selected publications academic article Wonkka, C. L., Twidwell, D., West, J. B., & Rogers, W. E. (2016). Shrubland resilience varies across soil types: implications for operationalizing resilience in ecological restoration. ECOLOGICAL APPLICATIONS. 26(1), 128-145. Ra, M. A., Nijjer, S., Johnson, A., Rogers, W. E., & Siemann, E. (2008). Experimental approaches to test allelopathy: A case study using the invader Sapium sebiferum. Allelopathy Journal. 22(1), 1-13. Nijjer, S., Lankau, R. A., Rogers, W. E., & Siemann, E. (2002). Effects of temperature and light on Chinese tallow (Sapium sebiferum) and Texas sugarberry (Celtis laevigata) seed germination. Texas Journal of Science. 54(1), 63-68. Siemann, E., DeWalt, S. J., Zou, J., & Rogers, W. E. An experimental test of the EICA Hypothesis in multiple ranges: invasive populations outperform those from the native range independent of insect herbivore suppression. AoB PLANTS. 9(1), plw087-plw087. Siemann, E., & Rogers, W. E. Changes in light and nitrogen availability under pioneer trees may indirectly facilitate tree invasions of grasslands. Journal of Ecology. 91(6), 923-931. Twidwell, D., Wonkka, C. L., Wang, H., Grant, W. E., Allen, C. R., Fuhlendorf, S. D., ... Rogers, W. E. Coerced resilience in fire management. JOURNAL OF ENVIRONMENTAL MANAGEMENT. 240, 368-373. Hartley, M. K., Rogers, W. E., & Siemann, E. Comparisons of arthropod assemblages on an invasive and native trees: abundance, diversity and damage. Arthropod-Plant Interactions. 4(4), 237-245. Lankau, R. A., Rogers, W. E., & Siemann, E. Constraints on the utilisation of the invasive Chinese tallow tree Sapium sebiferum by generalist native herbivores in coastal prairies. Ecological Entomology. 29(1), 66-75. ROGERS, W. E., SIEMANN, E., & LANKAU, R. A. Damage Induced Production of Extrafloral Nectaries in Native and Invasive Seedlings of Chinese Tallow Tree (Sapium sebiferum). American Midland Naturalist. 149(2), 413-417. Zou, J., Siemann, E., Rogers, W. E., & DeWalt, S. J. Decreased resistance and increased tolerance to native herbivores of the invasive plant Sapium sebiferum. Ecography. 31(5), 663-671. Park, I., DeWalt, S. J., Siemann, E., & Rogers, W. E. Differences in cold hardiness between introduced populations of an invasive tree. Biological Invasions. 14(10), 2029-2038. ZOU, J., ROGERS, W. E., & SIEMANN, E. Differences in morphological and physiological traits between native and invasive populations of Sapium sebiferum. Functional Ecology. 21(4), 721-730. Twidwell, D., Wonkka, C. L., Taylor, C., Zou, C. B., Twidwell, J. J., & Rogers, W. E. Drought-induced woody plant mortality in an encroached semi-arid savanna depends on topoedaphic factors and land management. Applied Vegetation Science. 17(1), 42-52. ROGERS, W. E., HARTNETT, D. C., & ELDER, B. Effects of Plains Pocket Gopher (Geomys bursarius) Disturbances on Tallgrass-prairie Plant Community Structure. American Midland Naturalist. 145(2), 344-357. SIEMANN, E., ROGERS, W. E., & GRACE, J. B. Effects of nutrient loading and extreme rainfall events on coastal tallgrass prairies: invasion intensity, vegetation responses, and carbon and nitrogen distribution. Global Change Biology. 13(10), 2184-2192. Rogers, W. E., & Siemann, E. Effects of simulated herbivory and resource availability on native and invasive exotic tree seedlings. Basic and Applied Ecology. 3(4), 297-307. Rogers, W. E., & Siemann, E. Effects of simulated herbivory and resources on Chinese tallow tree (Sapium sebiferum, Euphorbiaceae) invasion of native coastal prairie. AMERICAN JOURNAL OF BOTANY. 90(2), 243-249. Romaach, S. S., Seabloom, E. W., Reichman, O. J., Rogers, W. E., & Cameron, G. N. Effects of species, sex, age, and habitat on geometry of pocket gopher foraging tunnels. JOURNAL OF MAMMALOGY. 86(4), 750-756. Preiss, V. D., Wonkka, C. L., McGranahan, D. A., Lodge, A. G., Dickinson, M. B., Kavanagh, K. L., ... Rogers, W. E. Exotic herbivores and fire energy drive standing herbaceous biomass but do not alter compositional patterns in a semiarid savanna ecosystem. Applied Vegetation Science. 