1 Supplementary Material 2 3 Table S1. Results from reverse line blot hybridization with 18 probes specific for freshwater bacteria. Probe a Targeted Group Affiliation Wuli Bay b Meiliang Bay b Mouth of Meiliang Bay b Aug. Sep. X X O O X O O O Lake Center b Aug. Sep. X X O O X O O O Aug. Sep. Aug. Sep. LD12 Alphaproteobacteria X X X X CRFL11 Alphaproteobacteria X X# O X LD28 Betaproteobacteria X X# X O Polynucleobacter sp. Betaproteobacteria O O O O (subcluster PnecC) Polynuc123d Polynucleobacter spp. Betaproteobacteria X X O X X X O X (subcluster PnecB and PnecC) PolynucD123-144e Polynucleobacter sp. Betaproteobacteria O O O O O O O O (subcluster PnecD) GKS98-442 GKS98 Betaproteobacteria O O O X O X O O Sta230-187 Sta2-30 (acI-B) Actinobacteria X X O X X# X X X Sta230-208 Sta2-30 (acI-B) Actinobacteria O X O X X# X X X Urk014-126 Urk-014 Actinobacteria X X X X X X X X ACK-M1-193 ACK-M1 (acI-A) Actinobacteria X X O X X X X X CL0-14-464 CL0-14 Verrucomicrobia O O O O O O O O Sta235-83 Sta2-35 Verrucomicrobia O O O O O O O O FukuN18-209 FukuN18 Verrucomicrobia X X X X X X# O X CL500-6-64 CL500-6 Bacteroidetes O O O O O X O X FukuN47-208 FukuN47 Bacteroidetes O O O O O O O O LD2-457 LD2 (SOL cluster) Bacteroidetes O O O O O O O O PRD01a001b-134 PRD01a001b Bacteroidetes O O O O O O O O a All probe sequences and working conditions except for CRFL11-135 have been shown in reference 53 (Wu et al., 2006). b X donates positive detection by the respective probes in all samples of an area (if not stated differently), whereas O refers to no detection. c The probe sequence is 5’-GTTGTTCCGTACCCCTAGG-3’. This probe was not included in TableS2 of the reference 53 (Wu et al., 2006) due to negligence. d Targeting a subgroup of subcluster PnecB and all members of subcluster PnecC except of three endosymbiotic strains. e Four strains belonging to subcluster PnecD are not targeted by the probe. The probe has one mismatch to sequences of all four strains. $ Two samples tested for East Bay. #Probe was only positive for two or one sample taken in the area. LD12-143 CRFL11-135 c LD28-451 Polynuc451 4 5 6 7 8 9 10 Littoral zone of Wuli Bay b Sep. O X O O 1 East Bay b,$ Aug. O O O O Sep. O O O O O O X O O X O X X X# X O O O O O O O O X X O X O O O X O O X O X X O X O O O X O O X 1 Table S2. Phylogenetic affiliations of cloned 16S rRNA gene sequences obtained from the East Bay library 2 representing the bacterioplankton community composition in the macrophyte-dominated environment. Groups Clones Actinobacteria TH3-91, 101 TH3-102 TH3-4 TH3-103 TH3-14, 37 TH3-15, 22 TH3-28 TH3-30 TH3-33, 94 TH3-40 TH3-60 TH3-61, 93 TH3-51, 68, 88 TH3-70 TH3-71 TH3-73, 85 TH3-80 TH3-84 TH3-2, 24, 29, 39,41, 49, 50, 72, 82, 99, 104 TH3-1, 6, 38, 52, 54 TH3-7, 25, 48, 63, 67, 76 TH3-5, 100 TH3-8, 53, 79 TH3-3 TH3-16, 20, 105 