"The factors affecting the establishment success of introduced populations (be them accidently introduced noxious species or purposely introduced beneficial species) are still poorly understood. Investigating these factors (demographic, genetic, and environmental) requires experimental approaches, in which factors can be manipulated and isolated. Biological control is a particularly appropriate model system to develop such approaches. Indeed, the establishment of populations introduced in the context of biological control, biological invasions and biological conservation involve the same evolutionary processes and differ only in that introduction can be either planned and beneficial or fortuitous and noxious. However, while experimental approaches are difficult or impossible to carry out with invasive or endangered species, biological control offers the exceptional opportunity to manipulate the characteristics of introduced populations and their conditions of introductions.This project aims at creating links between researchers aiming at investigating the factors affecting the establishment success and dynamics of introduced population, via the study of biological control programs. This project proposes to enable early-stage researchers (ESR) to travel within the consortium. During the secondment periods, the ESR will participate to collaborative research programs and transfer competences and know-how between teams having contrasted specialties (ranging from classical biological control to evolutionary and community ecology). This project will support the training of Early-Stage researchers and research projects having two main impacts: (1) academic impacts in Ecology and Evolution (about factors affecting the establishment and dynamics of introduced populations), and applied impacts in biological control (investigation of conditions favouring the success of biological control programs, of interest for both public and commercial sectors)."