Case Study “Kranzberger Forst”: Growth and Defence in European Beech (Fagus sylvatica L.) and Norway Spruce (Picea abies (L.) Karst.)

Choosing the comparative analysis of biomass partitioning of the two competing tree species, European beech and Norway spruce, with their contrasting crown architecture and foliage habit as a starting point, the outcome from an 8-year free-air canopy exposure experiment to an enhanced ozone (O3) regime is comprehended. The experiment had been employed for interfering with resource allocation according to the growth–differentiation-balance theory.