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?

Table 3 Coefficients of between-species Spearman correlations in various years of the 1979–2015 period for their seasonal weight gains between March and August (in g AFDM ind⁻¹)

The numbers of years (n) in each comparison is indicated between brackets, being the number of years in which the 2 species involved were sufficiently numerous at 4 or more out of the 6 sampling stations. Statistical significance indicated by **(p < 0.02)

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