Nitzschia palea (Kützing) W. Smith (1856: 89)

Nitzschia palea (Kützing) W. Smith (1856: 89)

Figs 11 View FIGURE 11 : D–F

Length: 23.6–31.8 µm; width: 3.3–3.7 µm; striae: 10–15 in 10 µm (n = 3)

Teratological form: deformed valve outline, with asymmetry of the apical axis, or constriction near the apex.

Occurrence: S3.

Ecological characteristics: Cond.: 50.00–52.00 µS cm –1; BOD: 0.77–9.90 mg L− 1; COD: 1.70–24.32 mg L− 1; N-NH: 200–540 µg L− 1; − 3 NO: 1.00– 9.69 mg L− 1; DO: 8.19–8.98 mg L− 1; pH: 6.80–6.93; PO: 0.007 –0.010 mg L− 1; TP: 0.010 –0.015 mg L− 1; TS: 41.00– 3 4 48.00 mg L− 1; Temp.: 20.35–23.62 °C; Turb.: 8.40–10.6; Flow: 0.66–2.78 m 3 s; Average depth: 0.25–0.29 m; Prec.: 4.96–9.96 mm.

Metal concentrations: Co: 23.73–47.24 mg L –1; Cr: 28.46–85.16 mg L –1; Cu: 160.64–259.07 mg L- 1; Mn: 419.46–465.70 mg L –1; Ni: 27.57–69.89 mg L –1; Pb: 35.93–66.21 mg L –1; Zn: 78.97–151.46 mg L –1.