Blake Lowrey, Ph.d.
My research focuses on migration and disease ecology as well as the habitat requirements of temperate ungulates. I use modern techniques, software, and applications to address important ecological questions that support species management and ecosystem conservation.
Professional Experience
Present: Biologist, USGS Northern Rocky Mountain Science Center, Bozeman, MT
Education and Certifications
Ph.D. Fish and Wildlife Biology Fish and Wildlife Ecology and Management Program, Department of Ecology, Montana State University. 2018.
MS Systems Ecology Systems Ecology Program, University of Montana. 2013
Science and Products
USGS Chronic Wasting Disease Research at NOROCK
Chronic wasting disease (CWD) is a growing management issue in the U.S. and has been detected in 36 states as of April 2025, including many western states. There is no cure or vaccine for CWD, and the disease threatens economically important animals like elk and deer. NOROCK scientists have taken a multi-pronged approach to develop actionable science including 1) evaluating CWD management options...
The influence of natural mineral licks on wildlife disease dynamics
Some locations on the landscape can aggregate animals of multiple species and could become hotspots of disease transmission. One example of this are areas of localized concentrations of minerals that animals like deer, elk, bighorn sheep, and mountain goats use and diseases like chronic wasting disease or respiratory diseases could spread among or within species who use natural mineral licks...
Corridor Mapping Team: Ungulate Migrations of the West
Advancing the conservation and understanding of Wyoming's migratory hooved animals (mule deer, elk, pronghorn, etc.). The Wyoming Cooperative Fish and Wildlife Research Unit is led by USGS federal researchers. The Wyoming Migration Initiative is a University of Wyoming’s Zoology and Physiology Department-based collaborative of biologists, photographers, mapmakers, and writers working to research...
Ungulate Migrations of the Western United States, Volume 5
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 5 and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations and seasonal ranges. This data release provides the means for ungulate migrations to be mapped and...
Ungulate Migrations of the Western United States, Volume 4
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 4 and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations and seasonal ranges. This data release provides the means for ungulate migrations to be mapped and...
Ungulate Migrations of the Western United States, Volume 3
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 3 (Kauffman et al. 2022) and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations. This data release provides the means for ungulate migrations to be mapped and...
Ungulate Migrations of the Western United States, Volume 2
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 2 (Kauffman et al. 2022) and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations. This data release provides the means for ungulate migrations to be mapped and...
Ungulate migrations of the Western United States, volume 5
Many ungulates migrate between distinct summer and winter ranges to take advantage of spatially and temporally variable food sources and avoid threats such as predators and deep snow. In 2018, the U.S. Department of the Interior established Secretarial Order 3362, which provided Federal support to expand existing research efforts to study ungulate populations and conserve their...
Authors
Matthew Kauffman, Blake Lowrey, Jennifer L. McKee, Travis Allen, Chloe Beaupre, Jeffrey L. Beck, Scott Bergen, Justin Binfet, Shelly Blair, James W. Cain, Peyton Carl, Todd Cornish, Michelle L. Cowardin, Rachel Curtis, Melia DeVivo, Jennifer Diamond, Katie M. Dugger, Orrin Duvuvuei, C.J. Ellingwood, Darby Finely, Jessica Fort, Eric Freeman, Ian Freeman, Jeff Gagnon, Emily Gelzer, Jacob Gray, Evan Greenspan, Curtis Hendricks, Valerie Hinojoza-Rood, Matthew Jeffress, Carolyn A. Kyle, Zach Lockyer, Cody McKee, Jerod A. Merkle, Jerrod Merrell, Matthew A. Mumma, Jake Powell, Craig D. Reddell, Adele K. Reinking, Robert Ritson, Sierra Robatcek, Benjamin Seward Robb, Brianna M. Russo, Hall Sawyer, Cody Schroeder, Elissa Slezak, Scott Sprague, Erik Steiner, Alethea Steingisser, Thomas Stephenson, Nicole M. Tatman, Kaitlyn L. Taylor, Don Whittaker, Travis Zaffarano
Estimating ungulate migration corridors from sparse movement data
Many ungulates migrate between distinct summer and winter ranges, and identifying, mapping, and conserving these migration corridors have become a focus of local, regional, and global conservation efforts. Brownian bridge movement models (BBMMs) are commonly used to empirically identify these seasonal migration corridors; however, they require location data sampled at relatively frequent...
