Figure 1. Original- and Trophic-Species Versions of the Chengjiang and Burgess Shale Food Webs.
Spheres represent taxa, elongated cones represent feeding links. Position of the taxa vertically corresponds to their trophic level (TL), calculated using the short-weighted trophic level algorithm [45], with basal taxa (primary producers and detritus) shown at the bottom of the network in red, and highest trophic level taxa at the top in yellow. S: number of taxa (nodes) in the webs. L: number of trophic links. C: connectance; L/S2. MaxTL: maximum trophic level of a species in the web. Images produced with Network3D software written by R. J. Williams; contact ricw@microsoft.com for more detail.