Heatmap showing Spearman’s rho values for significant correlations between weed abundances and bacterial classes (i.e., OTU data pooled at the class level; FDR-corrected P < 0.05). Heatmap showing Spearman’s rho values for significant correlations between weed abundances and bacterial classes (i.e., OTU data pooled at the class level; FDR-corrected P < 0.05). There were no bacterial classes that showed significant correlations with more than one weed species. Sean M. Gibbons et al. mSystems 2017; doi:10.1128/mSystems.00178-16