Authors
Jennifer L. McKee, Julien Fattebert, Ellen O. Aikens, Jodi Berg, Scott Bergen, Eric K. Cole, Holly E. Copeland, Alyson B. Courtemanch, Sarah Dewey, Mark Hurley, Blake Lowrey, Jerod A. Merkle, Arthur D. Middleton, Tristan A. Nuñez, Hall Sawyer, Matthew Kauffman
Infection–nutrition feedbacks: Fat supports pathogen clearance but pathogens reduce fat in a wild mammal
Though far less obvious than direct effects (clinical disease or mortality), the indirect influences of pathogens are difficult to estimate but may hold fitness consequences. Here, we disentangle the directional relationships between infection and energetic reserves, evaluating the hypotheses that energetic reserves influence infection status of the host and that infection elicits costs...
Authors
Rachel A. Smiley, Brittany L. Wagler, William H. Edwards, Jessica Jennings-Gaines, Katie Luukkonen, Kara Robbins, Marguerite Johnson, Alyson B. Courtemanch, Tony W. Mong, Daryl Lutz, Douglas E. McWhirter, Jennifer L. Malmberg, Blake Lowrey, Kevin L. Monteith
Ungulate migrations of the Western United States, volume 4
Broadly distributed across the Western United States, ungulates (hooved mammals) play an important role in ecosystem function by affecting vegetation communities and forming the prey base for large carnivores. Additionally, ungulates provide economic benefits to regional communities through tourism and hunting and hold cultural significance for many Tribal communities. Many ungulates...
Authors
Matthew Kauffman, Blake Lowrey, Chloe Beaupre, Scott Bergen, Stefanie M. Bergh, Kevin Blecha, Samantha Bundick, Hunter Burkett, James W. Cain, Peyton Carl, David Casady, Corey Class, Alyson B. Courtemanch, Michelle L. Cowardin, Jennifer Diamond, Katie M. Dugger, Orrin Duvuvuei, Joanna R. Ennis, Michelle Flenner, Jessica Fort, Gary L. Fralick, Ian Freeman, Jeff Gagnon, David K. Garcelon, Kyle Garrison, Emily Gelzer, Evan Greenspan, Valerie Hinojoza-Rood, Patrick Hnilicka, Andy Holland, Brian Hudgens, Bart Kroger, Art Lawson, Cody McKee, Jennifer L. McKee, Jerod A. Merkle, Tony W. Mong, Haley Nelson, Brendan A. Oates, Marie-Pier Poulin, Craig D. Reddell, Robert Ritson, Hall Sawyer, Cody Schroeder, Jessie Shapiro, Scott Sprague, Erik Steiner, Alethea Steingisser, Sam Stephens, Blair Stringham, Patrick Ryan Swazo-Hinds, Nicole M. Tatman, Cody F. Wallace, Don Whittaker, Benjamin L. Wise, Heiko U. Wittmer, Erin Wood
Conserving habitat for migratory ungulates: How wide is a migration corridor?
Conserving migratory ungulates relies on the analysis of GPS collar data and associated maps of migration corridors to inform management and policy actions. Current methods for identifying migratory corridors use complex statistical models designed to account for movement uncertainty rather than estimating the amount of space required by animals to migrate. Furthermore, such methods can...
Authors
Jerod A. Merkle, Blake Lowrey, Cody F. Wallace, L. Flint Hall, Luke R. Wilde, Matthew Kauffman, Hall Sawyer
Ungulate migrations of the western United States, volume 3
Ungulates (hooved mammals) have a broad distribution across the western United States and play an important role in maintaining predator-prey dynamics, affecting vegetation communities, and providing economic benefits to regional communities through tourism and hunting. Throughout the diverse landscapes they occupy, many ungulate populations undertake seasonal migrations to exploit...
