Abstract Dominant height growth is an essential parameter for forest management decisions and to estimate potential site productivity. Yet, site indices were still unavailable for European beech (Fagus sylvatica L.) on highly productive sites in western Serbia. To represent dominant height growth trajectories of beech across an environmental gradient in western Serbia, we have tested seven polymorphic derivations of the Generalized Algebraic Difference Approach. Calibration and verification were carried out on independent data sets, consisting of data from the growth reconstruction of 52 dominant trees in 66 permanent sample plots. The Chapman–Richard’s derivation was the most suitable model singled out in a three-step procedure, including biological plausibility and model accuracy indicators. The numerical and graphical exploration of residuals revealed that applied autoregressive and variance modelling have solved heteroscedasticity and autocorrelation problems. The ideal reference age for height predictions was determined to be 100 years. Comparative analysis with heights and site indices across Europe classifies the best sites in western Serbia as one of the generally most productive, where beech can reach heights of 40 m in 100 years. The vigorous height growth dynamics observed in a distinctly warmer and drier climate compared to the core of its distribution range indicate hight drought tolerance of beech in Serbia under current climate and an ability to maintain high productivity even in less favourable conditions.
Kazimirović et al. (Fri,) studied this question.