Invasion
Invasion Description
1st record: Finland/lower Gulf of Bothnia (Leppakoski and Olenin 2000)
Geographic Extent
Finland/lower Gulf of Bothnia (Leppakoski and Olenin 2000) Soderhamn/Sweden/Gulf of Bothnia (molecular ID, Bastrop and Blank 2006)
Vectors
| Level | Vector |
|---|---|
| Alternate | Natural Dispersal |
| Alternate | Ballast Water |
Regional Impacts
| Ecological Impact | Competition | |
| Some community impacts (Zaiko et al. 2011). Marenzelleria spp. have been increasing, while the dominant amphipod, Monoporeia affinis, has decreased. This may have resulted from a decrease in primary production and food quality in the benthos. In experiments, Marenzelleria was a superior competitor when food quantity and quality were low (Eriksson Wikland and Andersson 2014). | ||