Fig. 4
From: Cyanobacteria and their secondary metabolites in three freshwater reservoirs in the United Kingdom
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12302-021-00472-4/MediaObjects/12302_2021_472_Fig4_HTML.png)
Chlorophyll-a concentrations and cyanobacteria cell counts (secondary y-axis) measured in a Ingbirchworth and b Tophill Low reservoir samples. Total cyanopeptide concentrations are plotted for comparison (additional y-axis on the left). Shaded areas highlight the biological data closest to the cyanopeptide data sampled on August 13th, September 3rd, and October 10th 2019