Cooperative Fish and Wildlife Research Units Program: Utah
Education, Research and Technical Assistance for Managing Our Natural Resources

Utah Project


Assessing the impact of nutrient enrichment in the Henry’s Fork Headwaters

May 2018 - May 2023


Personnel

Participating Agencies

  • Henry's Fork Foundation
Oblique overhead shot of two scientists standing in a clear stream next to a wooden dock processing water samples. <br>Jack McLaren (right), PhD. candidate at Utah State University. <br>Bella Fucigna (left), undergraduate at Washington & Lee University, Virginia, serving as intern at the Henry's Fork Foundation.

The section of the Henry’s Fork of the Snake River upstream of Island Park Reservoir (“Upper Henry’s Fork”) is a popular recreational angling destination and potential cold water refuge in the face of changing climate conditions that has seen a decline fishery quality since the 1980s. To restore and enhance this historically important state fishery, I am working with the non-profit Henrys Fork Foundation and its many NGO, private, and government partners at the local, state, and federal level to conduct good science that will inform future management. On the way, we look to test key underlying theories of stream ecology in the hopes of informing effective stream ecology research and management locally and across the West.

Technical Publications Publication Date
McLaren, J., Brothers, S., Budy, P., Van Kirk, R. 2020. Improving Fish Habitat in the Henry’s Fork of the Snake in Idaho: A Growing Problem. WDAFS Tributary 44(4). https://wdafs.org/newsletter/past-editions/">https://wdafs.org/newsletter/past-editions December 2020
McLaren, J., Budy, P., Van Kirk, R., Mabaka, A.J. 2021. Drought and drawdown create a house of horrors: shrinking habitat potentially impacts fish populations in a river-reservoir system in Idaho. NALMS LakeLine Magazine 41(3). https://www.nalms.org/lakeline-magazine/ October 2021
McLaren, J. 2022. The Upper Henry’s Fork Project: uncovering the diamond in plain sight. Henry's Fork Foundation Blog. https://www.henrysfork.org/post/the-upper-henry-s-fork-project-uncovering-the-diamond-in-plain-sight" February 2022
McLaren, J. 2022. The Upper Henry’s Fork Project: bottlenecks limiting fish populations. Henry's Fork Foundation Blog. https://www.henrysfork.org/post/the-upper-henry-s-fork-project-bottlenecks-limiting-fish-populations March 2022
Presentations Presentation Date
McLaren, J.S.; S. Brothers; and P. Budy. 2019. Reservoirs as magnifiers of climate change: effect of climate-driven water management on Kokanee salmon (Oncorhynchus nerka) habitat and migrations in Idaho’s Island Park Reservoir. Spring Runoff Conference, Logan, Utah, March 26. Poster presentation. March 2019
McLaren, J. P. Budy, S. Brothers, and R. Van Kirk. Macrophytes and nutrients in a stream system: Utilizing and evaluating the Qual2K model in the Henry’s Fork of the Snake River. Society for Freshwater Science, Salt Lake City, Utah, May. Oral Presentation. May 2019
McLaren, J. P. Budy, S. Brothers, and R. Van Kirk. Physical structure or nutrient enrichment? Novel insights on food web controls from a macrophyte-dominated river system. Spring Runoff Conference, March 2020, Logan, UT.

March 2020
McLaren, J. P. Budy, S. Brothers, and R. Van Kirk. Physical structure or nutrient enrichment? Novel insights on food web controls from a macrophyte-dominated river system. Ecological Society of America, August 2020, Salt Lake City, UT. August 2020
McLaren, J. P. Budy, S. Brothers, and R. Van Kirk. Fish like plants (but maybe not) and other stories from the Henry's Fork. Henry's Fork Watershed Council, December 2020, Ashton, ID. Dec. 8, 2020 December 2020
McLaren, J., P. Budy, S. Brothers, and R. Van Kirk. 2021. Fish like plants (but maybe not) and other stories from the Henry's Fork. Western Division AFS Annual Meeting, May 2021. Utah, virtual. May 12, 2021 May 2021
McLaren J.S., Mabaka A.J., Van Kirk R., Brothers S., Budy P. 2021. Beyond the 100th Meridian: a case study of the complex mechanisms by which drought-induced drawdown affect salmonid habitat and populations in a western U.S. irrigation storage reservoir. American Fisheries Society annual meeting, Baltimore, MD. Symposium: Back to the Future of Reservoir Science and Management: What have we learned in 50 years? November 6-10, 2021. November 2021
McLaren, J.S.; Van Kirk, R.; Brothers, S; Budy, P., Muradian, M. 2021. Just add water: how water supply to one reservoir controls water quality and fish habitat throughout the Henry’s Fork basin in Idaho. North American Lakes Management Society Annual Meeting, Oklahoma City, OK, 15-18 November 2021 November 2021
McLaren, J.S., R. Van Kirk, S. Brothers, P. Budy. 2022. Reservoir Drawdown vs. Kokanee in the Henrys Fork. Idaho Chapter of the American Fisheries Society Annual Meeting, Fort Hall, Idaho, March 1-4. Oral Presentation. March 2022
McLaren, J.S., R. Van Kirk, S. Brothers, P. Budy. 2022. A Living Substrate: the scale-dependent role of submerged macrophytes on trout habitat. Joint Aquatic Sciences Meeting, Grand Rapids, Michigan, May 14-20. Oral Presentation. May 2022