Effects of spatial and temporal noise on a cubic-autocatalytic   reaction-diffusion model
  We characterize the influence that external noise, with both spatial and temporal correlations, has on the scale dependence of the reaction parameters of a cubic autocatalytic reaction diffusion (CARD) system. Interpreting the CARD model as a primitive reaction scheme for a living system, the results indicate that power-law correlations in environmental fluctuations can either decrease or increase the rates of nutrient decay and the rate of autocatalysis (replication) on small spatial and temporal scales. 
Jean-Sebastien Gagnon, David Hochberg, Juan Perez-Mercader
cond-mat.other