Table 5. Species responsible for discrimination of macrofauna between two bottom types, as indicated by the SIMPER procedure based on double-root transformed data.
| SIMPER | JAS | RM | ||||
| Diss/SD | Cont% | bare | veg | bare | veg | |
| Theodoxus fluviatillis | 1.8 | 6.2 | 2.4 | 17.5 | 0.8 | 12.7 |
| Idotea chelipes | 2.2 | 6.0 | 0.1 | 11.3 | 3.6 | |
| Mytilus edulis | 2.0 | 5.0 | 0.6 | 5.6 | 0.2 | 3.4 |
| Hydrobia sp. | 1.2 | 5.0 | 384.4 | 410.2 | 609.6 | 807.5 |
| Idotea balthica | 1.8 | 5.0 | 0.1 | 6.3 | 3.4 | |
| Chironomidae larvae | 1.5 | 4.8 | 3.8 | 10.5 | 0.6 | 10.6 |
| Cyathura carinata | 1.3 | 4.5 | 18.8 | 13.4 | 0.5 | 1.8 |
| Gammarus sp. juv | 1.4 | 4.0 | 4.9 | 16.2 | 6.2 | 10.8 |
| Pygospio elegans | 1.2 | 4.0 | 56.3 | 27.7 | 8.4 | 15.1 |
Diss/SD – average contribution to overall dissimilarity divided by standard deviation, Cont% - percentage contribution to total dissimilarity. Mean densities [ind. 0.1 m−2] in groups of samples defined by bottom type (bare, veg) and station (RM, JAS) are presented. Only species of cont% equal or higher than 4 are listed.