Christopher Schalk, PhD

Treesearch Publications

• Daniel J. Herrera, Christopher Schalk, Andrew Gray, Margaret Woodbridge, Deanna H. Olson, Michael V. Cove. 2026. Leveraging United States Forest Inventory Analysis data to project mature and old-growth forest conditions, with three wildlife case studies showing utility
• Kyra S. Woytek, Daniel Saenz, Daniel J. Herrera, William I. Lutterschmidt, Christopher Schalk. 2026. Alligator snapping turtle (Macrochelys temminckii) occupancy increases in higher-order streams
• Brigit Rooney, Roland Kays, Michael V. Cove, Jensen Alex, Daniel J. Herrera, Camilla Price, Phuong-Thao Nguyen‐Nu, Katrina Adamczyk, Peter D. Alexander, David Allen, Jesse M. Alston, Diego F. Alvarado‐Serrano, Thomas L. Anderson, Cara L. Appel, Scott M. Appleby, Anne C. Axel, Christopher R. Ayers, Nicholas W. Bakner, Dylan L. Bakner, Griffin Bandler, Luke Banta, Erin E. Barding, Carolina Baruzzi, William T. Bean, Silas C. Beers, Jerrold L. Belant, John F. Benson, Anna Berg, Dylan L. Bergman, Meagan A. Bethel, Tori Bird, Michael T. Booth, Aaron J. Bossert, LaRoy S. E. Brandt, Levin C. Brandt, Zeuk Brown, Erin K. Buchholtz, Richard Buchholz, Frances E. Buderman, Kathleen A. Carey, Michael B. Carpenter, Kellie Carter, Ivan Castro‐Arellano, Michael Chamberlain, Amanda E. Cheeseman, Michael D. Cheng, Cary D. Chevalier, M. Colter Chitwood, Petros Chrysafis, Bradley S. Cohen, Isabella R. Collamati, D. Parks Collins, Justin A. Compton, L. Mike Conner, Brianna Cook, Olivia Cosby, Anthony P. Crupi, Andrea K. Darracq, Jon M. Davenport, Drew R. Davis, Miranda L. Davis, Noé U. de la Sancha, Brett A. DeGregorio, Anant Deshwal, Art Drauglis, Jonathan E. Dudko, Jennifer M. Duggan, Andrew J. Edelman, Valerie Elder, Kendall Eldredge, E. Hance Ellington, Susan N. Ellis‐Felege, Caroline N. Ellison, John Erb, Alexa Fairchild, Keilani Fang, Jean Fantle‐Lepczyk, Michael Fargione, Zach J. Farris, Zoë Fassett‐Manuszewski, Alexander M. Ferentinos, Adam W. Ferguson, M. Caitlin Fisher‐Reid, Elizabeth A. Flaherty, Jared Franklin, Sarah R. Fritts, Brel Froebe, Jeremy Fuller, Laken S. Ganoe, Carissa Ganong, Ricky Garibay, Lisa J. Gatens, Francis D. Gerraty, Sean T. Giery, Jessica L. Glasscock, Erim Gómez, Louis E. Good, Gabriel P. Gott, Natasha J. Gownaris, Steven M. Gray, Austin M. Green, Kevin E. Green, Jasmine K. Grewal, Joseph M. Guthrie, Blake A. Halbert, Matthew T. Hallett, Ethan J. Halstead, Christopher P. Hansen, Lonnie P. Hansen, Eamon J. Harrity, Steven C. Hasstedt, Taylor A. Hickman, Angela Holland, Carolin A. Humpal, Brigit R. Humphreys, Aaron Hunt, Heide D. Island, Reagan Jarrett, Alex M. Johnson, Tamara L. Johnstone‐Yellin, Michael J. Joyce, Stanley Jozokos, Gaby C. Karakcheyeva, Keith Keel, Kevin Kinser‐McBee, Matt Kleitch, Travis Knowles, Molly M. Koeck, Brooks A. Kohli, Macy A. Krishnamoorthy, Kellie M. Kuhn, Diana J. R. Lafferty, Scott LaPoint, Brody Allan Larkin, Marcus Lashley, Richard G. Lathrop, Thomas E. Lee, Christopher A. Lepczyk, Damon B. Lesmeister, Christopher Schalk. 2026. SNAPSHOT USA 2024: Year 6 of the coordinated national camera trap survey of the United States
