The effect of lizards on spiders and wasps: variation with island size and marine subsidy

Introduced predators can have dramatic effects on island ecosystems, the magnitude of which are likely to vary with island characteristics. We investigated the influence of two important properties of islands—size and amount of resource subsidy—on the effects of an introduced predatory lizard ( Anolis sagrei ) on three groups of arthropod prey. Lizards were experimentally introduced to 16 islands that spanned gradients in vegetated area and...