Dose-dependent response of a benthic system to biodeposition from suspended blue mussel (Mytilus edulis) culture

► An in situ manipulative experiment is reported. ► Density-dependent effects on benthic parameters were non-linear. ► M-AMBI indicated that the benthic status changed from High to Good. ► Dose relationship identified with threshold between 200 and 400 mussels m−2.