Gironde-Garonne- Dordogne watershed and coastal areas Irstea case-study Case study overview Surface: 80 000 km² over 20 departments Population density ~ 70 inhab./km² Marine protected area of the Gironde 2 cities of almost 1 million inhabitants estuary and Pertuis Land-uses: agricultural areas with charentais vineyards + forests High level of various pollutants Blayais nuclear power plant Main downstream obstacles The historical assemblage of diadromous fish is ‘almost’ intact, with charismatic species: the allis shad, European sturgeon, marine lamprey, and European eel Linking ecosystem services with the socio-economic system 1. List of ICONIC goods and 2. To identify the list of human activities services provided by diadromous species ü degrading freshwater ecosystems where goods and services are provided Overexploitation Provisioning: caviar, glass eel, Irrigated agriculture marine lamprey and allis shad Gravel extraction in rivers Cultural: lamprey recipe, shad PCBs pollution – banned consumption (eel) festival, lamprey brotherhood, Other pollutions (nitrate, cadmium (zinc industry)…) city emblems (Bergerac/ River connectivity loss / turbine mortality salmon, Royan/sturgeon…), Climate change/ smelt extirpation shad angling Introduced species Regulating: integrated in ü closely linked to the identified goods and services Fisheries (commercial and recreational), catering industry, Gironde estuary food web science and environmental management sectors… 3. Reasons to identify and monetary assess the ecosystem goods and services Enhance the conservation status of populations Improve the social dialogue around diadromous fish management Avoid in-silo management of natural resources …. Stories around diadromous fish in case study The fishery ban of allis shad since 2008 and decrease in the number of professional fishermen Fishery ban Castelnaud et al., 2001 « « » Castelnaud and Rochard, 1997 Stories around diadromous fish in case study The caviar exploitation and disappearance of the European sturgeon Castelnaud, 2011 Stories around diadromous fish in case study Stocking programme for the European sturgeon 1-year juveniles 2-year juveniles Number of juveniles released in the watershed + millions of larvae and younger juveniles since 2007 ADDRESS PHONE & EMAIL SOCIAL MEDIA Irstea – UR EABX [email protected] 50 avenue de Verdun +33 5 57 89 08 02 33612 Gazinet-Cestas #DiadESproject FRANCE @Irstea_Bordeaux .