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Table 3 Environmental variables across habitat types. Mean values and range

From: Environmental determinants of distribution of freshwater snails and trematode infection in the Omo Gibe River Basin, southwest Ethiopia

VariableRiver/stream n = 100Wetland n = 10Lake n = 10Dam n = 5Irrigation canal n = 5
Water temperature (°C)23.9 (18.9–33.8)27.4 (21.6–33.8)28.4 (25.7–34.7)26.4 (23.7–31.3)25.7 (25.5–25.8)
pH7.2 (5.3–9.1)7.3 (76.5–9.1)7.9 (6.8–9.3)6.6 (5.9–7.1)7.6 (7.4–7.8)
DO saturation (%)61.0 (33.0–90.0)63.0 (33.2–90.0)98.9 (39.2–376.0)61.4 (55.3–66.8)62.0 (60.0–65.0)
EC (μS/cm)181 (42–549)159 (74–327)225 (63–391)116 (107–131)231 (229–233)
Turbidity62.7 (3.7–545.0)53.5 (14.6–171.0)227.0 (3.5–66.2)246.0 (89.0–297.0)62.6 (53.0–77.0)
PO43− (mg/L)0.30 (0.00–2.12)0.40 (0.01–1.30)0.12 (0.01–0.53)0.09 (0.00–0.15)0.75 (0.57–0.87)
Hardness (mg/L)40 (12–112)30 (12–92)51 (16–86)20 (16–26)76 (72–78)
Nitrate1.70 (0.00–41.00)0.98 (0.00–3.70)0.60 (0.00–2.26)1.50 (0.00–4.70)1.7 0 (0.96–2.20)
BOD5 (mg/L)13.6 (2.0–65.0)14.5 (7.0–24.0)16.0 (18.0–32.0)11.0 (9.0–14.0)37.0 (12.0–84.0)
% Pool57 (0–100)100 (100–100)100 (100–100)100 (100–100)61 (20–95)
% Riffle43 (0–100)0 (0–0)0 (0–0)0 (0–0)39 (5–80)
Grazing2 (1–3)3 (2–3)1 (1–3)1 (1–2)2 (1–3)
Farming2 (1–3)3 (2–3)1 (1–2)2 (1–3)2 (1–3)
Open Defecation2 (1–3)2 (1–3)2 (1–3)2 (1–3)2 (1–3)
Fishing1 (1–3)2 (1–3)1 (1–3)3 (2–3)1 (1–1)
Washing2 (1–3)3 (2–3)1 (1–3)2 (1–3)2 (1–3)
Bathing1 (1–3)2 (2–3)1 (1–3)2 (1–3)1 (1–2)
Swimming1 (1–3)2 (1–3)1 (1–3)2 (1–3)1 (1–1)
  1. pH logarithmic measure of hydrogen ion concentration, DO Dissolved oxygen, BOD5 Five day biochemical oxygen demand, EC Electric conductivity, PO43− Ortho-phosphate