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High Elevation Ecosystem Responses to Atmospheric Deposition of Nitrogen in the Colorado Rocky Mountains, USA

  • Jill S. Baron
  • Koren R. Nydick
  • Heather M. Rueth
  • Brenda Moraska Lafrançois
  • Alexander P. Wolfe
Chapter
Part of the Advances in Global Change Research book series (AGLO, volume 23)

Abstract

The rapid rise in human populations and technological advances since 1850 have caused changes in several global scale biogeochemical cycles, including the global nitrogen cycle. The Haber-Bosch process to convert atmospheric nitrogen gas (N2) to ammonia (NH3) is now almost universally used to fertilize food crops. The production of nitrogen oxides (NOx) from combustion for industrial purposes, energy production, and transportation is the other large source of reactive nitrogen to the atmosphere. Combined, these two human alterations have added approximately 140 Tg N yr1 to the global reactive N pool, a value that now exceeds natural source contributions of about 100 Tg N yr1 (Galloway and Cowling 2002).

Keywords

Acidification Eutrophication Forests Lakes Nitrogen Rocky Mountains 

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Copyright information

© Springer 2005

Authors and Affiliations

  • Jill S. Baron
    • 1
    • 2
  • Koren R. Nydick
    • 1
    • 3
  • Heather M. Rueth
    • 4
  • Brenda Moraska Lafrançois
    • 5
    • 6
  • Alexander P. Wolfe
    • 7
  1. 1.Natural Resource Ecology LaboratoryColorado State UniversityFort CollinsUSA
  2. 2.United States Geological SurveyUSA
  3. 3.Marine Biological LaboratoryEcosystem CenterWoods HoleUSA
  4. 4.Department of Fishery and Wildlife BiologyColorado State UniversityFort CollinsUSA
  5. 5.Dof Earth and Atmospheric SciencesUniversity of AlbertaEdmontonCanada
  6. 6.Aquatic, Watershed and Earth Resources DepartmentUtah State UniversityLoganUSA
  7. 7.St. Croix Watershed Research StationNational Park ServiceMarine on St. CroixUSA

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