Table 4 Densities of the 15 most abundant species from grab samples in the disposal (n=12) and reference (n=12) areas (endobenthic and sessile epibenthic species only)
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 | 0.0 | 0.0 | 6.7 | 14.9 | |
Obelia longissima | 7.0 | 21.2 | 1.9 | 6.4 | |
Corophium volutator | 0.0 | 0.0 | 6.5 | 20.7 | |
Bathyporeia pilosa | * | 0.0 | 0.0 | 38.6 | 107.5 |
Balanus crenatus | * | 0.0 | 0.0 | 33.8 | 111.9 |
Eteone longa | 0.3 | 0.8 | 15.9 | 33.6 | |
Marenzelleria viridis | 18.3 | 32.9 | 43.7 | 108.3 | |
Nereis virens | 1.3 | 2.8 | 5.7 | 14.0 | |
Heteromastus filiformis | 64.7 | 118.7 | 18.7 | 24.0 | |
Tharyx killariensis | 0.0 | 0.0 | 3.1 | 7.5 | |
Nephtys caeca | *** | 2.5 | 7.4 | 11.0 | 15.6 |
Phyllodoce mucosa | 0.0 | 0.0 | 1.9 | 5.5 | |
Lanice conchilega | 0.0 | 0.0 | 1.4 | 4.7 | |
Macoma balthica | 12.0 | 17.1 | 12.2 | 16.1 | |
Mytilus edulis | 1.1 | 2.8 | 50.8 | 92.0 | |
Petricola pholadiformis | * | 0.0 | 0.0 | 20.8 | 41.3 |