26(4), Siemann, E., Carrillo, J. A., Gabler, C. A., Zipp, R., & Rogers, W. E. Experimental test of the impacts of feral hogs on forest dynamics and processes in the southeastern US. Forest Ecology and Management. 258(5), 546-553. Smith, M. D., Wilkins, K. D., Holdrege, M. C., Wilfahrt, P., Collins, S. L., Knapp, A. K., ... Zuo, X. Extreme drought impacts have been underestimated in grasslands and shrublands globally. Proceedings of the National Academy of Sciences of the United States of America. 121(4), e2309881120. Twidwell, D., Rogers, W. E., Wonkka, C. L., Taylor, C., & Kreuter, U. P. Extreme prescribed fire during drought reduces survival and density of woody resprouters. Journal of Applied Ecology. 53(5), 1585-1596. Siemann, E., & Rogers, W. E. Genetic differences in growth of an invasive tree species. Ecology Letters. 4(6), 514-518. DeWalt, S. J., Siemann, E., & Rogers, W. E. Geographic distribution of genetic variation among native and introduced populations of Chinese tallow tree, Triadica sebifera (Euphorbiaceae). AMERICAN JOURNAL OF BOTANY. 98(7), 1128-1138. Wonkka, C. L., West, J. B., Twidwell, D., & Rogers, W. E. Grass Mortality and Turnover Following Core Rangeland Restoration Practices. Rangeland Ecology and Management. 70(3), 290-300. Hiers, Q. A., Treadwell, M. L., Dickinson, M. B., Kavanagh, K. L., Lodge, A. G., Starns, H. D., ... Rogers, W. E. Grass bud responses to fire in a semiarid savanna system. Ecology and Evolution. 11(11), 6620-6633. Siemann, E., & Rogers, W. E. HERBIVORY, DISEASE, RECRUITMENT LIMITATION, AND SUCCESS OF ALIEN AND NATIVE TREE SPECIES. ECOLOGY. 84(6), 1489-1505. Rogers, W. E., & Siemann, E. Herbivory tolerance and compensatory differences in native and invasive ecotypes of Chinese tallow tree (Sapium sebiferum). Plant Ecology. 181(1), 57-68. Scholtz, R., Donovan, V. M., Strydom, T., Wonkka, C., Kreuter, U. P., Rogers, W. E., ... Twidwell, D. High-intensity fire experiments to manage shrub encroachment: lessons learned in South Africa and the United States. African Journal of Range and Forage Science. 39(1), 148-159. Siemann, E., & Rogers, W. E. INCREASED COMPETITIVE ABILITY OF AN INVASIVE TREE MAY BE LIMITED BY AN INVASIVE BEETLE. ECOLOGICAL APPLICATIONS. 13(6), 1503-1507. Wang, H., Wonkka, C. L., Treglia, M. L., Grant, W. E., Smeins, F. E., & Rogers, W. E. Incorporating local-scale variables into distribution models enhances predictability for rare plant species with biological dependencies. Biodiversity and Conservation. 28(1), 171-182. Zou, J., Rogers, W. E., & Siemann, E. Increased competitive ability and herbivory tolerance in the invasive plant Sapium sebiferum. Biological Invasions. 10(3), 291-302. Wang, H., Grant, W. E., Gan, J., Rogers, W. E., Swannack, T. M., Koralewski, T. E., Miller, J. H., & Taylor, J. W. Integrating spread dynamics and economics of timber production to manage Chinese tallow invasions in southern U.S. forestlands. PLoS ONE. 7(3), e33877-e33877. Clark, M. D., Wonkka, C. L., Kreuter, U. P., & Rogers, W. E. Interactive effects of prescribed fire and livestock grazing onSeriphium plumosumin South African sour bushveld. African Journal of Range and Forage Science. 37(4), 278-285. ROGERS, W. E., & SIEMANN, E. Invasive ecotypes tolerate herbivory more effectively than native ecotypes of the Chinese tallow tree Sapium sebiferum. Journal of Applied Ecology. 41(3), 561-570. Wonkka, C. L., Rogers, W. E., & Kreuter, U. P. Legal barriers to effective ecosystem management: exploring linkages between liability, regulations, and prescribed fire. ECOLOGICAL APPLICATIONS. 25(8), 2382-2393. DEWALT, S. J., SIEMANN, E., & ROGERS, W. E. Microsatellite markers for an invasive tetraploid tree, Chinese tallow (Triadica sebifera). Molecular Ecology Resources. 6(2), 505-507. Nijjer, S., Rogers, W. E., & Siemann, E. Negative plant-soil feedbacks may limit persistence of an invasive tree due to rapid accumulation of soil pathogens. Proceedings of the Royal Society of London. Biological Sciences. 