  We investigate how initial and boundary conditions influence the competition
dynamics and outcome in dispersal-structured populations. The study is carried
out through numerical modeling of the heterogeneous Brownian bugs model, in
which individuals are characterized by diversified diffusion coefficients and
compete for resources within a finite interaction range. We observed that if
instead of being distributed randomly across the domain the population is
initially localized within a small region, the dynamics and the stationary
state of the system differ significantly. The outcome of the natural selection
is determined by different competition processes, fluctuations, and spreading
of the organisms.
