TABLE 1.
List of the most abundant 21 ZOTUs in the pooled dataset with the relative abundance of sequences, taxonomic identification, GenBank accession number of the nearest neighbor (NN), similarity (%-S) with NN, the location of where NN was reported, GenBank accession number and the identification of the nearest named neighbor (NNN), and similarity (%-S) with the NNN.
| OTU ID | Relative abundance (%) | Group | GenBank accession no. of NN | %-S | Location of NN | GenBank accession no. of NNN | NNN | %-S |
| ZOTU_1 | 8.46 | Ciliophora: Litostomatea | MH008816.1 | 100 | Mangroves waters of Southern China | DQ487196.1 | Monodinium sp. HCB-2005 | 99.03 |
| ZOTU_2 | 6.05 | Ciliophora: Spirotrichea | KJ762428.1 | 100 | Arctic Ocean | KY980391.1 | Strombidium caudispina | 99.73 |
| ZOTU_3 | 4.48 | Stramenopiles: Chrysophyceae | EU545792.1 | 99.22 | Surface layer sediments from the East Sea | JN934680.1 | Dinobryon faculiferum | 97.65 |
| ZOTU_9 | 3.31 | Cercozoa: Filosa-Thecofilosea | FN690368.1 | 100 | The Baltic Sea | DQ303924.1 | Protaspis grandis | 98.71 |
| ZOTU_8 | 3.16 | Stramenopiles: Bacillariophyta | MK003433.1 | 100 | Southern Ocean | KX253957.1 | Chaetoceros cf. socialis | 100 |
| ZOTU_5 | 3.09 | Ciliophora: Spirotrichea | FN689901.1 | 100 | The Baltic Sea | KY980423.1 | Strombidium paracapitatum | 99.73 |
| ZOTU_7 | 2.73 | Ciliophora: Spirotrichea | MK003050.1 | 100 | Southern Ocean | JX178818.1 | Pseudotontonia sp. JG-2011a | 100 |
| ZOTU_4 | 2.43 | Metazoa: Arthropoda | KJ761831.1 | 100 | Arctic Ocean | MK921834.1 | Calanus glacialis | 100 |
| ZOTU_6 | 2.36 | Stramenopiles: Bacillariophyta | KJ761954.1 | 100 | Arctic Ocean | MH843674.1 | Chaetoceros sp. | 100 |
| ZOTU_14 | 2.17 | Stramenopiles: MAST | HQ869375.1 | 100 | Saanich Inlet | KY980417.1 | Incisomonas marina | 89.43 |
| ZOTU_16 | 2.14 | Stramenopiles: Chrysophyceae | JF698787.1 | 99.74 | The Beaufort Sea | JN934680.1 | Dinobryon faculiferum | 96.87 |
| ZOTU_12 | 2.09 | Stramenopiles: Chrysophyceae | KT811095.1 | 100 | Subsurface ocean observatory in Isfjorden | JN934680.1 | Dinobryon faculiferum | 100 |
| ZOTU_17 | 1.84 | Ciliophora: Spirotrichea | KJ762448.1 | 100 | Arctic Ocean | KU525746.1 | Spirostrombidium apourceolare | 97.33 |
| ZOTU_18 | 1.68 | Chlorophyta: Mamiellophyceae | MF589928.1 | 99.47 | The Kandalaksha Bay, the White Se | JF794053.1 | Mamiellaceae sp. RCC2285 | 100 |
| ZOTU_13 | 1.69 | Stramenopiles: Chrysophyceae | EU545792.1 | 100 | Surface layer sediments from the East Sea | JN934680.1 | Dinobryon faculiferum | 97.91 |
| ZOTU_11 | 1.55 | Ciliophora: Oligohymenophorea | FN689919.1 | 100 | The Baltic Sea | HM030738.1 | Stokesia vernalis | 93.48 |
| ZOTU_19 | 1.45 | Metazoa: Ctenophora | HQ868938.1 | 100 | Saanich Inlet | MF599320.1 | Ctenophora sp. | 100 |
| ZOTU_10 | 1.39 | Ciliophora: Litostomatea | FN689995.1 | 99.36 | The Baltic Sea | MK056253.1 | Phialina caudata | 96.49 |
| ZOTU_23 | 1.19 | Stramenopiles: Chrysophyceae | MK003353.1 | 100 | Southern Ocean | EF165133.1 | Ochromonas sp. CCMP1899 | 99.74 |
| ZOTU_15 | 1.18 | Ciliophora: Spirotrichea | HM581790.1 | 100 | Central Arctic Ocean | KY290321.1 | Ptychocylis minor | 99.46 |
| ZOTU_25 | 1.00 | Chlorophyta: Mamiellophyceae | MF589924.1 | 100 | The Kandalaksha Bay, the White Sea | KY682863.1 | Micromonas polaris | 100 |