The effect of urban sewage on benthic macrofauna: A multiple spatial scale approach

► We analysed the spatial scales of variation of macrofauna under sewage discharges. ► Organic enrichment acts as an effective force in structuring the macrofauna. ► Variability was also determined by natural intrinsic forces at smaller scales. ► Distribution and occurrence patterns indicate a moderate eutrophication state. ► Waste management should consider spatial variability as a tool for monitoring.