Non metric multidimensional scaling (n-MDS) plots using Bray-Curtis similarities for sponge assemblages in which singletons were excluded, showing collected from a) all raised geomorphic features, excluding an outlier at Station 63 from SOL4934 at which only one non-singleton species was collected (stress = 0.16) and b) raised geomorphic features at which sponges were collected from three or more sites in the western CMR (orange, numeric codes) and eastern CMR (green, alphabetic codes) stress = (0.014).

<p>Locations of each geomorphic feature are shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141813#pone.0141813.g001" target="_blank">Fig 1</a>. Each point on an MDS represents an assemblage collected at a site, and increasing distance between points indicates decreasing similarity.