Remaining n tied up in difficult to break down

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remaining N tied up in difficult to break down chemical structures
How does nutrient cycling differ in aquatic systems vs. terrestrial systems? Explain how seasonal changes in lakes and ponds affect patterns of nutrient availability and productivity.
Biogeochemical cycles (24 November; Chapter 23, 28: 544-556) What organisms perform nitrogen fixation in terrestrial systems? Aquatic systems?
Define nitrogen fixation, ammonification, nitrification, denitrification, immobilization, and assimilation as these terms apply to the nitrogen cycle. Be able to identify all the steps in the nitrogen cycle.
Biology 203 – Fall 2014 Review for Final Exam – Material since Exam III
6 December 2014 Assimilation= uptake by plants and microbes (soluble N) Immobilization= uptake of soluble N by soil microorganisms (which then are taken by detritus for nitrification (Look at diagram on ppt.) How do bacteria play key roles in the nitrogen cycle—in which steps are they involved? Which steps absolutely require bacteria? Which steps require aerobic conditions? Which steps occur in anaerobic conditions?
How and why do nitrogen pools vary across ecosystems?
How and why does forest clearing impact the nitrogen cycle?

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