The Fernow Watershed Acidification Study: Ecosystem Acidification, Nitrogen Saturation and Base Cation Leaching

  • Mary Beth Adams
  • James N. Kochenderfer
  • Pamela J. Edwards

In 1989, a watershed acidification experiment was begun on the Fernow Experimental Forest in West Virginia, USA. Ammonium sulfate fertilizer (35.5 kg N ha−1 yr−1and 40.5 kg S ha−1 yr−1) was applied to a forested watershed (WS3) that supported a 20-year-old stand of eastern deciduous hardwoods. Additions of N and S are approximately twice the ambient deposition of nitrogen and sulfur in the adjacent mature forested watershed (WS4), that serves as the reference watershed for this study. Acidification of stream water and soil solution was documented, although the response was delayed, and acidification processes appeared to be driven by nitrate rather than sulfate. As a result of the acidification treatment, nitrate solution concentrations increased below all soil layers, whereas sulfate was retained by all soil layers after only a few years of the fertilization treatments, perhaps due to adsorption induced from decreasing sulfate deposition. Based on soil solution monitoring, depletion of calcium and magnesium was observed, first from the upper soil horizons and later from the lower soil horizons. Increased base cation concentrations in stream water also were documented and linked closely with high solution levels of nitrate. Significant changes in soil chemical properties were not detected after 12 years of treatment, however.


acidic deposition base cation leaching forest soils nitrogen saturation soil solution chemistry 


