More than 100 scientific papers per year come from researches done at Paracou. So that it is likely that works close to the project you are planning have already been made during the last 30 years. We thus strongly encourage you to take the time to pursue a detailed review of the existing literature on your specific questions. This may help you to delineate new truly-original research questions and to strengthen the underlying rationales of your current project.
Bruno Hérault may help you with the specific French grey literature.