Clustering of organisms can be a consequence of social behaviour, or of the response of
individuals to chemical and physical cues. Environmental variability can also cause
clustering: for example, marine turbulence transports plankton,,,,,, and produces chlorophyll
concentration patterns in the upper ocean,,. Even in a homogeneous environment, nonlinear
interactions between species,, can result in spontaneous pattern formation. Here we show
that a population of independent, random-walking organisms ('brownian bugs'), reproducing …

In the present work, we replicate the results of Young et al. 2001 “Reproductive pair
correlations and the clustering of organisms”[1], an analysis of the formation of aggre‐gates
in an otherwise homogeneous environment mimicking marine small‐scale hydro‐dynamics.
Using an individual‐based model of independent, random‐walking particles (also called
“Brownian bugs”), they show that reproduction by fission in a turbulent [2] and viscous flow
leads to the formation of elongated clusters. Spatial patterns therefore depart from the usual …