Fig. 4

Principal Coordinate Analysis (PCoA) based on Bray–Curtis dissimilarity of sessile cryptobenthic communities for: (a) the 13 main cryptobenthic categories (dimensions 1 and 2 explaining 54% and 26% of the variance, respectively); (b) morpho-species (MSPs) contributing up to 95% of dissimilarities among ARMS (dimensions 1 and 2 explaining 19% and 11% of the variance, respectively). Arrows indicate the relative contribution of categories and MSPs to the dissimilarity between ARMS triplicates. Colours represent different immersion times (purple: 6 months, green: 1 year, orange: 2 years) while shapes denote deployment seasons (triangles: hot, circles: cool). Prefixes indicate taxonomic groups: Ascc = Colonial ascidian; Ascs = Solitary ascidian; Bry = Bryozoan; Cni = Cnidarian; For = Foraminiferan; Por = Poriferan.