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Watershed Biogeochemistry Group

960 720 Stroud Water Research Center

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

Headshot of Michael Gentile.

Michael Gentile

Staff Scientist
Diana Oviedo-Vargas, Ph.D.

Diana Oviedo Vargas, Ph.D.

Associate Research Scientist

Watershed Biogeochemistry News

Publication title with image of a mayfly
Hydroclimate and landscape diversity drive highly variable greenhouse gas emissions from tropical and subtropical inland waters
Duvert, C., Borges, A.V., Calamita, E., et al. 2025. Nature Water, early online access.
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Reduction in nitrification during the early transition from conventional to organic farming practices
Price, J.R., D. Oviedo-Vargas, M. Peipoch, M.D. Daniels, and J. Kan. 2025. Ecosphere 16(8): e70375.
Clean water running off a farm field.
These Contaminants Are Reaching Our Surface Water
“Forever chemicals” in sewage sludge are reaching waterways, Stroud Center finds and New York Times reports.
Mandy Cabot and Peter Kjellerup with two Silk Grass Farms staff members.
Silk Grass Farms is a Force for Good
To understand the state of its water resources and how to protect them, Silk Grass Farms asked the Stroud Center to provide expert guidance.
Publication title with image of a mayfly
Seasonal and longitudinal dynamics of DOM within headwater streams of a tropical evergreen forest
Sullivan, S.N., J.C. Bowen, L.A. Kaplan, R.M. Cory, and P.G. Hatcher. 2025. Water Research 281: 123668.
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High fecal indicator bacteria in temperate headwater streams at baseflow: implications for management and public health
D.T. Myers, L. Zgleszewski, R. Bier, J.R. Price, S. Morgan, J.K. Jackson, D. Oviedo-Vargas, M. Daniels, D.B. Arscott, J. Kan. 2025. Water Research X 29: 100347.