Table 7 Densities of 15 species from dredge samples in the disposal (n=12) and reference (n=12) areas
From: The impact of harbour sludge disposal on benthic macrofauna communities in the Weser estuary
Taxon | Significancea | Disposal area (stations I–IV) | Reference area (stations VI–IX) | ||
|---|---|---|---|---|---|
Mean | ±SD | Mean | ±SD | ||
Metridium senile | * | 6.3 | 9.8 | 38.2 | 68.4 |
Sagartia troglodytes | ** | 0.0 | 0.0 | 4.6 | 6.4 |
Obelia longissima | 23.5 | 37.0 | 6.5 | 11.0 | |
Sertularia cupressina | 0.2 | 0.4 | 1.3 | 2.1 | |
Crangon crangon | 114.8 | 170.3 | 283.8 | 388.6 | |
Gammarus salinus | 14.6 | 31.0 | 2.0 | 2.8 | |
Gammarus locusta | 3.9 | 7.9 | 1.6 | 3.4 | |
Carcinus maenas | 7.8 | 12.9 | 17.5 | 26.4 | |
Praunus flexuosus | 4.9 | 8.7 | 2.3 | 3.7 | |
Nereis succinea | 0.0 | 0.0 | 7.2 | 22.0 | |
Lanice conchilega | * | 0.0 | 0.0 | 11.3 | 34.9 |
Harmothoe imbricata | 0.0 | 0.0 | 1.5 | 4.4 | |
Mytilus edulis | ** | 0.1 | 0.3 | 148.4 | 417.2 |
Petricola pholadiformis | 0.0 | 0.0 | 0.8 | 1.9 | |
Asterias rubens | ** | 0.6 | 1.0 | 66.5 | 116.7 |