Final composition of Eucampia antarctica and Proboscia inermis cells, and calculated nutrient uptake ratios under different conditions (control, + EDC dust, +FeCl3).

Mean values are shown, calculated from 5 replicate bottles, ±1 SD. Nutrient uptake ratios were calculated from the reduction in nutrient concentration in solution from beginning to end of experiment (see Table 1). Statistical difference from the control was tested with Analysis of Variance (ANOVA; see Methods), and p values and Least Significant Difference (LSD) are shown.