Table 2.

Bacterial OTUs present in all 16 of C. plocamia samples and also found in A. aurita (Weiland-Bräuer et al., 2015), along with potential functional niches based on best blast hits to characterized relatives.

Class	Order	Family	Genus species	Potential activities/enzymes	%ID	Accession	Otu ID
Alpha	Kordiimonadales	Kordiimonadaceae	Emcibacter nanhaiensis	Alkaline phosphatase1	91	NR_136430	Otu000185
	Rhizobiales	Bradyrhizobiaceae	Afipia birgiae	Nitrate reduction2	100	NR_025117	Otu000004
		Rhodobiaceae	Afifella pfennigii	Nitrogen fixation, sulfate reduction 3,4	90	NR_117117	Otu000011
	Rhodobacterales	Rhodobacteraceae	Phaeobacter caeruleus	Nitrate reduction, alkaline phosphatase5	99	NR_118542	Otu000051
	Rhodospirillales	Rhodospirillaceae	Thalassospira tepidiphila	Nitrate reduction, PAH degredation6	100	NR_041492	Otu000100
	Sphingomonadales	Sphingomonadaceae	Sphingopyxis flavimaris	Chemoorganotroph7	98	NR_025814	Otu000226
Beta	Nitrosomonadales	Methylophilaceae	Methylobacillus glycogenes	Methylotrophy8	93	NR_104760	Otu000039
		Nitrosomonadaceae	Nitrosospira multiformis	Chemolithoautotroph, ammonia oxidation, denitrification9	98	NR_074736	Otu000055
Gamma	Alteromonadales	Alteromonadaceae	Marinobacter nitratireducens	Nitrate reduction10	91	NR_136469	Otu000043
		Shewanellaceae	Shewanella aestuarii	Nitrate reduction, alkaline phosphatase11	97	NR_135728	Otu000001
	Chromatiales	Chromatiaceae	Thiorhodococcus minor	Sulfur oxidation, nitrogen fixation12	90	NR_116948	Otu000128
	Methylococcales	Methylococcaceae	Methylobacter tundripaludum	Methanotrophy, nitrogen fixation13	94	NR_042107	Otu000005
			Methylobacter tundripaludum	Methanotrophy, nitrogen fixation13	94	NR_042107	Otu000655
	Xanthomonadales	Xanthamonadaceae	Stenotrophomonas pavanii	Nitrogen fixation14	99	NR_118008	Otu000023
Delta	Desulfuromonadales	Desulfuromonadaceae	Pelobacter carbinolicus	Sulfur reduction15	79	NR_075013	Otu000008
Nitrospira	Nitrospirales	Nitrospiraceae	Nitrospira moscoviensis	Chemolithoautotroph, nitrite oxidation, ammonification16	84	NR_029287	Otu000015

(¹Liu et al., 2015; ²La Scola et al., 2002; ³Urdiain et al., 2008; ⁴Caumette et al., 2007; ⁵Vandecandelaere et al., 2009; ⁶Kodama et al., 2008; ⁷Yoon and Oh, 2005; ⁸Doronina et al., 2014; ⁹Norton et al., 2008; ¹⁰Vaidya et al., 2015; ¹¹Park and Jeon, 2013; ¹²Imhoff, 2005; ¹³Wartiainen et al., 2006; ¹⁴Ramos et al., 2011; ¹⁵Aklujkar et al., 2012; ¹⁶Ehrich et al., 1995).