Table 1

Information on sampling sites. The eight sampled marshes exhibit variations in their geographic location (rural or urban), anthropic usage and pound surface areas, providing insights into the diversity of habitats.

Site name Abbreviation Town Geographic location Geographical setting River Anthropic usage Total pond surface (ha)
Parc de la Bouvaque BOU Abbevile 50°6′59′′N, 1°50′34′′E Peri-urban Scardon Urban park, fishing 7.7
Marais de Cléry-sur-Somme CLE Cléry-sur-Somme 49°57′14′′N, 2°53′44′′E Rural Somme Waterfowl hunting, fishing 46.2
Marais de Hailles HAI Hailles 49°48′31′′N, 2°25′23′′E Rural Avre Waterfowl hunting, fishing 7.1
Marais de Long LON Long 50°1′36′′N, 1°58′33′′E Rural Somme Waterfowl hunting, fishing 63.0
Marais d'Isle MAI Saint-Quentin 49°50′36′′N, 3°18′22′′E Urban Somme Urban park, National Nature Reserve 14.6
Marais de Morcourt MOR Morcourt 49°53′47′′N, 2°39′53′′E Rural Somme Waterfowl hunting, fishing 12.4
Marais de Tirancourt TIR Tirancourt 49°56′23′′N, 2°10′52′′E Rural Somme Waterfowl hunting 9.2
Marais des Trois Vaches TVA Amiens 49°52′38′′N, 2°20′22′′E Urban Avre Urban park, fishing 12.0

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