We found that the impact of exotic species is more severe on islands with more exotic species and a greater proportion of native species that are endemic. Unexpectedly, the level of anthropogenic disturbance did not influence an island’s susceptibility to the impacts of exotic species.

This research was conducted as part of my undergraduate research project for the Advanced Studies Program in Science: A global study on the impacts of alien invasive species on island threatened species (2008). Supervisors: Hugh Possingham, Oscar Venter, Richard Fuller, James Watson.