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Biofilm Consumption and Variable Diet Composition of Western Sandpipers (Calidris mauri) during Migratory Stopover

Fig 3

Proportion of large polychaetes, small invertebrates and surface sediment (biofilm) in Western Sandpiper diet based on dropping and prey samples collected during spring migration (23 April–7 May 2012).

A three source mixing model of δ13C and δ15N was used for eight study sites within the Fraser Estuary—Boundary Bay migratory stopover location: 1:a Mud Bay, 1:b Boundary Bay East, 2:c Roberts Ban: Inter-causeway, 2:d Roberts Bank Brunswick Point, 2:e Roberts Bank Westham Island, 3:f Sturgeon Bank South, 3:g Sturgeon Bank North, and 3:h Sturgeon Bank Iona.

Fig 3