Non-indigenous estuarine and marine organisms

Abbreviations used:

[B.]: found in the Baltic Sea.
[Oreg.]: found in Other regions
[Exp.]: found in Experimental studies.

Notes:

1. Species links contain full entries
2. Other links include full bibliographic reference(s)
3. For explanation see Database Help

	Gulf of Bothnia/ecological impact: Community dominance
	Gulf of Bothnia/ecological impact: Community dominance

Alien species name	First observed	Taxon	Ecofunctional group	Origin	Vector of introduction	Salinity range in native habitats	Ecological impact
Acartia tonsa	1925	Crustacea	Zooplankton suspension feeders	Indo-Pacific North America	Shipping	Polymixohaline	Benthic-pelagic interaction [B.] Bioacummulation [B., Exp., Oreg.] Community dominance [B., Oreg.] Competition [Oreg.] Food-prey [B., Oreg.] Herbivory [Oreg.]
Balanus improvisus	1844	Crustacea	Benthic suspension feeders	North America	Shipping	Polymixohaline to Euhaline	Benthic-pelagic interaction [B., Exp., Oreg.] Bioacummulation [B.] Community dominance [B., Oreg.] Competition [B.] Food-prey [B.] Habitat change [B.]
Cercopagis pengoi	1992	Crustacea	Zooplankton predators	Ponto-Caspian	Shipping	Limnetic	Benthic-pelagic interaction [B.] Community dominance [B., Oreg.] Competition [B.] Food-prey [B.] Herbivory [B.] Predation [B., Exp., Oreg.]
Cordylophora caspia	1803 **	Hydrozoa	Benthic suspension feeders	Ponto-Caspian	Shipping	Limnetic to Euhaline	Benthic-pelagic interaction [Oreg.] Bioacummulation [Exp.] Community dominance [B.] Competition [B., Oreg.] Habitat change [B., Oreg.] Predation [B., Oreg.]
Elodea canadensis	1870 **	Hydrocharitacea	Macrophytes	North America	Ornamental	Limnetic	Benthic-pelagic interaction [Exp., Oreg.] Bioacummulation [Exp., Oreg.] Community dominance [Oreg.] Competition [Oreg.] Food-prey [Oreg.] Habitat change [Oreg.]
Marenzelleria arctia	2005	Polychaeta	Benthic deposit feeders	Arctic waters	Shipping	Limnetic to Polymixohaline	Community dominance [Oreg.]
Marenzelleria neglecta	1985	Polychaeta	Benthic deposit feeders Benthic suspension feeders	North America	Shipping	Polymixohaline to Euhaline	Benthic-pelagic interaction [B.] Community dominance [B., Oreg.] Competition [B., Exp., Oreg.] Food-prey [B.] Habitat change [B.] Predation [B.]
Mya arenaria	1245 **	Mollusca	Benthic suspension feeders	North America	Shipping	Polymixohaline to Euhaline	Benthic-pelagic interaction [B., Exp., Oreg.] Bioacummulation [B.] Community dominance [B., Oreg.] Competition [B., Oreg.] Food-prey [B., Oreg.] Habitat change [B., Exp., Oreg.]
Potamopyrgus antipodarum	1887	Mollusca	Benthic deposit feeders	Pacific	Shipping	Limnetic to Polymixohaline	Community dominance [B.] Competition [Oreg.] Food-prey [B., Oreg.] Herbivory [Oreg.] Transfer of parasites and diseases [Oreg.]

The mark ** next to the year means, that only decade (sometimes even century) is known.