Table 1 Operational taxonomic units (OTUs) of archaeal 16S rRNA gene sequences from colonic digesta of piglets and finishers

1

1

28

Methanobrevibacter smithii

99.1

2

1

4

Methanobrevibacter millerae

98.7

3

1

3

Methanobrevibacter millerae

98.1

4

2

7

Methanobrevibacter millerae

98.6

5

1

8

Methanobrevibacter boviskoreani

99.4

6

2

5

Methanobrevibacter millerae

98.2

7

1

27

Methanomassiliicoccus luminyensis

86.6

8

1

1

Methanobrevibacter ruminantium

96.9

9

1

2

Methanobrevibacter boviskoreani

99.7

10

2

11

Methanobrevibacter millerae

98.3

11

1

16

Methanomassiliicoccus luminyensis

84.6

12

1

4

Methanobrevibacter ruminantium

96.4

13

1

3

Methanobrevibacter ruminantium

97.7

14

2

18

Methanobrevibacter millerae/Methanobrevibacter smithii

96.7

15

1

15

Methanomassiliicoccus luminyensis

88.0

16

1

1

Methanobrevibacter millerae

95.5

17

4

33

Methanomassiliicoccus luminyensis

88.2

18

1

2

Methanomassiliicoccus luminyensis

87.3

19

1

8

Methanomassiliicoccus luminyensis

84.3

20

2

5

Methanomassiliicoccus luminyensis

87.4

21

1

2

Methanobrevibacter millerae

96.1

22

1

5

Methanobrevibacter gottschalkii

97.9

23

1

4

Methanobrevibacter gottschalkii

97.5

24

1

1

Methanobrevibacter gottschalkii

97.6

25

5

33

Methanobrevibacter millerae

98.4

26

9

23

Methanobrevibacter millerae

97.8

27

4

14

Methanobrevibacter gottschalkii

98.3

28

10

59

Methanobrevibacter ruminantium

98.9

29

1

19

Methanomassiliicoccus luminyensis

86.7

30

100

353

Methanobrevibacter millerae/Methanobrevibacter gottschalkii

98.6

31

6

52

Methanobrevibacter olleyae/Methanobrevibacter millerae/Methanobrevibacter smithii

96.1

32

1

9

Methanobrevibacter gottschalkii

98.3

Totals

168

775