Fig. 6. Presence of pelagic viral populations in 63 deep trap samples grouped by the populations’ inferred depths of origin.

A population was considered present in a sample if it recruited reads across > 25% of its sequence (> 0 IQR coverage). Surface (5–75 m), deep chlorophyll maximum, 100–125 m), transition zone (150–250 m), mesopelagic (500 m), and bathypelagic (4000 m).