Increasing Rangeland Resilience and Resistance
On western lands dominated by sagebrush, large wildfires are now much more frequent and intense. Such fires pose a major threat to ranchers, local communities, and others who depend on this ecosystem for their livelihood and rural way of life. These uncharacteristic fires are often a result of the large-scale spread and dominance of nonnative invasive annual grasses. Hundreds of partners are working together to better prevent fires, improve efforts in suppression, and address the threat of invasive species. These actions benefit sage grouse and other wildlife species, as well as the communities that depend on the economic, ecological, and social values of the sagebrush ecosystem.
The Fire-Invasive Cycle
Historically, fires in sagebrush country varied due to topography, fuel abundance and continuity, and soil type. Fire occurred every several decades in colder, wetter sagebrush lands at higher elevations and every few hundred years in the hotter, dryer lower elevations.
Contemporary fire cycles have substantially changed from these historic trends. The hotter-dryer lower elevations are experiencing much more frequent fire intervals that don’t allow the landscape time to recover. This is primarily due to the fire’s interaction with nonnative invasive grasses (like cheatgrass) that dry out early in the season, which causes them to burn faster, hotter, and larger in size. Some areas experience “reburns” every 7 to 15 years. Fire cycles for the colder-moister sagebrush lands shifted towards smaller and less frequent fires due to effective fire suppression efforts and other human activities.
Putting Science into Practice
Across the western sagebrush range, planning and prioritization efforts were and are continuing to be developed to address these ongoing threats. One such effort created the Science Framework for Conservation and Restoration of the Sagebrush Biome (Part 1 and Part 2). This has provided the information needed to assist managers in prioritizing and planning on-the-ground restoration and mitigation actions across the sagebrush biome.
Another team comprised of plant ecologists, wildlife biologists, fire specialists, and land managers was organized by the Western Association of Fish and Wildlife Agencies. The team’s goal was to develop a strategic approach using resilience and resistance concepts to identify places at lowest and highest risk of sagebrush ecosystem loss due to spread of invasives and wildfire.
In simple terms, “resilience” is the ability of the land to return to its previous state after a disturbance like wildfire. The term “resistance” is the capability of a system to withstand change and retain its natural character.
This team developed a framework called the Fire and Invasives Assessment Tool (FIAT) to assess the major threats to the sagebrush ecosystem to conserve sage grouse and its habitat. The framework provides a matrix (show graphic of matrix) used to prioritize planning efforts based on Greater Sage-grouse breeding bird densities and level of sagebrush rangelands resilience and resistance. The BLM used this framework and matrix to develop a prioritization of their planning efforts for land treatments that address the spread of invasives and threat from wildfire in the Great Basin. Key to the restoration and rehabilitation efforts on lands damaged by rangeland fires, invasive species, severe storms, and drought is the National Seed Strategy.
The Sagebrush Rangeland Partnership is supporting opportunities to address fire and invasives, both before and after fires occur. Mitigation and restoration efforts are essential in stemming the loss of sagebrush habitat. Through our partnership's capacity-building model, we are teaming with local partners to help them deliver on the ground conservation where needed most.
Management Tools and Success Stories
- Spotlight -
RAP Training Webinar
In this webinar participants will learn about the Rangeland Analysis Platform (RAP) – a new free, online tool that helps landowners and natural resource managers track vegetation through time and plan actions to improve America’s grazing lands. The RAP is a free, online tool that helps landowners and natural resource managers track vegetation through time and plan actions to improve America’s grazing lands. The RAP can be used to provide strategies to improve productivity of grazing lands, manage weeds, mitigate impacts of wildfire and drought, and benefit wildlife habitats.
Relevant Science on Fire & Invasives
Operationalizing Resilience and Resistance Concepts to Address Invasive Grass-Fire Cycles by Jeanne Chambers, et al. 2019
Repeated fires reduce plant diversity in low‐elevation Wyoming big sagebrush ecosystems (1984–2014) by Adam Mahood, et al. 2019