Fig. 4From: Diversity and seasonality of Pseudo-nitzschia (Peragallo) at two North Sea time-series monitoring sitesPlots showing Pseudo-nitzschia cells L−1 as a % of the monthly averaged total diatom cell count at a Stonehaven and b Helgoland over the duration of the study. Pseudo-nitzschia cells are represented by a bar and the total diatom cell count by the solid line Back to article page