Table 3b

		Stomach			Ileum
Order	Genus	Low	Medium	High	Low	Medium	High
Clostridiales	*Clostridium*	3.5 (±1.3)^a	7.3 (±2.4)^ab	14.3 (±3.0)^b	11.9 (±3.7)^a	24.2 (±11.9)^ab	56.1 (±15.4)^b
Bacteroidales	Prevotella	6.0 (±2.1)	4.8 (±4.3)	4.3 (±4.0)	0.16 (±0.03)^a	0.09 (±0.12)^a	1.3 (±0.33)^b
Enterobacteriales	Citrobacter	0.50 (±0.32)^a	0.6 (±0.9)^a	1.86 (±1.3)^ab	1.1 (±1.7)^ab	0.53 (±0.43)^a	2.3 (±0.34)^b
	Enterobacter	2.6 (±0.4)^a	2.8 (±0.9)^ab	4.41 (±1.3)^b	1.5 (±1.4)^a	2.33 (±0.26)^a	4.3 (±0.2)^b
	Escherichia/Shigella	0.12 (±0.07)^a	2.1 (±1.4)^ab	2.8 (±0.8)^b	1.4 (±1.6)^a	6.3 (±2.2)^ab	8.1 (±1.9)^b
	Pantoea	1.3 (±1.1)	0.79 (±0.84)	1.2 (±0.6)	2.8 (±1.5)^a	2.8 (±0.86)^a	4.3 (±0.21)^b
Lactobacilliales	Lactobacillus	41.5 (±14.0)^ab	50.2 (±11.6)^b	30.9 (±8.5)^a	64.9 (±24.5)^b	49.3 (±15.7)^ab	2.3 (±0.28)^a
	Lactococcus	1.0 (±0.86)	2.3 (±0.48)	3.2 (±2.9)	0.10 (±0.04)	0.14 (±0.14)	0.03 (±0.01)
	Streptococcus	0.36 (±0.31)^a	0.25 (±0.19)^a	2.1 (±0.3)b	0.10 (±0.09)^a	0.42 (±0.37)^ab	1.3 (±0.1)^b
Pasteurellales	Actinobacillus	10.3 (±3.7)^b	8.4 (±2.2)^ab	4.1 (±1.3)^a	10.2 (±3.9)^b	2.7 (±2.8)^a	0.67 (±0.03)^a
Selenomonadales	Acidaminococcus	0.41 (±0.43)^a	1.6 (±0.44)^b	1.9 (±0.5)^b	0.12 (±0.07)^a	n.d.	0.28 (±0.07)^b
	Dialister	4.3 (±1.8)^b	0.21 (±0.09)^a	1.0 (±0.3)^a	0.11 (±0.05)^a	0.03 (±0.02)^a	2.7 (±0.9)^b
	Megasphaera	14.1 (±11.1)	13.7 (±8.6)	11.8 (±5.4)	1.1 (±0.6)a	0.24 (±0.07)^a	11.2 (±2.8)^b
	Mitsuokella	7.1 (±5.6)	4.9 (±2.9)	9.1 (±6.1)	0.35 (±0.29)^a	0.10 (±0.15)^a	2.3 (±0.5)^b
	Selenomonas	2.7 (±3.4)	1.0 (±0.8)	2.4 (±0.51)	0.51 (±0.10)^b	0.19 (±0.13)^a	3.5 (±0.6)^b
	Veillonella	2.1 (±1.5)	2.6 (±3.9)	0.39 (±0.46)	0.11 (±0.04)	0.43 (±0.33)	0.61 (±0.68)

a,b = significantly different within rows and intestinal segment (Mann-Whitney-U test; P ≤ 0.05)
1 = single value

Table 3b: Core microbiota in the small intestine of 53d old piglets fed diets with different dietary ZnO concentrations [% of total reads].