Does Slope Aspect Affect the Aboveground Tree Shape and Volume Allometry of European Beech (Fagus sylvatica L.) Trees?

In mountainous or hilly areas, the slope aspect affects amount of solar radiation, with direct consequences on species distribution and tree growth. However, little is known how shape volume allometry may be affected by contrasting environmental conditions driven aspect. This study aims to investigate whether aboveground European beech (Fagus sylvatica L.) trees. We used data scanned trees from two plots located south- respectively north-facing slopes and, additionally, an inventory dataset containing measurements diameter at breast height (D) (H). To differences in shape, we analysis covariance. assess allometry, first predicted each individual within using either model, then performed a paired t-test plot estimates based models. Since uncertainty originating allometric model predictions was likely affect results t-test, Monte-Carlo simulation rate null hypothesis acceptance t-test. The showed that growing were significantly thinner (p < 0.001), longer branching system 0.001) compared those south-facing slope. Correspondingly, per unit forest area vs. models different 0.001). total larger models, difference branch stem for These when only D as predictor volume. rates generally low. For estimated H, 1.79%. Nevertheless, predict volume, lower (i.e., 0.1%), suggesting addition H partly explains caused but not enough offset entirely. conclusion, has