Fig. 6
From: Model performance of tree height-diameter relationships in the central Congo Basin
Stem density distributions (SDD) for Yangambi (a, b), Yoko (c, d), and Yambela (e, f). The SDD are plotted on log-log axes (a, c, e), on which relationships described as scaling functions would be linear, and on log-linear axes (b, d, f) on which relationships described as negative exponential functions would be linear. Diameter bins with stem densities of less than five individuals are shown as open circles and were excluded from the regression analyses. Model fits as described in Table 4 are shown