< <

Environmental Science Faculty

Todd V. Royer
Assistant Professor

Ph.D., Idaho State University, 1999

Todd Royer is an aquatic ecologist with broad interests in water resources and watershed processes. His research focuses on biogeochemistry and water quality in streams and rivers, particularly in the agricultural landscape of the Midwestern U.S. Nutrient enrichment, degradation of water quality, and the impact of biotechnological advances on water resources are critical environmental problems. Dr. Royer’s research addresses various aspects of these problems using both field and laboratory approaches.

Ongoing projects include an investigation of carbon cycling in small agricultural streams (funded by the National Science Foundation), development of science-based nutrient standards for streams and rivers of Illinois, and a study of pharmaceutical compounds and other organic wastewater contaminants in a rapidly urbanizing watershed. Much of Professor Royer’s research is interdisciplinary and he frequently collaborates with hydrologists, microbial ecologists, aquatic entomologists, as well as other biogeochemists.

Click here for more information on Professor Royer’s research and a complete list of publications. http://www.indiana.edu/~royerlab/home.htm.

Selected Recent Publications

Rosi-Marshall, E.J., J.L. Tank, T.V. Royer, M.R. Whiles, M. Evans-White, C. Chambers, N.A. Griffiths, J. Pokelsek, and M.L. Stephen. 2007. Toxins in transgenic crop byproducts may affect headwater streams. Proceedings of the National Academy of Sciences, in press.

Heatherly, T., M.R. Whiles, T.V. Royer, and M.B. David. 2007. Relationships between habitat quality, water quality, and macroinvertebrate assemblages in Illinois streams. Journal of Environmental Quality, in press.

Arango, C.P., J.L. Tank, J.L. Schaller, T.V. Royer, M.J. Bernot, and M.B. David. 2007. Benthic organic carbon influences denitrification in streams with high nitrate concentration. Freshwater Biology 52:1210–1222.

Das, M., T.V. Royer, and L.G. Leff. 2007. Diversity of fungi, bacteria, and actinomycetes on leaves decomposing in a stream. Applied and Environmental Microbiology 73:756–767.

Gentry, L.E., M.B. David, T.V. Royer, C.A. Mitchell, and K.M. Starks. 2007. Phosphorus transport pathways to streams in tile-drained agricultural watersheds. Journal of Environmental Quality 36:408–415.

David, M.B., L.G. Wall, T.V. Royer, and J.L. Tank. 2006. Denitrification and the nitrogen budget of a reservoir in an agricultural landscape. Ecological Applications 16:2177–2190.

Royer, T.V., M.B. David, and L.E. Gentry. 2006. Timing of riverine export of nitrate and phosphorus from agricultural watersheds in Illinois: implications for reducing nutrient loading to the Mississippi River. Environmental Science & Technology 40:4126–4131.

Royer, T.V. and M.B. David. 2005. Export of dissolved organic carbon from agricultural streams in Illinois, USA. Aquatic Sciences 67:465–471.

Royer, T.V., J.L. Tank, and M.B. David. 2004. Transport and fate of nitrate in headwater agricultural streams in Illinois. Journal of Environmental Quality 33:1296–1304.