274(1625), 2621-2627. Zhang, L., Wang, H., Zou, J., Rogers, W. E., & Siemann, E. Non-native plant litter enhances soil carbon dioxide emissions in an invaded annual grassland. PLoS ONE. 9(3), e92301-e92301. Wonkka, C. L., Twidwell, D., Franz, T. E., Taylor, C., & Rogers, W. E. Persistence of a Severe Drought Increases Desertification but not Woody Dieback in Semiarid Savanna. Rangeland Ecology and Management. 69(6), 491-498. Bossdorf, O., Auge, H., Lafuma, L., Rogers, W. E., Siemann, E., & Prati, D. Phenotypic and genetic differentiation between native and introduced plant populations. Oecologia. 144(1), 1-11. Zou, J., Rogers, W. E., & Siemann, E. Plasticity of Sapium sebiferum seedling growth to light and water resources: Inter- and intraspecific comparisons. Basic and Applied Ecology. 10(1), 79-88. Wang, H., Wonkka, C. L., Grant, W. E., & Rogers, W. E. Potential Range Expansion of Japanese Honeysuckle (Lonicera japonica Thunb.) in Southern U.S. Forestlands. Forests. 3(3), 573-590. Wang, H., Grant, W. E., Swannack, T. M., Gan, J., Rogers, W. E., Koralewski, T. E., Miller, J. H., & Taylor, J. Predicted range expansion of Chinese tallow tree (Triadica sebifera) in forestlands of the southern United States. Diversity and Distributions: A journal of biological invasions and biodiversity. 17(3), 552-565. Twidwell, D., Rogers, W. E., McMahon, E. A., Thomas, B. R., Kreuter, U. P., & Blankenship, T. L. Prescribed Extreme Fire Effects on Richness and Invasion in Coastal Prairie. Invasive Plant Science and Management. 5(3), 330-340. Starns, H. D., Wonkka, C. L., Dickinson, M. B., Lodge, A. G., Treadwell, M. L., Kavanagh, K. L., ... Rogers, W. E. Prosopis glandulosa persistence is facilitated by differential protection of buds during low- and high-energy fires. JOURNAL OF ENVIRONMENTAL MANAGEMENT. 303, 114141-114141. Wang, H., Wonkka, C. L., Grant, W. E., & Rogers, W. E. Range expansion of invasive shrubs: implication for crown fire risk in forestlands of the southern USA. AoB PLANTS. 8, plw012. Siemann, E., Rogers, W. E., & Dewalt, S. J. Rapid adaptation of insect herbivores to an invasive plant. Proceedings of the Royal Society of London. Biological Sciences. 273(1602), 2763-2769. Siemann, E., & Rogers, W. E. Recruitment Limitation, Seedling Performance and Persistence of Exotic Tree Monocultures. Biological Invasions. 8(5), 979-991. Siemann, E., & Rogers, W. E. Reduced resistance of invasive varieties of the alien tree Sapium sebiferum to a generalist herbivore. Oecologia. 135(3), 451-457. Twidwell, D., Fuhlendorf, S. D., Taylor, C., & Rogers, W. E. Refining thresholds in coupled fire-vegetation models to improve management of encroaching woody plants in grasslands. Journal of Applied Ecology. 50(3), 603-613. HARTLEY, M. K., ROGERS, W. E., SIEMANN, E., & GRACE, J. Responses of Prairie Arthropod Communities to Fire and Fertilizer: Balancing Plant and Arthropod Conservation. American Midland Naturalist. 157(1), 92-105. Donahue, C., Rogers, W. E., & Siemann, E. Restoring an Invaded Prairie by Mulching Live Sapium sebiferum (Chinese Tallow Trees): Effects of Mulch on Sapium Seed Germination. Natural Areas Journal. 26(3), 244-253. Hannusch, H. J., Rogers, W. E., Lodge, A. G., Starns, H. D., & Tolleson, D. R. Semi-arid savanna herbaceous production and diversity responses to interactive effects of drought, nitrogen deposition, and fire. Journal of Vegetation Science. 31(2), 255-265. Wonkka, C. L., Twidwell, D., West, J. B., & Rogers, W. E. Shrubland resilience varies across soil types: implications for operationalizing resilience in ecological restoration. ECOLOGICAL APPLICATIONS. 26(1), 128-145. Brady, M. K., Dickinson, M. B., Miesel, J. R., Wonkka, C. L., Kavanagh, K. L., Lodge, A. G., ... Hanan, E. J. Soil Heating in Fire (SheFire): A model and measurement method for estimating soil heating and effects during wildland fires. ECOLOGICAL APPLICATIONS. 