Dona Horan

Treesearch Publications

• Daniel J. Isaak, Michael Dumelle, Dona Horan, Daniel Mason, Thomas W. Franklin, David E. Nagel, Jay M. Ver Hoef, Michael K. Young. 2025. Improving species distribution models for stream networks by incorporating spatial autocorrelation in multi-sourced datasets: A range-wide assessment of Idaho giant salamander status and future risk
• Daniel J. Isaak, Dona Horan, David E. Nagel. 2025. The importance of trimming National Hydrography Dataset streamline networks when delineating potential habitats and species distributions for fish and amphibians in broad geographical applications
• David E. Nagel, Erin Peterson, Daniel J. Isaak, Michael Dumelle, Jay Ver Hoef, Dona Horan. 2024. National Stream Internet Protocol and User Guide
• Daniel J. Isaak, Dona Horan, Sherry P. Wollrab. 2024. Air temperature data source affects inference from statistical stream temperature models in mountainous terrain
• Joy Drohan, Daniel J. Isaak, Charlie H. Luce, Michael K. Young, Dona Horan, David E. Nagel, Sherry P. Wollrab, Gwynne L. Chandler, Scott Barndt, Yvette Converse, Sean Finn, Scott Spaulding, Brian Staab. 2024. Some good news on climate change: High mountain streams act as strongholds for cold-water species
• Michael K. Young, Daniel J. Isaak, David E. Nagel, Dona Horan, Kellie Carim, Thomas W. Franklin, Victoria Zeller, Brett Roper, Michael K. Schwartz. 2022. Broad-scale eDNA sampling for describing aquatic species distributions in running waters: Pacific lamprey Entosphenus tridentatus in the upper Snake River, USA
• Daniel J. Isaak, Michael K. Young, Dona Horan, David E. Nagel, Michael K. Schwartz, Kevin S. McKelvey. 2022. Do metapopulations and management matter for relict headwater bull trout populations in a warming climate?
• Daniel J. Isaak, Charlie H. Luce, Dona Horan, Gwynne L. Chandler, Sherry P. Wollrab, William B. Dubois, David E. Nagel. 2020. Thermal regimes of perennial rivers and streams in the western United States
• Daniel J. Isaak, Charlie H. Luce, Gwynne L. Chandler, Dona Horan, Sherry P. Wollrab. 2018. Principal components of thermal regimes in mountain river networks
• Taylor M. Wilcox, Michael K. Young, Kevin S. McKelvey, Daniel J. Isaak, Dona Horan, Michael K. Schwartz. 2018. Fine-scale environmental DNA sampling reveals climate-mediated interactions between native and invasive trout species
• Daniel J. Isaak, Michael K. Young, Cynthia Tait, Daniel Duffield, Dona Horan, David E. Nagel, Matthew C. Groce. 2018. Effects of climate change on native fish and other aquatic species [Chapter 5]
• Daniel J. Isaak, Charlie H. Luce, Dona Horan, Gwynne L. Chandler, Sherry P. Wollrab, David E. Nagel. 2018. Global warming of salmon and trout rivers in the northwestern U.S.: Road to ruin or path through purgatory?
• Michael K. Young, Daniel J. Isaak, Scott Spaulding, Cameron A. Thomas, Scott A. Barndt, Matthew C. Groce, Dona Horan, David E. Nagel. 2018. Climate vulnerability of native cold-water salmonids in the Northern Rockies Region [Chapter 5]
• Daniel J. Isaak, Seth J. Wenger, Erin E. Peterson, Jay M. Ver Hoef, David E. Nagel, Charlie H. Luce, Steven W. Hostetler, Jason B. Dunham, Brett B. Roper, Sherry P. Wollrab, Gwynne L. Chandler, Dona Horan, Sharon L. Payne. 2017. The NorWeST summer stream temperature model and scenarios for the western U.S.: A crowd-sourced database and new geospatial tools foster a user community and predict broad climate warming of rivers and streams
• Michael K. Young, Daniel J. Isaak, Kevin S. McKelvey, Taylor M. Wilcox, Matthew R. Campbell, Matthew P. Corsi, Dona Horan, Michael K. Schwartz. 2017. Ecological segregation moderates a climactic conclusion to trout hybridization
• Daniel J. Isaak, Katherine Ramsey, John C. Chatel, Deborah L. Konnoff, Robert A. Gecy, Dona Horan. 2017. Climate change, fish, and aquatic habitat in the Blue Mountains [Chapter 5]
• Daniel J. Isaak, Jay M. Ver Hoef, Erin E. Peterson, Dona Horan, David E. Nagel. 2017. Scalable population estimates using spatial-stream-network (SSN) models, fish density surveys, and national geospatial database frameworks for streams
• Michael K. Young, Daniel J. Isaak, Kevin S. McKelvey, Taylor M. Wilcox, Daniel M. Bingham, Kristine L. Pilgrim, Kellie Carim, Matthew R. Campbell, Matthew P. Corsi, Dona Horan, David E. Nagel, Michael K. Schwartz. 2016. Climate, demography, and zoogeography predict introgression thresholds in salmonid hybrid zones in Rocky Mountain streams
• Daniel J. Isaak, Michael K. Young, Charlie H. Luce, Steven W. Hostetler, Seth J. Wenger, Erin E. Peterson, Jay M. Ver Hoef, Matthew C. Groce, Dona Horan, David E. Nagel. 2016. Slow climate velocities of mountain streams portend their role as refugia for cold-water biodiversity
• Daniel J. Isaak, Michael K. Young, David E. Nagel, Dona Horan, Matthew C. Groce. 2015. The cold-water climate shield: Delineating refugia for preserving salmonid fishes through the 21st century
• Daniel J. Isaak, Michael K. Young, David E. Nagel, Dona Horan. 2014. Cold water as a climate shield to preserve native trout through the 21st Century
• Douglas P. Peterson, Bruce E. Rieman, Dona Horan, Michael K. Young. 2014. Patch size but not short-term isolation influences occurrence of westslope cutthroat trout above human-made barriers
• Daniel J. Isaak, Dona Horan, Sherry P. Wollrab. 2013. A simple protocol using underwater epoxy to install annual temperature monitoring sites in rivers and streams
• Daniel J. Isaak, Sherry P. Wollrab, Dona Horan, Gwynne L. Chandler. 2011. Climate change effects on stream and river temperatures across the northwest U.S. from 1980-2009 and implications for salmonid fishes
• Seth J. Wenger, Daniel J. Isaak, Jason B. Dunham, Kurt D. Fausch, Charlie H. Luce, Helen M. Neville, Bruce E. Rieman, Michael K. Young, David E. Nagel, Dona Horan, Gwynne L. Chandler. 2011. Role of climate and invasive species in structuring trout distributions in the interior Columbia River Basin, USA
• Daniel J. Isaak, Dona Horan. 2011. An evaluation of underwater epoxies to permanently install temperature sensors in mountain streams
• Daniel J. Isaak, Charlie H. Luce, Bruce E. Rieman, David E. Nagel, Erin E. Peterson, Dona Horan, Sharon L. Payne, Gwynne L. Chandler. 2010. Effects of climate change and wildfire on stream temperatures and salmonid thermal habitat in a mountain river network
• Daniel J. Isaak, Bruce Rieman, Dona Horan. 2009. A watershed-scale monitoring protocol for bull trout
• Bruce E. Rieman, Daniel J. Isaak, Susan B. Adams, Dona Horan, David E. Nagel, Charlie H. Luce, Deborah Myers. 2007. Anticipated climate warming effects on bull trout habitats and populations across the interior Columbia River basin
• Christopher C. Downs, Dona Horan, Erin Morgan-Harris, Robert Jakubowski. 2006. Spawning demographics and juvenile dispersal of an adfluvial bull trout population in Trestle Creek, Idaho

