The nitrogen cycle works to replenish nitrogen in ecosystems and it depends on several processes including the elimination of waste by organisms. In this lesson students will explore the components and processes of the nitrogen cycle and it’s relevance to living things.

NSF Grant Collaborative Research: Determining rates of group-specific phytoplankton and bacterial uptake of inorganic and organic nitrogen by means of stable isotope techniques # 0961900.

Nitrogen Cycle Tutorial

Dr. Wawrik & The Nitrogen Cycle in Marine Ecosystems