Fig. 8: Comparison of predicted N2 fixation rates in natural marine snow at three contrasting sites in terms of vertical distributions of O2 and NO3− in the ocean.
From: Quantifying nitrogen fixation by heterotrophic bacteria in sinking marine particles
a–c \({{\rm{O}}}_{2}\) minimum zone in the Eastern Tropical South Pacific (ETSP)55, d–f the Mauritanian upwelling zone in the North Atlantic Ocean (NAO)55, and g–i open ocean (OO; \({30.5}^{{\rm{o}}}\)N, \({52.5}^{{\rm{o}}}\)W)62,63. a, d, g \({{\rm{O}}}_{2}\) and \({{{\rm{NO}}}_{3}}^{-}\) concentrations in the upper 1000 m vertical water column. b, e, h \({{\rm{N}}}_{2}\) fixation rates per unit volume of water. c, f, i \({{\rm{N}}}_{2}\) fixation rates per unit volume of particle of different size classes.
