Abstract
Degradation and restoration are two central processes within the Great Green Wall initiative in Senegal. Degradation caused by human activities, in interaction with global changes, leads to the loss of habitats and the disappearance of many species. It is therefore necessary to know the state of diversity in order to be able to protect it and better understand how to restore it, notably by re-establishing interspecific interactions within the ecosystems concerned by the restoration. In our study we are interested in the interactions between plants and flower visitors, and more specifically pollinators. A first sampling was conducted in three different localities in the Ferlo in northern Senegal, in order to be able to differentiate the dominant guilds of insects that interact with the flowers of certain trees present in this Sahelian zone. We carried out a rapid sampling of insects interacting with the flowers of four tree and shrub species in flower at the time of the study: Acacia nilotica, Balanites aegyptiaca, Acacia raddiana, Ziziphus mauritania. Four orders of insects are numerically dominant: Coleoptera, Hymenoptera, Lepidoptera and Diptera. Amongst the Hymenoptera sampled, Apoidea, Vespoidea, and Ichneumonoidea have been identified, allowin us to have a first idea of the great diversity and the relative abundances of different wild species present, comprising rich but potentially vulnerable communities. Through this poster, we illustrate and describe the first results on the interactions between these plant species and their flower visitors, which have been little studied in the region.