Nitrogen CycleBy Nathan McClurg and Joey

Andrada

Key Terms

• Denitrification– removal of nitrogen or

nitrogen compounds – Conversion of nitrogen

to gaseous form

Precipitation

• Process of rain, sleet, snow, hail, etc.

Ammonium

• Form of nitrogen contained in fertilizer

• generated in soil by breakdown of organic matter

• NH4

Mineralization• Organic compounds to

inorganic compounds•(Organic) Dead plant,

animal material

•(Inorganic) nitrates, carbon dioxide

Nitrates

• Found in plant nutrient and fertilizer

• Animal feed, manures, and sewage

Nitrites• NO2• Converted from free

ammonia

• Harmful at any level• Converts into nitrates

Amount of Nitrogen

• 78.08% in atmosphere

• 79% bound nitrogen in lithosphere

• Mass of nitrogen 20,000,000,000,000 tons in hydrosphere

• 80% in biosphere

Ecological Impact

• About 90% of the soil

• Denitrification decreases fertility of plants

• High concentrates of nitrates are toxic

• Without Denitrification life would not be possible except near large bodies of water

Biological Impact• Health effects of

nitrogen

• Environmental effects of nitrogen

Bibliography

• http://www.aquariacentral.com/articles/glossary.shtml• http://pnwmg.org/mgglossarya.html• www.hubbardbrook.org/6-12_education/Glossary/

Glossary.htm• www.laurentianvalleytwsp.on.ca/

DomesticWaterWellDefine.html• www.aquariacentral.com/articles/glossary.shtml• www.biologie.uni-hamburg.de/b-online/e54/54d.htm• http://www.lenntech.com/elements-and-water/nitrogen-

and-water.htm

Hyperlinks to Images• http://www.gettyimages.com/Creative/Frontdoor/NationalGeographicRM?esource=googUSA_Ima

ges_Categories&country=USA&kw=usa+nature_picture

• http://images.google.com/imgres?imgurl=http://www.windows.ucar.edu/earth/climate/images/nitrogencycle.jpg&imgrefurl=http://www.ucar.edu/news/backgrounders/nitrogen.shtml&h=718&w=720&sz=186&hl=en&start=7&um=1&usg=__aDebNgM_WXcI0zJSF0Z7mXAz-iw=&tbnid=SoJ4GhLez3nuPM:&tbnh=140&tbnw=140&prev=/images%3Fq%3DNitrogen%2BCycle%26um%3D1%26hl%3Den%26rls%3Dcom.microsoft:en-US%26sa%3DG

• http://filebox.vt.edu/users/chagedor/biol_4684/Cycles/Denit.html

• http://science.howstuffworks.com/acid-rain.htm

• http://jedidiah.stuff.gen.nz/wp/?p=15

• http://www.esc.ethz.ch/research/efficientconversion/cotwo/co2projects

• http://www.advancedaquarist.com/2007/8/tips

• http://eliastobias.net/?cat=1

• http://www.desktopscenes.com/Autumn%20Scenes%20from%20Southern%20Vermont%20(2003)/slides/Rocky%20Forest%20Path.html

• http://www.citivestmortgage.com/linkstoResources.html