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Table 1 Topological properties of the empirical species-species co-occurrence networks of bacterial and archaeal communities and their associated random network

From: Archaeal and bacterial communities assembly and co-occurrence networks in subtropical mangrove sediments under Spartina alterniflora invasion

Network properties Archaea Bacteria
Overall Mangrove Ecotone Cordgrass Mudflat Overall Mangrove Ecotone Cordgrass Mudflat
Empirical networks No. of original OTUs 300 300 300 300 300 300 300 300 300 300
Network size (nodes) 212 293 295 293 289 277 296 295 294 295
Sequence number 272,449 67,334 70,351 66,687 70,444 855,275 218,993 225,426 216,593 224,045
Links 1083 1700 2959 1824 2477 3721 4904 4298 3224 3952
Degree 10.217 11.604 13.281 12.451 17.142 26.866 33.135 29.139 21.932 26.793
Average clustering coefficient 0.504 0.39 0.377 0.399 0.46 0.544 0.56 0.527 0.468 0.528
Diameter 9 8 9 9 8 7 8 6 7 7
Density 0.048 0.04 0.045 0.043 0.06 0.097 0.112 0.099 0.075 0.091
Average path length 3.499 3.258 3.22 3.357 3.024 2.674 2.654 2.748 2.867 2.827
Modularity 0.52 0.544 0.512 0.53 0.549 0.39 0.382 0.399 0.455 0.419
R2 of powerlaw 0.87 0.383 0.607 0.44 0.459 0.659 0.338 0.439 0.352 0.519
Random networks Average clustering coefficient 0.048
(± 0.040)
0.040
(± 0.002)
0.068
(± 0.002)
0.042
(± 0.002)
0.060
(± 0.002)
0.097
(± 0.002)
0.112
(± 0.001)
0.099
(± 0.001)
0.075
(± 0.002)
0.091
(± 0.001)
Average path length 2.554
(± 0.005)
2.583
(± 0.003)
2.169
(± 0.002)
2.526
(± 0.002)
2.280
(± 0.002)
1.968
(± 0.002)
1.909
(± 0.001)
1.951
(± 0.001)
2.104
(± 0.002)
1.988
(± 0.002)
Modularity 0.245
(± 0.011)
0.228
(± 0.008)
0.161
(± 0.006)
0.218
(± 0.008)
0.178
(± 0.007)
0.130
(± 0.005)
0.112
(± 0.005)
0.123
(± 0.005)
0.151
(± 0.006)
0.131
(± 0.005)
  1. Random network was generated by rewiring all of the links with the same numbers of nodes and edges to the real network
  2. Modularity > 0.4 suggests that the network has a modular structure
  3. The number in the brackets indicates the standard deviation of mean topological properties values of the 1000 Erdös-Rényi random networks