Fig. 5.

Assemblage-level proportional grass consumption regulates trophic network structure. (A) Mean Pianka niche overlap index (r² = 0.76, F_1,15 = 46.89, P < 0.001), (B) bipartite network modularity (r² = 0.76, F_1,15 = 47.56, P < 0.001), and (C) bipartite network nestedness (r² = 0.62, F_1,15 = 24.77, P < 0.001) as functions of assemblage-level mean grass RRA across all bouts at seven well sampled sites. Error bars are ±1 SE; shading shows 95% CIs. We included all bouts at repeatedly sampled sites, owing to substantial within-site variability in the identity of species sampled and their mean grass RRA (Fig. 2 and SI Appendix, Fig. S5); in general, the across-site trends are also qualitatively evident within sites.