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. 2013 Jun 27;7(11):2192–2205. doi: 10.1038/ismej.2013.96

Figure 4.

Figure 4

Correlations between 15NO2− oxidation rates and (a and b) NO2− concentrations and (c) Nitrospina 16S rRNA gene abundance (ml−1) based on QPCR. In b, data points with>1 μM NO2− are not shown in order to show points near the axes. (d) Correlation between Nitrospina as a percentage of pyrosequencing libraries (vertical axis) and Nitrospina 16S rRNA gene abundance (ng-DNA−1) based on QPCR (horizontal axis). QPCR data are normalized per ng-DNA rather than per ml to reflect Nitrospina 16S rRNA genes as a proportion of community DNA.