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  Smallholder farmers' perceptions of the natural and anthropogenic drivers of deforestation and forest degradation: a case study of Murehwa, Zimbabwe

  Forests are an integral part of social-ecological systems, which provide economic, cultural and ecosystem services. The natural and socio-economic drivers of deforestation and forest degradation are affecting the sustainability of social-ecological systems. Several measures have been put in place to manage forest ecosystems. Nonetheless, multiple and complex drivers of deforestation and forest degradation have compromised these measures. The study sought to establish smallholder farmers’ perceptions on the multiplicity and complexity of factors to which they attribute deforestation and forest degradation. This is important for the successful formulation of improved forest conservation and management frameworks. The study was carried out with smallholder farmers in three wards of Murehwa District in Mashonaland East Province of Zimbabwe. Using ‘Q’ sort and factor analysis, we find that the smallholder farmers attribute deforestation and forest degradation to climate change, insects and diseases, unavoidable external events, a lack of alternative sources of fuel and the failure of existing institutional arrangements. Under such circumstances, forest governance and management efforts that focus solely on controlling human activities may not bring desired outcomes. Therefore, there is a need to take into account external factors when designing an effective contextual forest management strategy or framework.
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  Smallholder farmers' perceptions of the natural and anthropogenic drivers of deforestation and forest degradation: a case study of Murehwa, Zimbabwe

  Forests are an integral part of social-ecological systems, which provide economic, cultural and ecosystem services. The natural and socio-economic drivers of deforestation and forest degradation are affecting the sustainability of social-ecological systems. Several measures have been put in place to manage forest ecosystems. Nonetheless, multiple and complex drivers of deforestation and forest degradation have compromised these measures. The study sought to establish smallholder farmers’ perceptions on the multiplicity and complexity of factors to which they attribute deforestation and forest degradation. This is important for the successful formulation of improved forest conservation and management frameworks. The study was carried out with smallholder farmers in three wards of Murehwa District in Mashonaland East Province of Zimbabwe. Using ‘Q’ sort and factor analysis, we find that the smallholder farmers attribute deforestation and forest degradation to climate change, insects and diseases, unavoidable external events, a lack of alternative sources of fuel and the failure of existing institutional arrangements. Under such circumstances, forest governance and management efforts that focus solely on controlling human activities may not bring desired outcomes. Therefore, there is a need to take into account external factors when designing an effective contextual forest management strategy or framework.
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  Soil and vegetation carbon stocks after land-use changes in a seasonally dry tropical forest

  The lack of robust scientific data still hinders estimates of soil and plant carbon (C) losses due to land-use changes in most dry tropical ecosystems. The present study investigated the effects of land-use and cover changes on total ecosystem C stocks in NE Brazil, aiming to quantify C losses after the removal of the native forest, known as Caatinga. The sampling design included the four main land-use/cover types (Dense Caatinga, Open Caatinga, Pastures and Crop fields) and the seven main soil classes (Arenosols, Acrisols, Regosols, Ferrasols, Luvisols, Planosols, and Leptosols), a combination that represents over 90% of the region. This design resulted in 192 sampling points (48 in each land-use), distributed proportionally to the area of occurrence of each soil class. In each sampling point, we determined C stocks in soil organic matter (SOM) and roots (to a depth of 1 m or rock layer), aboveground vegetation biomass (trees and herbs, separately), deadwood, and surface litter. Areas covered by Dense Caatinga store, on average, nearly 125 Mg ha−1 of C. Most of this C is stored in the soil organic matter (72.1%), followed by aboveground biomass (15.9%), belowground biomass (7.3%), deadwood (2.9%), litter (1.3%), and herbaceous biomass (0.5%). The substitution of Dense Caatinga to plant pastures and crop fields caused losses of >50% of ecosystem C stocks, reaching almost 65 Mg ha−1 of C, with nearly equal losses from the SOM and vegetation biomass compartments. Open Caatinga store nearly 30% less C than Dense Caatinga. Contrary to what was expected, the overall differences in C stocks between soil classes were not significant, with a few exceptions. We expect that the findings of this study will contribute to a more robust inventory of GHG emissions/removals due to land-use changes in NE Brazil and other dry tropical regions of the globe.