Figure 8: Representation of generalist and cosmopolitan OTUs within the global network and aggregated core.
From: Diversity, structure and convergent evolution of the global sponge microbiome
Frequency (density) distribution of degrees for the global bipartite network (dark grey) and the aggregated OTU cores (light grey) (a) and the proportion of OTUs with certain degree or higher present in both sets (b). In b, the x axis shows the proportion of OTUs in the global bipartite network, while the y axis shows the proportion of OTUs in the aggregated cores. The 1:1 line indicates the expected distribution, if degrees were evenly distributed across the global bipartite network and the aggregated cores. This analysis reveals an over-representation of generalist and cosmopolitan OTUs within the aggregated core, with the break occuring at k>12.
