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J. Denis Newbold, Ph.D.

624 624 Stroud Water Research Center
Denis Newbold, Ph.D.

Research Scientist Emeritus

Ecosystem Processes Group

Contact

newbold@stroudcenter.org
tel. 610-268-2153, ext. 1227
970 Spencer Road, Avondale, PA 19311

Education

  • Ph.D., Aquatic Ecology, University of California, Berkeley, California.
  • M.S., Hydrology, Cornell University, Ithaca, New York.
  • B.S., Engineering, Swarthmore College, Swarthmore, Pennsylvania.

Interests and Expertise

The flow of nutrients (primarily nitrogen, phosphorus, and carbon) to streams and rivers and how those nutrients are processed, transformed, and transported by the stream and river ecosystem.

Professional Experience

  • Research Scientist Emeritus, Stroud Water Research Center, 2011–present.
  • Research Scientist, Stroud Water Research Center, 1993–2011.
  • Assistant Curator, Stroud Water Research Center of the Academy of Natural Sciences of Philadelphia, 1985–1992.
  • Ruth Patrick Scholar, Stroud Water Research Center, Division of Environmental Research, Academy of Natural Sciences of Philadelphia. 1983–1985.
  • Research Staff Member, Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 1982–1983.
  • Research Associate, Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 1977–1982.
  • Eugene P. Wigner Postdoctoral Fellow, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 1977–1979.

Publications

Phosphorus spiralling in a woodland stream: seasonal variations

Mulholland, P.J., J.D. Newbold, J.W. Elwood, L.A. Ferren, and J.R. Webster. 1985. Ecology 66:1012–1023.

Effect of a leaf shredding invertebrate on organic matter dynamics and phosphorus spiralling in heterotrophic laboratory streams

Mulholland, P.J., J.W. Elwood, J.D. Newbold, and L.A. Ferren. 1985. Oecologia 66(2):199–206.

Phosphorus dynamics in a woodland stream ecosystem: a study of nutrient spiralling

Newbold, J.D., J.W. Elwood, R.V. O’Neill, and A.L. Sheldon. 1983. Ecology 64:1249–1265.

Resource spiralling: an operational paradigm for analyzing lotic ecosystems

Elwood, J.W., J.D. Newbold, R.V. O’Neill, and W. Van Winkle. 1983. Pages 3–27 in T.D. Fontaine III, and S.M. Bartell (editors). Dynamics of lotic ecosystems. Ann Arbor Science, Ann Arbor, Michigan.

The effect of grazing intensity on phosphorus spiralling in autotrophic streams

Mulholland, P.J., J.D. Newbold, J.W. Elwood, and C.L. Hom. 1983. Oecologia 58:358–366.

See all publications by Stroud Center authors

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