Fig. 1
Examples of cuttings for two different spatial selection types (Aggregation area = 0 m2 (a–c) and 500 m2 (b–d)) and for two different harvesting intensities (Harvesting proportion = 33 % (a–b) and 100 % (c–d)). Trees are represented as grey circles of size proportional to their diameter at breast height (dbh). Cut trees appears in black and a cross highlights every target tree: all cut trees are target trees in the case of individual selection (and have been targeted because they were among the largest trees of the stand); whereas for group selection, only the trees which are in the center of a group are target trees (and have been targeted because they were surrounded by large trees). The large circles with a wider line in (b) and (d) symbolize the Aggregation area where all trees are cut around a target tree. The arrows in (b) and (d) point out the final groups cut: the harvesting operation was stopped during the formation of these groups because the target quantity to cut had already been reached