Invasion
Invasion Description
Concarneau, Britanny/France/Belon Estuary (Bay of Biscay) (1996, Rueness 2005)
Geographic Extent
Brittany/France/Faou estuary (2014, Davoult et al. 2017); Dinan, Britanny/France/Rance estuary (2015, Krueger-Hadfield et al. 2017);St. Pol de Leon, Brittany/France/English Channel (2003, Rueness 2005; Hamman et al. 2013); Aber War'ch, Britanny/France/English Channel (2003, Rueness 2005); Britanny/France/Bay of Brest (Surget et al. 2017); l'Elorn/Britanny/France/Atlantic Ocean (2003, Rueness 2005); Concarneau, Brittany/France/Belon Estuary (Bay of Biscay) (1996, Rueness 2005); Etel, Britanny/France/Belon Estuary (Bay of Biscay) (1996, Rueness 2005); Loix/France (2015, Krueger-Hadfield et al. 2017); Jersey, Channel Islands/English Channel (2014, Department of the Environment, States of Jersey 2019)
Vectors
Level | Vector |
---|---|
Alternate | Oyster Accidental |
Alternate | Fisheries Accidental (not Oyster) |
Alternate | Hull Fouling |
Alternate | Ballast Water |
Regional Impacts
Ecological Impact | Habitat Change | |
Agarophyton vermiculophyllum forms extensive mats on mudflats in Brittany (Stiger-Pouvreau and Thouzeau 2015, photo). On mudflats in the Faou estuary, Brittany, abundance of some meiofaunal groups (nematodes, ostracods, interstitial polychaetes) inceased in areas colonized by G. vermiculophylla (Davoult et al. 2017). | ||
Ecological Impact | Food/Prey | |
Areas colonized by G. vermiculophylla had greater primary productivity and community respiration than bare mudflats in the Faou estuary, Brittany (Davoult et al. 2017). The snail Littorina littorea (Common Periwinkle, collected from the Kiel Fjord, Germany), consumed less of the invasive strains of G. vermiculophylla, from St. Pol de Leon, Brittany, compared to non-invasive strains from China. The invasive strains appear to have evolved traits for grazing resistance (Hammann et al. 2013). | ||