Skip to page content
Return to Top


T.Wayne Schwertner

T. Wayne Schwertner is an Assistant Professor and Head for WSES at Tarleton and is a research wildlife biologist with Texas A&M AgriLife Research. He has extensive experience conducting research related to the management of game bird populations, including doves. Prior to coming to Tarleton, Dr. Schwertner had a twelve-year career with the Texas Parks and Wildlife Department, including duties as the Statewide White-winged Dove Program Leader. During this time, he played a key role in implementing Texas's first statewide white-winged dove survey, as well as the ongoing white-winged dove banding project. Dr. Schwertner has experience in modeling population dynamics and habitat relationships for a number of vertebrate species.

Barry Lambert

Barry Lambert is Associate Professor for WSES at Tarleton. He also serves as the Dean for the College of Graduate Studies, Associate Vice President of Research, and as a principle investigator through Texas A&M AgriLife Research. Dr. Lambert's research interests include animal nutrition, nutrient management, and condensed tannins in forage or browse plants. He also collaborates with researchers from various disciplines to refine and implement strategies to reduce nutrient pollution from animal feeding operations.

Jeff Breeden

Jeff Breeden is an Associate Professor in WSES at Tarleton. While an undergraduate, he was an intern in the Lower Rio Grande Valley at the Las Palomas Wildlife Management area for three summers assisting with management of white-winged dove. In addition, both his masters and doctoral research focused on Columbids. He has experience in habitat evaluation, abundance estimation, productivity, behavior, trapping, and radio tracking doves and pigeons. His current research focus includes the evaluation of habitat quality for threatened ungulate populations at Fossil Rim Wildlife Center. He teaches the introductory GIS course at Tarleton.

David Kattes

David Kattes is a Professor in WSES at Tarleton. He also serves as a Research Entomologist for Texas A&M AgriLife Research. Dr. Kattes is engaged in both agronomy and entomology. His recent accomplishments include the publication of Insects of Texas: A Practical Guide. His work is supported by USDA-APHIS contracts and he mentors both undergraduate and graduate researchers. He has developed unique collection and trapping methods for novel insects and he collaborates with Fossil Rim Wildlife Center on projects involving pest of diverse ungulate populations. Research interests include the biology, ecology, and management of arthropods of veterinary and wildlife importance. His group is currently studying various secondary plant compounds for potential low-impact management of filth flies. Dr. Kattes also has interests in the utilization of various legume, forb, and grass mixtures as livestock and wildlife forage.

Donald McGahan

Donald McGahan, Assistant Professor and Research Scientist with Tarleton and Texas A&M AgriLife Research, is a soil scientist/biogeochemist interested in identifying systematic variation in soils and their impacts on management. His research examines the slowly renewable natural resource, soil, on which the majority of life planet depend. He uses multiple low and high technology tools to investigate hows and whys to further understanding this diverse ecosystem. Knowledge of soil "in the environment and 'of the environment' is applicable to site-specific soil management(s) including both land use for agriculture and non-agricultural land use. Currently under investigation are phosphorus forms and contents on agricultural lands and the impacts and fates thereof as a result of both natural erosion and accelerated erosion.

Hennen Cummings

Hennen Cummings is Associate Professor at Tarleton. Dr. Cummings has evaluated experimental herbicides, insecticides, nematicides, plant growth regulators, turfgrass paints and pigments, gypsum formulations, soil wetting agents, biostimulants, microbials, traffic injury abatement systems, new turfgrass cultivars and other plant varieties, and fertilizers using estimates of quality, injury, density, and control. He has access to regional golf courses with nesting blue herons, deer, wild hogs, armadillo, and numerous passerine species for studies of urban wildlife. The Tarleton State University Turfgrass Field Laboratory has 12 species of irrigated cool and warm-season turfgrasses maintained at various mowing heights. Dr. Cummings also has experience in environmental site assessment and environmental impact mitigation.

Roger Wittie

Roger Wittie is Professor and Executive Director of Faculty Research at Tarleton. He is an ecologist focusing on reclamation and restoration ecology, process diversity, and plant-herbivore interaction. His current research includes studies of plant-insect interactions, watershed protection, native plant development, and invasive species. Dr. Wittie also serves the program as a statistician and assists students with research design and data analyses. As Executive Director, he assist faculty with development of external funding requests.

James P. Muir

James P. Muir is Professor and Research Scientist with Tarleton and Texas A&M AgriLife Research. He is a grassland ecologist focusing on the plant/animal interface He has on-going research in Limpopo South Africa, Pernambuco Brazil, and throughout Texas. His students have undertaken research or presented their data in many countries, including Argentina, South Africa and Malaysia. His long-term focus has been legumes, both cultivated and natural, and their myriad roles in pastures, rangeland, prairies, and savannahs. His multi-national team is looking at the many facets of legume condensed tannins as they affect plant survival, herbivory, and carbon sequestration, as well as animal and environment health. He is also interested in domesticating native Texas legume ecotypes for many uses, including prairie restoration and roadside revegetation.

Jeff Brady

Jeff Brady is Assistant Professor and Research Scientist with Tarleton and Texas A&M AgriLife Research. His research interests focus on genomics. He currently works with next-generation sequencing to characterize microbial communities. Example studies include changing rumen microbiota following dietary modifications, characterization and tracking of fecal pollution in watersheds, effects of differing agricultural practices on microbial diversity, and microbial/pathogenic contents of tick species. Other research projects are also diverse, including the characterization of genes to improve cereal crops for use as biofuels and characterization/exploitation of pathogenic protozoa for use as biocontrol agents for imported fire ants.

Paula McKeehan

Paula McKeehan is an Assistant Professor in WSES at Tarleton. She is a Registered and Licensed Dietitian. Mrs. McKeehan has experience as an FCS AgriLife Extension agent, a clinical dietitian, and in community nutrition with Texas WIC program. Her interests include general Medical Nutrition Therapy, Community Nutrition and Nutrition Education. Her role within the department focuses on sustainable nutrition and consumer behaviors. She is passionate about food consumer education.