Fig. 5From: The impact of harbour sludge disposal on benthic macrofauna communities in the Weser estuary Numbers of species and individuals per site, and diversity (H′) for the three surveys (grab samples; mean, with standard deviation indicated by black line; asterisks indicate significance according to Mann-Whitney U-test: *P<0.1, **P<0.05, ***P<0.01)Back to article page