RT info:eu-repo/semantics/article T1 Network analysis by simulated annealing of taxa and islands of Macaronesia (North Atlantic Ocean) A1 Torre, Giancarlo A1 Fernández Lugo, Silvia A1 Guarino, Riccardo A1 Fernández-Palacios, José María K1 Macaronesia K1 insular networks K1 island biogeography K1 sistemas insulares K1 biogeografía insular AB With the aim of explaining the role that taxa and island features have in biogeographicalpatterns, we processed presence–absence matrices of all the Macaronesian nativespecies of ten different taxa (arthropods, birds, bryophytes, fungi, lichens, mammals,mollusks, pteridophytes, reptiles and spermatophytes) through simulated annealinganalysis. Distribution patterns among the archipelagos were pinpointed, along withthe different biogeographic roles played by islands and species groups. All the networksanalysed resulted to be significantly modular and the structure of biogeographicmodules reflects known past connections among the archipelagos and the currentdrivers of species distribution. The role assigned to the species supports somebiological (ecological amplitude, degree of endemicity) and functional (long-distancedispersal and persistence abilities) traits of their respective biota and justifies theirposition in recent models of biogeographical distribution. Whereas it was expectedthat the modules identified by the spermatophytes and arthropods would reflect thecompartmentalization of archipelagos quite well, this was also the case for much morevagile taxa, such as fungi or lichens. Conversely, results obtained for pteridophytesand bryophytes suggest that for those taxa geographic distance and/or macroclimaticconditions are less important than the size, age and orography of an island todetermine the modularity of island groups. On the other hand, dry, species-poor islets,act as connectors, tending to cluster together for different taxa, independently of theirarchipelagic adscription, whereas large, high, humid islands tend to form network ormodule hubs representing regional centers of speciation and dispersal. PB Oikos Editorial Office YR 2018 FD 2018 LK http://riull.ull.es/xmlui/handle/915/18485 UL http://riull.ull.es/xmlui/handle/915/18485 LA en DS Repositorio institucional de la Universidad de La Laguna RD 29-mar-2024