Alien predators are more dangerous than native predators to prey populations.

@article{Salo2007AlienPA,
  title={Alien predators are more dangerous than native predators to prey populations.},
  author={P{\"a}lvi Salo and Erkki Korpim{\"a}ki and Peter B Banks and Mikael Nordstr{\"o}m and Chris R. Dickman},
  journal={Proceedings. Biological sciences},
  year={2007},
  volume={274 1615},
  pages={1237-43}
}
Alien predators are widely considered to be more harmful to prey populations than native predators. To evaluate this expectation, we conducted a meta-analysis of the responses of vertebrate prey in 45 replicated and 35 unreplicated field experiments in which the population densities of mammalian and avian predators had been manipulated. Our results showed that predator origin (native versus alien) had a highly significant effect on prey responses, with alien predators having an impact double… CONTINUE READING