Supplemental Material Table S-1. Estimates of body masses of various animal species and sources of estimates of total number of microbes, with references. Body mass (wet weight, g) 1.40 x 10-6 Total number of microbes per individual animal 4.18 x 103 References This study nematode, Caenorhabditis elegans 4.75 x 10-6 5.00 x 103 32 hydra, Hydra vulgaris 8.70 x 10-4 2.67 x 104 Sebastian Fraune, 2014 personal communication Termite, Reticulitermes flavipes 3.00 x 10-3 2.70 x 106 11 planarian, Dugesia tigrina 4.04 x 10-3 4.86 x 105 This study firebrat, Thermobia domestica 3.00 x 10-2 1.00 x 109 15 Surinam cockroach, Pycnoscelus suranimensus 4.00 x 10-1 1.49 x 109 15 zebrafis, Danio rerio 4.38 x 10-1 3.07 x 107 This study cricket, Acheata domestica 4.31 x 10-1 2.25 x 109 15 Antarctic krill, Euphausia superba 4.86 x 10-1 4.60 x 108 31 American cockroach, Periplaneta americana 8.50 x 10-1 4.32 x 109 15 desert locust, Schistocerca sp. 1.80 x 100 5.3 x 107 15 earthworm, Lumbricus rubellus 1.89 x 100 1.83 x 108 29,30 Madagascar hissing cockroach, Gromphadorrhina portentosa 9.10 x 100 9.16 x 109 15 leech, Hirudo medicinalis 1.00 x 101 2.00 x 1010 28 mouse 2.50 x 101 1.10 x 1010 16, 22 hamster 1.15 x 102 2.20 x 1011 16, 22, 24 sea cucumber, Apostichopus japonicus 1.18 x 102 5.42 x 108 25-27 hydrothermal vent tube worm, 2.18 x 102 1.21 x 1011 23 Animal vinegar eel, Turbatrix aceti Riftia pachyptila guinea pig 9.25 x 102 9.00 x 1011 22 duck 2.00 x 103 1.80 x 1011 11 chicken 2.00 x 103 1.80 x 1011 11 dog 1.00 x 104 2.5 x 1013 16, 21 giant sponge, Xestospongia muta 1.00 x 104 8.00 x 1013 20 sheep 6.00 x 104 5.30 x 1014 11 goat 6.00 x 104 5.30 x 1014 11 human 6.20 x 104 7.00 x 1013 11 pig 1.30 x 105 5.20 x 1014 11 cow 4.00 x 105 2.20 x 1015 11 horse 5.00 x 105 1.30 x 1016 16,17 minke whale, Balaenoptera acutorostrata 4.10 x 106 8.50 x 1015 16, 18, 22 ox 6.60 x 106 2.53 x 1016 16, 17 2 Table S-2. Diversity indices calculated from MG-RAST data. Animal Species MG-RAST ID number animal wet weight (g) Base-pair count a Alpha diversityb Shannon -Wiener Index Evenness Simpson Index mosquito, Aedes aegypti 4441733.3 3.0 x 100 1.12 x 107 25.8 2.50 0.429 0.248 448.40 Drosophila melanogaster 4523275.3 1.00 x 103 2.00 x 106 18.1 2.39 0.635 0.131 47.08 flea, Oropsila hirsuta 4456086.3 1.00 x 103 1.90 x 105 16.1 2.53 0.592 0.177 72.01 termite, Nasutitermes sp. 4442701.3 3.00 x 103 6.15 x 107 711.4 5.26 0.765 0.022 1040.50 Ancistrotermes cavithorax 4536054.3 3.00 x 103 4.16 x 106 45.0 3.30 0.652 0.090 218.10 Mediterranean gutless worm, Olavius algarvensis 4441115.3 6.64 x 102 8.24 x 105 569.6 5.09 0.880 0.011 422.50 zebrafish, Danio rerio 4491276.3 4.40 x 101 2.41 x 106 17.6 2.67 0.559 0.127 134.36 green sea slug, Elysia chlorotica 4488654.3 5.00 x 100 2.62 x 106 130.7 4.29 0.779 0.024 247.22 mouse 4490253.3 2.50 x 101 5.19 x 105 53.9 3.47 0.766 0.044 95.02 giant snail, Achatina fulica 4480501.3 3.20 x 101 3.18 x 108 257.2 3.46 0.487 0.053 1342.9 wood rat, Neotoma lepida 4484865.3 2.36 x 102 2.92 x 109 681.1 4.71 0.510 0.062 10172.0 chicken 4440283.3 2.00 x 103 2.87 x 107 107.3 2.62 0.383 0.303 1000.7 trout 4524562.3 5.00 x 103 1.57 x 108 15.7 2.31 0.387 0.329 407.00 common carp 4449604.3 8.00 x 103 5.16 x 106 26.0 2.43 0.418 0.253 185.90 striped bass 4441695.3 9.50 x 103 4.76 x 106 136.7 3.82 0.590 0.066 711.00 Chao 1 Index termite, 3 turkey 4507782.3 1.00 x 104 1.62 x 106 94.2 3.71 0.713 0.050 227.00 dog 4444703.3 1.00 x 104 1.81 x 108 161.9 3.11 0.450 0.200 1040.5 python, Python bivittatus 4456431.3 4.54 x 104 3.79 x 105 52.2 3.03 0.680 0.100 91.25 human 4448044.3 6.20 x 104 1.90 x 109 439.3 4.28 0.565 0.056 2513.3 cow 4441681.3 4.00 x 105 3.30 x 107 172.4 3.78 0.551 0.146 1033.9 a MG-RAST post-quality-control total base-pair count Alpha diversity as calculated by MG-RAST is the antilog of the Shannon-Wiener index. It has units of number of species. b 4
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