Indian Ocean nitrogen fixation

Bryceson, I. (1980). Nitrogen fixation and autecology of Oscillatoria erythraea (Ehrenberg) Kuetzing, a planktonic cyanophyte from the coastal waters of Tanzania A preliminary investigation. In Symposium on Coastal and Marine Environment of the Red Sea, Gulf of Aden and tropical western Indian Ocean. Karotoum, Sudan. 

Figure 9 Comparison of the correlation of natural a C with silicate (A) and potential alkalinity (PALK = [alkalinity+ nitrate] x 35/salinity) (B) using the GEOSECS global data. Samples from high southern latitudes are excluded from the silicate relation. The presence of tritium was used to surmise the presence of bomb-A C. The somewhat anomalous high PALK values from the Indian Ocean are from upwelling-high productivity zones and may be influenced by nitrogen fixation and/or particle flux.

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