Variabilité Climatique Et Changements Dans L’environnement À Korhogo En Côte D’ivoire : Mythes Ou Réalité ?

Abstract

Climate change which is considered as a threat to biodiversity, causes paradoxical situations everywhere it manifests itself. These include, among others, drought and desertification; floods and storms; sea level rise, reduction of the vegetation cover; water supply sources and, animal and plant species disappearance. In Korhogo, in the North of Côte d’Ivoire, the climate variability and environmental change phenomena are perceived and described by the population. A qualitative approach with historical and comparative analysis tools are used in this study to focus on the perceptions of the populations through indicators of both climate variability and environmental changes. It also analyses the major challenges the population will face, which are mainly related to alteration in farming practices and seasons, loss of production, and extension of the lean period, the risk of food insecurity and conflicts related to the exploitation and the distribution of water resources; and mostly, to the lack of information- educationcommunication on the phenomenon. On the whole, although the study brings out an awareness about climate variability and environmental changes, it especially show the need for emergent multidimensional actions for effective response strategies to the changes observed in the area.

Évaluation des pratiques culturales de l'arachide favorisant la contamination par les aflatoxines dans trois régions de Côte d'Ivoire

“…Dans les régions de Bouaké et Daloa, les semis s'effectuent au cours du mois de mars qui correspond au début de la saison pluvieuse dans ces zones. Selon Boko-Koidia et al (2016), le mois de mai marque le début de la saison des pluies dans la région de Korhogo, définissant ainsi le début des semis. Comparativement, selon une étude menée au Ghana, les dates de semis se situent d'avril à juillet (Dzomeku et al, 2009).…”

“…Produite principalement dans les régions Nord et Centre de la Côte d'Ivoire (ANADER, 2009), la production d'arachide a été estimée à 88 000 tonnes (FAOSTAT, 2013). L'intégralité de cette production est cependant consommée sur place et principalement sous forme de pâte d'arachide (Boli et al, 2013;Diakité et al, 2017).…”

Understanding the Local Carbon Fluxes Variations and Their Relationship to Climate Conditions in a Sub-Humid Savannah-Ecosystem during 2008-2015: Case of Lamto in Cote d’Ivoire

“…Table 1 shows that GPP and TER are also better correlated under these conditions. Indeed, Equation (7) and Equation (14) explain 83% (p-value = 0.0004) and 79% (p-value = 0.000077) of the GPP and TER variances, respectively with high significance. In this case, the constant terms 1466.18 gC·m −2 ·month −1 in Equation (7) and 812.44 gC·m −2 ·month −1 in Equation 14represent potential non-linear effects or coupled effects of radiative flux (Fr) or temperature (Te), such as those resulting from interactions with other variables.…”

“…As in a humid tropical ecosystem such as that of the Lamto region, where climate variables are dependent and interact strongly with each other [24], the three-variable linear model would then be more representative of the impact of these meteorological conditions on the variability of GPP and TER. However, Equation 7, Equation (10), Equation (14) and Equation (17)) show that the effect of rainfall is marginal for GPP and TER seasonal variations. Considering rainfall in the linear model reduces the determination coefficient by 0.03 for the GPP and increases it by 0.02 for the TER while reducing their degree of significance by increasing p-value.…”

“…Across the region, the changes in the climate are much more manifested in the form of frequent occurrence of intense extreme event [14] [15] (e.g. Heat Waves, Drought, Wet and Dry Spells, etc.…”