Table 1. Selected variables for characterising Lake Nakuru during the entire investigation period.

	Mean	Range
Temperature (°C)	25.1	21.6–30.3
pH	10.1	9.5–10.7
Conductivity (mS cm−1)	53.4	30.6–96.2
Salinity (‰)	35.7	19.2–62.1
Total alkalinity (meq l−1)	736	344–1482
SRP (μg l−1)	1361	74–5458
Viruses (ml−1)	4.8 × 109	1.2 × 109–7.0 × 109
Heterotrophic bacteria (ml−1)	1.8 × 108	5.0 × 107–3.1 × 108
VBR	27.1	10.0–48.6

Abbreviations: SRP, soluble reactive phosphorus; VBR, virus to bacteria ratio