Craticula riparia (Hustedt) Lange-Bertalot (1993: 14)

Fig. 10: Z

Length: 36.8–37.8 µm; width: 8–8.2 µm; striae: 21–22 in 10 µm (n = 4)

Teratological form: deformed valve outline, slightly undulated.

Occurrence: S3.

Ecological characteristics: Cond.: 53.00 µS cm –1; BOD: 1.49–3.27 mg L− 1; COD: 7.23–8.08 mg L− 1; N-NH: 316–378 mg L− 1; NO: 0.37 3 3 − 1 − 1 − − 1 − 1 − 1 mg L; DO: 11.42–14.57 mg L; pH: 5.79–6.19; PO: 0.006 –0.008 mg L; TP: 0.010 –0.017 mg L; TS: 38.00–66.00 mg L; 4 Temp.: 17.37–17.50 °C; Turb.: 7.03–10.70; Flow: 0.47 m 3 s; Average depth: 0.19–0.23 m; Prec.: 9.96 mm.

Metal concentrations: Co: 23.73–47.24 mg L –1; Cr: 27.33–80.86 mg L –1; Cu: 160.64–235.49 mg L- 1; Mn: 398.05–444.52 mg L –1; Ni: 27.57–69.89 mg L –1; Pb: 35.58–66.21 mg L –1; Zn: 78.97–167.31 mg L –1.