• Benjamin O. Knapp, Jacob S. Fraser, Joanne Baggs, Vikram Chhatre, David Clabo, Connor D. Crouch, Daniel C. C. Dey, Shaik M. Hossain, Steven B. Jack, John M. Kabrick, Kathryn R. Kidd, Steve McNulty, Carl Nordman, Matthew G. Olson, Kyle Palmquist, Matthew Pelkki, Christopher Schalk, Michael C. Stambaugh, J. Morgan Varner, John Willis. 2026. Shortleaf Pine (Pinus echinata): Management Challenges, Knowledge Gaps, and Opportunities for an Unsung Species
• John Willis, Christopher Schalk, Josh B. Pierce. 2025. Seed removal patterns of fire-sensitive tree species on floodplain and upland sites in the absence of fire
• Roland Kays, Michael V Cove, Alex Jensen, Benjamin R. Goldstein, Christopher Pate, Brigit Rooney, Paula Castiblanco, Maggie E. Abell, Jessie Adley, Briana Agenbroad, Adam A. Ahlers, Peter D. Alexander, David Allen, Maximilian L. Allen, Jesse M. Alston, Mohammad Alyetama, Thomas L. Anderson, Raul Andrade, Christine Anhalt‐Depies, Cara L. Appel, Leslie Armendariz, Christopher R. Ayers, Amy B. Baird, Cara Bak, Griffin Bandler, Erin E. Barding, Evan G. Barr, Carolina Baruzzi, Kelli Bashaw, Silas C. Beers, Jerrold L. Belant, Emma Bell, John F. Benson, Anna Berg, Dylan L. Bergman, Brandon M. Bernhardt, Meagan A. Bethel, Tori Bird, Amanda B. Bishop, Daniel A. Bogan, LaRoy Brandt, Levin C. Brandt, Aidan B. Branney, Chloe Bratton, Claire E. Bresnan, Jarred M. Brooke, Erin K. Buchholtz, Frances Buderman, Alexandra D. Burnett, Emily E. Burns, Domnique A. Byrd, Susan A. Cannella, Kathleen A. Carey, William A. Carlile, Kellie L. Carter, Brenna J. Cassidy, Ivan Castro‐Arellano, Sara Cendejas‐Zarelli, Nilanjan Chatterjee, Amanda E. Cheeseman, Cary Chevalier, M. Colter Chitwood, Petros Chrysafis, Bret Aaron Collier, D. Parks Collins, Justin A. Compton, Rhea Cone, L. Mike Conner, Brianna L. Cook, Olivia G. Cosby, Stephanie S. Coster, Anthony P. Crupi, Andrea K. Darracq, Jon M. Davenport, Devin Davis, Drew R. Davis, Miranda L. Davis, Rebecca J. Davis, Brett A. DeGregorio, Anant Deshwal, Kyle D. Dougherty, Art Drauglis, Caleb J. Durbin, Andrew J. Edelman, Valerie Elder, Blakely Eller, E. Hance Ellington, Susan N. Ellis‐Felege, Caroline N. Ellison, Jean E. Fantle‐Lepczyk, Jonathan J. Farr, Zach J. Farris, Shannon P. Finnegan, M. Caitlin Fisher‐Reid, Elizabeth A. Flaherty, Gabriela Franzoi Dri, Sarah Fritts, Jeremy Fuller, Travis Gallo, Laken S. Ganoe, Carissa N. Ganong, Ricky Garibay, Brian D. Gerber, Francis D. Gerraty, Sean T. Giery, Selena M. Gilyot, Jessica L. Glasscock, Ben Goldfarb, Louis E. Good, Gracie Granados, Austin M. Green, Jasmine K. Grewal, Andrew Grusenmeyer, Joseph M. Guthrie, Matthew T. Hallett, Chris Hansen, Lonnie P. Hansen, Clae Hanson, Eamon J. Harrity, Steven C. M. Hasstedt, Mark Hebblewhite, Daniel J. Herrera, Angela Holland, Brigit R. Humphreys, Heide D. Island, Alexander R. Jack, Emily P. Johansson, Alex M. Johnson, Luanne Johnson, Tamara L. Johnstone‐Yellin, Maria Luisa S. P. Jorge, Willaine Kahano, Molly M. Koeck, Michael A. Kinsey, Brier E. Klossing, Travis W. Knowles, John L. Koprowski, Kellie M. Kuhn, Erin K. Kuprewicz, Diana J. R. Lafferty, Jessica A. Lamberton‐Moreno, Travis J. Land, Avy M. Langston, Scott LaPoint, Erin N. Largent, Marcus A. Lashley, Richard G. Lathrop, Thomas E. Lee, Christopher A. Lepczyk, Damon B. Lesmeister, Evan Rehm, Christopher Schalk. 2025. SNAPSHOT USA 2019–2023: The first five years of data from a coordinated camera trap survey of the United States