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  1. Aber, J., McDowell, W., Nadelhoffer, K., Magill, A., Berntson, G., Kamakea, M., et al. (1998). Nitrogen saturation in temperate forest ecosystems: Hypotheses revisited. Bioscience, 48, 921–934.CrossRefGoogle Scholar
  2. Adams, M. B. (1999). Acidic deposition and sustainable forest management in the central Appalachians, USA. Forest Ecology and Management, 122, 17–28.CrossRefGoogle Scholar
  3. Adams, M. B., Burger, J. A., Jenkins, A. B., & Zelazny, L. (2000). Impact of harvesting and atmospheric pollution on nutrient depletion of eastern US hardwood forests. Forest Ecology and Management, 138, 301–319.CrossRefGoogle Scholar
  4. Adams, M. B., DeWalle, D. R., & Hom, J. (Eds.) (2006). The Fernow watershed acidification study (p.290). Berlin Heidelberg New York: Springer.Google Scholar
  5. Adams, M. B., Kochenderfer, J. N., Wood, F., Angradi, T. R., & Edwards, P. J. (1994). Forty years of hydrometeorological data on the Fernow Experimental Forest, West Virginia. USDA Forest Service General Technical Report NE-184. Radnor, PA. 24 p.Google Scholar
  6. Core, E. L. (1966). Vegetation of West Virginia (p.217). Parsons, WV: McClain.Google Scholar
  7. DeWalle, D. R., Kochenderfer, J. N., Adams, M. B., Miller, G. W., Gilliam, F. S., Wood, F., et al. (2006). Vegetation and acidification. In M. B. Adams, D. R. DeWalle, & J. Hom (Eds.), The Fernow watershed acidification study (pp. 137–188). Berlin Heidelberg New York: Springer.CrossRefGoogle Scholar
  8. Edwards, P. J., Williard, K. W. J., Wood, F., & Sharpe, W. E. (2006). Soil water and stream water chemical responses. In M. B. Adams, D. R. DeWalle, & J. Hom (Eds.), The Fernow watershed acidification study (pp. 71–136). Berlin Heidelberg New York: Springer.CrossRefGoogle Scholar
  9. Edwards, P. J., & Wood, F. (1993). Fernow experimental forest watershed acidification project: Field and laboratory quality assurance/quality control protocols. USDA Forest Service General Technical Report NE-177. Radnor, PA 15 p.Google Scholar
  10. Fenn, M. E., Poth, M. A., Aber, J. D., Baron, J. S., Bormann, B. T., Johnson, D. W., et al. (1998). Nitrogen excess in North American ecosystems: Predisposing factors, ecosystem responses, and management strategies. Ecological Applications, 8, 706–733.CrossRefGoogle Scholar
  11. Fernandez, I. J., Rustad, L. E., Norton, S. A., Kahl, J. S., & Cosby, B. J. (2003). Experimental acidification causes soil base-cation depletion at the Bear Brook Watershed in Maine. Soil Science Society of America Journal, 67, 1909-1919.CrossRefGoogle Scholar
  12. Galloway, J. N., Norton, S. A., & Church, M. R. (1983). Freshwater acidification from atmospheric deposition of sulfuric acid: A conceptual model. Environmental Science & Technology, 17, 541A-545A.CrossRefGoogle Scholar
  13. Gilliam, F. S., Yurish, B. M., & Adams, M. B. (2001). Temporal and spatial variation of nitrogen transformations in nitrogen saturated soils of a central Appalachian hardwood forest. Canadian Journal of Forest Research, 31,1768–1785.CrossRefGoogle Scholar
  14. Helvey, J. D., & Kunkle, S. H. (1986). Input-output budgets of selected nutrients on an experimental watershed near Parsons, West Virginia. USDA Forest Service General Technical Report NE-584. Broomall, PA. 7 p.Google Scholar
  15. Lynch, J. A., Bowersox, V. C., & Grimm, J. W. (2000). Changes in sulfate deposition in eastern USA following implementation of phase I of Title IV of the Clean Air Act Amendments of 1990. Atmospheric Environment, 34(11), 1665–1680.CrossRefGoogle Scholar
  16. Madarish, D. M., Rodrigue, J. L., & Adams, M. B. (2002). Vascular flora and macroscopic fauna on the Fernow Experimental Forest, USDA Forest Service. General Technical Report NE-291. Newtown Square, PA. 37 p.Google Scholar
  17. May, J. D., Burdette, S. B., Gilliam, F. S., & Adams, M. B. (2005). Interspecific divergence in foliar nutrient dynamics and stem growth in response to excessive nitrogen deposition in a temperate forest. Forest Ecology and Management, 35, 1023–1030.Google Scholar
  18. Norton, S. A., & Fernandez, I. J. (Eds.) (1999). The Bear Brook Watershed in Maine: A paired watershed experiment - The first decade (1987–1997).Google Scholar
  19. Boston, MA: Kluwer. Norton, S. A., Fernandez, I. J., Kahl, J. S., & Reinhardt, R. L. (2003). Acidification trends and the evolution of neutralization mechanisms through time at the Bear Brook Watershed in Maine (BBWM). Water, Air, & Soil Pollution. Focus, 4, 289–310.Google Scholar
  20. Pan, C., Tajchman, S. J., & Kochenderfer, J. N. (1997). Dendroclimatological analysis of major forest species of the central Appalachians. Forest Ecology and Management, 98, 77–87.CrossRefGoogle Scholar
  21. Patric, J. H., & Goswami, N. (1968). Evaporation pan studies -Forest research at Parsons. West Virginia Agriculture and Forestry, 1(4), 6–10.Google Scholar
  22. Peterjohn, W. T., Adams, M. B., & Gilliam, F. S. (1996). Symptoms of nitrogen saturation in two central Appala-chian hardwood forest ecosystems. Biogeochemistry, 35, 507–522.CrossRefGoogle Scholar
  23. Reuss, J. O., & Johnson, D. W. (1986). Acid deposition and the acidification of soils and waters (p. 119). Berlin Heidelberg New York: Springer.Google Scholar
  24. Stoddard, J. L. (1994). Long-term changes in watershed retention of nitrogen: Its causes and aquatic consequences. In L. A. Baker (Ed.), Environmental chemistry of lakes and reservoirs. Advances in chemistry series, vol. 237 (pp. 223–284). Washington, DC: American Chemical Society.CrossRefGoogle Scholar
  25. Venterea, R. T., Groffman, P. M., Castro, M. S., Verchot, L. V., Fernandez, I. J., & Adams, M. B. (2004). Soil emission of nitric oxide in two forest watershed subjected to elevated N inputs. Forest Ecology and Management, 196, 335–349.CrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media B.V 2007

Authors and Affiliations

  • Mary Beth Adams
    • 1
  • James N. Kochenderfer
    • 1
  • Pamela J. Edwards
    • 1
  1. 1.USDA Forest ServiceParsonsUSA

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