Number and cumulative number of non-indigenous species in Europe's marine subregions, 1970-2020

Figure Created 08 Feb 2023 Published 24 Feb 2023 Last modified 24 Feb 2023
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The combo charts show the number of new introductions of non-indigenous species (NIS) (dots with trendline, primary axis) and the cumulative number of NIS by main species group (stacked columns, secondary axis) reported in Europe’s marine subregions, per 6-year interval between 1970 and 2017.

European data


Additional information

• NIS registered in more than one subregion are recorded in each; subregional assessments thus do not add up to regional or pan-European assessments as these consider each species only once (see Fig 1).
• Circles on the map show the number of new NIS introduced between 1970-2020 by subregion.
• The latest assessment cycle consists of only 3 years (2017-2020).


Geographic coverage

Temporal coverage


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