Data and Tools

• Tool
  

  NorWeST stream temperature interactive map

  https://research.fs.usda.gov/rmrs/products/dataandtools/norwest-stream-temperature-interactive-map
• Tool
  

  Aquatic eDNAtlas Project: eDNA field sampling grid for the Western U.S.

  https://research.fs.usda.gov/rmrs/products/dataandtools/aquatic-ednatlas-project-edna-field-sampling-grid-western-us
• Tool
  

  Aquatic eDNAtlas Project: Lab results map

  https://research.fs.usda.gov/rmrs/products/dataandtools/aquatic-ednatlas-project-lab-results-map

• Project
  

  NorWeST

  https://research.fs.usda.gov/rmrs/projects/norwest
  Station

  Rocky Mountain Research Station
• Project
  

  Aquatic eDNAtlas

  https://research.fs.usda.gov/rmrs/projects/ednatlas
  Station

  Rocky Mountain Research Station
• Project
  

  Spatial Stream Network (SSN)

  https://research.fs.usda.gov/rmrs/projects/spatial-stream-network
  Station

  Rocky Mountain Research Station
• Program
  

  Water and Watersheds

  https://research.fs.usda.gov/rmrs/programs/waterwatersheds
  Station

  Rocky Mountain Research Station
• Project
  

  Bull Trout eDNA

  https://research.fs.usda.gov/rmrs/projects/bull-trout-edna
  Station

  Rocky Mountain Research Station

• University of California, Berkeley, B.S., Wildlife Management, 1992
• Utah State University, M.S., Fisheries Management, 1996