Fig. 2From: Is food supply for shellfish-eating birds in the western Wadden Sea affected by the between-species synchrony in year-to-year fluctuations of bivalve population parameters?Long-term (the 46 years 1973–2018) data series of annual abundance (sums of 4 species, in n m−2) of 0-group individuals observed on Balgzand (means of 15 fixed sampling sites) in late summer (solid points) and subsequent late winter (open points)Back to article page