Gammaproteobacteria TH3-56, 92 Betaproteobacteria TH3-59, 78 TH3-97 TH3-45 TH3-87 TH3-62 TH3-34 TH3-64, 66 TH3-17 TH3-18 TH3-9 TH3-27, 55 Verrucomicrobia TH3-106 TH3-89 TH3-32, 75, 107 TH3-44 TH3-36 TH3-11 TH3-13 Alphaproteobacteria TH3-65 TH3-74 TH3-12 Planctomycetes TH3-86 TH3-90 Bacteroidetes TH3-47 TH3-69 TH3-81 Fibrobacteres TH3-98 Cyanobacteria TH3-10, 42, 46, 96 TH3-43 3 4 5 closest relatives ACC number Similarity (%) Freshwater clusters Sources Clone HTDD3 Isolate MWH-Dar Clone ML-3-48.2 Isolate Tsukamurella sp. Clone ST11-16 Isolate Actinomycetales GP5 Clone S9 Clone SV1-11 Clone ML-9-97.2 Clone sponge 8 Clone STH11-14 Clone P38.31 Clone PRD01a002B Clone NM3 Clone AKYG965 Clone S9D-06 Clone SV1-12 Clone S9F-09 Clone ML-9-87.2 AF418956 AJ565416 DQ520161 AY741505 DQ316361 AY145533 AJ575510 AJ575520 DQ520197 AY948357 DQ316359 AY752098 AF289150 AJ575536 AY922081 AB154303 AJ575521 AB154305 DQ520196 98 99 95 93 99 97 98 97 97-99 97 99 97-100 98-99 93 93 96-99 99 97 98 acTH-2** ¶ Luna1 $ Sta2-30 (acI-B) acII acII Sta2-30 (acI-B) Soil II+III## acTH-1** ¶ Luna1 acI-C acIV acIV-B acII Sta2-30 (acI-B) acTH-1** Particles FW* FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW Clone N4 Clone S4 Clone PRD18H10 Clone NO3 Isolate MWH-VicMua1 Clone R5 AJ575531 AJ575506 AY948072 AJ575556 AJ565417 AJ575501 99 97 98 99 96 97-99 Sta2-30 (acI-B) acIV-B## $ ACK-M1 (acI-A) ACK-M1 (acI-A) acII-A ACK-M1 (acI-A) Clone MRT-87 EF371492 99-100 - Isolate MWH-IPGL7W22 Isolate Ralstonia strain TA Isolate Ralstonia CH34 Isolate Acidovorox GPTSA100-27 Clone C1-A6 Clone DR-29 Clone 220ds20 Clone 17 up Clone EV818EB5CPSAJJ33 Clone P38.4 Clone 173ds20 AJ876403 DQ908951 CP000353 DQ854967 DQ676998 AY945920 AY212668 AY212631 DQ337037 AY752086 AY2126324 99 100 99 99 99 96 99 99 99 99 99 PnecB# - Clone aab56b01 Clone SLB624 Clone P38.38 Clone aab52e08 Clone LD29 Clone W4-B59 Clone ST11-29 DQ814962 DQ787718 AY752101 DQ815271 AF009975 AY345492 DQ501335 98 93 99 99 91 93 96 - Fish gut Sediment FW Fish gut FW FW FW Clone ML-7-85 Isolate Sphingmonas MTR-71 Isolate Sphingmonas P1S1 DQ520197 DQ898300 AJ620198 98 98 99 - FW Sediment FW Clone Liuu-5-192 Clone Dpcom243 AY509489 AY453254 97 96 - FW Sediment Clone CR99-2-72 Clone 207ds20 Clone SF33 AF429258 AY212653 AJ697700 96 99 98 PRD01a001b$ PRD01a001b$ FW FW FW Clone Green sulfur OPB56 AJ630296 95 - FW Isolate Cyanobium LBG2 Isolate Synechococcus OBB26S03 AF330249 AJ639899 98 99 - FW FW $ FW FW FW FW FW FW Estuary FW Soil Soil FW Soil FW FW FW FW FW FW ¶ * FW refers to freshwater. #Subcluster B of Polynucleobacter cluster (Hahn, 2003; Wu & Hahn, 2006). Zwart et al., 2002; Warnecke et al., 2004. Hahn et al., 2003. ##Allgaier and Grossart, 2006. ** Newly proposed cluster in this study. 