Fig. 5

Number of articles by built structure intervention characteristics: (A) context, (B) type, (C) material, and (D) proprietary name. Some articles contained more than one built structure intervention, so articles can appear in more than one category within each panel. “N/A” indicates the number of articles where the intervention characteristic was unspecified. Abbreviations for the proprietary names are defined as: HSAR = Hemispherical Shape Artificial Reefs, WAD = Wave Attenuation Device, SHED = Sheppard Hill Energy Dissipator, MARRS = Mars Assisted Reef Restoration System