ecological correlates and phylogenetic effects in the Canary Islands

摘要: Aim To explore the determinants of island occupancy 48 terrestrial bird species in an oceanic archipelago, accounting for ecological components while controlling phylogenetic effects. Location The seven main islands Canary archipelago. Methods We obtained field data on population density, habitat breadth and landscape distribution Tenerife, Fuerteventura La Palma, aiming to sample all available habitats gradient altitudes. In total, 1715 line transects 0.5 km were carried out during breeding season. also reviewed literature occupancy, distance between Islands nearest border mainland, body size endemicity studied. Phylogenetic eigenvector regression was used quantify (and control for) amount signal. Results two measurements (number occupied or 10 · UTM squares) tightly correlated produced very similar results. birds season had a low effect. Species with broader breadth, stronger preferences urban environments, smaller size, lower degree geographical occupying larger number squares. Main conclusions habitat-generalist tolerance novel environments tend be present more occupy greater area, whereas large-sized that are genetically differentiated within less widespread. Therefore, some properties ranges these explicable from basic biological features. A positive relationship range local abundance, previously shown continental studies, not found, probably because it relies free dispersal continuous landmasses, which may applicable islands.