title: Evidence of weaker phenotypic plasticity by prey to novel cues from non-native predators.
abstract: A central question in evolutionary biology is how coevolutionary history between predator and prey influences their interactions. Contemporary global change and range expansion of exotic organisms impose a great challenge for prey species, which are increasingly exposed to invading non-native predators, with which they share no evolutionary history. Here, we complete a comprehensive survey of empirical studies of coevolved and naive predator-prey interactions to assess whether a shared evolutionary history with predators influences the magnitude of predator-induced defenses mounted by prey. Using marine bivalves and gastropods as model prey, we found that coevolved prey and predator-naive prey showed large discrepancies in magnitude of predator-induced phenotypic plasticity. Although naive prey, predominantly among bivalve species, did exhibit some level of plasticity - prey exposed to native predators showed significantly larger amounts of phenotypic plasticity. We discuss these results and the implications they may have for native communities and ecosystems.
authors.affiliation: Department of Biology, Aquatic Ecology Lund University Ecology Building SE-223 62 Lund Sweden.
authors.forename: Johan
authors.initials: J
authors.lastname: Hollander
authors.affiliation: Department of Biological Sciences Humboldt State University 1 Harpst St. Arcata California 95521.
authors.forename: Paul E
authors.initials: PE
authors.lastname: Bourdeau
keywords: Coevolution; inducible defensive traits; meta‐analysis; naive interactions