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
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.
Dissolved carbohydrates in streamwater determined by HPLC and pulsed amperometric detection
Gremm, T.J., and L.A. Kaplan. 1997. Limnology and Oceanography 42(2):385–393.
Chemical composition of biodegradable dissolved organic matter in streamwater
Volk, C.J., Volk, C.B., and L.A. Kaplan. 1997. Limnology and Oceanography 42(1):39–44.
Measurement of streamwater biodegradable dissolved organic carbon with a plug-flow bioreactor
Kaplan, L.A., and J.D. Newbold. 1995. Water Research 29(12):2696–2706.
Impact on water quality of high and low density applications of spent mushroom substrate to agricultural lands
Kaplan, L.A., L.J. Standley, and J.D. Newbold. 1995. Compost Science and Utilization 3:55–63.
A field and laboratory procedure to collect, process, and preserve freshwater samples for dissolved organic carbon analysis
Kaplan, L.A. 1994. Limnology and Oceanography 39(6):1470–1476.
