David E. Nagel

Physical Scientist/Spatial Analyst

Rocky Mountain Research Station

david.nagel@usda.gov

Publications & Products
Related
Education

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
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, Michael K. Young, Callie McConnell, Brett B. Roper, Eric K. Archer, Brian Staab, Christine Hirsch, David E. Nagel, Michael K. Schwartz, Gwynne L. Chandler. 2018. Crowd-sourced databases as essential elements for Forest Service partnerships and aquatic resource conservation
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
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
David E. Nagel, John M. Buffington, Sharon L. Payne, Seth Wenger, Jaime Goode. 2014. A landscape scale valley confinement algorithm: Delineating unconfined valley bottoms for geomorphic, aquatic, and riparian applications
Jaime Goode, John M. Buffington, Daniele Tonina, Daniel J. Isaak, Russ F. Thurow, Seth Wenger, David E. Nagel, Charlie H. Luce, Doerthe Tetzlaff, Chris Soulsby. 2013. Potential effects of climate change on streambed scour and risks to salmonid survival in snow-dominated mountain basins
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, 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
Jack D. Alexander III, Jean Findley, Brenda K. Kury, Jan L. Beyers, Douglas S. Cram, Terrell T. Baker, Jon C. Boren, Carl Edminster, Sue A. Ferguson, Steven McKay, David E. Nagel, Trent Piepho, Miriam Rorig, Casey Anderson, Jeanne Hoadley, Paulette L. Ford, Mark C. Andersen, Ed L. Fredrickson, Joe Truett, Gary W. Roemer, Brenda K. Kury, Jennifer Vollmer, Christine L. May, Danny C. Lee, James Menakis, Robert E. Keane, Zhi-Liang Zhu, Carol L. Miller, Brett H. Davis, Katharine Gray, Ken Mix, William P. Kuvlesky Jr., D. Lynn Drawe, Marcia G. Narog, Roger D. Ottmar, Robert E. Vihnanek, Clinton S. Wright, Timothy Paysen, Burton K. Pendleton, Rosemary L. Pendleton, Carleton S. White, John Rogan, Doug Stow, Janet Franklin, Carol L. Miller, Lisa Levien, Chris Fischer, Emma Underwood, Robert Klinger, Peggy Moore, Clinton Wright. 2008. Poster Session- Extended Abstracts
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
Sue A. Ferguson, Steven J. McKay, David E. Nagel, Trent Piepho, Miriam Rorig, Casey Anderson, Lara Kellogg. 2003. Assessing values of air quality and visibility at risk from wildland fires.

Citations of Non-Forest Service Publications

Chandler, G.L.; Wollrab, S.P.; Horan, D. L.; Nagel, D. E.; Parkes, S.L.; Isaak, D.J.; Horan, D.L; Wenger, S.J.; Peterson, E.E.; Ver Hoef, J.M.; Hostetler, S.W.; Luce, C.H.; Dunham, J.B.; Kershner, J.L.; Roper, B.B. 2016. NorWeST stream temperature data summaries for the western U.S. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2016-0032.
Isaak, D.J.; Wenger, S.J.; Peterson, E.E.; Ver Hoef, J.M.; Hostetler, S.W.; Luce, C.H.; Dunham, J.B.; Kershner, J.L.; Roper, B.B.; Nagel, D.E.; Chandler, G.L.; Wollrab, S.P.; Parkes, S.L.; Horan, D.L. 2016. NorWeST modeled summer stream temperature scenarios for the western U.S. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2016-0033.
Young, Michael K.; Isaak, Daniel J.; McKelvey, Kevin S.; Schwartz, Michael K.; Carim, Kellie J.; Fredenberg, Wade; Wilcox, Taylor M.; Franklin, Thomas W.; Chandler, Gwynne L.; Nagel, David E.; Parkes-Payne, Sharon L.; Horan, Dona L.; Wollrab, Sherry P. 2017. Species occurrence data from the Range-Wide Bull Trout eDNA Project. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2017-0038.
Schwartz, M. K., Young, M.K., McKelvey, K.S., Isaak, D.J., Nagel, D.E., Franklin, T.W., Greaves, S.E., Dysthe, J.C., Chandler, G.L., Wollrab, S.P., Carim, K.J., Wilcox, T.M., Parkes-Payne, S.L., Horan, D.L. 2018. Species occurrence data from the Aquatic eDNAtlas database. Fort Collins, CO: Forest Service Research Data Archive. DOI Pending.