Dear Colleague, it is a pleasure to invite you to contribute to the session organized by Unit 1.01.07 during the IUFRO World Day. Our *Session topic*: *Natural and Old-Growth Fagus forests under global change: their unique role in climate mitigation and biodiversity conservation* will be open to all registered attendees worldwide. It will be split into t*wo sub-sessions*: *Sep 28th (8:45 AM UTC)* Focus "*Old-growth beech forests structure and attributes, with implications for the carbon cycle and biodiversity conservation*" *Sep 29th* *(10:00 AM UTC)* Focus "*Beech forest dynamics under global change*" Those of you wishing to contribute to the discussion with a short presentation about her/his research on the above topics (1-2 ppt slides, 1-2 minutes presentation) are invited to contact me by email (please specify the preferred date). It will be an opportunity for us to showcase the activities and expertise within our Unit and discuss future perspectives. Best regards, Alfredo Alfredo Di Filippo Professor in Plant Biology and Ecology National Geographic Explorer DendroLab, DAFNE, Università della Tuscia, Viterbo, Italy *alfredodifilippo.com <http://alfredodifilippo.com>* (WEB) *@AlfDiFi* (Twitter/FB/Instagram)