Agricultural diversity is one of the bases of traditional agroecosystems, having great environmental and cultural importance. The current loss of agricultural diversity is causing serious concern, ...mainly because of its essential role in supporting global and local food security. Stopping this loss requires a better understanding of how diversity is managed locally and what mechanisms sustain agricultural diversity. Here we propose a generalist agent-based model that couples biological, cultural, and social dynamics to obtain varietal diversity as an emergent phenomenon at the community level. With a mechanistic approach, we explore how four of the model dynamics can shape systems diversity. To validate the model, we performed a bibliographic review on Manihot esculenta and Zea mays case studies. The model yielded compatible results for manioc and maize varietal richness at both community and household levels.
Bushmeat consumption persists in urban areas in the Neotropics, yet knowledge of its scale and the relative importance of cultural and economic factors in determining consumption and preference ...remain elusive. Moreover, the roles of cultural beliefs, social norms, and attitudes in driving urban bushmeat consumption are rarely evaluated. Therefore, we explored in this article the factors that influence consumption and preference for bushmeat in Amazonian towns. Given the availability of other sources of animal protein and the cultural and social importance of bushmeat in the region, we hypothesized that cultural attributes should be better predictors than economic factors of bushmeat consumption and preference. Data analysis involved fitting two-level mixed-effects regressions (random intercepts) to a structured sample of 227 individuals (99 households) from four towns in the Brazilian (Tabatinga and Atalaia do Norte) and Colombian (Leticia and Puerto Nariño) Amazon. The results indicate that a third of the interviewees had consumed bushmeat in the past month, which had primarily been harvested by the family or received as a gift rather than obtained through trade. In general, both economic and cultural factors predicted bushmeat consumption and preference, but the objective proxy for culture, individual origin, was unimportant. Among the tested indicators, the strongest predictor was the importance of bushmeat to social relations. Moreover, informal social norms, such as the greater importance attributed to taboos, tended to decrease the average number of wild species that a person would eat, whereas attitudes toward the illegality of hunting were less important. The two economic indicators, increased income and wealth, tended to decrease preference for bushmeat and the likelihood of consumption. Our findings highlight the importance of human beliefs, attitudes, and social norms to the understanding of bushmeat consumption and preference and may contribute to the design of more effective and locally appropriate conservation and management strategies.
Beyond protein intake Sarti, Flavia M.; Adams, Cristina; Morsello, Carla ...
Ecology and society,
01/2015, Letnik:
20, Številka:
4
Journal Article
Recenzirano
Odprti dostop
Wild meat is critical for the food security and income of millions of people, especially for poor rural households. Its role as a primary source of macronutrients worldwide has been recognized, but ...there have been few attempts to evaluate the contribution of bushmeat consumption to micronutrient intake. This is so particularly in the context of nutritional transitions induced by modernization and globalization. Here, we calculated the role of bushmeat as a source of micronutrients in the diets of urban and peri-urban inhabitants within the Tres Fronteras (Peru, Brazil, Colombia) region in the Amazon. We gathered food intake data from 35 households using 3-day 24-h food recalls combined with food weighing. Additionally, we interviewed 105 households on food consumption frequency. Our results indicate that 14.3% of the households consumed bushmeat, which represented approximately 32% of their caloric intake, 72% of consumed protein, and 77% of iron. Typically, households consuming bushmeat presented higher a nutritional status, i.e., lower intake of carbohydrates (−10%) and higher intake of proteins (+46%), iron (+151%), and zinc (+23%), than households not consuming bushmeat. Most of the sampled households did not achieve standard nutritional requirements for calories (94%), fiber, vitamin C, or iron (97%) per adult per day. None of the households achieved the recommended daily intake for calcium. Households consuming bushmeat consumed statistically significantly higher levels of iron, zinc, and vitamin C than households that did not eat bushmeat. The latter consumed an excess of 31% calories from processed foods per adult per day, and lower amounts of iron (−60%) and zinc (−19%). We argue that households not consuming bushmeat are at greater risk of anemia in the short run and other chronic health problems in the long run.
The Brazilian Atlantic Rainforest is internationally recognised as one of the most biodiverse and threatened tropical forests in the world Myers, N., Mittermeier, R.A., Mittermeier, C.G., da Fonseca, ...G.A.B., Kent, J., 2000. Biodiversity hotspots for conservation priorities. Nature 403, 853–858. The Seasonal Semi-Deciduous Forest is among the most fragmented and threatened biomes of the Atlantic Rainforest Domain. The largest remnant of this biome (35,000 ha) is protected by the Morro do Diabo State Park (MDSP), situated in the area known as the Pontal do Paranapanema, in São Paulo State, Brazil. Despite its environmental importance, the park is under political, economic and demographic pressure. The main aim of our research was to estimate the population's willingness to pay (WTP) for the conservation of MDSP and for the Atlantic Rainforest's remnants in São Paulo State as a whole, by means of the contingent valuation method (CVM). The results featured a high incidence of null WTP and of protest votes. Nevertheless, the population is willing to pay US$ 2,113,548.00/year (R$ 7,080,385.00/year) for the conservation of the MDSP (use and existence values), or US$ 60.39 ha/year (R$ 202.30/ha/year). The results indicate that the preservation value is strongly associated to the population's ability to pay, increasing with income levels. Qualitative research questions showed that the population considers protected areas to be very important. Still, the valuation of MDSP revealed a gap between the government budget allotted to the park and the value assigned to the area by the public.
