Average number of active nodes, 〈Nactive〉, as a function of mean μ of the interaction strengths of the connectivity matrix J, for different values of connectivity C and different variabilities in interaction strengths σ.

Here system size N = 100, and so 〈Nactive〉 = N = 100 in the figures reflect a network where no species becomes extinct. The insets show the collapse of the scaled 〈Nactive〉, with respect to μ − μc, where critical μc = 0.