Figure 1

Occurrences of (a) coralligenous outcrops and (b) maërl beds across the Mediterranean Sea, as extracted from the review work and used in the distribution models (see text for details).
Data sources are listed in the Supplementary References. Boundaries of point/line/polygon features of the data layers have artificially been enhanced so that very small-scale occurrences are visible on the illustrative maps shown here. As a result, surface areas covered by these habitats appear much larger than they are in reality (e.g. around Malta). These data layers are more accurately viewed within a Geographic Information System. Maps were created using ArcGIS software by Esri (Environmental Systems Resource Institute, ArcMap 10.1, (www.esri.com).