Frontiers of Biogeography

An impression of the recent volcanic history of the Canary Island La Palma is given by the southern tip of the island, which is covered with a mosaic of vegetation patches and bare soil of black lapilli (tephra). See the article from Eibes and colleagues, in this issue, on how frequently different plant species in these patches co-occur along an arid elevational gradient. Photo by Pia M. Eibes.