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Keyword: cheatgrass

Long-term effects of tree expansion and reduction on soil climate in a semiarid ecosystem

Publications Posted on: September 29, 2020
In sagebrush ecosystems, pinyon and juniper tree expansion reduces water available to perennial shrubs and herbs. We measured soil water matric potential and temperatures at 13-30 and 50-65 cm soil depths in untreated and treated plots across a range of environmental conditions. We sought to determine the effects of tree expansion, tree reduction treatments, and expansion phase at time of treatment over 12-13 yr post-treatment.

Seed Mix Matters! Webinar Transcript and Slides - May 20, 2020

Documents and Media Posted on: May 20, 2020
Transcript and slides for the May 20, 2020 webinar featuring Francis Kilkenny and Jeffrey Ott.  Document Type: Other Documents

Seed mix matters!

Events Posted on: May 04, 2020
On May 20, 2020, RMRS Research Biologists Francis Kilkenny and Jeffrey Ott discussed restoration with native plants.

The west-wide fuelcasting system

Events Posted on: April 27, 2020
Fuelcasting is a new program that provides projections of expected fuel conditions this grazing season. It is an important component of the Rangeland Production Monitoring System. During the webinar, RMRS scientist Matt Reeves provided an overview of the system, demonstrated how to download and use the data, and discussed the 2020 fuel outlook with a focus on hotspots. 

Post-fire native species seed mixes are effective at keeping out cheatgrass in the Great Basin

Documents and Media Posted on: April 02, 2020
Seeding an area after a fire has long been used to control erosion and suppress problem invasive grasses like cheatgrass. But for managers, choosing the right seed mix to use can be tricky. Document Type: Other Documents

Low temperature during infection limits Ustilago bullata (Ustilaginaceae, Ustilaginales) disease incidence on Bromus tectorum (Poaceae, Cyperales)

Publications Posted on: February 27, 2020
Ustilago bullata is frequently encountered on the exotic winter annual grass Bromus tectorum in western North America. To evaluate the biocontrol potential of this seedling-infecting pathogen, we examined the effect of temperature on the infection process. Teliospore germination rate increased linearly with temperature from 2.5 to 25°C, with significant among-population differences.

Disturbance type and sagebrush community type affect plant community structure after shrub reduction

Publications Posted on: October 02, 2019
Treatments to reduce shrub cover are commonly implemented with the objective of shifting community structure away from shrub dominance and toward shrub and perennial grass codominance. In sagebrush (Artemisia L.) ecosystems, shrub reduction treatments have had variable effects on target shrubs, herbaceous perennials, and non-native annual plants. The factors mediating this variability are not well understood.

Climate-driven shifts in soil temperature and moisture regimes suggest opportunities to enhance assessments of dryland resilience and resistance

Publications Posted on: October 02, 2019
Assessing landscape patterns in climate vulnerability, as well as resilience and resistance to drought, disturbance, and invasive species, requires appropriate metrics of relevant environmental conditions.

Using our understanding of resilience to disturbance and resistance to invasive annual grasses to target management actions in the sagebrush biome

Projects Posted on: July 30, 2019
The concepts of ecological resilience and resistance to invasive annual grasses have been used to develop an understanding of sagebrush ecosystem response to disturbances like wildfire and management actions to reduce fuels and restore native ecosystems. A multi-scale framework that uses these concepts to prioritize areas for conservation and restoration at landscape scales and to determine effective management strategies at local scales has been developed by Chambers and her colleagues. Regional SageSTEP (Sagebrush Treatment Evaluation Project) data coupled with west-wide AIM (Assessment, Inventory and Monitoring) data provide a unique opportunity to refine the predictors of resilience and resistance and extend the existing multi-scale framework effort.

Landscape and organismal factors affecting sagebrush-seedling transplant survival after megafire restoration

Publications Posted on: July 25, 2019
Larger and more frequent disturbances are motivating efforts to accelerate recovery of foundational perennial species by focusing efforts into establishing island patches to sustain keystone species and facilitate recovery of the surrounding plant community.