Invasion
Invasion Description
1st Record- Wismar/Germany/Wismar Bight, Belt (Baltic Sea) Sea (1887, Olenin and Leppakoski 2000)
Geographic Extent
ismar/Germany/Wismar Bight, Belt (Baltic Sea) Sea (1887, Olenin and Leppakoski 2000); Denmark/Randersfjord (2005, Jensen and Knudsen 2005); Rostock/Germany/Warnow Estuary (Wittfoth and Zettler 2013); Denmark/Kysing Fjord (Lassen 1979)
Vectors
| Level | Vector |
|---|---|
| Alternate | Dry Ballast |
| Probable | Packing Material |
Regional Impacts
| Ecological Impact | Trophic Cascade | |
| Moderate ecosystem impacts (Thomsen et al. 2009, Zaiko et al. 2011). This assessment is based on abundance in estuaries and reported impacts (grazing and nutrient release, foodweb changes) in freshwater systems (Thomsen et al. 2009). | ||
| Ecological Impact | Competition | |
| Potamopyrgus antipodarum had a higher reproductive output than 2 native sexually reproducing hydrobiids Hydrobia ventrosa and H. ulvae, although less than another sexually reproducing species, H. neglecta, which was considered a 'fugitive species', mostly found in disturbed environments (Lassen 1979). | ||