The indigenous systems of agricultural and forest management in the Amazon are characterized by a deep knowledge of ecological processes, biodiversity, and the use and management of fire. The ...influence of these systems on the distribution of biodiversity includes semi-domesticated and domesticated species and landscapes, which have led to extensive anthropogenic or cultural forests. However, in many places, the livelihoods of indigenous peoples are being transformed by the intensification of agriculture and social, ecological, and economic changes, putting at risk the sustainability of production systems and food security and sovereignty of these peoples. In the last years, in the Xingu Indigenous Territory (XIT), the food production systems and the form of occupation of territories have changed, affecting the recovery of secondary forests, which now demand a too long period. The increase in the number and frequency of fires has aggravated this situation, due to a drier climate that has become predominant in the region. Changes in climate are attributed to deforestation in the neighboring municipalities, especially in the headwaters of the Xingu river basin. This study was conducted among the Kawaiwete (Tupi-Guarani) and the Ikpeng (Carib-Arara) peoples in the XIT, in the state of Mato Grosso, Brazil. The main objective was to develop alternative techniques of forest management based on indigenous and scientific knowledge more adapted to the new livelihood contexts, aiming to favor forest regeneration in areas dominated by shifting cultivation. We sought to answer the following questions: (I) How do forests regenerate during the fallow period? (II) How can local management improve forest regeneration? (III) Are there indicator species for secondary succession, soil recovery, and vulnerability to fires? (IV) Is the increase in the number of fires affecting the sustainability of the shifting cultivation systems? Our results show that some local practices based on indigenous knowledge have the potential to facilitate natural regeneration, such as choosing forest areas that have been recovered for agricultural use, limiting the number of cultivation cycles, protecting and selecting of individual trees during cultivation period, and attracting seed dispersers. Assisted natural regeneration strategies grounded on indigenous knowledge are promising ways to restore degraded lands of the XIT.
Natural regeneration is key for large‐scale forest restoration, yet it may lead to different biodiversity outcomes depending on socio‐environmental context. We combined the results of a global ...meta‐analysis to quantify how biodiversity recovery in naturally regenerating forests deviates from biodiversity values in reference old‐growth forests, with structural equation modeling, to identify direct and indirect associations between socioeconomic, biophysical and ecological factors and deviation in biodiversity recovery at a landscape scale. Low deviation within a landscape means higher chances of multiple sites in naturally regenerating forests successfully recovering biodiversity compared to reference forests. Deviation in biodiversity recovery was directly negatively associated with the percentage of cropland, forest cover, and positively associated with the percentage of urban areas in the surrounding landscape. These three factors mediated the indirect associations with rural population size, recent gross deforestation, time since natural regeneration started, mean annual temperature, mean annual water deficit, road density, land opportunity cost, percentage cover of strictly protected forest areas, and human population variation in the surrounding landscape. We suggest that natural forest restoration should be prioritized in landscapes with both low socioeconomic pressures on land use conversion to pasturelands and urban areas, and high percentage of forest cover.
Introduction. The aim of this study was to analyse the relationship between learning pat-terns, associated factors, and academic performance in 115 Colombian first-year university students. We posed ...the need to discuss the Vermunt model in other contexts, with an aim to supply evidence toward a more robust, inclusive model in analyzing learning processes. Method. Data were collected using a Spanish version of the Inventory of Learning Style (Martínez-Fernández et al., 2009; Vermunt, 1998). Additionally, we collected data about the students' age, gender, dedication to study, perception of teaching, effort, and academic per-formance. The data were processed by means of descriptive analysis, correlation, MANOVA, and path analysis. Results. The results show a structure of four learning patterns consisting of different factor combinations according to Vermunt: 1) Meaning-directed with external regulation (MD/er); 2) Passive-Idealistic (PI); 3) Passive-Motivated (PM); and 4) Reproduction-directed with lack of regulation (RD/lr). The relationship between learning patterns and the different factors was not sustained. However, we found an interesting explanation of academic performance from the perspective of self- and external regulation. Discussion and Conclusion. Based on these results, we defend the need to make the cultural dimension of learning patterns a key topic in the research agenda on learning processes.
Shifting cultivation systems have been blamed as the primary cause of tropical deforestation and are being transformed through various forms of conservation and development policies and through the ...emergence of new markets for cash crops. Here, we analyze the outcomes of different policies on land use/land cover change (LUCC) in a traditional, shifting cultivation landscape in the Atlantic Forest (Brazil), one of the world’s top biodiversity hotspots. We also investigate the impacts of those policies on the environment and local livelihoods in Quilombola communities, which are formed by descendants of former Maroon colonies. Our findings show that conservation and social policies have had mixed effects both on the conservation of the Atlantic Forest and on the livelihoods of the Quilombola. We conclude that future interventions in the region need to build on the new, functional links between sustainable livelihoods and biodiversity, where less restrictive state policies leave room for new opportunities in self-organization and innovation.
O sistema agrícola itinerante (SAI), uma das formas mais antigas de agricultura, ainda é praticado pelas comunidades quilombolas do Vale do Ribeira-SP, mesmo que venha sendo parcialmente substituído ...pela agricultura permanente e comercial em monocultivo de pupunheira para palmito. Este artigo teve como objetivo avaliar a produtividade entre os diferentes sistemas de cultivo, discutindo os motivos e impactos desta transição e sua sustentabilidade, assim como os impactos econômicos para as comunidades. Na metodologia foram utilizados: itinerário técnico, entrevistas semiestruturadas, visitas a campo e cálculo do valor agregado líquido. Com relação à rentabilidade dos diferentes sistemas (itinerante e permanente) a agricultura permanente se mostrou mais eficiente em termos de renda e no uso do trabalho, do que o SAI. Entretanto, o SAI desempenha um papel não só de produção de alimentos, mas também como parte de um complexo de relações socioambientais.
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