This amazing class at TAMU RWFM is focused on Communicating Natural Resources. It covers principles for effectively sharing natural resource science with diverse stakeholders, building essential skills for careers in rangeland, wildlife, and fisheries management. Topics include audience analysis, mixed-media presentations, and interpersonal communication tailored to natural resource contexts. Check out 2025 spring semester’s capstone project!
A new(er) peer-reviewed study published in the Journal of Environmental Management (Starns et al., 2022) provides some of the strongest experimental evidence to date that fire intensity—not just the presence of fire—is the critical factor in achieving meaningful mortality of honey mesquite (Prosopis glandulosa).
For decades, land managers in Texas, Oklahoma, and across the southern Great Plains have observed that typical “safe” prescribed fires top-kill mesquite but rarely kill it. The plant simply resprouts vigorously from protected buds beneath the bark (epicormic) and at the root crown (basal). This resilience has made prescribed fire alone an unreliable tool for restoring grass-dominated rangeland once mesquite has become dominant.
The 2022 study directly tested whether dramatically increasing fire energy could overcome those protective mechanisms—even without the added stress of severe drought.
In short, the study confirms what many experienced burn practitioners have long suspected: when the goal is mesquite control rather than simple top-kill, hotter is unequivocally better.
Citation: Starns, H.D., Wonkka, C.L., Dickinson, M.B., et al. 2022. Prosopis glandulosa persistence is facilitated by differential protection of buds during low- and high-energy fires. Journal of Environmental Management 303: 114141. https://doi.org/10.1016/j.jenvman.2021.114141. Feel free to download a pdf file here!
Safe, effective, and sufficiently intense prescribed fire can be a game-changing tool for restoring grass dominance in mesquite-invaded rangelands. This research gives us the science to justify turning up the heat!!
A recent study from Texas A&M researchers, published in Landscape Ecology, dives into how prescribed fires impact plant diversity in mesquite-oak savannas like those on the Edwards Plateau. By analyzing data from over 288 plots before and after a prescribed fire, the team found that these fires boost local plant diversity, encouraging more species richness and evenness in burned areas. This is especially true in soils with better water-holding capacity, where post-fire regrowth thrives amid the mosaic of burned and unburned patches. But there’s a flip side: fires can reduce beta-diversity, meaning less variation in plant communities across your land, as similar species start dominating post-burn.
The study highlights how soil types and rainfall play starring roles in these outcomes. In areas with deeper, moisture-retaining soils like Kavett silty clay, fires sparked significant gains in forb and grass diversity, helping control woody encroachment from mesquite and juniper while creating prime grazing spots. However, in shallower, drier soils like Tarrant, the effects were muted, underscoring the need to time burns with wetter periods to avoid stressing your vegetation. Precipitation patterns around the 2019 burns, drier than average, further mediated results, showing that fire heterogeneity (those patchy burns) shapes spatial diversity patterns, ultimately supporting a more resilient ecosystem for livestock and wildlife alike.
For ranchers looking to implement pyric-herbivory, combining fire with grazing, this research is a game-changer!! It suggests strategic burns can sustain biodiversity, improve forage quality, and maintain ecosystem services without homogenizing your landscape. Start by mapping your soil types and monitoring rainfall forecasts to maximize benefits. While the study focused on semi-arid savannas, its insights encourage adaptive management: test small-scale burns, observe plant responses, and adjust for your ranch’s unique conditions. In the end, embracing fire thoughtfully could ignite long-term health for your rangeland, turning potential threats into thriving, diverse, opportunities!
For more information on the study led by Jaime Xavier as part of The Prairie Project, please click here!
Across the Great Plains and Texas rangelands, woody plant encroachment continues to challenge grassland health and productivity. A brand new study from Trejo-Perez et al. (2025) offers important insight into why some rangeland reseeding efforts fall short and what it really takes to keep trees and shrubs from taking over.
