Density dependence mediates the ecological impact of an invasive fish

Aim The way in which habitat heterogeneity and predator density affect predator–prey dynamics, space use and prey risk are understudied aspects of foraging ecology, particularly for invasive species. Likewise, how an invasive species’ impact scales with its abundance is poorly understood. We used a model invasive species—lionfish ( Pterois volitans )—to understand emergent multiple predator effects and influences of habitat heterogeneity on...