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
Characterization of organic matter from natural waters using tetramethylammonium hydroxide thermochemolysis GC-MS
Frazier, S.W., K.O. Nowack, K.M. Goins, F.S. Cannon, L.A. Kaplan, and P.G. Hatcher. 2003. Journal of Analytical and Applied Pyrolysis 70:99–128.
Where rivers are born: the scientific imperative for defending small streams and wetlands
Meyer, J.L., L.A. Kaplan, J.D. Newbold, D.L. Strayer, C.J. Woltemade, J.B. Zedler, R. Beilfuss, Q. Carpenter, R. Semlitsch, M.C. Watzin, and P.H. Zedler. 2003. Published by Sierra Club and American Rivers.
Simultaneous analyses of neutral carbohydrates and amino sugars in freshwaters with HPLC-PAD
Cheng, X., and L. A. Kaplan. 2003. Journal of Chromatographic Science 41:434–438.
Effects of current velocity on the nascent architecture of stream microbial biofilms
Battin, T.J., L.A. Kaplan, J.D. Newbold, X. Cheng, and C. Hansen. 2003c. Applied and Environmental Microbiology 63:5443–5452.
A mixing model analysis of stream solute dynamics and the contribution of a hyporheic zone to ecosystem function
Battin, T.J., L.A. Kaplan, J.D. Newbold, and S.P. Hendricks. 2003a. Freshwater Biology 48:995–1014.
The role of monomers in stream ecosystem metabolism
Kaplan, L.A., and J.D. Newbold. 2002. Pages 97–119 in S. E. G. Findlay and R. L. Sinsabaugh (editors). Aquatic Ecosystems — Interactivity of Dissolved Organic Matter. Academic Press, Cambridge, Massachusetts.
