Le rôle des rongeurs dans la dispersion des diaspores en milieu forestier (Synthèse bibliographique)

Abstract

Introduction. Seed dispersal is a key interaction influencing a number of ecological processes that are important to the maintenance of diversity in forest ecosystems. Rodents, mainly considered as seed predators, can carry, hide and discard seeds, often transporting them over considerable distances from the parent tree and thus leading to an enhanced germination rate. The role of rodents in forest regeneration therefore depends upon several environmental variables influencing their behavior. Literature. Many publications demonstrate that rodents are mostly seed predators for many species. Nevertheless, because it is hard to define their pattern of movement, the role of rodents in forest regeneration could be underestimated. Through scatterhoarding, rodents may play a crucial role, particularly in those forests where anthropogenic pressures have led to a reduction in the density of large mammals. However, very few studies have been conducted in African moist forests where defaunation can be high, and the role of rodents has been very poorly studied. Conclusions. To understand the phenomenon, we recommend the further investigation of the interactions between seeds and rodents by employing methods that have been commonly used on other continents.