32(6), e2627. Wang, H., Wonkka, C. L., Treglia, M. L., Grant, W. E., Smeins, F. E., & Rogers, W. E. Species distribution modelling for conservation of an endangered endemic orchid. AoB PLANTS. 7(1), plv039. Rogers, W. E., & Hartnett, D. C. Temporal vegetation dynamics and recolonization mechanisms on different-sized soil disturbances in tallgrass prairie. AMERICAN JOURNAL OF BOTANY. 88(9), 1634-1642. Nijjer, S., Rogers, W. E., & Siemann, E. The Impacts of Fertilization on Mycorrhizal Production and Investment in Western Gulf Coast Grasslands. American Midland Naturalist. 163(1), 124-133. Zou, J., Rogers, W. E., DeWalt, S. J., & Siemann, E. The effect of Chinese tallow tree (Sapium sebiferum) ecotype on soil-plant system carbon and nitrogen processes. Oecologia. 150(2), 272-281. Nijjer, S., Rogers, W. E., Lee, C., & Siemann, E. The effects of soil biota and fertilization on the success of Sapium sebiferum. Applied Soil Ecology. 38(1), 1-11. Twidwell, D., Rogers, W. E., Fuhlendorf, S. D., Wonkka, C. L., Engle, D. M., Weir, J. R., Kreuter, U. P., & Taylor, C. The rising Great Plains fire campaign: citizens' response to woody plant encroachment. Frontiers in Ecology and the Environment. 11(s1), E64-E71. SIEMANN, E., & ROGERS, W. E. The role of soil resources in an exotic tree invasion in Texas coastal prairie. Journal of Ecology. 95(4), 689-697. Culpepper, L. Z., Wang, H., Koralewski, T. E., Grant, W. E., & Rogers, W. E. Understory upheaval: factors influencing Japanese stiltgrass invasion in forestlands of Tennessee, United States. Botanical Studies. 59(1), 20. Rogers, W. E., & Hartnett, D. C. Vegetation responses to different spatial patterns of soil disturbance in burned and unburned tallgrass prairie. Plant Ecology. 155(1), 99-109. conference paper Guenther, C., Rogers, W., Syamlal, M., Munson, C., & Ramezan, M. (2017). DOE/NETL multiphase flow science impact and benefits analysis for gasification applications and beyond Hartley, M. K., DeWalt, S., Rogers, W. E., & Siemann, E. (2004). Characterization of arthropod assemblage supported by the Chinese Tallow tree (Sapium sebiferum) in southeast Texas. Texas Journal of Science. 369-382. Donahue, C., Rogers, W. E., & Siemann, E. (2004). Effects of temperature and mulch depth on Chinese tallow tree (Sapium sebiferum) seed germination. Texas Journal of Science. 347-356. Butterfield, B. J., Rogers, W. E., & Siemann, E. (2004). Growth of Chinese tallow tree (Sapium sebiferum) and four native trees under varying water regimes. Texas Journal of Science. 335-346. Nijjer, S., Rogers, W. E., & Siemann, E. (2004). The effect of mycorrhizal inoculum on the growth of five native tree species and the invasive Chinese Tallow tree (Sapium sebiferum). Texas Journal of Science. 357-368. O'Brien, T. J., Zitney, S. E., Rogers, W., & Cugini, A. (2003). Simulation tools for the design of vision 21 energy plants. ACS Division of Fuel Chemistry, Preprints. 855-856. Shi, S., Lee, D., McSurdy, S., McMillian, M., Richardson, S., & Rogers, W. (2002). Theoretical investigation of autoignition of combustible gas mixtures in rapid compression machines. 109-121. Rogers, W. E., Nijjer, S., Smith, C. L., & Siemann, E. (2000). Effects of resources and herbivory on leaf morphology and physiology of Chinese tallow (Sapium sebiferum) tree seedlings. Texas Journal of Science. 43-56. Keay, J., Rogers, W. E., Lankau, R., & Siemann, E. (2000). The role of allelopathy in the invasion of the Chinese tallow tree (Sapium sebiferum). Texas Journal of Science. 57-64. Rabha, S. S., Panday, R., Breault, G., Gopalan, B., Tucker, J., & Rogers, W. Carbon Capture Using Amine-Impregnated Mesoporous Sorbent in Fixed and Bubbling Beds. v06at07a021-v06at07a021. Shi, S., Lee, D., McSurdy, S., McMillian, M., Richardson, S., & Rogers, W. Theoretical Investigation of Autoignition of Combustible Gas Mixtures in Rapid Compression Machines. American Society of Mechanical Engineers, Internal Combustion Engine Division (Publication) ICE. 109-121.
