  We analyze the spatio-temporal patterns of two competing species in the
presence of two white noise sources: an additive noise acting on the
interaction parameter and a multiplicative noise which affects directly the
dynamics of the species densities. We use a coupled map lattice (CML) with
uniform initial conditions. We find a nonmonotonic behavior both of the pattern
formation and the density correlation as a function of the multiplicative noise
intensity.

Statistical Mechanics