Table 2 HDP modeling outputs to test for neutrality in the meta and local communities (n = 89). Tests were carried out at different taxonomic resolutions. Theta: rate at which new individuals appear in the metacommunity through speciation; immigration: calculated by the HDP model; pN: probability of neutrality in the metacommunity; pL: probability of neutrality in the local community; lc: lower quartile; med: median; uc: upper quartile

 Phylum

2.5

3.9

5.7

4.7

10.7

21.9

0.49

0.0784

 Class

9.2

11.9

15.1

9.4

15.8

25.5

0.38

0.0012

 Family

47.7

54.4

62.1

20.5

28.3

38.5

0.21

0.0004

 Genera

158.5

172.5

187.7

28.9

37.8

48.9

0.0000

0.0004

 Actinobacteria

27.4

32.6

38.4

13.3

21.6

34.2

0.16

0.6

 Bacilli

14.9

19.0

23.9

3.7

7.7

14.9

0.16

0.8

 Betaproteobacteria

14.1

17.9

22.5

5.1

10.4

20.3

0.20

0.8

 Chloroplast

0.2

0.5

1.4

0.4

2.6

11.8

0.86

1.0

 Cyanobacteria

0.3

0.8

1.8

0.4

4.0

25.6

0.50

1.0

 Cytophagia

2.7

4.3

6.5

1.9

5.8

16.3

0.20

0.9

 Gammaproteobacteria

16.4

20.5

25.5

3.9

7.9

14.9

0.0024

0.3

 Genus: Pseudomonas

0.5

1.1

2.1

0.6

6.2

45.6

0.31

1.0