Social process of adaptation to environmental changes: How eastern african societies intervene between crops and climate

Mwongera Caroline Njeri, Boyard-Micheau Joseph, Baron Christian, Leclerc Christian. 2014. Social process of adaptation to environmental changes: How eastern african societies intervene between crops and climate. Weather, Climate, and Society, 6 (3) : pp. 341-353.

Journal article ; Article de revue à facteur d'impact
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.

Télécharger (687kB)


Abstract : Studies on climate change can only be conducted on a long time scale, and observing how societies adapt their sowing practices to climate variability is challenging and costly. As an alternative, a space and time substitution design was used, changes in space corresponding to that induced in time by environmental change. On the eastern slope of Mount Kenya, the Tharaka community, originating from the lowlands (750 m), moved up to the midlands (950 m) with their lowland-adapted resources, whereas the Mwimbi, originating from wetter upland (1100 m), moved down to the midlands with their highland-adapted genetic resources. A weather station was installed at 950 and 1100 m, and a logistic model was used to analyze the probability of sowing failure as a function of the length of dry spells after sowing. A total of 1691 plots in 40 surveyed farms were surveyed to compare the Mwimbi and Tharaka during 2 yr and four growing seasons, controlling crops and altitude. Although seed-sowing practices were similar in both communities, the relative risk of sowing failure was 3.3 times more for the Mwimbi than for the Tharaka during the Short Rains, and 1.5 times more during the Long Rains. This difference can be explained by within-community seed exchanges, as Tharaka seeds, originally from the lowlands, are adapted to drier conditions, whereas Mwimbi seeds are adapted to wetter conditions. The findings suggest an impact of historical and social factors on the mitigation of sowing failure risk. Thus, they must be considered as an integral part of the adaptation process to climate variability and change. (Résumé d'auteur)

Mots-clés Agrovoc : Agriculture, Changement climatique, Sociologie, Adaptation, Pratique culturale, Ensemencement, adaptation aux changements climatiques

Mots-clés géographiques Agrovoc : Kenya

Classification Agris : P40 - Meteorology and climatology
E50 - Rural sociology
F08 - Cropping patterns and systems

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

  • Mwongera Caroline Njeri, Montpellier SupAgro (FRA)
  • Boyard-Micheau Joseph, CRC (FRA)
  • Baron Christian, CIRAD-ES-UMR TETIS (FRA)
  • Leclerc Christian, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad - Agritrop (

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2020-09-28 ]