Louis Kaplan, Ph.D.

500 500 Stroud Water Research Center

Research Scientist Emeritus

  • Affiliate Faculty, Delaware Environmental Institute, University of Delaware

970 Spencer Road, Avondale, PA 19311

Interests and Expertise

Dissolved organic matter biogeochemistry, aquatic microbial ecology, and nutrient cycling.

Google Scholar


  • Ph.D., Biology (Limnology), University of Pennsylvania, Philadelphia, Pennsylvania.
  • M.S., Ecology, University of California, Davis, California.
  • B.A., Environmental Sciences, Franklin and Marshall College, Lancaster, Pennsylvania.

Professional Experience

  • Research Scientist Emeritus, Stroud Water Research Center, 2018–present.
  • Director, Ecosystem Science Cluster, Division of Environmental Science, National Science Foundation, 2015–2018.
  • Senior Research Scientist, Stroud Water Research Center, 1999–2017.
  • Curator, Division of Environmental Research, Stroud Water Research Center, Academy of Natural Sciences of Philadelphia, 1996–1999.
  • Assistant Curator, Division of Environmental Research, Stroud Water Research Center, Academy of Natural Sciences of Philadelphia, 1988–1992.
  • Research Associate, Division of Environmental Research, Stroud Water Research Center, Academy of Natural Sciences of Philadelphia, 1980–1988.
  • Post Graduate Research Scientist III, University of California, Davis, California, 1974–1975.


The boundless carbon cycle

Battin, T.J., S. Luyssaert, L.A. Kaplan, A.K. Aufdenkampe, A. Richter, and L.J. Tranvik. 2009. Nature Geoscience 2:598–600.

Temporal dynamics of seston: a recurring nighttime peak and seasonal shifts in composition in a stream ecosystem

Richardson, D.C., L.A. Kaplan, J.D. Newbold, and A.K. Aufdenkampe. 2009. Limnology and Oceanography 54(1):344–354.

Water quality monitoring in the source water areas for New York City: an integrative watershed approach

Arscott, D.B., A.K. Aufdenkampe, T.L. Bott, C.L. Dow, J.K. Jackson, L.A. Kaplan, J.D. Newbold, and B.W. Sweeney. 2008. Final report on monitoring activities, 2000-2005. Stroud Water Research Center, Avondale, Pennsylvania.

Untangling the complex issue of dissolved organic carbon uptake: a stable isotope approach

Kaplan, L.A., T.N. Wiegner, J.D. Newbold, P.H. Ostrom, and H. Gandhi. 2008. Freshwater Biology 53:855–864.

Biome-level biogeography in streambed microbiota

Findlay, R.H., C. Yeates, M.A.J. Hullar, D.A. Stahl, and L.A. Kaplan. 2008. Applied and Environmental Microbiology 74:3014–3021.

See all publications by Stroud Center authors

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