Oct 30, 2023
Long-term growth decline not reflected in crown condition of beech

Beech crown
European beech, which is the dominating deciduous tree species in large parts of Central Europe, suffered from the 2018-2020 drought. Amongst others, losses in crown vitality were observed. Interestingly, crown condition of individual trees within stands was found to differ strongly from non-/weakly damaged (referred to as vital) to severely damaged/dead (non-vital) trees. To check whether similar differences in tree-growth behavior exist, and whether differences in crown condition are genetically driven, a dendroecological and forest genetic study was performed in nine hotspots of beech decline in Germany. Results are now published by Ernst van der Maaten and co-workers in Forest Ecology and Management. Long-term growth decline was found irrespective of crown condition, and no consistent differences between non-/vital trees were detected in growth and genetic parameters. Overall, the study highlights that crown condition after an extreme drought is a poorer indicator of tree vitality than ring width in beech.