Authors
Matthew Kauffman, Blake Lowrey, Jodi Berg, Scott Bergen, Douglas G. Brimeyer, Patrick W. Burke, Teal Cufaude, James W. Cain, Jeffrey C. Cole, Alyson B. Courtemanch, Michelle L. Cowardin, Julie Cunningham, Melia DeVivo, Jennifer Diamond, Orrin Duvuvuei, Julien Fattebert, Joanna R. Ennis, Darby Finley, Jessica Fort, Gary L. Fralick, Eric Freeman, Jeff Gagnon, Julie Garcia, Emily Gelzer, Morgan Graham, Jacob Gray, Evan Greenspan, L. Flint Hall, Curtis Hendricks, Andy Holland, Brian Holmes, Katey S. Huggler, Mark A. Hurley, Emily Jeffreys, Aran Johnson, Lee Knox, Kevin Krasnow, Zach Lockyer, Hannah Manninen, Mike McDonald, Jennifer L. McKee, James Meacham, Jerod A. Merkle, Barb Moore, Tony W. Mong, Clayton Nielsen, Brendan A. Oates, Kim Olsen, Daniel Olson, Lucas Olson, Matt Pieron, Jake Powell, Annemarie Prince, Kelly Proffitt, Craig D. Reddell, Corinna Riginos, Robert Ritson, Sierra Robatcek, Shane B. Roberts, Hall Sawyer, Cody Schroeder, Jessie Shapiro, Nova Simpson, Scott Sprague, Alethea Steingisser, Nicole M. Tatman, Benjamin Turnock, Cody F. Wallace, Laura Wolf
Migration Mapper: Identifying movement corridors and seasonal ranges for large mammal conservation
Modern tracking technology has facilitated a novel understanding of terrestrial mammal movement while revealing that movements are being truncated and lost. The first step towards conserving mobile animals is identifying movement corridors and key seasonal ranges. Yet, the identification and subsequent mapping of these important areas has remained a challenge due to the analytical skills...
Authors
Jerod A. Merkle, Joshua A. Gage, Hall Sawyer, Blake Lowrey, Matthew Kauffman
Ungulate migrations of the western United States, volume 2
Migration is widespread across taxonomic groups and increasingly recognized as fundamental to maintaining abundant wildlife populations and communities. Many ungulate herds migrate across the western United States to access food and avoid harsh environmental conditions. With the advent of global positioning system (GPS) collars, researchers can describe and map the year-round movements...
Authors
Matthew Kauffman, Blake Lowrey, Jeffrey L. Beck, Jodi Berg, Scott Bergen, Joel Berger, James W. Cain, Sarah Dewey, Jennifer Diamond, Orrin Duvuvuei, Fattebert, Jeff Gagnon, Julia Garcia, Evan Greenspan, L. Embere Hall, Glenn Harper, Stan Harter, Kent R. Hersey, Patrick Hnilicka, Mark A. Hurley, Lee Knox, Art Lawson, Eric J. Maichak, James Meacham, Jerod A. Merkle, Arthur D. Middleton, Daniel Olson, Lucas Olson, Craig D. Reddell, Benjamin Seward Robb, Gabe Rozman, Hall Sawyer, Cody Schroeder, Brandon M. Scurlock, Jeff Short, Scott Sprague, Alethea Steingisser, Nicole M. Tatman
Science and Products
USGS Chronic Wasting Disease Research at NOROCK
Chronic wasting disease (CWD) is a growing management issue in the U.S. and has been detected in 36 states as of April 2025, including many western states. There is no cure or vaccine for CWD, and the disease threatens economically important animals like elk and deer. NOROCK scientists have taken a multi-pronged approach to develop actionable science including 1) evaluating CWD management options...
The influence of natural mineral licks on wildlife disease dynamics
Some locations on the landscape can aggregate animals of multiple species and could become hotspots of disease transmission. One example of this are areas of localized concentrations of minerals that animals like deer, elk, bighorn sheep, and mountain goats use and diseases like chronic wasting disease or respiratory diseases could spread among or within species who use natural mineral licks...
Corridor Mapping Team: Ungulate Migrations of the West
Advancing the conservation and understanding of Wyoming's migratory hooved animals (mule deer, elk, pronghorn, etc.). The Wyoming Cooperative Fish and Wildlife Research Unit is led by USGS federal researchers. The Wyoming Migration Initiative is a University of Wyoming’s Zoology and Physiology Department-based collaborative of biologists, photographers, mapmakers, and writers working to research...
Ungulate Migrations of the Western United States, Volume 5
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 5 and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations and seasonal ranges. This data release provides the means for ungulate migrations to be mapped and...
Ungulate Migrations of the Western United States, Volume 4
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 4 and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations and seasonal ranges. This data release provides the means for ungulate migrations to be mapped and...
Ungulate Migrations of the Western United States, Volume 3
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 3 (Kauffman et al. 2022) and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations. This data release provides the means for ungulate migrations to be mapped and...
Ungulate Migrations of the Western United States, Volume 2
This is the data archive for the publication Ungulate Migrations of the Western United States, Volume 2 (Kauffman et al. 2022) and includes the collection of GIS map files that are mapped and described in the report. These map files are meant to provide a common spatial representation of the mapped migrations. This data release provides the means for ungulate migrations to be mapped and...
