Figure 6. Relationship between species richness discriminated by beach zone occupied and environmental variables.

(A) salinity, (B) slope, (C) swash width and (D) Dean's parameter Ω. Beaches are numbered following Figure 1. Beach 2 was not included in D (see text for details). Statistical details of the models fitted are presented in Table S3. Crustaceans (2 species) and insects were included in the supralittoral category.