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Impact of climate change on the agroecological innovation of coffee agroforestry systems in Central Kenya

Gebreeyesus K.A.. 2017. Montpellier : Montpellier SupAgro, 221 p.. Thèse de doctorat -- Economie.

Climate change and variability is the most widespread anthropogenic challenge affecting agricultural production and productivity particularly in the tropics. Coffee sector is sensitive to climate change as it requires relatively cold temperature and higher rainfall duration. Adaptation to climate change in the coffee agroforestry is, therefore, important to address the impacts, but there are barriers, and limits. The aim of this Thesis was to analyze the adaptation strategies to climate change in Central Kenya. We studied the steps in adaptation, which includes (1) the knowledge on climate change and adaptation, the motivation towards adaptation, (2) current choices of households' adaptation strategies, and their determinants, (3) the roles of innovation system and institutional context to support adaptation. This study was based on four sources of information: - (1) Focus Group Discussions to predefine the questionnaires, (2) household surveys, (3) stakeholders interview, and, (4) historical climate data. The data collection considered four farming typologies; - food crops, specialized coffee, diversified coffee-dairy and specialized dairy farming systems in the coffee and food crops zones. Mann-Kendal trend analysis and Sen's slope estimator were used to compare the farmers' knowledge of climate change with the historical climate data, while Heckman model was used to analyze adaptation strategies and their determinants. The findings explore consistent results between farmers' knowledge and historical data analysis for temperature, while inconsistency is observed in rainfall change. Analysis of farmers' perception revealed rainfall is radically declining over time, while no evidence in rainfall record is found to support the farmers' perception. The inconsistency is therefore, substantiated with analysis of patterns. Coffee and food crop farmers are found to adapt to climate change differently. Farmers who are aware of the changes are found more willing to explore

Mots-clés : changement climatique; agroécosystème; agroécologie; pratique culturale; agroforesterie; theobroma cacao; adaptation aux changements climatiques; adaptation; structure agraire; Économie agricole; politique agricole; kenya

Thématique : Météorologie et climatologie; Systèmes et modes de culture; Economie et politique agricoles

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