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79
Schofield, C.L. and J.R. Trojnar. 1980. Aluminum toxicity to brook trout (Salvelinus
fontinalis) in acidified waters. In T.Y. Toribara, M.W. Miller, and P.E. Morrows (Eds.),
Polluted Rain. Plenum Press, New York, pp. 341–362.
Seip, H.M. 1980. Acidification of freshwater—sources and mechanisms. Ecological
impact of acid precipitation. In Proceedings of an International Conference, SNSF
Project, Sandefjord, Norway. Oslo, Norway, pp. 358–365.
Sickman, J.O., A. Leydecker, C.C.Y. Change, C. Kendall, J.M. Melack, D.M. Lucero, and
J. Schimel. 2003a. Mechanisms underlying export of N from high-elevation catchments during seasonal transitions. Biogeochemistry 64:1–24.
Sickman, J.O., J.M. Melack, and D.W. Clow. 2003b. Evidence for nutrient enrichment of highelevation lakes in the Sierra Nevada, California. Limnol. Oceanogr. 48(5):1885–1892.
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. American Chemical Society, Washington, DC, pp. 223–284.
Sullivan, T.J., J.R. Webb, K.U. Snyder, A.T. Herlihy, and B.J. Cosby. 2007. Spatial distribution
of acid-sensitive and acid-impacted streams in relation to watershed features in
the southern Appalachian mountains. Water Air Soil Pollut. 182:57–71.
Turk, J.T. 2001. Field Guide for Surface Water Sample and Data Collection. Air Program,
USDA Forest Service, Washington, DC.
Ulrich, B., R. Mayer, and T.K. Khanna. 1980. Chemical changes due to acid precipitation in
a loess-derived soil in central Europe. Soil Sci. 130:193–199.
US Geological Survey. 2006, September. Collection of water samples (ver. 2.0). In US
Geological Survey Techniques of Water-Resources Investigations, Book 9, Chapter A4.
http://pubs.water.usgs.gov/twri9A4/, accessed March 10, 2014.
Valiela, I., K. Foreman, M. LaMontagne, D. Hersh, J. Costa, P. Peckol, B. DeMeo-Andreson,
C. D’ Avanzo, M. Babione, C. Sham, J. Brawley, and K. Lajtha. 1992. Couplings of
watersheds and coastal waters: sources and consequences of nutrient enrichment
in Waquoit Bay, Massachusetts. Estuaries 15:443–457.
Williams, M.W., J.S. Baron, N. Caine, R. Sommerfeld, and J.R. Sanford. 1996. Nitrogen saturation in the Rocky Mountains. Environ. Sci. Technol. 30:640–646.
Zabik, J.M. and J.N. Seiber. 1993. Atmospheric transport of organophosphate pesticides
from California’s Central Valley to the Sierra Nevada Mountains. J. Environ. Qual.
22:80–90.