Fig. 4

Bipartite site-cluster network, where clusters are groups of traits that frequently co-occur. Clusters are shown at the top as blue, numbered nodes. Each cluster corresponds to a group of co-occuring traits as listed in Table 2. Body sites are shown at the bottom as labeled, yellow nodes. Positive interactions (cluster common in body site) are represented by solid green lines and negative interactions (cluster uncommon in body site) are represented by dotted red lines. The strength of an interaction is represented by the with of an edge. See 16 for the same figure with positive and negative interactions separated out for ease of viewing