Figure 1.

Comparison of the photometrically detected iron and aluminium content (n = 4) and pH value of soil water from Zygogonium AUT-p, Zygogonium SCOT-p and three different Austrian habitats containing a ‘green morph’ of Zygogonium, a mixture of Zygnema sp. and a ‘green morph’ of Zygogonium or Spirogyra sp. (n = 4 ± SD). Significant differences between the groups are indicated by lower case (iron content) or capital (aluminium content) letters. Data were analysed by one-way ANOVA followed by Tukey's post hoc test (P < 0.05).