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Specificity in the spine microbiome between sea urchin species. (a) Community similarity of the spine bacterial communities of seven sea urchin species, as estimated by unweighted UniFrac for membership (left) and weighted UniFrac for composition (right). (b) The corresponding diversity estimates via phylogenetic diversity (left) and dominance (right) as well as (c) phylum-level profiles of the bacterial communities. (Online version in colour.)
