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Environmental Sciences Europe
Fig. 4 | Environmental Sciences Europe

Fig. 4

From: Evaluation of indicators for cyanobacterial risk in 108 temperate lakes using 23 years of environmental monitoring data

Fig. 4

Scatter plot for log10 (cyanobacteria + 1) and log10(TP) (Total phosphorus) for Swedish trend lakes (n = 108, 1995 to 2018). Quantile regression curves (0.05–0.99) using a fitted 3-parameter sigmoid nonlinear model are displayed. nls = nonlinear least square regression fit to mean of data. Thresholds relating to approximate WHO (1999) alert level 1 and 2 for drinking water are indicated together with thresholds relating to approximate low and medium health risk thresholds for recreational water

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