The dynamical properties of a cellular automata model of forest growth
are studied. It is shown that fractal and multifractal structures, as
well as power-laws (linked to both spatial and temporal variables) ar
e generated, involving the appearance of a self-organized critical sta
te. An extensive study of a real rainforest has been performed, and it
is found that the model recovers very well the results of the real ca
se. Some theoretical consequences are outlined.