Table 1 Coefficients of between-species Spearman correlation estimates of population densities (n m⁻²) of year classes in 4 bivalve species (Cerastoderma edule, Mytilus edulis, Mya arenaria and Limecola balthica) as assessed at an age of 0.3 year (in August of their first summer), 0.8 year (in February/March at the end of their first winter), and 1.8 year at the end of their second winter) for the 1973–2016 period (n = 44)

From: 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?