Figure 4.

Similarity relationships amongst the S. adareanum microbiome samples in the Anvers Island Archipelago. (a) tmMDS of Bray–Curtis similarities of square root transformed ASV occurrence data representing the microbiome of the 63 S. adareanum lobe samples using the complete ASV occurrence profiles. Microbiome samples with significant levels of similarity are shown (see legend). (b) β-diversity across Anvers Island Archipelago sites represented by PERMDISP (9999 permutations) reveals differences between the highly persistent core, dynamic and variable portions of the S. adareanum microbiome (standard error shown). The degree of dispersion (variance) around the centroid changes significantly (p < 0.0001) for the different microbiome classifications. The lowest levels of dispersion are found in the core microbiome.