Figure 3.
Non-metric multidimensional scaling ordination of nitrifying communities based on presence/absence of operational taxonomic units (OTUs) defined by amoA RFLP patterns. □ = Jun 01; cultivated wetlands. ■ = Sep 12; cultivated wetlands. ○ = Jun 01; uncultivated wetlands. ● = Sep 12; uncultivated wetlands. Vectors show the direction and magnitudes of the correlation coefficient (r2) between NMS ordination axes and functional variables. The r2 for the correlation between functional variable and axis 1 and axis 2 are in parentheses (in the order r2 to axis 1, r2 to axis 2).