Ungulate migrations of the Western United States, volume 5
Many ungulates migrate between distinct summer and winter ranges to take advantage of spatially and temporally variable food sources and avoid threats such as predators and deep snow. In 2018, the U.S. Department of the Interior established Secretarial Order 3362, which provided Federal support to expand existing research efforts to study ungulate populations and conserve their...
Authors
Matthew Kauffman, Blake Lowrey, Jennifer L. McKee, Travis Allen, Chloe Beaupre, Jeffrey L. Beck, Scott Bergen, Justin Binfet, Shelly Blair, James W. Cain, Peyton Carl, Todd Cornish, Michelle L. Cowardin, Rachel Curtis, Melia DeVivo, Jennifer Diamond, Katie M. Dugger, Orrin Duvuvuei, C.J. Ellingwood, Darby Finely, Jessica Fort, Eric Freeman, Ian Freeman, Jeff Gagnon, Emily Gelzer, Jacob Gray, Evan Greenspan, Curtis Hendricks, Valerie Hinojoza-Rood, Matthew Jeffress, Carolyn A. Kyle, Zach Lockyer, Cody McKee, Jerod A. Merkle, Jerrod Merrell, Matthew A. Mumma, Jake Powell, Craig D. Reddell, Adele K. Reinking, Robert Ritson, Sierra Robatcek, Benjamin Seward Robb, Brianna M. Russo, Hall Sawyer, Cody Schroeder, Elissa Slezak, Scott Sprague, Erik Steiner, Alethea Steingisser, Thomas Stephenson, Nicole M. Tatman, Kaitlyn L. Taylor, Don Whittaker, Travis Zaffarano
Estimating ungulate migration corridors from sparse movement data
Many ungulates migrate between distinct summer and winter ranges, and identifying, mapping, and conserving these migration corridors have become a focus of local, regional, and global conservation efforts. Brownian bridge movement models (BBMMs) are commonly used to empirically identify these seasonal migration corridors; however, they require location data sampled at relatively frequent...
Authors
Jennifer L. McKee, Julien Fattebert, Ellen O. Aikens, Jodi Berg, Scott Bergen, Eric K. Cole, Holly E. Copeland, Alyson B. Courtemanch, Sarah Dewey, Mark Hurley, Blake Lowrey, Jerod A. Merkle, Arthur D. Middleton, Tristan A. Nuñez, Hall Sawyer, Matthew Kauffman
Infection–nutrition feedbacks: Fat supports pathogen clearance but pathogens reduce fat in a wild mammal
Though far less obvious than direct effects (clinical disease or mortality), the indirect influences of pathogens are difficult to estimate but may hold fitness consequences. Here, we disentangle the directional relationships between infection and energetic reserves, evaluating the hypotheses that energetic reserves influence infection status of the host and that infection elicits costs...
Authors
Rachel A. Smiley, Brittany L. Wagler, William H. Edwards, Jessica Jennings-Gaines, Katie Luukkonen, Kara Robbins, Marguerite Johnson, Alyson B. Courtemanch, Tony W. Mong, Daryl Lutz, Douglas E. McWhirter, Jennifer L. Malmberg, Blake Lowrey, Kevin L. Monteith
Ungulate migrations of the Western United States, volume 4
Broadly distributed across the Western United States, ungulates (hooved mammals) play an important role in ecosystem function by affecting vegetation communities and forming the prey base for large carnivores. Additionally, ungulates provide economic benefits to regional communities through tourism and hunting and hold cultural significance for many Tribal communities. Many ungulates...
Authors
Matthew Kauffman, Blake Lowrey, Chloe Beaupre, Scott Bergen, Stefanie M. Bergh, Kevin Blecha, Samantha Bundick, Hunter Burkett, James W. Cain, Peyton Carl, David Casady, Corey Class, Alyson B. Courtemanch, Michelle L. Cowardin, Jennifer Diamond, Katie M. Dugger, Orrin Duvuvuei, Joanna R. Ennis, Michelle Flenner, Jessica Fort, Gary L. Fralick, Ian Freeman, Jeff Gagnon, David K. Garcelon, Kyle Garrison, Emily Gelzer, Evan Greenspan, Valerie Hinojoza-Rood, Patrick Hnilicka, Andy Holland, Brian Hudgens, Bart Kroger, Art Lawson, Cody McKee, Jennifer L. McKee, Jerod A. Merkle, Tony W. Mong, Haley Nelson, Brendan A. Oates, Marie-Pier Poulin, Craig D. Reddell, Robert Ritson, Hall Sawyer, Cody Schroeder, Jessie Shapiro, Scott Sprague, Erik Steiner, Alethea Steingisser, Sam Stephens, Blair Stringham, Patrick Ryan Swazo-Hinds, Nicole M. Tatman, Cody F. Wallace, Don Whittaker, Benjamin L. Wise, Heiko U. Wittmer, Erin Wood
Conserving habitat for migratory ungulates: How wide is a migration corridor?
