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
Selection of surrogates for a genetically engineered microorganism with cellulolytic capability for ecological studies in streams
Bott, T.L., and L.A. Kaplan. 1991. Canadian Journal of Microbiology 37:848–857.
Potential for protozoan grazing of bacteria in streambed sediments
Bott, T.L., and L.A. Kaplan. 1990. Journal of the North American Benthological Society 9:336–345.
Cellulolytic bacteria as surrogates for genetically engineered microorganisms: microcosm studies of persistence and effects in streambed sediments
Bott, T.L., and L.A. Kaplan. 1990. Pages 139–143 in ORD Biotechnology Risk Assessment Program (editor). Review of Progress in the Biotechnology-Microbial Pest Control Agent Risk Assessment Program, Report No. EPA/600/9-90/029.
Nutrients for bacterial growth in drinking water: bioassay evaluation
Kaplan, L.A., and T.L. Bott. 1990. EPA Report No. EPA/600/S2-89/030. U.S. Environmental Protection Agency, Cincinnati, Ohio.
Modifications to simplify an AOC bioassay for routine use by utilities monitoring bacterial regrowth potential in water distribution systems
Kaplan, L.A., and T.L. Bott. 1990. Pages 1031–1042 in Proceedings Water Quality Technology Conference, Philadelphia, Pennsylvania.
Diel fluctuations in bacterial activity on streambed substrata during vernal algal blooms: effects of temperature, water chemistry, and habitat
Kaplan, L.A., and T.L. Bott. 1989. Limnology and Oceanography 34:718–733.
