Correction to: Biogeochemistry https://doi.org/10.1007/s10533-018-0491-5

In the online and printed version of this article the Acknowledgements section omitted some information. Additionally, Figures 3 and 4 did not contain proper background shading to depict the life stages. The correct Figs. 3 and 4 and Acknowledgements section are provided.

Fig. 3
figure 3

Seasonal variations in iron speciation and AVS for a sulfate-amended and b unamended conditions on root surfaces. The gray bars in panels a and b indicate ferric iron and the black bars represent ferrous iron. Root AVS concentrations are shown by gray diamonds. The shaded background represents the seed production life stage. Error bars are omitted for clarity, but standard deviation is on average 33% of the mean

Fig. 4
figure 4

Plant response in sulfate-amended and unamended conditions; a seed count. b total seed mass. c total mass of nitrogen in seeds, d total plant nitrogen, calculated by summing nitrogen from seeds, stems, and leaves. Diamonds represent plants grown in surface water with 3.1 mM sulfate and squares represent unamended plants. The shaded background represents the seed production life stage. Error bars represent one standard deviation of four replicates