Our observations in the ETNA region (8°N–15°N, 19°W–23°W) suggest that Prochlorococcus and Synechococcus, the two ubiquitous non‐diazotrophic cyanobacteria with cellular N:P ratios higher than the Redfield ratio, create an environment of excess phosphate, which cannot be explained by diapycnal mixing, atmospheric, and riverine inputs.
Supplement to: Singh, Arvind; Bach, Lennart Thomas; Fischer, Tim; Hauss, Helena; Kiko, Rainer; Paul, Allanah Joy; Stange, Paul; Vandromme, Pieter; Riebesell, Ulf (2017): Niche construction by non-diazotrophs for N2 fixers in the eastern tropical North Atlantic Ocean. Geophysical Research Letters, 44(13), 6904-6913