Local-scale correlations between consumer isotopic values (δ¹³C and δ¹⁵N), macroalgal richness components, and consumer diversity and abundance of the species.

Consumers A) P. purpuratus, B) E. peruviana, C) S. viridula and D) T. atra, and correlations are Pearson’s r, or Spearman’s r for green and brown richness and all local abundances. Superscript ‘c’ on the δ13C and δ15N denotes that the values have been corrected by size in attempt to remove putative ontogenetic shifts in trophic habits. Sites n = 18 for P. purpuratus and E. peruviana; n = 12 for S. viridula; n = 14 for T. atra. P-values shown as *** P < 0.001, *P < 0.05; d.f. corrected by Dutilleul et al. [58] method; values in brackets are standard non-spatial tests. Local-scale correlations between consumer isotopic values (δ13C and δ15N), macroalgal richness components, and consumer diversity and abundance of the species.