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Photo of the Year 2009

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FWM Featured Profile of the Month

Synodontis eupterus (Featherfin Synodontis)

WrittenBy: mostlycichlids

FWM Featured Article

FWM Featured Article
Written By:Wyomingite

Ammonia and Nitrites and Nitrates, Oh My!
A Quick and Dirty Overview of the Nitrogen Cycle

Nitrogen is an element essential to life. In its simplest form, it occurs as dinitrogen (N2), the major component of air. How it is converted to a chemical form usable to living organisms, the path it travels through biological processes, and how it is eventually returned to dinitrogen is the nitrogen cycle.

Nitrogen begins its journey into the realm of living organisms via a process known as nitrogen fixation. Fixation occurs mainly when microorganisms having the nitrogenase enzyme extract dinitrogen from the air and convert it to ammonia. These microorganisms may be free-living or may be symbiotic with plants. Regardless, the ammonia produced is quickly utilized by plants or other microbes and converted to proteins or other organic nitrogen compounds......Continue Reading

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