Power in numbers. Drivers of high population density in insular lizards

摘要: Aim Islands organisms usually have fewer predator and competitor species than mainland ones. This is thought to result in high population densities on islands. We hypothesize that insular lizards denser populations density, general, negatively correlated with richness. Location Global. Methods We compared of 346 lizard islands the while examining relationship between density and, richness, primary productivity, seasonality island area. controlled for phylogenetic non-independence, body mass study area, which are known strongly affect density. Results Insular (especially snake-free islands) Mainland also inhabit were those do not Population was highest low net productivity significantly affected by or richness. Moreover, show regardless area. Main conclusions We conclude ability reach may increase their chances reaching successfully colonizing postulate be rather Density from environmental simplicity faunas but through propagule sorting pressure.