Global Invasive Species Database

What happens when a species is introduced to an ecosystem where it does not naturally belong? What can we do to stop it spreading?

Invasive species have been introduced into new environments both intentionally and accidentally. Some alien species can co-exist in their new environment without harming native species but others can become invasive and their impact can be ecologically and economically devastating.

History is rich with tales of the disastrous outcomes of intentional introductions such as the Nile Perch which caused the extinction of 200 native fish species.

The Global Invasive Species Database (GISD) is being developed to increase awareness about invasive alien species and to help prevent further invasions. It is managed by the Invasive Species Specialist Group (ISSG) of IUCN’s Species Survival Commission.

The GISD provides reliable and authoritative information on invasive alien species, pathways of spread, their impacts on biodiversity and ways to control and manage their spread. It is used by government agencies, conservationists and businesses.

Fishing in coastal areas of Sri Lanka

Fishing in coastal areas of Sri Lanka

Photo: Niroshan Mirando


Evidence and case studies