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
Quantification of PFAS in soils treated with biosolids in ten northeastern US farms
Oviedo-Vargas, D., J. Anton, S. Coleman-Kammula, and X. Qin. 2025. Scientific Reports 15: Article 5582.
Seasonal variation in land cover estimates reveals sensitivities and opportunities for environmental models
Myers, D.T., D. Jones, D. Oviedo-Vargas, J.P. Schmit, D.L. Ficklin, and X. Zhang. 2024. Hydrology and Earth System Sciences 28(23): 5295–5310.
Synergistic water quality and soil organic carbon sequestration benefits of winter cover crops
Zhang X., Y. Wang, S. Lee, K. Liang, K. Zhao, G.W. McCarty, J.G. Alfieri, G.E. Moglen, W.D. Hively, D.T. Myers, D. Oviedo-Vargas, T.V. Nguyen, A.L. Hinson, L. Du, and X.X.
Freshwater salinization: Saltier rivers are a growing concern
Myers, D.T. 2024. National Parks Service, U.S. Department of the Interior.
Agricultural soil microbiomes differentiate in soil profiles with fertility source, tillage, and cover crops
Bier, R.L., M. Daniels, D. Oviedo-Vargas, M. Peipoch, J.R. Price, E. Omondi, A. Smith, and J. Kan. 2024. Agriculture, Ecosystems & Environment 368: 109002.
To achieve the Clean Water Act’s goals, prioritize upstream ecology
Ensign, S.H., D.B. Arscott, M. Daniels, C. Dow, J.K. Jackson, D. Oviedo-Vargas, and M. Peipoch. 2024. Water Resources IMPACT 26(3): 19–21.