• Carmen G. Montaña, Connor S. Adams, John M. Arnett, Christopher Schalk. 2025. Resource niche partitioning and overlap among native and non-native lizards in an urban environment
• Christopher Schalk, Jessica L. Glasscock, Tristan Brownjohn, Jonathan Edwards, Connor S. Adams. 2025. Efficacy of GPS-based satellite transmitters to monitor movement and nesting of alligator snapping turtles, Macrochelys temminckii (Troost, 1835)
• Daniel J. Herrera, Christopher Schalk, Alex J. Jensen, Benjamin R. Goldstein, Brigit R. Rooney, Roland Kays, William J. McShea, Michael V Cove. 2025. iNaturalist and structured mammal surveys reflect similar species richness but capture different species pools across the United States
• Luke T. Micek, Connor S. Adams, David R. Rosenbaum, Jessica L. Glasscock, John M. Arnett, Jake R. Swanson, Marc A. Moss, Ethan R. Menzel, Russel A. Reid, Steven C. Weiss, Cory K. Adams, Christopher Schalk. 2024. Maximum size, nesting, aestivation, and refugia of the alligator snapping turtle, Macrochelys temminckii Troost in Harlan, 1835, in east Texas, USA
• Roland Kays, Matthew H. Snider, George Hess, Michael V Cove, Alex Jensen, Hila Shamon, William J. McShea, Brigit Rooney, Maximilian L. Allen, Charles E. Pekins, Christopher C. Wilmers, Mary E. Pendergast, Austin M. Green, Justin Suraci, Matthew S. Leslie, Sophie Nasrallah, Dan Farkas, Mark Jordan, Melissa Grigione, Michael C. LaScaleia, Miranda L. Davis, Chris Hansen, Josh Millspaugh, Jesse S. Lewis, Michael Havrda, Robert Long, Kathryn R. Remine, Kodi J. Jaspers, Diana J. R. Lafferty, Tru Hubbard, Colin E. Studds, Erika L. Barthelmess, Katherine Andy, Andrea Romero, Brian J. O'Neill, Melissa T. R. Hawkins, Jason V Lombardi, Maksim Sergeyev, M. Caitlin Fisher‐Reid, Michael S. Rentz, Christopher Nagy, Jon M. Davenport, Christine C. Rega‐Brodsky, Cara L. Appel, Damon B. Lesmeister, Sean T. Giery, Christopher A. Whittier, Jesse M. Alston, Chris Sutherland, Christopher Rota, Thomas Murphy, Thomas E. Lee, Alessio Mortelliti, Dylan L. Bergman, Justin A. Compton, Brian D. Gerber, Jess Burr, Kylie Rezendes, Brett A. DeGregorio, Nathaniel H. Wehr, John F. Benson, M. Teague O'Mara, David S. Jachowski, Morgan Gray, Dean E. Beyer, Jerrold L. Belant, Robert V Horan, Robert C. Lonsinger, Kellie M. Kuhn, Steven C. M. Hasstedt, Marketa Zimova, Sophie M. Moore, Daniel J. Herrera, Sarah Fritts, Andrew J. Edelman, Elizabeth A. Flaherty, Tyler R. Petroelje, Sean A. Neiswenter, Derek R. Risch, Fabiola Iannarilli, Marius van der Merwe, Sean P. Maher, Zach J. Farris, Stephen L. Webb, David S. Mason, Marcus A. Lashley, Andrew M. Wilson, John P. Vanek, Samuel R. Wehr, L. Mike Conner, James C. Beasley, Carolina Baruzzi, Susan N. Ellis‐Felege, Mike D. Proctor, Jan Schipper, Katherine C. B. Weiss, Andrea K. Darracq, Evan G. Barr, Peter D. Alexander, Çağan H. Şekercioğlu, Daniel A. Bogan, Christopher Schalk, Jean E. Fantle‐Lepczyk, Christopher A. Lepczyk, Scott LaPoint, Helen L. Bontrager, Laura S. Whipple, Helen Ivy Rowe, Kayleigh Mullen, Tori Bird, Adam Zorn, LaRoy Brandt, Richard G. Lathrop, Craig McCain, Anthony P. Crupi, James Clark, Arielle Parsons. 