Fig. 2.

Network structure of two empirical mutualistic networks from real data. A and B correspond to network $A$. C and D correspond to network $B$. The plants in A and C are marked as green, while the pollinators are marked as red. B and D are the matrix representations of networks $A$ and $B$, respectively. The blue blocks indicate that the corresponding pollinator and plant have a mutualistic connection. Column and row numbers correspond to individual plant and pollinator species. Species are ordered according to their number of interactions.