Correlation between nitrate production rates and amoA abundance.

Coefficients of determination (r2) for the correlation between the nitrate production rates and the number of amoA transcripts and genes. The coefficients were determined for the bacterial, archaeal or total summed amoA for either N-amended or non-amended treatments. The nitrate production rates were calculated as the net development in nitrate concentration between each sampling day during the experimental period. These rates are plotted against the amoA abundance on the last of the respective sampling days. The level of significance is indicated in superscript;NSNon-significant,*P ***P Correlation between nitrate production rates and amoA abundance.