aliment (1) France (1) Food (1) Manufacturers' agents (1) Lakes (1) French (1) Food chains (Ecology) (1) Food (1) Commission merchants (1) Structure (1) Cadenas tróficas (1) Structure (1) Lac (1) Structure (1) Chaînes alimentaires (1) boucle (1) lac (1) Lac du Bourget (1) France (1)