Table 2. List of the 20 most abundant OTUs in the bathypelagic data set, with their number of pyrotags, OCC, taxonomic identification and similarity (%-S) with the CEM and the CCM.

OTU ID	Pyrotags	Occurrence	Group	CEM	%-S	CCM	%-S
146	45 261	27	Collodaria	GU825331	90.3	Collophidium ellipsoides	90.3
6539	29 099	27	Basidiomycota	HQ438183	99.0	Tilletiopsis minor	98.5
941	23 512	27	Chrysophyceae	JQ782092	99.8	Pedospumella encystans	98.3
3736	16 125	24	Spumellaria	EF172914	99.3	Cladococcus viminalis	96.0
2627	13 645	27	Dinophyceae	EU500130	100.0	Lepidodinium chlorophorum	99.0
309	11 748	27	Ascomycota	GQ120160	99.0	Engyodontium album	98.7
1730	11 131	27	Amoebozoa	FN598270	98.3	Platyamoeba contorta	90.5
2006	8958	20	Collodaria	JX194706	77.1	Collozoum serpentinum	85.1
2275	8364	25	Chrysophyceae	KC306509	98.0	Spumella danica	97.4
1165	8228	26	Collodaria	GU219126	99.4	Collophidium ellipsoides	94.2
2418	8151	27	Metazoa	KJ757289	99.2	Apolemia rubriversa	98.4
7646	6784	27	Chrysophyceae	HM749946	99.7	Paraphysomonas foraminifera	93.0
2825	5694	27	MALV-II	FN598288	100.0	Amoebophyra sp.	90.7
6489	5597	25	Collodaria	GU824572	82.4	Collozoum serpentinum	88.4
4675	4604	25	Chrysophyceae	KC306509	98.5	Spumella danica	98.0
3936	4472	21	Collodaria	GU825728	96.0	Collophidium ellipsoides	96.3
149	4404	20	Collodaria	AY046728	96.0	Collophidium ellipsoides	84.3
4324	3565	27	MALV-II	KJ762615	99.2	Amoebophyra sp.	89.5
5203	3552	15	Collodaria	GU824619	81.8	Collozoum serpentium	93.8
7437	2568	27	Amoebozoa	FN598227	97.9	Platyamoeba contorta	89.0

Abbreviations: CCM, closest cultured match; CEM, closest environmental match; OCC, occurrence; OTU, operational taxonomic unit.