Biological invasions are a major threat to the ecosystems are currently facing. Its effects can manifest in many ways. However, to date little is known about the consequences, ecological and evolutionary, which may have biological invasion processes. The results of a joint project conducted by researchers at the University of Coimbra (Portugal) and University of Vigo (Spain) in which they have tried to clarify the patterns that govern the processes of biological invasion research are presented in this video. To this end, researchers have worked with a species of plant native to South Africa, Oxalis pes-caprae, which currently behaves as invasive in all the ecosystems having Mediterranean climate.