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Paul H. O’Neill
School of Public and Environmental Affairs

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  • Todd Royer

Todd V. Royer

Professor; Faculty Chair for Environmental Science; Director, Royer Laboratory

Photo of Todd V. Royer
Phone:
(812) 855-0971
Email:
troyer@indiana.edu
Research areas:
Biogeochemistry and Environmental Microbiology
Ecology and Conservation
Hydrology and Water Resources
Areas of Interest:
Aquatic biogeochemistry
Water resources
Nutrient and carbon cycling in streams and rivers
Water quality and nutrient standards

Curriculum Vitae

MSBII 426

Education

  • Ph.D., Biology, Idaho State University, 1999
  • M.S., Biology, Idaho State University, 1995
  • B.S., Animal Ecology, Iowa State University, 1992

Courses

  • Limnology
  • Stream Ecology
  • Sustainable River Management

Biography

Print-quality photo

Dr. Todd V. Royer is an aquatic ecologist specializing in water resources, nutrient and carbon cycling, water quality, and nutrient standards. He joined O'Neill in 2005 and also serves as an adjunct professor with Indiana University's Biology Department.

Royer's research investigates the ecological and biogeochemical processes that affect water quality in streams and rivers. Much of his work is conducted in agricultural landscapes where non-point sources of nutrients and other pollutants are a threat to water quality and ecological health. In his research, Royer and his students study aquatic biogeochemistry with particular focus on nitrogen, phosphorus, organic carbon, and land use activities that impact water quality. They use a combination of field studies and laboratory experiments to examine patterns and mechanisms across the land-water interface. Most of their projects are interdisciplinary, often involving collaboration with researchers in other fields of study, including hydrology, microbiology, and aquatic entomology.

Royer is a member of the Science Assessment Team for the Indiana Nutrient Reduction Strategy, chaired the Nutrient Science Advisory Committee for the state of Illinois, and is a member of the Aquatic Technical Working Group for the National Ecological Observatory Netowrk. He is a long-time member of the Association for the Sciences of Limnology and Oceanography (ASLO) and the Society for Freshwater Science (SFS), where he served as vice president from 2018-19.



Highlights

  • Faculty Chair for Environmental Science
  • Science Assessment Team, Indiana Nutrient Reduction Strategy
  • Advisor, National Ecological Observatory Network
  • Vice President, Society for Freshwater Science (2018-19)

In the News

  • "Five finalists selected for IU Grand Challenges research program" - IDS,  January 8, 2016
  • "Farmers say EPA rule will be a costly hindrance" - Bloomberg Businessweek, July 12, 2015
  • "Farmers: EPA rule will be costly" - The Reporter-Times, July 12, 2015
  • "Does Road Salt Hurt the Environment?" - WISH TV, February 5, 2014
  • "Anti-anxiety Drug Found in Rivers Makes Fish More Aggressive," - Nature, the International Weekly Journal of Science, Feb. 14, 2013

Selected Works

  • “Time to amend the US Clean Water Act,”Science, 372 (6548) 1272 (2021)
  • “The case for studying highly modified agricultural streams: farming for biogeochemical insights,” (with J.L. Tank, S.L. Speir, and L.R. Sethna), Limnology and Oceanography Bulletin, May: 41-47 (2021)
  • “Stoichiometry of nitrogen, phosphorus, and silica loads in the Mississippi-Atchafalaya River basin reveals spatial and temporal patterns in risk for cyanobacterial blooms,”Limnology and Oceanography, 65: 325-335 (2020)
  • “Human-dominated rivers and river management in the Anthropocene,” Stream Ecosystems in a Changing Environment (ed. J. Jones and E. Stanley), Academic Press, (2016)
  • Persistent, Bioaccumulative, and Toxic (PBT) Chemicals: Technical Aspects, Policies, and Practices, (with A.D.K. Abelkop and J.D. Graham) CRC Press, Boca Raton, Florida (2015)
  • "Dissolved organic carbon manipulation reveals coupled cycling of carbon, nitrogen and phosphorus in a nitrogen-rich stream," (with L.T. Johnson and D. Oviedo-Vargas), Limnology and Oceanography, 58(4): 1196-1206 (2013)
  • "Manipulation of the dissolved organic carbon pool in an agricultural stream: responses in microbial community structure, denitrification, and assimilatory nitrogen uptake," (with J.M. Edgerton, L.T. Johnson, and L.G. Leff), Ecosystems, 15: 1027-1038 (2012)
  • "Pharmaceutical compounds and ecosystem function: an emerging research challenge for aquatic ecologists," (with E. J. Rosi-Marshall), Ecosystems, 15: 867-880 (2012)
  • "Timing of riverine export of nitrate and phosphorus from agricultural watersheds in Illinois: implications for reducing nutrient loading to the Mississippi River," (with M. B. David and L. E. Gentry), Environmental Science & Technology, 40: 4126–4131 (2006)

View all publications

Related Links

  • The Royer Laboratory
  • Google Scholar Profile
  • ORCID

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