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Transcript of Nitrogen Cycle
2 NO2- + O2 -> 2 NO3- 2NO3- + 2CH2O + 2H+ -> N2O + CO2 + 3H2O Ammonification Nitrification Leaching 2NO3- + 12 H+ → N2 + 6 H2O Bibliography NH3 + H -> NH4+ NH4+ -> NH3 + H N is absorbed as a nutrient and stored in plants.
N is passed to consumers which eat plants and
eat each other.
Dead animals and their poop return N to the soil. The Nitrogen Cycle By Jonathan H, Lilli K, Laura M, Daniel P, Indy S, Libby S, and Cyrus W One thing to note... The cycle works underwater as it does in the soil. Aquatic microbes fix atmospheric N and nitrify ammonium to nitrate, the products of which are absorbed by plants then animals. Some nitrate is denitrified into the atmosphere. http://en.wikipedia.org/ http://nmsp.cals.cornell.edu/publications/factsheets/factsheet2.pdf http://www.mhhe.com/biosci/genbio/tlw3/eBridge/Chp29/animations/ch29/1_nitrogen_cycle.swf http://bcs.whfreeman.com/thelifewire/content/chp58/5802004.html Miller, G T. "Ecosystems: What Are They and How do They Work?" Living in the Environment. 14th. Thomson Learning, Inc., 2005. 80-81. Print. How Humans Wreck the Cycle Combustion of fuel releases NO to the atmosphere which falls back to
Earth as acid rain (HNO3). Fertilizers and livestock release excess N2O, a greenhouse gas. Organic nitrogen and nitrogen in soil is released to the atmosphere by deforestation. Aquatic ecosystems are upset by nitrate runoff from agriculture which causes eutrophication. Planting and harvesting crops exhausts the soil of nitrogen. Nitrate-> Nitrogen gas + nitrous oxide Ammonia -> Ammonium Ammonium and/or Nitrate -> Organic N Ammonium -> ammonia