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

Arkansas Staff Member

Dr. Caleb Roberts

profile photo: Caleb Roberts

Assistant Unit Leader
Faculty Email:
Faculty Website



  • Ph D University of Nebraska-Lincoln 2019
  • MS Texas Tech University 2015
  • BS Murray State University 2011


Dr. Roberts received graduate degrees from Texas Tech University and University of Nebraska-Lincoln, and he joined the Arkansas Cooperative Fish & Wildlife Research Unit in 2021. Dr. Roberts’ research centers on how ecological resilience across populations, communities, landscapes, and continents manifests or erodes and how resilience can be maintained through management. Geographically, Dr. Roberts research covers Arkansas, the Great Plains, and the North American continent. Taxonomically, Dr. Roberts primarily uses birds, insects, mammals, and plants in his research. Topically, his research covers invasive species management in terms of early detection and rapid response, landscape ecology, community ecology, fire ecology, examining logic behind natural resources policies, effects of climate change, and quantifying outcomes of management and restoration actions. To conduct his research, Dr. Roberts uses a variety of spatial analyses, data integration approaches, multivariate statistics, nonlinear modeling, and both Bayesian and frequentist statistical approaches. Dr. Roberts teaches two courses—Invasion Ecology and Ecosystem Monitoring and Assessment. Dr. Roberts works closely with cooperators (Arkansas Game & Fish Commission, US Fish & Wildlife Service) as well as other state and national partners (Natural Resources Conservation Service, Sage Grouse Initiative, Quail Forever, Working Lands for Wildlife).

Areas of Expertise

Biodiversity, Botany, Climate Change, Fire Ecology, Forest Ecology, GIS/Spatial Analysis, Grassland Ecology, Habitat Management, Invasive Species, Landscape Ecology, Population and Community Ecology, Remote Sensing, Resilience, Species Distribution Modeling, Species Management, Statistics and Modelling, T&E Species Management, Wetland Ecology, Wildlife Management

Taxon Groups Studied

Carnivores, Gamebirds, Invertebrates/Insects, Nongame Fish/Wildlife, Small Mammals, Songbirds, Species of Greatest Conservation Need, Ungulates, Waterfowl

Research Publications Publication Date
Twidwell, D., Wonkka, C. L., Bielski, C. H., Allen, C. R., Angeler, D. G., Drozda, J., ... & Roberts, C. P. (2018). The perpetual state of emergency that sacrifices protected areas in a changing climate. Conservation Biology, 32(4), 905-915. | Download August 2018
Roberts, C.P., Naugle, D., Allred, B.W., Donovan, V.M., Fogarty, D.T., Jones, M.O., Maestas, J.D., Olsen, A.C., Twidwell, D. New possibilities to track rangeland productivity at multiple scales and quantify conservation outcomes. Journal of Environmental Management. | Abstract September 2022
Roberts, C.P., J.W. Cain III, and R.D. Cox. 2017. Identifying ecologically-relevant scales of habitat selection: diel habitat selection in elk. Ecosphere 8: art e02013. | Download November 2017
Roberts, C.P., Allen, C.R., Angeler, D.G., Twidwell, D. Shifting avian spatial regimes in a changing climate. Nat. Clim. Chang. 9, 562–566 (2019). | Abstract | Download June 2019
Roberts, C. P., Scholtz, R., Fogarty, D. T., Twidwell, D., & Walker Jr, T. L. (2022). Large‐scale fire management restores grassland bird richness for a private lands ecoregion. Ecological Solutions and Evidence, 3(1), e12119.

| Abstract | Download
January 2022
Roberts, C. P., Donovan, V. M., Wonkka, C. L., Powell, L. A., Allen, C. R., Angeler, D. G., Wedin, D. A., & Twidwell, D. (2019). Fire legacies in eastern ponderosa pine forests. Ecology and evolution, 9(4), 1869-1879. | Abstract | Download December 2019
Roberts CP, Uden DR, Allen CR, Angeler DG, Powell LA, Allred BW, Jones MO, Maestas JD, Twidwell D. 2022. Tracking spatial regimes in animal communities: implications for resilience-based management. Ecological Indicators.

| Abstract | Download
January 2022
Donovan, V. M., Roberts, C. P., Wonkka, C. L., Beck, J. L., Popp, J. N., Allen, C. R., & Twidwell, D. (2020). Range-wide monitoring of population trends for Rocky Mountain bighorn sheep. Biological Conservation, 248, 108639. | Abstract | Download August 2020
DeGregorio, B.A., C. Gale, E. Lassiter, A. Massey, C. Roberts, and J. Veon. 2021. Nine-banded Armadillo (Dasyrus novemcinctus) Activity Patterns are Influenced by Human Activity. Ecology and Evolution: 0-8. | Abstract | Download November 2021
Chuang, W.C., A. Garmestani, T.N. Eason, T.L. Spanbauer, H.B. Fried-Petersen, C.P. Roberts, S.M. Sundstrom, J.L. Burnett, D.G. Angeler, B.C. Chaffin, L. Gunderson, D. Twidwell and C.R. Allen. Quantitative approaches for assessing ecological and community resilience. Journal of Environmental Management 213: 353-362. July 2018
Caleb P. Roberts, Daniel R. Uden, Craig R. Allen, Dirac Twidwell. 2018. Doublethink & double standards: mismatch between policy and ecology of a native invader. PLoS ONE 13(3):eo189733.
| Download
July 2018
Burnett, J.L., C.P. Roberts, C.R. Allen, M.B. Brown, and M.P. Moulton. 2017. Dynamics of range expansion by Passer montanus in North America. Biological Invasions 19: 5-9. August 2017
Marshall, Percival

