eLTER H2020 Project, Grant/Award Number: 654359; Italian Ministry of University and Research, Grant/Award Numbers: CNR DBA.AD003.139, CNR DTA.AD003.474; National Research Council of Italy, Department of Biology, Agriculture, and Food Secures, Grant/Award Number: 71951
The effects of short‐term extreme events on tree functioning and physiology are still rather elusive. European beech is one of the most sensitive species to late frost and water shortage. We investigated the intra‐annual C dynamics in stems under such conditions. Wood formation and stem CO2 efflux were monitored in a Mediterranean beech forest for 3 years (2015–2017), including a late frost (2016) and a summer drought (2017). The late frost reduced radial growth and, consequently, the amount of carbon fixed in the stem biomass by 80%.