French biologist specialized in lichens (taxonomy, biogeography, surveys, etc.) of western Europe, the Indian Ocean, and other areas in the intertropical area.

ID heatmap:
https://www.inaturalist.org/observations/map?ident_user_id=rpo#2/50.891/53.477

Obs heatmap:
https://www.inaturalist.org/observations/map?user_id=rpo#2/50.891/53.477