2024. Climate, food and humans predict communities of mammals in the United States
• Hila Shamon, Roi Maor, Michael V Cove, Roland Kays, Jessie Adley, Peter D. Alexander, David N. Allen, Maximilian L. Allen, Cara L. Appel, Evan Barr, Erika L. Barthelmess, Carolina Baruzzi, Kelli Bashaw, Guillaume Bastille‐Rousseau, Madison E. Baugh, Jerrold Belant, John F. Benson, Bethany A. Bespoyasny, Tori Bird, Daniel A. Bogan, LaRoy S. E. Brandt, Claire E. Bresnan, Jarred M. Brooke, Frances E. Buderman, Suzannah G. Buzzell, Amanda E. Cheeseman, M. Colter Chitwood, Petros Chrysafis, Merri K. Collins, D. Parks Collins, Justin A. Compton, L. Mike Conner, Olivia G. Cosby, Stephanie S. Coster, Benjamin Crawford, Anthony P. Crupi, Andrea K. Darracq, Miranda L. Davis, Brett A. DeGregorio, Kimberly L. Denningmann, Kyle D. Dougherty, Ace Driver, Andrew J. Edelman, E. Hance Ellington, Susan N. Ellis‐Felege, Caroline N. Ellison, Jean E. Fantle‐Lepczyk, Zach J. Farris, Jorie Favreau, Pilar Fernandez, M. Caitlin Fisher‐Reid, Matthew C. Fitzpatrick, Elizabeth A. Flaherty, Tavis Forrester, Sarah R. Fritts, Travis Gallo, Brian D. Gerber, Sean T. Giery, Jessica L. Glasscock, Alex D. Gonatas, Anna C. Grady, Austin M. Green, Tremaine Gregory, Noel Griffin, Robert H. Hagen, Christopher P. Hansen, Lonnie P. Hansen, Steven C. Hasstedt, Haydée Hernández‐Yáñez, Daniel J. Herrera, Robert V Horan, Victoria L. Jackson, Luanne Johnson, Mark J. Jordan, Willaine Kahano, Joseph Kiser, Travis W. Knowles, Molly M. Koeck, Caroline Koroly, Kellie M. Kuhn, Erin K. Kuprewicz, Diana J. R. Lafferty, Scott D. LaPoint, Marcus Lashley, Richard G. Lathrop, Thomas E. Lee, Christopher A. Lepczyk, Damon B. Lesmeister, Jason V Lombardi, Robert A. Long, Robert C. Lonsinger, Paula MacKay, Sean P. Maher, David S. Mason, Joshua J. Millspaugh, Remington J. Moll, Jessica B. Moon, Alessio Mortelliti, Alexis M. Mychajliw, Christopher M. Nagy, Sean A. Neiswenter, Dana L. Nelson, Claire E. Nemes, Clayton K. Nielsen, Elizabeth Olson, M. Teague O'Mara, Brian J. O'Neill, Blake R. Page, Elizabeth Parsons, Brent S. Pease, Mary E. Pendergast, Mike Proctor, Heather Quick, Christine C. Rega‐Brodsky, Michael S. Rentz, Kylie Rezendes, Daric Rich, Derek R. Risch, Andrea Romero, Brigit R. Rooney, Christopher T. Rota, Corey A. Samples, Christopher Schalk, Çağan H. Sekercioğlu, Maksim Sergeyev, Austin B. Smith, Daniel S. Smith, Jinelle H. Sperry, Jennifer L. Stenglein, Michael K. Stokes, Johnathon S. Stutzman, Kimberly R. Todd, John P. Vanek, Wren Varga, Zachary M. Wardle, Stephen L. Webb, Nathaniel H. Wehr, Laura S. Whipple, Christopher A. Whittier, Jane S. Widness, Jacque Williamson, Andrew M. Wilson, Alexander J. Wolf, Marketa Zimova, Adam S. Zorn, William J. McShea. 2024. SNAPSHOT USA 2021: A third coordinated national camera trap survey of the United States
