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CGIAR/CCAFS (2013)

Assess land use change dynamics, deploy GHG measurement equipment at long-term dryland sites

Land Use Dryland

Research program : Climate Change, Agriculture and Food Security (CCAFS)

Titre : Assess land use change dynamics, deploy GHG measurement equipment at long-term dryland sites

Région /Pays : Aride

Date : Jan 1, 2013 to Dec 1, 2015

Présentation
A major source of carbon emissions is deforestation and forest degradation with 0.9– 2.2 Pg C / yr being released to the atmosphere (Houghton 2010). Clearing of land for agricultural practice is the primary driver of deforestation, particularly in tropical regions (Geist & Lambin 2002) with the Sudanian eco-zone of West Africa being the worst effected area in SSA (Brink & Eva 2009). Despite this dramatic expansion population growth continues to outstrip increases in food production, thus intensifying the land-use pressure (Mwangi 1996). African ecosystems contribute about 20% of global NPP and 20 percent of global CO2 emissions (0.3 ± 0.2 PgC / year) due to forest degradation and deforestation (Ciais et al. 2011). Despite the importance of African ecosystems to the global carbon budget, and the socio-economic vulnerability to a changing climate, there is still a lack of studies addressing these important issues. Semi-arid regions with extensive savanna woodland have been particularly neglected. Increasing agricultural yields has been proposed as a potential mechanism for reducing deforestation and resulting CO2 emissions (Angelsen 2010). Agricultural intensification is thought to have the potential to support the increasing food demands of a growing rural population. However many extensive land-use systems are marginal in productivity terms with often little adaptive capacity (Lambin et al. 2000). More than 40% of the population in Africa live in arid, semi-arid or dry sub-humid areas, increasing the vulnerability of the extensive savanna coverage in these regions (FAO 2007). Consequently, improving our spatially explicit understanding of the both the degradation of natural vegetation and complete conversion to agriculture will allow us to identify areas that are most vulnerable.

Participants au projet
Coordinateur : International Crops Research Institute for the Semi-Arid Tropics ICRISAT
Partenaires : World Agroforestry Centre  ; Institut d’Economie Rurale  ; Savannah Agricultural Research Institute  ; NASA Jet Propulsion Laboratory  ; Association Malienne d’Eveil au Développement Durable  ; Joint Experiment for Crop Assessment and Monitoring  ; Universite de Sherbrooke

Présentation : CGIAR/CCAFS

Page publiée le 28 octobre 2015, mise à jour le 20 novembre 2017