Fig. 3

Effect of group size on stand production and heterogeneity, at different time scales. Here are presented nine indicators describing the simulation results obtained for the cutting aggregation experiment (Exp1). Each plot gives the relation between the Aggregation area parameter modalities (x axis) and one stand indicator (y axis), as observed after 50 years (squares), 100 years (circles), and 150 years (triangles), compared to initial values (dotted lines). a and b give information about living stock, c about regeneration, d to g about heterogeneity, and h and i about wood production. Each point represents the mean value calculated on the five simulations done for the given silvicultural modality, and error bars represents one standard deviation