Estimation and Uncertainty of the Mixing Effects on Scots Pine—European Beech Productivity from National Forest Inventories Data

摘要: An increasing amount of research is focusing on comparing productivity in monospecific versus mixed stands, although it difficult to reach a general consensus as mixing effects differ both sign (over-yielding or under-yielding) and magnitude depending species composition well site stand conditions. While long-term experimental plots provide the best option for disentangling effects, these datasets are not available all existing mixtures nor do they cover large gradients factors. The objective this study was evaluate uncertainties tree Scots pine–European beech stands along gradient conditions Europe, using models developed from National Regional Forest Inventory data. We found positive effect pine basal area growth, which slightly greater more humid sites. In contrast, negatively affected switched However, uncertainty analysis revealed that at mid- sites not-significant. Our results agree with studies European transect temporal triplets same pine–beech mixtures, confirming suitability methodology evaluating scale.