Melissopalynological origin determination and volatile composition analysis of Corsican “chestnut grove” honeys

► Chestnut honeys were characterized by the occurrence of pollens from 91 taxa. ► Castanea sativa was the over-represented taxon. ► Main compounds of chestnut catkins were acetophenone, methyl salicylate and nonanal. ► Main components of honeys were 2-aminoacetophenone, benzaldehyde and acetophenone. ► Data analysis showed Corsican honeys distribution according to interannual climatic variation; honeybee foraging behaviour.