Table 5

Dispersion of observations around their centroid in the reduced space generated by the NMDS analysis and the ratio of plant richness consumed to invertebrate richness consumed for each species. Average distances to centroids were calculated only for species with at least 5 analyzed samples. n.d.: not determined. BOU: Bouvaque, CLE: Cléry-sur-Somme, HAI: Hailles, MAI: Marais d'Isle, MOR: Morcourt, TVA: Trois Vaches.

  n Average distance from centroids Diet taxonomic richness Plants/Invertebrates ratio Main diet
Bird species Plants Invertebrates
Anas platyrhynchos 5 0.059 ± 0.013 12 3 4.0 Omnivorous
Ardea cinerea 3 n.d. 5 4 1.3 Piscivorous
Columba palumbus 7 0.045 ± 0.011 11 2 5.5 Herbivorous
Cygnus olor 3 n.d. 3 5 0.6 Herbivorous
Fulica atra 16 0.051 ± 0.012 11 9 1.2 Omnivorous
Gallinula chloropus 5 0.023 ± 0.005 5 3 1.7 Omnivorous
Phasianus colchicus 3 n.d. 7 3 2.3 Omnivorous
Turdidae 6 0.066 ± 0.008 12 4 3.0 Omnivorous
Sites            
BOU 14 0.035 ± 0.004        
CLE 11 0.069 ± 0.013        
HAI 4 n.d.        
MAI 11 0.049 ± 0.012        
MOR 5 0.060 ± 0.013        
TVA 3 n.d.        

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