• Connor S. Adams, Daniel Saenz, Stephen J. Mullin, K. Rebecca Kidd, Christopher Schalk. 2024. The influence of management practice on the snakes in forest food webs
• Connor S. Adams, Sophia Gartenstein, Josh B. Pierce, Jessica L. Glasscock, Christopher Schalk. 2024. Movement patterns, home range, and microhabitat use of alligator snapping turtles (Macrochelys temminckii) in a small east Texas stream system
• John Willis, Don C. Bragg, Jeffery B. Cannon, Kamal J.K. Gandhi, Kathryn R. Kidd, Adam D. Polinko, Joshua J. Puhlick, Dan Saenz, Mary Anne Sayer, Christopher Schalk, Andrew B. Self, Courtney M. Siegert, J. Morgan. Varner. 2024. Does Restoring Woodland Structure with Loblolly or Slash Pine Produce Desired Ecosystem Functions?
• Virginia McDaniel, Gabriel L. De Jong, Christopher Schalk. 2024. Plant Succession Following Dozer Line Installation Through a Shale Woodland Glade on the Ouachita National Forest in Arkansas
• David Rosenbaum, Carmen G. Montaña, Yanli Zhang, Matthew M. Chumchal, Daniel Saenz, Christopher Schalk. 2024. Intraspecific variation in mercury contamination of alligator snapping turtles (Macrochelys temminckii)
• Christopher Beirne, Kaitlyn M. Gaynor, Catherine Sun, A. Cole Burton, Alys Granados, Maximilian L. Allen, Jesse M. Alston, Guilherme C. Alvarenga, Francisco Samuel Álvarez Calderón, Zachary Amir, Christine Anhalt-Depies, Cara Appel, Stephanny Arroyo-Arce, Guy Balme, Avi Bar-Massada, Daniele Barcelos, Evan Barr, Erika L. Barthelmess, Carolina Baruzzi, Sayantani M. Basak, Natalie Beenaerts, Jonathan Belmaker, Olgirda Belova, Branko Bezarević, Tori Bird, Daniel A. Bogan, Neda Bogdanović, Andy Boyce, Mark Boyce, LaRoy Brandt, Jedediah F. Brodie, Jarred Brooke, Jakub W. Bubnicki, Francesca Cagnacci, Benjamin Scott Carr, João Carvalho, Jim Casaer, Rok Černe, Ron Chen, Emily Chow, Marcin Churski, Connor Cincotta, Duško Ćirović, T. D. Coates, Justin Compton, Courtney Coon, Michael V Cove, Anthony P. Crupi, Simone Dal Farra, Andrea K. Darracq, Miranda Davis, Kimberly Dawe, Valerie De Waele, Esther Descalzo, Tom A. Diserens, Jakub Drimaj, Martin Duľa, Susan Ellis-Felege, Robert Hagen, Steven Hammerich, Catharine Hanekom, Christopher Hansen, Steven Hasstedt, Mark Hebblewhite, Marco Heurich, Tim R. Hofmeester, Tru Hubbard, David Jachowski, Caroline Ellison, Alper Ertürk, Jean Fantle-Lepczyk, Jorie Favreau, Mitch Fennell, Pablo Ferreras, Francesco Ferretti, Christian Fiderer, Laura Finnegan, Jason T. Fisher, M. Caitlin Fisher-Reid, Elizabeth A. Flaherty, Urša Fležar, Jiří Flousek, Jennifer M. Foca, Adam Ford, Barbara Franzetti, Sandra Frey, Sarah Fritts, Šárka Frýbová, Brett Furnas, Brian Gerber, Hayley M. Geyle, Diego G. Giménez, Anthony J. Giordano, Tomislav Gomercic, Matthew E. Gompper, Diogo Maia Gräbin, Morgan Gray, Austin Green, Robert Hagen, Patrick A. Jansen, Alex Jensen, Mark Jordan, Mariane C. Kaizer, Marcella J. Kelly, Michel