- Nitrogen fixation is a crucial process where atmospheric nitrogen gas (N₂) is converted into biologically available nitrogen compounds. - This process is carried out by specific microorganisms, primarily bacteria and archaea. - In aquatic ecosystems, cyanobacteria like Anabaena and Nostoc are major nitrogen fixers.
Which of the following organisms fix nitrogen in aquatic ecosystems ?
Asked in OPSC CS Prelims 2016 · Topic: Ecology (Biogeochemical Cycles: Carbon, Nitrogen, Phosphorus, Sulphur, Water)
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