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    Author(s): L.H. Pardo; L.H. Geiser; M.E. Fenn; C.T. Driscoll; C.L. Goodale; E.B. Allen; J.S. Baron; R. Bobbink; W.D. Bowman; C.M. Clark; B. Emmett; F.S. Gilliam; T. Greaver; S.J. Hall; E.A. Lilleskov; L. Liu; J.A. Lynch; K. Nadelhoffer; S.S. Perakis; M.J. Robin-Abbott; J.L. Stoddard; K.C. Weathers
    Date: 2011
    Source: In: Pardo, L.H.; Robin-Abbott, M.J.; Driscoll, C.T., eds. Assessment of Nitrogen deposition effects and empirical critical loads of Nitrogen for ecoregions of the United States. Gen. Tech. Rep. NRS-80. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 229-284.
    Publication Series: General Technical Report (GTR)
    Station: Northern Research Station
    PDF: View PDF  (10.71 MB)

    Description

    Human activity in the last century has led to a substantial increase in nitrogen (N) emissions and deposition (Galloway et al. 2003). Because of past, and, in some regions, continuing increases in emissions (Lehmann et al. 2005, Nilles and Conley 2001), this N deposition has reached a level that has caused or is likely to cause alterations and damage in many ecosystems across the United States. In some ecoregions, the impact of N deposition has been severe and has changed the biotic community structure and composition of ecosystems.

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    Citation

    Pardo, L.H.; Geiser, L.H.; Fenn, M.E.; Driscoll, C.T.; Goodale, C.L.; Allen, E.B.; Baron, J.S.; Bobbink, R.; Bowman, W.D.; Clark, C.M.; Emmett, B.; Gilliam, F.S.; Greaver, T.; Hall, S.J.; Lilleskov, E.A.; Liu, L.; Lynch, J.A.; Nadelhoffer, K.; Perakis, S.S.; Robin-Abbott, M.J.; Stoddard, J.L.; Weathers, K.C. 2011. Synthesis, Chapter 19. In: Pardo, L.H.; Robin-Abbott, M.J.; Driscoll, C.T., eds. Assessment of Nitrogen deposition effects and empirical critical loads of Nitrogen for ecoregions of the United States. Gen. Tech. Rep. NRS-80. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 229-284.

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