Introductions of Dreissena polymorpha
n = 17
Year / Period From To Established Ecological effects
unknown Ponto-Caspian and the Aral Sea Jamaica yes unknown
unknown Ponto-Caspian and the Aral Sea Spain yes unknown
1840 - 1849 Ponto-Caspian and the Aral Sea Poland yes unknown
1940 - 1949 Ponto-Caspian and the Aral Sea Switzerland yes unknown
1820 - 1829 Ponto-Caspian and the Aral Sea United Kingdom yes unknown
1794 Ponto-Caspian and the Aral Sea Hungary yes unknown
1827 Ponto-Caspian and the Aral Sea Netherlands yes unknown
1830 Ponto-Caspian and the Aral Sea Germany yes unknown
1840 Ponto-Caspian and the Aral Sea Denmark yes unknown
1977 Ponto-Caspian and the Aral Sea Italy yes unknown
1986 Ponto-Caspian and the Aral Sea Canada yes unknown
1986 Ponto-Caspian and the Aral Sea United States of America yes unknown
1988 Europe Canada (Ontario) yes yes
1988 Europe United States of America yes yes
1991 East Atlantic East coast of North America yes unknown
1993 Ponto-Caspian region Fresh and brackish waters of Ireland yes probably yes
1996 Ponto-Caspian and the Aral Sea Ireland yes unknown
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