T. Kohl, Stephanie Kramer-Schadt, Miha Krofel, Andrea Krug, Kodi Jo Jaspers, Kellie M. Kuhn, Dries P. J. Kuijper, Erin K. Kuprewicz, Josip Kusak, Miroslav Kutal, Diana J. R. Lafferty, Summer LaRose, Marcus Lashley, Richard Lathrop, Thomas E. Lee, Christopher Lepczyk, Damon B. Lesmeister, Alain Licoppe, Marco Linnell, Jan Loch, Robert Long, Robert C. Lonsinger, Julie Louvrier, Matthew Scott Luskin, Paula MacKay, Sean Maher, Benoît Manet, Gareth K. H. Mann, Andrew J. Marshall, David Mason, Zara McDonald, Tracy McKay, William J. McShea, Matt Mechler, Claude Miaud, Joshua J. Millspaugh, Claudio M. Monteza-Moreno, Dario Moreira-Arce, Kayleigh Mullen, Christopher Nagy, Robin Naidoo, Itai Namir, Carrie Nelson, Brian O’Neill, M. Teague O’Mara, Valentina Oberosler, Christian Osorio, Federico Ossi, Pablo Palencia, Kimberly Pearson, Luca Pedrotti, Charles E. Pekins, Mary Pendergast, Fernando F. Pinho, Radim Plhal, Melissa Price, Michael Procko, Mike D. Proctor, Emiliano Esterci Ramalho, Nathan Ranc, Slaven Reljic, Katie Remine, Michael Rentz, Ronald Revord, Rafael Reyna-Hurtado, Derek Risch, Euan G. Ritchie, Andrea Romero, Christopher Rota, Francesco Rovero, Helen Rowe, Christian Rutz, Marco Salvatori, Derek Sandow, Christopher Schalk, Xochilt Pocasangre-Orellana. 2024. Mammal responses to global changes in human activity vary by trophic group and landscape
• John Willis, Don C. Bragg, Jeffery B. Cannon, Kamal J. K. Gandhi, Kathryn R. Kidd, Adam D. Polinko, Joshua J. Puhlick, Daniel Saenz, Mary Anne Sword Sayer, Christopher Schalk, Andrew B. Self, Courtney M. Siegert, J. Morgan Varner. 2024. Assessing the potential impact of retaining native off‐site tree species in woodland restoration
• Sam M. Driver, Cord B. Eversole, Daniel R. Unger, David L. Kulhavy, Christopher Schalk, I-Kuai Hung. 2023. Assessing the impacts of climate change on the at-risk species Anaxyrus microscaphus (the Arizona toad): a local and range-wide habitat suitability analysis
• David Rosenbaum, Connor S. Adams, Daniel Saenz, Christopher Schalk. 2023. Supramarginal scute count of alligator snapping turtles (Macrochelys temminckii) in Texas, USA
• David Rosenbaum, D. Craig Rudolph, Daniel Saenz, Lee A. Fitzgerald, Ryan E. Nelson, Christopher S. Collins, Toby J. Hibbitts, Ricky W. Maxey, Paul Crump, Christopher Schalk. 2023. Distribution and demography of the alligator snapping turtle (Macrochelys temminckii) in Texas: a 20-year perspective
• David Rosenbaum, Daniel Saenz, Carmen G. Montaña, Yanli Zhang, Christopher Schalk. 2023. Detection, occupancy, and abundance of the alligator snapping turtle in Texas
• Christopher Schalk, Yuhui H. Weng, Connor S. Adams, Daniel Saenz. 2022. Spatiotemporal patterns of snake captures and activity in upland pine forests

• Center or Group
  

  Southern Pine Ecology and Management (SRS-4159)

  https://research.fs.usda.gov/srs/centers/southern-pine
  Station

  Southern Research Station

• Texas A&M University, Phd, Wildlife and Fisheries Sciences, 2016
• SUNY College of Environmental Science and Forestry, B. S., Environmental Science, 2008