Fig. 2
Long-term (1973–2016) data series of biannual (late winter and late summer) estimates of Limecola balthica recruit densities on Balgzand, in nm−2 (means of 15 sampling sites). Densities assessed at three ages of the recruits of each cohort: (solid squares) in summer at an age of 0.3 year, (open circles) in winter at an age of 0.8 year, and (crosses) in summer at an age of 1.3 years