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Fig. 4. Fluxes of (a) SO2-4 from the deep profundal, (b) SO2-4 from the shallow profundal, (c) NO-2 + NO-3 from the deep profundal, (d) NO-2 + NO-3 from the shallow profundal, (e) NH+4 from the deep profundal, and (f) NH+4 from the shallow profundal sediments. The averages and standard error of the means are shown.