Captions of the main text figures:
Figure 1: Network describing the interactions (lines) between species of Amazonian snakes (circles) and their food resources (triangle).
Figure 2: The number of categories of food resources consumed by different snake species is positively associated with the snake average body mass (slope = 1.41, R2 = 0.46, p < 0.01) in a network of interactions between Amazonian snakes and their resources. Each point represents a species and the colors represent the different snake families. To avoid overlap, some points have been slightly offset from their original position on the x-axis.
Figure 3: In simulations of species removal, changes in the level of nestedness are positively associated with the snake average body mass of the removed species (slope = 0.40, R2 = 0.37, p < 0.01). Note the stronger, negative changes on nestedness are associated with Boidae snakes (red).
Figure 4: The probability of the observed number of species of a given lifestyle in a given module of being reproduced randomly. Red color indicates higher frequency, with a 95% confidence interval.
Table 1: Relationship of the network structure analysis of interactions between Amazonian snakes and their food resources. S = snake species richness in the network; R = food resources richness (Note that with the removal of species from the network occurs the loss of interactions, which may reduce the number of resources); SD = average degree; C = connectivity; N = nestedness; Nrel = relative nestedness; M = modularity; Mrel = relative modularity; nM = number of food modules.