Large-scale synchronization of annual recruitment success and stock size in Wadden Sea populations of the mussel Mytilus edulis L.

Table 1 Correlation matrix (showing Pearson r values) for long-term data series of mussel seed abundance in three areas: West (western half of Dutch Wadden Sea, subtidal), East (eastern half, tidal flats), and Balgzand (westernmost part of Wadden Sea, tidal flats)

For West and East, the averages of scores on a scale of 0.1 to 4 by Van Stralen (2002) and De Vlas (in letter and in Dijkema 1992) were used; for Balgzand, ¹⁰log transformed numerical (n + 1) densities (m⁻²) observed in August or March were used (scaling from ~0.2 to ~3). Pearson r values are shown with numbers of observations between brackets
*** p < 0.001