Richard Hobbs, Leonie Valentine and colleagues believe we should be paying increased attention to species movement in response to environmental change (Hobbs et al, 2017). In particular we need to consider changes in species distributions and altered biological assemblages. Such changes are well known from paleoecological studies, but have accelerated with ongoing pervasive human influence. Some species move, others will stay put, and this leads to an array of novel interactions. Species show a variety of responses that can allow movement or persistence. Conservation and restoration actions have traditionally focused on maintaining or returning species in particular places. More recently they increasingly also include interventions that facilitate movement. Approaches are required that incorporate the fluidity of biotic assemblages into the goals we set and the interventions we make.
Hobbs RJ, LE Valentine, R Standish & ST Jackson (2017). Movers and Stayers: Novel Assemblages in Changing Environments. Trends in Ecology & Evolution. https://doi.org/10.1016/j.tree.2017.11.001