The biological condition of French rivers has not improved over the last seventeen years according to the national Fish-Based-Index (FBI) | Knowledge and Management of Aquatic Ecosystems

Development of biological and environmental indicators and indices, testing and use

Open Access

Fig. 1

Map of mainland France distinguishing the reference (REFNET) and representative (REPNET) networks. The two networks share 125 sites in common. The French territory is divided in 6 hydrological districts (i.e., Northern district, Northeastern district, Seine Basin district, Atlantic district, Loire Basin district, Garonne Basin district, Rhône Basin district).

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