The main focus of the Watershed Biogeochemistry Group is to investigate major elemental cycles in streams and their watersheds, particularly carbon, nitrogen, and phosphorus pools and fluxes. We are especially interested in quantifying and characterizing the rich array of organic molecules that exist in stream ecosystems, and serve as the main food source to microorganisms and consequently to all biological communities. Throughout the watershed, water is found in many places beyond stream channels, including aquifers, soils, and sediments. Our biogeochemistry laboratory has the capabilities to perform a wide range of chemistry analyses in water samples from all these places.
Watershed Biogeochemistry Staff
Watershed Biogeochemistry News
UpStream Newsletter, Spring 2002
Stroud scientists are studying how organic molecules support stream microorganisms and how far the molecules travel downstream before they are metabolized.
Autecological properties of 3-chlorobenzoate-degrading bacteria and their population dynamics when introduced into sediments
Bott, T.L., and L.A. Kaplan. 2002. Microbial Ecology 43:199–216.
Monitoring dissolved organic carbon in surface and drinking waters
Volk, C., L. Wood, B. Johnson, J. Robinson, H.W. Zhu, L. Kaplan. 2002. Journal of Environmental Monitoring 4(1):43–47.
Assessment of relative accuracy in the determination of organic matter concentrations in aquatic systems
Aiken, G., L.A. Kaplan, and J. Weishaar. 2002. Journal of Environmental Monitoring. 4:70–74.
Improved analysis of dissolved carbohydrates in stream water
Cheng, X., and L. A. Kaplan. 2001. Analytical Chemistry 73:458–461.
Molecular tracers of organic matter sources to surface water resources
Standley, L.J., L.A. Kaplan, and D. Smith. 2000. Environmental Science and Technology 34:3124–3130.
