Fig. 4From: Initial nitrogen enrichment conditions determines variations in nitrogen substrate utilization by heterotrophic bacterial isolatesSubstrate utilization by groups of isolates from the initial enrichments on the twelve substrates used in the substrate assay (F(77, 3114) = 4, P < 0.001) depicted in a heat map. The color legend indicates the scaled scores from −0.25 to 2.00, with high and moderate substrate utilization shown as red and orange respectively, and the low and least substrate utilization shown as shades of yellow and green respectivelyBack to article page