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Fig. 14. Graphical representation of a transect at a sampling station representative of highly exposed rocky bottoms. 1. Exposed
photophilic algae; 2. Cystoseira sp. beds; 3. Shade-loving algal communities dominated by Dictyopteris polypodioides and invertebrates;
4. Coralligenous outcrops invaded by Womersleyella setacea. Bathymetric transect: Jordi Corbera. Photos: E. Ballesteros

TABLE 2. Example of the information that can be obtained from a qualitative estimate of the invasive species present at each sampling
station monitored in Cabrera National Park (Spain) along the years. Source: E. Ballesteros et al.

Bursatella leachii. Photo: B. Weitzmann

Monitoring Marine Invasive Species in Mediterranean MPAs: A strategy and practical guide for managers 27