Table S2 The phylogenetic affiliation and distribution of the bacterial 16S rRNA gene sequences analyzed from the MTS library.

Phylogenetic group / Closest sequences/ microorganism / Acession no. / Identity (%) / Habitat of closest relative
Proteobacteria
Betaproteobacteria / Aquamonas fontana / AB120966 / 96% / Well water
Rhodoferax antarcticus / AY609198 / 96.63% / Lake Fryxell
Uncultured beta proteobacterium / JN037974 / 93% / Saline-alkaline soil
Uncultured beta proteobacterium / FJ946626 / 98% / Arctic meltwater
Uncultured beta proteobacterium / JQ278786 / 99% / Groundwater
Uncultured bacterium / HQ844547 / 98% / Michigan hollow
Ideonella sp. / AB211233 / 96.37% / Tomato rhizosphere
Sideroxydans lithotrophicus / DQ386859 / 99% / Rhizosphere of wetland plants
Uncultured Gallionella sp. / AB252929 / 99% / Iron-oxidation biofilm
Gammaproteobacteria / Uncultured gamma proteobacterium / JQ919640 / 90% / Gasoline-polluted soil
Uncultured gamma proteobacterium / JQ861301 / 98% / Peanut rhizosphere soil
Uncultured bacterium / HM557291 / 98% / Atta colombica colony N12 fungus garden bottom
Uncultured gamma proteobacterium / AB252884 / 97% / Iron-oxidation biofilm
Deltaproteobacteria / Uncultured delta proteobacterium / FJ535066 / 86% / Cave wall biofilm
Geobacter uraniireducens / CP000698 / 93% / Culture collection
Uncultured Syntrophus sp. / GU112190 / 97% / Biogas slurry
Uncultured bacterium / AF523969 / 98% / Forested wetland
Geobacter sp. / EF527234 / 80.67% / Aquifer
Uncultured delta proteobacterium / CU923361 / 97% / Mesophilic anaerobic digester
Anaeromyxobacter dehalogenans / EU331408 / 96.33% / Soil
Uncultured bacterium / DQ404765 / 97% / Contaminated sediment
Uncultured delta proteobacterium / FJ358874 / 86% / Marine sediment
Uncultured bacterium / JN038864 / 98% / Chongxi wetland soil
Bacteroidetes / Uncultured bacterium / HM066225 / 98% / Transition from fresh to saline water
Rhodothermus clarus / AB252420 / 81.41% / Terrestrial hot spring
Uncultured Bacteroidales bacterium / GU472709 / 97% / Lake Pavin (meromictic lake)
Uncultured bacterium / FM956254 / 99% / Rice field soil
Uncultured Bacteroidales bacterium / GU472715 / 97% / Lake Pavin (meromictic lake)
Uncultured Bacteroidetes bacterium / JQ919789 / 98% / Gasoline-polluted soil
Unclassified Cytophagales bacterium / FJ516902 / 94% / Upper sediment
Uncultured Alkaliflexus sp. / JX505328 / 96% / Soil
/ Uncultured Cytophagales bacterium / FJ517042 / 91% / Water
Uncultured Cytophagales bacterium / FJ516918 / 90% / Upper sediment
Uncultured Bacteroidetes bacterium / HQ003602 / 95% / Carrizo shallow lake
Uncultured Cytophagales bacterium / FJ517047 / 97% / Water
Uncultured Cytophagales bacterium / FJ516965 / 95% / Upper sediment
Uncultured Bacteroidetes bacterium / JN038271 / 95% / Petroleum-contaminated soil
Uncultured Flectobacillus sp. / HQ111157 / 85% / Embryonic stages
Uncultured Bacteroidetes bacterium / AY948068 / 95% / Temperate Rivers
Uncultured Bacteroidetes bacterium / GQ406154 / 95% / Sediment sample
Uncultured Bacteroidetes bacterium / JN038795 / 97% / Chongxi wetland soil
Uncultured Sphingobacterium sp. / AY510256 / 100% / Microbial mat in sulfidic cave spring, Lower Kane Cave
Uncultured Saprospiraceae bacterium / JN679085 / 92% / Membrane bioreactor
OP11 / Uncultured bacterium / AB186803 / 97% / Uncultured clone from polychlorinated dioxin dechlorinating microcosm
Uncultured candidate division OP11 bacterium / FJ485066 / 89% / Biomat
Uncultured candidate division OP11 bacterium / EF111145 / 92% / Bogota River
Uncultured candidate division OP11 bacterium / JQ726856 / 89% / Lake centre sediment of Lake Taihu
OD1 / Uncultured candidate division OD1 bacterium / JF344116 / 100% / Marine sediments
Uncultured candidate division OD1 bacterium / DQ676449 / 92% / Suboxic freshwater-pond bacterioplankton
Uncultured candidate division OD1 bacterium / FJ482175 / 92% / Lake Pavin
Uncultured candidate division OD1 bacterium / DQ676450 / 88% / Suboxic freshwater-pond bacterioplankton
Verrucomicrobia / Uncultured Verrucomicrobia bacterium / JN038865 / 96% / Chongxi wetland soil
Chthoniobacter flavus / AY388649 / 92.75% / Soil
