Erratum to: Biogeochemistry DOI 10.1007/s10533-012-9746-8

Incorrect graphs for Fig. 6 (total amount of amino sugar C and N processed) were published in the original article. The correct graphs are shown here.

Fig. 6
figure 6

Total amounts of a C and b N accumulated in the mineralized plus biomass pools in excess of control pools as a function of w/w % concentration of amino sugars added. Mat soils are denoted by filled symbols and non-mat soils are denoted by open symbols; NAG-induced responses are denoted by triangles and chitin-induced responses are denoted by squares. All data points are mean ± 1 SE; error bars are present on all data points but are not visible if the size of the corresponding mean symbol is larger than the SE value