The ‘Rate of Invasive Alien Species Spread Indicator’ measures the change in impact risk from invasive alien species (IAS) that are expected to have entered a new region given general observation trends and available impact data. This indicator can be expressed as a trend or a species distribution, and disaggregated by taxonomic group, region, country and type of impact to prioritize impacts and sites to eliminate or reduce these impacts.

  EBV class Species Populations
Species distribution

To provide a five-yearly updated metric of how the numbers of introduced invasive alien species are changing globally and in countries, as well as by pathways of introduction. The Rate of Invasive Alien Species Spread Indicator benefits from country checklists of IAS provided by the Global Register of Introduced and Invasive Species (GRIIS), ongoing collection of data by countries on the presence and distribution of IAS, GBIF occurrence data and a range of other resources (see below). It is designed to measure and report on long-term progress to slowing the rate of IAS introductions, within and across policy reporting cycles.

CBD Aichi Target 9
Invasive alien species prevented and controlled

The indicator uses IAS species data at a country resolution or major taxonomic groups and from 1970 onwards.


For further information on developments and methods underpinning this indicator see:

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