. The chapter argues that the transformation of the existing laws would positively influence the implementation of SDG 13 and 15
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