Number,Genus,Degradation substrates,Cite,Relative abundance (%) 1,Desulfobacterium,Xylene,Chikere et al. 2011*,1.420 2,Desulfosarcina,Xylene/Toluene,Chikere et al. 2011*/Weelink et al. 2010*,0.883 3,Burkholderia,"Xylene and decane/toluene, Xylene/pyrene,phenanthrene,naphthalene",Bacosa et al. 2012/Lee et al. 2016/Seo et al. 2009*,0.633 4,Oceanicola,Naphthalene/Toluene ,"Hassanshahian and Boroujeni, 2016/Alain et al. 2012",0.330 5,Rhodopirellula,Hydrocarbons,Reyes-Sosa et al. 2018*,0.299 6,Ruegeria,Oil,"Ganesh Kumar et al., 2014",0.255 7,Roseovarius,PAHs,Yuan et al. 2015,0.170 8,Ralstonia,Toluene/Naphthalene,Chikere et al. 2011*/Seo et al. 2009*,0.132 9,Geobacter,Toluene,Chikere et al. 2011*,0.089 10,Leucothrix,crude oil,Chikere et al. 2011*,0.080 11,Rhodovulum,"Naphthalene, PAHs",Brown et al. 2015,0.076 12,Halobacillus,Toluene,Li et al. 2012,0.072 13,Deinococcus,Naphthalene and anthracene,Bisht et al. 2010,0.068 14,Bacillus,Naphthalene and anthracene/oil/pyrene,Bisht et al. 2010/Kostka et al. 2011/Seo et al. 2009*,0.067 15,Dethiosulfatibacter,PAHs,Muangchinda et al. 2013,0.062 16,Loktanella,Oil,Tremblay et al. 2019,0.062 17,Pseudoalteromonas,crude oil,Gontikaki et al. 2018,0.053 18,Winogradskyella,Oil,Liu et al. 2016,0.046 19,Pseudomonas,n-alkanes/Toluene/Fluorobenzoate,"Cameotra and Singh, 2008/Brusa et al. 2001/Oltmanns et al. 1989",0.042 20,Staphylococcus,Diesel/Phenanthrene,Chikere et al. 2011*/Seo et al. 2009*,0.036 21,Aquabacterium,n-alkanes,Masuda et al. 2014,0.035 22,Streptomyces,Alkanes,Chikere et al. 2011*,0.026 23,Thermococcus,N-alkanes (hexadecane),Mardanov et al. 2009,0.024 24,Planococcus,Alkanes and crude oil,Chikere et al. 2011*,0.024 25,Thermoleophilum,Alkanes,Chikere et al. 2011*,0.024 26,Sulfitobacter,crude oil,Gontikaki et al. 2018,0.022 27,Mesorhizobium,Hydrocarbons,Reyes-Sosa et al. 2018*,0.017 28,Halioglobus,Oil,Tremblay et al. 2019,0.014 29,Tropicimonas,"Alkanes, branched alkanes and alkylnaphthalenes",Harwati et al. 2009,0.013 30,Bradyrhizobium,Hydrocarbons,Reyes-Sosa et al. 2018*,0.010 31,Hyphomonas,Hydrocarbons,Reyes-Sosa et al. 2018*,0.009 32,Vibrio,Phenanthrene/oil,Chikere et al. 2011*/Kostka et al. 2011,0.009 33,Phaeobacter,Oil,Liu et al. 2016,0.008 34,Rhodococcus,"Cyclohexane and hexane/benzene, toluene, and ethylbenzene","Lee and Cho, 2008/Deep and Alvarez-Cohen, 1999",0.008 35,Cytophaga,crude oil,Chikere et al. 2011*,0.006 36,Lysinibacillus,Resins and asphaltenes,Xu et al. 2018,0.006 37,Maricaulis,PAHs,Yuan et al. 2015,0.006 38,Brevundimonas,SACs production,Reyes-Sosa et al. 2018*,0.005 39,Escherichia,Engine oil,"Abbas et al., 2018",0.005 40,Flavobacterium,Crude oil,Chikere et al. 2011*,0.005 41,Erythrobacter,PAHs,Yuan et al. 2015,0.004 42,Thauera,Toluene,Weelink et al. 2010*,0.004 43,Prolixibacter,Toluene,Li et al. 2012,0.003 44,Rhodobacter,Hydrocarbons,Reyes-Sosa et al. 2018*,0.002 45,Stappia,PAHs-degradation,Yuan et al. 2015,0.001