Conserving migratory ungulates relies on the analysis of GPS collar data and associated maps of migration corridors to inform management and policy actions. Current methods for identifying migratory corridors use complex statistical models designed to account for movement uncertainty rather than estimating the amount of space required by animals to migrate. Furthermore, such methods can...
Authors
Jerod A. Merkle, Blake Lowrey, Cody F. Wallace, L. Flint Hall, Luke R. Wilde, Matthew Kauffman, Hall Sawyer
Ungulate migrations of the western United States, volume 3
Ungulates (hooved mammals) have a broad distribution across the western United States and play an important role in maintaining predator-prey dynamics, affecting vegetation communities, and providing economic benefits to regional communities through tourism and hunting. Throughout the diverse landscapes they occupy, many ungulate populations undertake seasonal migrations to exploit...
Authors
Matthew Kauffman, Blake Lowrey, Jodi Berg, Scott Bergen, Douglas G. Brimeyer, Patrick W. Burke, Teal Cufaude, James W. Cain, Jeffrey C. Cole, Alyson B. Courtemanch, Michelle L. Cowardin, Julie Cunningham, Melia DeVivo, Jennifer Diamond, Orrin Duvuvuei, Julien Fattebert, Joanna R. Ennis, Darby Finley, Jessica Fort, Gary L. Fralick, Eric Freeman, Jeff Gagnon, Julie Garcia, Emily Gelzer, Morgan Graham, Jacob Gray, Evan Greenspan, L. Flint Hall, Curtis Hendricks, Andy Holland, Brian Holmes, Katey S. Huggler, Mark A. Hurley, Emily Jeffreys, Aran Johnson, Lee Knox, Kevin Krasnow, Zach Lockyer, Hannah Manninen, Mike McDonald, Jennifer L. McKee, James Meacham, Jerod A. Merkle, Barb Moore, Tony W. Mong, Clayton Nielsen, Brendan A. Oates, Kim Olsen, Daniel Olson, Lucas Olson, Matt Pieron, Jake Powell, Annemarie Prince, Kelly Proffitt, Craig D. Reddell, Corinna Riginos, Robert Ritson, Sierra Robatcek, Shane B. Roberts, Hall Sawyer, Cody Schroeder, Jessie Shapiro, Nova Simpson, Scott Sprague, Alethea Steingisser, Nicole M. Tatman, Benjamin Turnock, Cody F. Wallace, Laura Wolf
Migration Mapper: Identifying movement corridors and seasonal ranges for large mammal conservation
Modern tracking technology has facilitated a novel understanding of terrestrial mammal movement while revealing that movements are being truncated and lost. The first step towards conserving mobile animals is identifying movement corridors and key seasonal ranges. Yet, the identification and subsequent mapping of these important areas has remained a challenge due to the analytical skills...
Authors
Jerod A. Merkle, Joshua A. Gage, Hall Sawyer, Blake Lowrey, Matthew Kauffman
Ungulate migrations of the western United States, volume 2
Migration is widespread across taxonomic groups and increasingly recognized as fundamental to maintaining abundant wildlife populations and communities. Many ungulate herds migrate across the western United States to access food and avoid harsh environmental conditions. With the advent of global positioning system (GPS) collars, researchers can describe and map the year-round movements...
Authors
Matthew Kauffman, Blake Lowrey, Jeffrey L. Beck, Jodi Berg, Scott Bergen, Joel Berger, James W. Cain, Sarah Dewey, Jennifer Diamond, Orrin Duvuvuei, Fattebert, Jeff Gagnon, Julia Garcia, Evan Greenspan, L. Embere Hall, Glenn Harper, Stan Harter, Kent R. Hersey, Patrick Hnilicka, Mark A. Hurley, Lee Knox, Art Lawson, Eric J. Maichak, James Meacham, Jerod A. Merkle, Arthur D. Middleton, Daniel Olson, Lucas Olson, Craig D. Reddell, Benjamin Seward Robb, Gabe Rozman, Hall Sawyer, Cody Schroeder, Brandon M. Scurlock, Jeff Short, Scott Sprague, Alethea Steingisser, Nicole M. Tatman