Schmit, Jessica

Presentations Presentation Date
Victoria M. Donovan; Caleb P. Roberts; Emma Keele; Dillon T. Fogarty; David A. Wedin; Dirac Twidwell. 2022. Enhancing forest stand resilience using targeted grazing and mechanical thinning in eastern ponderosa pine forest. North American Forest Ecology Workshop. Virtual meeting.<br><br><br> June 2022
Victoria M. Donovan, Jeffrey L. Beck, Carissa L. Wonkka, Caleb P. Roberts, Craig R. Allen, Dirac Twidwell. 2022. Divergent population parameters signal losses in resilience driven by global change drivers in pronghorn, an iconic rangeland species. Society for Range Management Conference. Albuquerque, NM.<br><br><br> February 2022
Shaw, M.S., Roberts, C., and B.A. DeGregorio. 2022. A Habitat Suitability Model for the Plains Spotted Skunk. The Wildlife Society Annual Conference, Spokane, WA. November 2022
Schmit JM, Fournier AMV, Roberts CP, Rowe K. Breeding and Migration Ecology and Distribution and Abundance of Arkansas King Rails. Waterbirds Society Annual Meeting. Corpus Christi, TX. 2022.<br><br> November 2022
Sarah Nodskov, Caleb Roberts, Victoria Donovan, Emma Keele, Dirac Twidwell, Craig Allen, Larkin Powell, Dave Wedin, David Angeler. Influences of Mixed Severity and Time since Fire on Diversity in Ponderosa Habitats. Midwest Fish and Wildlife Conference, Lincoln, NE. February 2017
Roberts, CP, CR Allen, DG Angeler, JL Burnett, and D Twidwell. Quantifying long-term, continental-scale changes in ecological resilience. Resilience 2017, Stockholm, Sweden, August 20-23, 2017. August 2017
Roberts, CP, CR Allen, DG Angeler, JL Burnett, and D Twidwell. Metrics for quantifying ecological resilience. Ecological Society of America 2017, Portland, OR, August, 6-11, 2017. August 2017
Marshall PM, Roberts CP, Willson JD, Mortense J. 2022. A Systematic Review of the Impacts and Influences of Invasive Waterfowl on North America. Arkansas Chapter of The Wildlife Society. March 2022
Marshall P, Willson JD, Mortensen J, Roberts CP. 2022. <b>A Systematic Review of the Impacts and Influences of Invasive Waterfowl on North America</b>. The Wildlife Society National Conference. Spokane, WA. November 2022
Jessica Burnett, Caleb Roberts, Craig Allen, David Angeler, Tarsha Eason, Dirac Twidwell. Detecting Broad-scale Spatial Regime Shifts Using Information Theory. Resilience 2017, Stockholm, Sweden, Aug 20-23 2017. August 2017
Dawson A, Roberts CP. 2022. King Rail habitat selection in Southeast Arkansas. Arkansas Water Resources Center Annual Meeting 2022. Fayetteville, AR.<br><br> July 2022
Caleb P. Roberts, Dirac Twidwell,<sup> </sup>Brady W. Allred, Victoria M. Donovan, Dillon T. Fogarty, Matthew O. Jones, Jeremy Maestas, David Naugle, Andrew C. Olsen. 2021. New possibilities for large-scale tracking of management outcomes in rangelands. Society for Range Management Annual Conference [Virtual Meeting]. February 2021
Caleb P. Roberts, Dirac Twidwell, Jessica L. Burnett, Craig R. Allen, David G. Angeler. Monitoring for future uncertainty. NE Legacy Conference, Nebraska City. October 2017
Caleb P. Roberts, Craig R. Allen, Brady Allred, David G. Angeler, Victoria M. Donovan, Brandon Edwards, David Naugle, Rheinhardt Scholtz, Jason Tack, Dirac Twidwell, Daniel R. Uden. 2022. What happens when biomes collapse, move, or contract? The Wildlife Society Conference. Spokane, WA, USA. November 2022
Burnett, J.L., C.R. Allen, D.G. Angler, C. Roberts, D. Tidwell, and A Tyre. 2016. Detecting regime shifts in space and time using the Breeding Bird Survey. The North American Ornithological Congress Vi, Washington, D.C. August 2016
Technical Publications Publication Date
Cain, J.W. III, T. Roerick, and C. Roberts. 2015. Southwest Jemez Mountains Collaborative Forest Landscape Restoration Project: Summary of work 2012-2015 for the Large Mammal Monitoring Program. Progress report to the U.S. Forest Service and National Park Service. September 2015