Restoration
View article.
This study tested the stress-gradient hypothesis (SGH) in observations of 75 sites along overlapping water and heat stress and disturbance gradients. As stress-disturbance levels increase, sagebrush-herbaceous plant facilitation levels increase, the landscape will become increasingly aggregated as a product of necessary facilitation between sagebrush and herbaceous plants. This aggregation decreases the individual resilience of the native herbaceous plants, increases the competition from invasive plants, and decreases the overall stability and resilience of the sagebrush steppe ecosystem.
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This study found that early seral natives generally outperformed late seral natives when growing with exotics and had earlier emergence timing, although results differed among functional groups and soil types. Survival probabilities, however, did not differ between the early and late seral mixes when growing without exotics. Within each seed mix, native grasses exhibited the highest emergence probabilities of the functional groups. Natives did not suppress exotics in early life stages. Performance of B. tectorum was higher on sandy loam, while T. caput-medusae was highly successful in both soil types. Performance of native functional groups differed by soil type when growing with exotics but did not differ when growing without exotics. Survival of native grasses, in particular, was generally higher on sandy loam when growing with exotics.
View report.
This final report includes actions to be implemented by Interior’s bureaus to immediately address the threat of rangeland fire and other disturbances to Western sagebrush-steppe landscapes and improve fire and fuels management efforts.
View research brief.
This research brief summarizes a series of interviews with land managers who make decisions about post-fire rehabilitation and restoration. These interviews explored barriers to improving post-fire recovery that included: policies and funding cycles that constrain managers’ ability to monitor and re-treat effectively, pressure and legal action from interest groups, pressure from concerned public/neighbors, climate change, and
ecological debates such as native vs. non-native species use. These identified barriers provide a social-political-ecological framework that may influence on-the-ground manager decisions after wildfires in the Great Basin.
View guide.
In this study, researchers modeled the climatic envelope for subspecies wyomingensis for contemporary and future climates (decade 2050). Comparison of the contemporary and decade 2050 models shows a predicted 39% loss of suitable climate. Much of this loss will occur in the Great Basin where impacts from increasing fire frequency and encroaching weeds have been eroding the A. tridentata landscape dominance and ecological functions. The goal of this study is to provide a management tool to promote successful restoration by predicting the geographic areas where climate is suitable for this subspecies.
View report.
The initial report includes actions to be implemented by Interior’s bureaus to immediately address the threat of rangeland fire to Western sagebrush-steppe landscapes and improve fire management efforts before the start of the 2015 wildfire season.
View research brief.
This research brief summarizes research that found seed harvester ants, along with small mammals, could have a large impact on reseeding
efforts after a fire. But the populations over time are not well known. The number of ants in burned areas is significantly greater than unburned areas, but this may be an initial, short-lived response.
View the Order.
This Order sets forth enhanced policies and strategies for preventing and
suppressing rangeland fire and for restoring sagebrush landscapes impacted by fire across the West. These actions are essential for conserving habitat for the greater sage-grouse as well as other
wildlife species and economic activity, such as ranching and recreation, associated with the sagebrush-steppe ecosystem in the Great Basin region.
View field guide.
This field guide identifies seven primary components that largely determine resilience to disturbance, as well as resistance to invasive grasses and plant succession following treatment of areas of concern. An evaluation score sheet is included for rating resilience to disturbance and resistance to invasive annual grasses and the probability of seeding success.
View memorandum.
This presidential memorandum outlines federal efforts and steps to reverse pollinator losses and help restore populations to healthy levels. The steps include the development of new public-private partnerships and increased citizen engagement.