Table 6 Average abundances of species contributing with high percentages to the dissimilarity between the disposal and the reference areas (SIMPER analysis, fourth-root transformed data of dredge samples, n=4 sites)
From: The impact of harbour sludge disposal on benthic macrofauna communities in the Weser estuary
Survey | Taxon | Average abundance (Individuals/m2) | Contribution (%) | |
|---|---|---|---|---|
Disposal area | Reference area | |||
August 1996 | Total dissimilarity 60.2% | |||
Praunus flexuosus | 14.5 | 4.8 | 6.9 | |
Schistomysis kervillei | 8.3 | 4.3 | 6.9 | |
Asterias rubens | 0.3 | 152.8 | 6.1 | |
October 1996 | Total dissimilarity 44.2% | |||
Balanus crenatus | 12.5 | 11.5 | 9.2 | |
Mytilus edulis | 0.0 | 15.5 | 7.3 | |
Gammarus salinus | 42.5 | 4.5 | 6.3 | |
April 1997 | Total dissimilarity 64.2% | |||
Crangon crangon | 1.8 | 21.8 | 6.6 | |
Mytilus edulis | 3.8 | 1.5 | 6.4 | |
Metridium senile | 0.5 | 20.0 | 5.0 | |