Introduced species

How do introduced species cause problems for biodiversity? What makes a species invasive? When humans introduce non-native species to a new environment, it can have disastrous impacts on native species and the entire ecosystem.

The presence of invasive species generally leads to negative impacts, some perhaps irreversible, and the economic costs from the impacts and their management can be substantial and long-lasting. Efforts to understand the extent of damages caused by invasive species are slowly gaining momentum globally; however, in many countries, efforts are only beginning. This guide will assist Pacific island practitioners to use the costs that result from invasive species incursions to gain support to fund prevention, management, restoration, research and outreach.