This second interview with Alberto Basset, Professor of Ecology at the University of Salento and Director of the LifeWatch ERIC Service Centre in Lecce, Italy, concerns "How biodiversity is organised and maintained". The organisation doesn't vary simply according to the species found in a given system, how many are primary producers, how many are consumers or predators, the space available or the resources on hand; it is related to fundamental drivers on energy availability, disturbance inten...