Marion investigated through simulation modelling with NetLogo how neutral and adaptive genetic variation becomes distributed and maintained in a metapopulation which is adapting to environmental variation by three radically different mechanisms: (i) natural selection on genetic variation, (ii) phenotypic plasticity, (iii) Matching Habitat Choice. The results are in this paper. Her solid experience in among-individual variation in behaviour has been very useful. (Two-year “Juan de la Cierva” contract from Spanish Ministry of Economy and Competitiveness, but moved to University of Groningen to start her own project after one year).