2 1 Table S3. Phylogenetic affiliations of cloned 16S rRNA gene sequences obtained from the Meiliang Bay library 2 representing the bacterioplankton community composition in a phytoplankton-dominated environment. Groups Clone name Actinobacteria TH1-11 TH1-24 TH1-25 TH1-29 TH1-41 TH1-43 TH1-44, 49 TH1-65, 77 TH1-84 TH1-93 TH1-90, 95 TH1-86, 94 TH1-96 TH1-97 TH1-9, 13, 15, 16, 18, 34, 40, 42, 57, 66, 70 TH1-22, 61, 63, 89,91, 98 TH1-2, 7, 36, 51 Gammaproteobacteria TH1-32 TH1-3,64 TH1-17 TH1-21 TH1-35 TH1-39 TH1-87 TH1-73 TH1-88 TH1-46 Betaproteobacteria TH1-69 TH1-83 TH1-5, 59 TH1-38, 74 Verrucomicrobia TH1-67, 100 TH1-55 Alphaproteobacteria TH1-53 TH1-60 TH1-62 TH1-30, 76 TH1-19 Deltaproteobacteria TH1-8, 14 Planctomycetes TH1-12, 20, 56 TH1-10 TH1-27 Bacteroidetes TH1-82 TH1-50 Fibrobacteres TH1-4 Cyanobacteria TH1-45, 54, 80 TH1-1, 52, 71, 92 TH1-58, 85 Others TH1-31 TH1-99 TH1-23 3 # The closest relative Accession number Similarity % Freshwater Clusters# Isolate Mycobacterium sp. Clone S5 Clone P38.54 Clone ARFS-33 Clone Elev_16S_1332 Isolate Bacterium rJ7 Clone LT11OP1A8 Clone STH5-13 Clone ST5-1 Clone Elev_16S_634 Clone Sponge 8 Clone ST5-26 Clone Ihad10 Clone ML-9-97.2 Clone S4 AJ002094 AJ575507 AY752108 AJ277699 EF019953 AB021325 DQ444430 DQ316383 DQ316368 EF019399 AY948357 DQ316371 DQ648909 DQ520197 AJ575506 98 99 92 93 94 97 97 94 94 92 96-97 93-98 97 99 93-98 acTH-2** acIV-A acIV-B## acIV-D## acIV-D## Sta2-30 (acI-B) acIV-B## Clone ML-9-55.2 Clone ML-9-87.2 DQ520190 DQ520196 98-99 98-99 acIV acTH-1** Isolate Acinetobacter sp. Clone 88_17 Clone 91_11 Clone WD2124 Isolate Stenotrophomonas sp. Clone 91_18 Clone 86 Clone AH72 Isolate Acinetobacter WW21 Clone F5S6 DQ842493 AF467302 AF467306 AJ292676 AM402950 AF467295 DQ165130 AY963365 EF433555 DQ068810 96-99 99 99 99 99 99 96 95 99 98 - Soil Soil Soil Soil Sediment Soil Sediment Soil Soil Soil MWH-UniP4 Isolate Ralstonia sp. Isolate Leptothrix mobilis Clone C1-A6 AJ565422.1 AF280433 X97071 DQ676998 97 99 96-98 99 - FW Soil Soil Sediment Clone P38.38 Clone P38.12 AY752101 AY752089 96 97 FukuN18 FukuN18 Clone GKS2-215 Clone 53 Isolate Rhodobacter sp. Clone ML-3-64.2 Clone HTH6 AJ290032 DQ413112 AB251408 DQ520162 AF418965 95 99 98 92-96 99 LD12 Clone FAC87 DQ451526 91 - Soil Isolate Pirellula sp. Clone LT110P1D4 Clone ST11-26 X81940 DQ444439 DQ501334 98 96 98 - Particles FW FW Clone S1-4-CL9 Clone S9A-31 AY728066 AB154301 93 95 - Soil FW Clone ML-7-70.2 DQ520175 99 - FW Isolate Cyanobium LB03 Isolate Synechococcus PCC9005 Isolate Merismopedia sp. AY183115 AF216950 AJ639891 99 99 98-99 - FW FW FW Plastid Clone 655952 Clone LGD10 AY221720 DQ404824 AF047567 99 86 98 - FW Sediment Sediment name of freshwater bacterial clusters were the same as in Table S1. $ FW refers to freshwater. 3 Sources Sediment FW$ FW Rice paddy Soil Activated sludge FW FW FW Soil FW FW Soil FW FW FW FW FW FW FW SBR reactor Ditch FW FW