Fig. 1: Fluctuation spectra in predator-prey systems.
From: Fluctuation spectra of large random dynamical systems reveal hidden structure in ecological networks
Left: a mixed community of species with randomly assigned predation relationships. Right: a model ecosystem with two trophic levels—200 predators and 800 prey species. In both cases fluctuations are illustrated via a typical single-species time series (ξ(t), upper) and the mean power spectra (ϕ(ω), lower), where circles are simulation results, and solid lines our theory. Parameters are: Nx = 200, Ny = 800, cx = 20, cy = 5, α = 10, b = 1, d = 1; full details of all simulations are found in Methods section.
