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 19-nov-2024