Dissimilarity matrix of potential prey species according to an analysis of similarity (ANOSIM).

<p>Upper numbers in cells of the lower triangle of the matrix depict the percentage dissimilarity of pair-wise comparisons according to a SIMPER analysis based on stable carbon and nitrogen isotope data. The letter and numbers in the lower part of the same cell depict the element which is most responsible for dissimilarity and the percentage of contribution of this specific element for explaining dissimilarity between pairs. Numbers in the upper triangle of the matrix depict the R- and P-value of pair-wise comparisons according to an ANOSIM. R-values range between 0 and 1 with values above 0.75 indicating separation of species pairs and values below 0.25 as barely separable species based on stable isotope ratios <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101917#pone.0101917-Clarke1" target="_blank">[34]</a>. Pairs of species with similar stable isotope signature are highlighted in bold (see text for exemptions) and prey categories are highlighted with colours: browser in green, grazer/high δ¹⁵N in yellow and grazer/low δ¹⁵N in blue.</p><p>Dissimilarity matrix of potential prey species according to an analysis of similarity (ANOSIM).