Annual report 2020

All four main tree species beech, oak, spruce and silver fir generally produced a lot of seed (half or full mast depending on region and altitude). However, a small percentage of stands with low seed production (no mast) had also been reported.

Fig. 1: Map of observed and modelled seed production of Norway spruce (Picea abies) in 2020 (left). Observations of seed production along the altitudinal gradient (right).
Fig. 2: Map of observed and modelled seed production of silver fir (Abies alba) in 2020 (left). Observations of seed production along the altitudinal gradient (right).
Fig. 3: Map of observed and modelled seed production of European beech (Fagus sylvatica) in 2020 (left). Observations of seed production along the altitudinal gradient (right).
Fig. 4: Map of observed and modelled seed production of oaks (Quercus petraea, Quercus robur, Quercus pubescens) in 2020 (left). Observations of seed production along the altitudinal gradient (right).