Summary: Global change reshapes how animals move across landscapes, and when, where, and with whom they interact. Understanding these processes is essential for predicting biodiversity responses and guiding management in rapidly changing landscapes. In the teaching part, I introduce these processes conceptually. I then show, using examples from my own work, how field experiments, GPS tracking, and genetic and network analyses can be combined to investigate how land-use change and invasive species modify habitat use and biotic interactions, particularly pollen and seed dispersal networks, with cascading effects on ecosystem processes. Further examples illustrate how individual variation in movement can have direct fitness consequences and influence the contribution of individuals to ecosystem functions. Finally, I discuss how understanding the ecology of mobile link species can improve habitat restoration efforts.