Table S1.
Metadata for the four Tara Oceans viral concentrates used in this study
| Metadata category | 22SUR | 39SUR | 39DCM | 67SUR |
| Latitude | 39.8386°N | 18.5918°N | 18.5839°N | 32.2401°S |
| Longitude | 17.4155°E | 66.6220°E | 66.4727°E | 17.7103°E |
| Oceanic region | Mediterranean Sea | Indian Ocean | Indian Ocean | S. Atlantic Ocean |
| Depth, m | 5 | 5 | 25 | 5 |
| Temperature, °C | 17.0 | 26.8 | 26.8 | 12.8 |
| Salinity, psu | 37.8 | 36.3 | 36.3 | 34.8 |
| Oxygen, µmol⋅kg−1 | 221 | 193 | 193 | 249 |
| Chlorophyll, mg⋅m−3 | 0.18 | 0.10 | 0.18 | 1.55 |
| Viral abundance in purified sample, total no. of viruses | 1.47 x 109 | 9.54 x 108 | 1.65 x 1010 | 1.34 x 1010 |
Sites are named by Tara Oceans station number (22, 39, and 67) and depth category (DCM, deep chlorophyll maximum; SUR, surface).