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
Freshwater Microbiology
Kaplan, L.A., and A.E. Konopka. 2000. Pages 438–450 in J. Lederberg (editor). Encyclopedia of microbiology. 2nd edition. Academic Press, San Diego, California.
Surface and subsurface dissolved organic carbon
Kaplan, L.A., and J.D. Newbold. 2000. Pages 237–258 in J.B. Jones and P.J. Mulholland (editors). Streams and ground waters. Academic Press, Cambridge, Massachusetts.
The role of microorganisms in the ecological connectivity of running waters
Pusch, M., D. Fiebig, I. Brettar, H. Eisenmann, B.K. Ellis, L.A. Kaplan, M.A. Lock, M.W. Naegeli, and W. Traunspurger. 1998. Freshwater Biology 40(3):453–495.
Isolation and analysis of lignin-derived phenols in aquatic humic substances: improvements on the procedures
Standley, L.J., and L.A. Kaplan. 1998. Organic Geochemistry 28(11):689–697.
Dissolved carbohydrate concentration, composition, and bioavailability to microbial heterotrophs in stream water
Gremm, T.J., and L.A. Kaplan. 1998. CLEAN–Soil, Air, Water 26(3):167–171.
Organic matter dynamics in White Clay Creek, Pennsylvania, USA
Newbold, J.D., T.L. Bott, L.A. Kaplan, B.W. Sweeney, and R.L. Vannote. 1997. Journal of the North American Benthological Society 16:46–50.