Département Agriculture et innovation technologique, UFR Agriculture, Ressources Halieutiques et Agro-Industries, l’Université de San Pédro, BP 1800 San - Pedro, Côte d’Ivoire
This study sought to investigate the relationships between climate trends and tree reproductive cycles at the National Floristic Center of Abidjan over a period of more than thirty years. Climate trends were analyzed and reveal major increases in rainfall; more frequent extreme events; à decline in maximum temperature, which is a direct contradiction to the global records observed; and tree phenological rhythms. Monitoring of eleven tree species demonstrated continuous fruiting the greatest being in December for thirteen individuals, flowering at peak in February for five individuals belonging to three different species, and exhibiting different adaptations to new environmental conditions. The results indicated a high level of synchronization between the biological cycles of trees and climatic parameters. In this respect, the biological rhythms were particularly more sensitive to temperatures between January and May and the triggering of reproductive phases was more tied to rainfall. Overall mixes of responses were shown by the species, by climate trends and by climate variables.