Navicula cryptotenella Lange-Bertalot (1985: 62)

Navicula cryptotenella Lange-Bertalot (1985: 62) View in CoL

Fig. 10 View FIGURE 10 : M

Length: 18.9–35.2 µm; width: 5.6–6.6 µm; striae: 14–16 in 10 µm (n = 3)

Teratological form: deformed valve outline, with loss of transapical symmetry.

Occurrence: S2, S3.

Ecological characteristics: Cond.: 50.0–53.00 µS cm –1; BOD: 1.49–2.38 mg L− 1; COD: 8.08–13.60 mg L− 1; N-NH: 323–378 mg L− 1; 3 − 1 − 1 − − 1 − 1 NO: 0.34–0.37 mg L; DO: 14.57–14.80 mg L; pH: 6.19–6.26; PO: 0.005 –0.006 mg L; TP: 0.010 –0.016 mg L; TS: 10.00– 3 4 38.00 mg L− 1; Temp.: 17.37–17.68 °C; Turb.: 10.40–10.70; Flow: 0.47–0.62 m 3 s; Average depth: 0.19–0.24 m; Prec.: 9.96–11.17 mm.

Metal concentrations: Co: 22.67–33.57 mg L –1; Cr: 23.67–78.86 mg L –1; Cu: 197.55–235.49 mg L –1; Mn: 291.12–444.52 mg L –1; Ni: 31.80–69.89 mg L –1; Pb: 35.58–46.56 mg L –1; Zn: 93.81–167.31 mg L –1.