A Structure Analysis for Ecological Management of Moist Tropical Forests

Figure 5

Knysna harvest control method. In each group of species, a threshold is defined. All the trees corresponding to basal area above the threshold will be removed. (a) basal area distribution over tree classes before the harvest, with normal basal area distribution superimposed (centre) and removable surplus (right). (b) The basal area of tree class I is less than the norm. This is compensated by a temporary increase of the norm in class II. The ingrowth into class I will be greater than normal so that the class I basal area will reach normality sooner. The surplus in tree classes III and IV will be harvested [16].

(a)

(b)