Chapter

Influences on Ecosystem Function IV: Nitrogen Biogeochemistry

Frederic H. Wagner

in Yellowstone's Destabilized Ecosystem

Published in print June 2006 | ISBN: 9780195148213
Published online September 2007 | e-ISBN: 9780199790449 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195148213.003.0014
 Influences on Ecosystem Function IV: Nitrogen Biogeochemistry

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Ungulate grazing, primarily by elk and bison, accelerates nitrogen cycling within the northern-range system by consumption, digestion, excretion, and subsequent mineralization. Ungulate use does not in and of itself increase or decrease the total nitrogen content of the system. The content is determined by input-output processes that include fixation, denitrification, volatilization, soil erosion, aerosol transport, and seasonal elk movements. Without measurements of the input-output processes, no nitrogen budget for the system can be formulated.

Keywords: nitrogen cycling; mineralization; input-output processes; denitrification; fixation; volatilization; erosion

Chapter.  2823 words.  Illustrated.

Subjects: Animal Pathology and Diseases

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