Biological Invasions: why it Matters

The dispersal of organisms is a natural process,important for the distribution of life on earth. It is also important for the appearance and expression of biodiversity, strengthening the multiple forms and functions of diversity in living organisms.We, too, profit from this process and its dynamics, and are even dependent on it. On a longer time scale, dispersal is one of the drivers of evolution, responsible for life itself.

Dispersal is limited by multiple barriers,among which geographical barriers are the most evident.However, human dispersal has overcome all biogeographical barriers, and humans now inhabit all parts of the world. Our activities are on a global scale, and we have been working intensively for centuries to connect all parts of the world ever closer together. In human history, roads were the first expression of these interconnections, as well as shipping.Today, we can reach any spot on earth by plane within 24 h, and vessels transport cargo around the globe within a few weeks. In addition, new connections between water drainage systems, lakes and oceans have been constructed.