Closest Phylogenetic Taxa GenBank Acc. Abundance   from NCBI Number (n/%)a A Cyanobacteria     1 Uncultured Cyanobacterium HQ242211 1/1.20 2 Uncultured Cyanobacterium JF966676 1/1.20 3 Uncultured Cyanobacterium EU930687 1/1.20 4 Uncultured Cyanobacterium AM690936 6/7.23 5 Uncultured Cyanobacterium AB491631 2/2.41 6 Uncultured Cyanobacterium FJ352328 1/1.20 7 Uncultured Cyanobacterium GQ349130 1/1.20 8 Uncultured Cyanobacterium FM995186 1/1.20 9 Uncultured Cyanobacterium KC545747 1/1.20 10 Uncultured Cyanobacterium FJ763779 1/1.20 11 Uncultured Cyanobacterium EU780238 1/1.20 12 Uncultured Cyanobacterium JF966674 1/1.20 13 Uncultured Cyanobacterium EU800916 1/1.20 14 Uncultured Cyanobacterium HM057705 1/1.20 15 Uncultured Cyanobacterium AM259752 1/1.20 16 Uncultured Cyanobacterium HQ914635 1/1.20 17 Uncultured Cyanobacterium GU074287 1/1.20 B Alphaproteobacteria     18 Rhodobacter veldkampii NR043405 1/1.20 19 Shinella zoogloeoides NR041341 1/1.20 20 Shinella zoogloeoides NR041342 1/1.20 21 Rhodoplanes serenus NR040936 1/1.20 22 Anderseniella baltica NR042626 2/2.41 23 Skermanella aerolata NR043929 1/1.20 24 Oceanicola pacificus NR043915 1/1.20 C Betaproteobacteria     25 Methylibium petroleiphilum NR041768 1/1.20 26 Burkholderia ginsengisoli NR041288 1/1.20 27 Massilia lutea NR043310 2/2.41 28 Burkholderia cepacia NR041719 1/1.20 29 Methylophilus methylotrophus NR041257 1/1.20 30 Denitratisoma oestradiolicum NR043249 2/2.41 31 Burkholderia endofungorum NR042584 1/1.20 32 Massilia dura NR043307 1/1.20 33 Methylobacillus flagellatus NR043691 1/1.20 34 Hydrogenophaga pseudoflava NR028717 1/1.20 35 Azoarcus buckelii NR027190 1/1.20 36 Methylobacillus flagellatus NR043691 1/1.20 37 Hydrogenophaga taeniospiralis NR028716 1/1.20 38 Burkholderia cepacia NR041719 1/1.20 39 Methylobacillus flagellatus NR043691 1/1.20 D Gammaproteobacteria     40 Thioalkalivibrio denitrificans NR028745 1/1.20 41 Singularimonas varicoloris NR042175 1/1.20 42 Hydrocarboniphaga effusa NR029102 1/1.20 E Deltaproteobacteria     43 Desulfofaba fastidiosa NR025746 1/1.20 44 Desulfuromusa bakii NR026175 1/1.20 45 Geobacter thiogenes NR028775 1/1.20 46 Desulfuromonas alkaliphilus NR043709 1/1.20 47 Desulfuromusa bakii NR026175 1/1.20 F Firmicutes     48 Anaeroarcus burkinensis NR025298 1/1.20 49 Parasporobacterium paucivorans NR025390 1/1.20 50 Thermincola carboxydiphila NR043010 1/1.20 E Bacteroidetes     51 Flavisolibacter ginsengisoli NR041500 2/2.41 52 Owenweeksia hongkongensis NR040990 5/6.02 53 Flavobacterium sp NR040990 1/1.20 54 Perexilibacter aurantiacus NR041534 2/2.41 55 Robiginitalea myxolifaciens NR041514 1/1.20 56 Lishizhenia caseinilytica NR041043 1/1.20 57 Fluviicola taffensis NR041911 1/1.20 58 Haliscomenobacter hydrossis NR042316 1/1.20 H Actinobacteria     59 Streptomyces hebeiensis NR029091 1/1.20 60 Ferrimicrobium acidiphilum NR041768 1/1.20 61 Ilumatobacter fluminis NR041633 2/2.41 62 Ferrimicrobium acidiphilum NR041798 2/2.41 63 Streptomyces hebeiensis NR029091 1/1.20 64 Ilumatobacter fluminis NR041633 1/1.20 65 Kitasatospora saccharophila NR041538 1/1.20 66 Patulibacter minatonensis NR041254 1/1.20 a = total of 83 clones

Table 2: Percent occurrences of bacterial phylogenetic groups in the bacterioplankton assemblage at Terrebonne Bay along the Gulf of Mexico.