Trends in marine non-indigenous species

Indicator Assessment
Prod-ID: IND-344-en
Also known as: MAR 002
expired Created 27 Oct 2014 Published 03 Mar 2015 Last modified 10 Dec 2019
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Available data shows that the seas around Europe currently harbor 1 416 non-indigenous species (NIS), almost 81% (1 143) of which have been introduced after 1950. These consist mostly of invertebrates (approx. 63%). The rate of new introductions of NIS is continually increasing with 323 new species recorded since 2000 at pan-European level. An increase in NIS introductions is observed for all regional seas. The most affected seas are in the Mediterranean, in particular in the Aegean-Levantine Sea. In this region over 160 new species have been recorded from 2000 to 2010.

Key messages

Available data shows that the seas around Europe currently harbor 1 416 non-indigenous species (NIS), almost 81% (1 143) of which have been introduced after 1950. These consist mostly of invertebrates (approx. 63%).

The rate of new introductions of NIS is continually increasing with 323 new species recorded since 2000 at pan-European level.

An increase in NIS introductions is observed for all regional seas. The most affected seas are in the Mediterranean, in particular in the Aegean-Levantine Sea. In this region over 160 new species have been recorded from 2000 to 2010.

Are marine non-indigenous species increasing in European Seas?

Cumulative number of marine non-indigenous species

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Rate of introduction of marine non-indigenous species

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Cumulative number of non-indigenous species in regional seas around Europe

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Chart – Baltic Sea
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Table – Baltic Sea
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Chart – Greater North Sea
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Table – Greater North Sea
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Chart – Celtic Sea
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Table – Celtic Sea
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Chart – Bay of Biscay and Iberian Coast
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Table – Bay of Biscay and Iberian Coast
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Chart – Western Mediterranean Sea
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Table – Western Mediterranean Sea
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Chart – Adriatic Sea
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Table – Adriatic Sea
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Chart – Ionian Sea and the Central Mediterranean Sea
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Table – Ionian Sea and the Central Mediterranean Sea