Table 3. Sequential contribution of taxonomic ranks to differentiation of C, N and P substrate allocation and genomic features among imputed genomes.

Taxonomic rank	C:N:P allocation	Ribosome copy no.	COG count	Ccarb:arom allocation	Ndiss:assim allocation	Pscav:uptk allocation
Phylum	0.46	0.50	0.22	0.67	0.44	0.28
Class	0.79	0.68	0.49	0.87	0.80	0.71
Order	0.86	0.78	0.73	0.88	0.87	0.82
Family	0.91	0.90	0.85	0.94	0.94	0.87
Genus	0.95	0.96	0.96	0.96	0.96	0.93
OTU (resid.)	1.00	1.00	1.00	1.00	1.00	1.00

Abbreviations: COG, clusters of orthologous group; OTU, operational taxonomic unit. Data are R² values from ADONIS models of genomic features, partitioned sequentially by taxonomic rank levels. Taxonomic contributions to C:N:P allocation were calculated from distance matrices using C, N and P substrate allocation ratios jointly. Correlation coefficients were calculated using all taxa bins at each rank, by comparing Euclidean dissimilarity matrices of standardized z-scores of log-transformed C, N and P allocation ratios.