principal investigator on Conservation Strategies for the Protection and Propagation of the Federally Endangered Orchid, Navasota Ladies Tresses (Spiranthes parksii). awarded by Brazos Valley Economic Development Corporation - (Bryan, Texas, United States) 2019 - 2021 Pyrogenic controls on grass-shrub persistence in the Great Plains awarded by United States Department of Agriculture - (Washington D.C., District of Columbia, United States) 2017 - 2020
co-principal investigator on Enhancing Livestock Production from Rangelands in the Great Plains awarded by United States Department of Agriculture - (Washington D.C., District of Columbia, United States) 2019 - 2024
teaching activities ECCB285 Directed Studies Instructor ECCB320 Ecosystem Restor & Mgmt Instructor ECCB430 Adv Restoration Ecology Instructor ECCB484 Internship Instructor ECCB485 Directed Studies Instructor ECCB491 Research Instructor ECCB630 Advanced Restoration Ecology Instructor ECCB681 Seminar Instructor ECCB685 Directed Studies Instructor ECCB689 Sptp: Advanced Restoration Ec Instructor ECCB689 Sptp: Advanced Restoration Eco Instructor ECCB691 Research Instructor ECCB691 Research Instructor EEBL602 Population Ecology Instructor ESSM320 Ecosystem Restor & Mgmt Instructor ESSM416 Fire Ecol & Nat Resc Mgt Instructor ESSM430 Adv Restoration Ecology Instructor ESSM491 Research Instructor ESSM626 Fire & Natrl Resc Mgmt Instructor ESSM684 Professional Internship Instructor RENR400 Study Abroad Nat Res-south Afr Instructor
chaired theses and dissertations Ariza, Martha C (2013-12). Mycorrhizal Associations, Life History, and Habitat Characteristics of the Endangered Terrestrial Orchid Spiranthes parksii Correll and Sympatric Congener Spiranthes cernua: Implications for Conservation. Bruton, Richard Kyle (2014-05). The Effects of Woody Plant Management on Habitat Conditions, Plant Demography, and Transplantation Success of the Endangered Orchid Spiranthes parksii Correll. Clark, Michele Diane (2014-12). Evaluating the Interactive Effects of Seasonal Prescribed Fire and Grazing On Invasive Grass Abundance and Woody Brush Encroachment. McGinty, Joshua (2012-07). Effect of Rate and Season of Application of Aminocyclopyrachlor on the Control of Acacia Farnesiana (L.) Willd. in South Texas. Sosa, Gabriela (2011-02). Restoring a Degraded Rangeland: Using Fire and Herbivory to Control Opuntia Cacti Encroachment. Twidwell, Dirac (2012-07). From Theory to Application: Extreme Fire, Resilience, Restoration, and Education in Social-Ecological Disciplines. Wonkka, Carissa Lyn (2012-02). Large Herbivore Impacts on Demographic Characteristics and Population Dynamics of an Endangered Orchid (Spiranthes parksii Correll). Wonkka, Carissa Lyn (2014-12). Influence of Disturbance, Soils, and Socio-Economic Constraints on Restoration in Brush Encroached, Semi-Arid Texas Rangelands.
education and training Ph.D. in Biology - Ecology Emphasis, Kansas State University - (Manhattan, Kansas, United States) 1998 B.A. in Biology & Chemistry, Gustavus Adolphus College - (Saint Peter, Minnesota, United States) 1991
mailing address TEXAS A&M AGRILIFE RESEARCH Ecology and Conservation Biology Building #1537 - 534 John Kimbrough Blvd College Station, TX 77843 USA