DIAMETER AT BREAST HEIGHT ESTIMATED FROM STUMPS IN Quercus frainetto IN THE REGION OF EVROS IN NORTHEASTERN GREECE

DIÂMETRO À ALTURA DO PEITO ESTIMADA A PARTIR DE TOCOS DE Quercus frainetto NA REGIÃO DE EVROS NO NORDESTE DA GRÉCIA

ABSTRACT

For foresters, it is sometimes required to estimate the diameter at breast height of tree that has been cut, though it is often only the stump that is available as an indicator of size, after illegal logging and quick removal of the cut trees from the forest. In this study, equations for predicting the diameter at breast height, were fit specifically for Quercus frainetto in the region of Evros in northeastern Greece. The selected equations (quadratic model) were, where is the estimated diameter at breast height d (cm), and d_st is the measured diameter at stump height (cm); for pure stands (R2 = 0.94); for mixed stands (R² = 0.92); for the whole forest (R² = 0.94).

Keywords:
Diameter at breast heigh; Diameter at stump height; Regression estimation