For three years, the Semois Valley National Park (PNVS) has been working to conserve biodiversity. To celebrate this anniversary, they organised a biodiversity symposium, which two members of the lab were pleased to attend. Kelly and Adèle presented the initial findings from their epiphytic bryophyte surveys, focusing particularly on bioindicators of old-growth forests. In the long term, the project will also aim to identify forest canopy structures that maintain a stable mic