Nitrogen Cycle

Card Set Information

Author:
kamrunsreno
ID:
210559
Filename:
Nitrogen Cycle
Updated:
2013-03-31 18:32:15
Tags:
Wetland Ecology
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Description:
Quiz 3
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  1. Organisms Responsible, control by 02 or pH
    Free living Cyanobacteria-many fix N in heterocysts (e.g.) Anabaena, Nostoc)
  2. How wetlands work as wastewater treatment systems
    Sequential nitrification and denitrification--Operates to turn waste ammonia to nitrogen gas. This is the major way in which wetlands are useful in improving water quality. Analogy to processes in our own wastewater treatment plant.
  3. Denitrification
    NO3- -> NO2- -> NO(gas) -> N20(gas) -> N2(gas)

    • Nitrate reductase catalyzes first and second step. 
    • NO3 can serve as an electron acceptor in respiration in place of 02

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