Table 4.

Summary of key findings in differences between predicted metagenomes.

Functional group	Sample 1	Proportion of metagenome (%)	Sample 2	Proportion of metagenome (%)	p-value (corrected)
Carbohydrate metabolism	Captive	11.28	Wild	10.49	<0.001
	Grain-fed	11.51	Carnivore	10.85	<0.001
			Herbivore	10.68	<0.001
Infectious disease	Wild	0.50	Captive	0.43	0.002
Amino acid metabolism	Carnivore	10.86	Herbivore	8.52	<0.001
			Grain-fed	8.81	0.026
Signaling molecules and interaction	Faecal	0.16	Crop	0.20	0.017
			Cecum	0.25	0.006
			Ileum	0.23	<0.001
β-1,4-endoxylanase	Carnivore	0.019	Herbivore	0.008	0.01
β-xylosidase	Grain-fed	0.015	Herbivore	0.007	0.001
Xylanase	Herbivore	0.007	Grain-fed	0.002	<0.001

Comparisons are reported as column Sample 2 compared to the last entry in Sample 1. Gene abundances are reported as a relative proportion of the total predicted metagenomic content.