Uncultured bacterium / GQ487913 / 98% / Soil polluted by heavy metals
Uncultured bacterium / EF019780 / 93% / Trembling aspen rhizosphere under elevated CO2 conditions
Uncultured Opitutus sp. / HQ674921 / 96% / Variably weathered outcrop
Planctomycetes / Uncultured bacterium / AB240234 / 93% / Bulk soil
Uncultured Planctomycetales bacterium / JN860331 / 88% / Hydrothermal environments
Uncultured planctomycete / JQ861370 / 91% / Peanut rhizosphere soil
/ Uncultured bacterium / FM956733 / 92% / Rice field soil
Uncultured planctomycete / HQ397057 / 91% / Haloalkaline soil
Uncultured planctomycete / EF074064 / 94% / Pasture
Uncultured Planctomycetales bacterium / JN860331 / 89% / Hydrothermal environments
Uncultured bacterium / HM346752 / 93% / Waterfowl lake sediment in Beijing Zoo
Chloroflexi / Uncultured bacterium / DQ067035 / 97% / Sediment of Lake Washington
Uncultured Chloroflexi bacterium / AY921738 / 98% / Farm soil adjacent to a silage storage bunker
Uncultured Chloroflexi bacterium / AY921737 / 99% / Farm soil
Uncultured Chloroflexi bacterium / JN86819 / 92% / Sediment of Lake Qianhu
Uncultured Anaerolineales bacterium / JN540144 / 90% / Soil
Uncultured bacterium / AB657920 / 98% / Rice paddy soil
Uncultured Chloroflexi bacterium / JN038753 / 89% / Chongxi wetland soil
Uncultured Chloroflexi bacterium / AB293397 / 95% / Anoxic rice field soil
Uncultured Chloroflexi bacterium / AB433089 / 90% / Sediment
Uncultured Chloroflexi bacterium / JN038753 / 89% / Chongxi wetland soil
Armatimonadetes / Uncultured candidate division OP10 bacterium / EF032775 / 93% / Cyanobacterial mat in Hawaii Volcanoes National Park lava cave
Uncultured bacterium / HQ385571 / 98% / Activated sludge
Spirochaetes / Spirochaeta sp. / X97096 / 94% / Environment
Uncultured bacterium / AB659122 / 94% / Rice paddy soil
Uncultured Spirochaetes bacterium / FJ484748 / 96% / Wall biomat sample in El Zacaton at 1,95m depth
Cyanobacteria / Uncultured bacterium / FJ502256 / 96% / Lake Cadagno
Uncultured Cyanobacterium sp. / JF733404 / 98% / Host: Simulium innoxium (black fly); male; larvae
Uncultured bacterium / FJ612403 / 99% / Lake water
Uncultured cyanobacterium / GQ347797 / 93% / Saanich Inlet, 10 m depth
Fusobacteria / Uncultured bacterium / GU451529 / 94% / Macroalgal surface
Cetobacterium sp. / JN033187 / 96% / Intestinal tract
Chlorobi / Uncultured bacterium / EU644261 / 96% / Active layer, low-centred polygon, near surface horizon; Rim_Top
Uncultured bacterium / HM243809 / 95% / Middle sediment from Honghu Lake
Uncultured Chlorobi bacterium / DQ676315 / 93% / Suboxic freshwater-pond sediment
Uncultured Chlorobi bacterium / DQ676339 / 89% / Suboxic freshwater-pond bacterioplankton
Uncultured bacterium / AY741703 / 94% / Borehole water from gold mine
Uncultured Chlorobi bacterium / FJ485067 / 92% / Biomat in El Zacaton at 114m depth
Nitrospira / Uncultured Nitrospirae bacterium / AB252945 / 100% / Iron-oxidation biofilm
Uncultured Nitrospirae bacterium / HQ003656 / 96% / Sediment of the Shallow Lake
Uncultured Nitrospira sp. / EF018579 / 92% / Trembling aspen rhizosphere
GN04 / Uncultured bacterium / FJ810541 / 99% / Coal tar waste-contaminated groundwater
KSB1 / Uncultured bacterium / EU246213 / 97% / Hypersaline microbial mat
Acidobacteria / Uncultured bacterium / EU135559 / 99% / Soil from an undisturbed mixed grass prairie preserve
Geothrix fermentans / GFU41563 / 94.08% / Aquifer
Uncultured Acidobacteria bacterium / JN038657 / 98% / Chongxi wetland soil
Uncultured Acidobacteria bacterium / HQ599046 / 96% / Woodland soil
Uncultured Acidobacteria bacterium / EU359920 / 98% / Soil
Uncultured Acidobacteria bacterium / EF562546 / 96% / Paper pulp column
Uncultured Acidobacteria bacterium / JN038974 / 97% / Chongxi wetland soil
Uncultured Geothrix sp. / JQ723625 / 98% / Reactor
Uncultured Acidobacterium sp. / FJ902569 / 96% / Red biomat sample
Uncultured Acidobacteria bacterium / HQ597366 / 98% / Grassland soil
Uncultured bacterium / EU528252 / 98% / Sediment
Firmicutes / Uncultured bacterium / AB661518 / 98% / Lake sediment
Uncultured bacterium / AB659063 / 95% / Rice paddy soil