Eunotia rhomboidea Hustedt (1950: 435)

Eunotia rhomboidea Hustedt (1950: 435)

Figs 5 View FIGURE 5 : E–G

Length: 28.5–59.1 µm; width: 5.5–5.9 µm; striae: 10–11 in 10 µm (n = 9)

Teratological form: deformed valve outline, with protrusion or bent of the valve.

Occurrence: S2.

Ecological characteristics: Cond.: 1.00–76.00 µS cm –1; BOD: 2.03–3.50 mg L− 1; COD: 4.79–27.60 mg L− 1; N-NH: 200–310 µg L− 1; NO: − 3 3 2.00– 2.53 mg L− 1; DO: 11.62–17.23 mg L− 1; pH: 5.11–5.79; PO: 0.05–0.323 mg L− 1; TP: 0.17–0.35 mg L− 1; TS: 61.00–83.00 4 mg L− 1; Temp.: 19.44–21.55 °C; Turb.: 1.09–4.73; Flow: 0.33–0.82 m 3 s; Average depth: 0.07–0.15 m; Prec.: 2.73–3.81 mm.

Metal concentrations: Co: 19.52–23.11 mg L –1; Cr: 25.92–78.24 mg L –1; Cu: 196.71–253.92 mg L- 1; Mn: 329.01–434.49 mg L –1; Ni: 33.21–84.74 mg L –1; Pb: 24.42–38.28 mg L –1; Zn: 78.35–182.64 mg L –1.