Mesquite (Prosopis spp.) is a tough, invasive shrub that plagues rangelands across Texas and beyond, outcompeting native grasses, reducing forage for livestock, and altering wildlife habitats. For ranchers aiming to boost grazing productivity, conservationists focused on restoring biodiversity, and wildlife managers enhancing quail or deer cover, effective mesquite management is key. But timing your herbicide applications, especially foliar sprays, can make all the difference. Drawing from a ten-year dataset spanning counties like Hamilton, Jack, Hood, Eastland, Comanche, Tom Green, and Schleicher, let’s explore how environmental factors like soil temperature influence mesquite mortality rates one and two years after treatment (YAT).
Insights from the Field Trials
This dataset compiled over 500 observations across 10 years from individual plant treatment (IPT), from 5 Texas counties, tracking percent mortality alongside variables such as soil temperature (12-inch depth), air temperature, and relative humidity. While individual results varied by site and conditions, clear patterns emerge when we aggregate the data.
Practical Tips for Your Operation
By syncing sprays with healthy trees and peak growth, you can achieve higher kill rates, saving time and resources while promoting healthier rangelands. Whether you’re running cattle, promoting biodiversity, or managing for open-spaces, data-driven timing turns mesquite from foe to forgotten!! Happy spraying and spray for the tree!
*These data are currently being drafted for submission to Rangeland Ecology and Management.
Rangelands, vast and vital, are more than just scenic landscapes. They’re complex ecosystems providing essential services, from clean air and water to livestock grazing and wildlife habitat. But these valuable areas face a growing threat: woody plant encroachment. This occurs when shrubs and trees increase in density and coverage, often at the expense of grasslands. While it might seem like a simple change in vegetation, the consequences are far-reaching, impacting everything from soil health to water availability.
[Read more…] about Structural Changes Drive Functional Changes
Ranchers in West Texas frequently encounter a double-decker challenge with intense canopy coverage from honey mesquite and dense pricklypear in the understory. Synergistic broadcast herbicide applications are commonly employed to tackle these layered problematic, opportunistic, and abundant species. However, it is crucial to recognize the potential for unintended consequences on nontarget woody plant species. A recent study delved into the effects of various herbicide treatments on both target and nontarget woody plant species.
[Read more…] about Non-Target Woody Plant Response to Herbicides
The Euro-Mediterranean region is a high fire prone area with 48,000 fires reported annually. The fires are the result of landscape fuel build up which has been driven by absentee land ownership, wildfire suppression policies, extreme temperatures, and extended droughts that simultaneously occur. This study used the LANDIS-II forest landscape model which is considered a fire-smart management tool. Fire-smart management is based on controlling fire regimes through landscape interventions to reduce hazardous fuels and foster fire-resistant/resilient landscapes. The study included assessing how alternative fire management strategies affect future landscape dynamics, the fire regulation capacity, and fire regimes under long-term absentee land ownership and extreme climate scenarios.
[Read more…] about Portugal Wildfires and What Does That Have to do With Texas?
Extreme climate swings, lengthened fire seasons, drought, floods, overgrazing, fragmentation, land-use change, urbanization, and altered disturbance regimes has created an increase in woody plants, commonly referred to as woody plant encroachment or (WPE). Woody encroachment has become a global phenomenon in nearly all grassland ecosystems. We have seen the devastating results of WPE in Texas grasslands and savannas and as we learn from our North Central partners (CO, KS, MT, ND, NE, SD, and WY) many of these states are on a similar trajectory of plant community transition. Through the work of the North Central Climate Adaptation Science Center and the Rangeland Analysis Platform, other states can learn from our Texas lessons of WPE and aim for fire return intervals that minimize initial spread of woody species in grasslands.
[Read more…] about Woody Plant Encroachment – What other states are doing and saying
In the western portion of the southern Great Plains, grasslands are defined as “southern mixed”, with warm season or C4 mid-grasses being dominant and cool season or C3 short-grasses in less frequent densities. As woody plant encroachment increasingly dominates, the productive warm season C4 grasses begin to decline with less abundance on the landscape and even less productivity. Woody plant dominance also reduces plant diversity eroding heterogeneity in the mixed-grass prairie. Recently, researchers measured the effects of various combinations of spring clipping (mimicked cattle grazing) and prescribed fire treatments over an 8 year period on Texas wintergrass and buffalograss with the overall objective of reducing Texas wintergrass abundance and increasing warm season C4 mid-grass species and diversity.