Table 3. Contribution of metabolic hierarchical system 1 to the dissimilarity of the hydrocarbon and agricultural impacted environments.

	Avg. Abundance
Metabolic Processes	Hydrocarbon- impacted	Agricultural- impacted	Diss/SD	Cum %
Cofactors, Vitamins, Prosthetic Groups, Pigments	0.08	0.19	1.67	12.09
Virulence, Disease and Defence	0.08	0.19	1.67	24.19
Phages, Prophages, Transposable elements, Plasmids	0.08	0.19	1.67	36.28
Fatty Acids, Lipids, and Isoprenoids	0.08	0.19	1.67	48.38
Iron acquisition and metabolism	0.84	0.79	1.76	54.29
Dormancy and Sporulation	0.71	0.67	1.4	58.92
Metabolism of Aromatic Compounds	0.87	0.84	1.82	62.37
Motility and Chemotaxis	0.83	0.8	1.67	71.84
Protein Metabolism	0.93	0.96	3.27	74.59
Carbohydrates	0.97	0.99	3.44	77.27
Nitrogen Metabolism	0.84	0.81	1.84	82.37
Regulation and Cell signalling	0.85	0.83	1.81	84.78
Amino Acids and Derivatives	0.96	0.98	2.35	86.73
Clustering-based subsystems	0.97	0.99	1.75	88.4

Average dissimilarity between the two groups is 2.08 %. Only metabolisms that were consistent (i.e. Diss/SD > 1.4) are shown here. The larger value in each case (i.e. the potential indicator of that condition) is shown in bold.

Cut-off percentage = 90% of total dissimilarity, Diss=dissimilarity; SD=Standard Deviation; Cum %=cumulative percentage of contribution to overall dissimilarity, Avg. Abundance values are reported for square-root transformed data