Frazão-Moreira, A. Ethnobiological research and ethnographic challenges in the “ecological era”. 19, 605-624. https://doi.org/10.4000/etnografica.4141 A. Frazão-MoreiraColonial and post-colonial Ecological knowledge ethnobiology ethnography Nature colonial and post-colonial colonial e pós-colonial conhecimento ecológico ecological knowledge ethnobiology ethnography etnobiologia etnografia nature natureza