Eunotia desmogonioides Metzeltin & Lange-Bertalot (2002: 27)

Eunotia desmogonioides Metzeltin & Lange-Bertalot (2002: 27)

Fig. 4 View FIGURE 4 : T

Length: 58.5–140.6 µm; 4.4–6.6 µm; striae: 15–17 in 10 µm (n = 34)

Teratological form: deformed valve outline, undulated.

Occurrence: S3, S8.

Ecological characteristics: Cond.: 6.00–53.00 µS cm –1; BOD: 0.89–5.83 mg L− 1; COD: 4.68–17.50 mg L −1; N-NH: 200–680 µg L− 1; NO: 3 3 − 1 − 1 − − 1 − 1 0.32–7.50 mg L; DO: 7.66–14.62 mg L; pH: 5.79–7.09; PO: 0.004 –0.030 mg L; TP: 0.007 –0.017 mg L; TS: 11.00–66.00 4 mg L− 1; Temp.: 17.40–23.53 °C; Turb.: 7.03–13.70; Flow: 0.45–1.06 m 3 s; Average depth: 0.19–0.34 m; Prec.: 3.48–9.96 mm.

Metal concentrations: Co: 23.73–60.76 mg L –1; Cr: 27.33–88.85 mg L –1; Cu: 160.64–264.18 mg L- 1; Mn: 398.50–606.73 mg L –1; Ni: 27.57–73.27 mg L –1; Pb: 31.05–66.21 mg L –1; Zn: 78.97–173.12 mg L –1.