By analysing the genetic fingerprints of the plants, scientists found evidence that seeds from plants from North-western Russia and Greenland, had repeatedly colonised the archipelago over the past 20 000 years.

Probable dispersal vectors are wind, wood, sea ice, birds and mammals.

This ability to migrate is important for plants in the high latitudes, as they will be able to move themselves along with climatic changes. These findings also suggest that future studies should have greater confidence that seeds can travel long distances.

Sources : Climat CO2, BBC News, Nouvelobs.com