Figure 1
Locations of the study sites. GIS layers used for drawing the map were obtained from the GIS Centre of the University of Gdańsk
Table 1
Information about Mytilopsis leucophaeata and parameters measured at the study sites. Numbers in brackets presented in the “site” column refer to the numbers of sites used in Figure 1
| Mytilopsis leucophaeata | ||||||||
|---|---|---|---|---|---|---|---|---|
| Site | Abundance (ind. m ) | Shell length (mm) | Temperature (°C) | Salinity (PSU) | Depth (m) | Substrate description | Dominant accompanying species | |
| Gulf of Gdańsk | Torpedo testing facility (4) | 19 | 5-13 | 14 | 6.9 | 7.5 | Rough, concrete walls | Amphibalanus improvisus Mytilus edulis trossulus Gonothyraea loveni |
| Other 6 sites (1-3, 5-7) | 0 | - | 5-18 | 6.8-7.2 | 5-20 | Rough, concrete walls, steel shipwrecks, natural boulders | Amphibalanus improvisus Mytilus edulis trossulus Hydrozoa | |
| Wisła Śmiała | National Sailing Center (8) | 69 | 11-21 | 19 | 4.2 | 4 | Very rough steel plating | Amphibalanus improvisus Mytilus edulis trossulus Rhithropanopeus harrisii |
| Martwa Wisła | “Galeon” shipyard (9) | 31 | 13-22 | 19 | 6.4 | 4 | Rough steel plating | Amphibalanus improvisus Porifera Rhithropanopeus harrisii |
| Błotniki Yacht Port (12) | 1a) | 16 | 19 | 6.2 | 4 | Smooth steel pile | Amphibalanus improvisus Porifera | |
| Vistula | 2 sites (10, 11) | 0 | - | 18 | 0.4 | 2-3 | Rough concrete pier and steel piles | Dreissena polymorpha Gammarus spp. |
| Vistula Lagoon | 5 sites (13-17) | 0 | - | 17-19 | 2.5-4.0 | 2-3 | Rough and smooth concrete pier | Dreissena polymorpha Rhithropanopeus harrisii |