Research and Publications

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Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming basins

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This book adds to current knowledge about the regional status of the sagebrush ecosystem, the distribution of habitats, the threats to the ecosystem, and the influence of threats and habitat conditions on occurrence and abundance of sagebrush associated fauna and flora in the Wyoming Basins. As federal management agencies move toward management at regional scales through efforts such as U.S. Bureau of Land Management Rapid Ecoregional Assessments and U.S. Department of Interior Landscape Conservation Cooperatives, our ecoregional assessment approach and results for the Wyoming Basins can further advance a cohesive approach to management of the sagebrush ecosystem.

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Wildland fire risk reduction – Government Accountability Office Report

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This report examines federal officials’ and stakeholders’ views on (1) factors that affect federal-nonfederal collaboration aimed at reducing wildland fire risk to communities and (2) actions that could improve their ability to reduce risk to communities.

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Effects of climate change on snowpack and fire potential in the western USA

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This study evaluates the implications of ten twenty-first century climate scenarios for snow, soil moisture, and fuel moisture across the conterminous western USA. A decline in mountain snowpack, an advance in the timing of spring melt, and a reduction in snow season are projected for five mountain ranges in the region. The accelerated depletion of mountain snowpack due to warming leads to reduced summer soil moisture across mountain environments. Similarly, warmer and drier summers lead to decreases of up to 25% in dead fuel moisture across all mountain ranges. Collective declines in spring mountain snowpack, summer soil moisture, and fuel moisture across western mountain ranges will increase fire potential in flammability-limited forested systems where fuels are not limiting.

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The effects of thinning and burning on understory vegetation in North America: A meta-analysis

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This meta-analysis was conducted to determine if there were consistent responses of understory vegetation to fire and thinning treatments in North American forests that historically experienced frequent surface fire regimes (<20 year fire-return interval, FRI). The most consistent effect of the treatments was the increase in non-native species following mechanical thinning and reduction in shrub cover following a burn. These differences suggest the two treatments may not be surrogates in the short-term (less than 5 years). Prescribed fire and thinning treatments can be used successfully to restore understory species richness and cover, but they can create different conditions and these potentially different outcomes need to be considered in the planning of a fuels reduction treatment.

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Fall and spring grazing influence fire ignitability and initial spread in shrub steppe communities

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This study investigated effects of fall grazing, spring grazing and not grazing on fuel characteristics, fire ignition and initial spread during the wildfire season (July and August) at five shrub steppe sites in Oregon, USA. Both grazing treatments decreased fine fuel biomass, cover and height, and increased fuel moisture, and thereby decreased ignition and initial spread compared with the ungrazed treatment. However, the probability of initial spread was 6-fold greater in the fall-grazed compared with the spring-grazed treatment in August. This suggests that spring grazing may have a greater effect on fires than fall grazing, likely because fall grazing does not influence the current year’s plant growth.

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Plant community response to prescribed fire varies by pre-fire condition and season of burn in mountain big sagebrush ecosystems

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This study compared spring and fall prescribed fires at three sites (native-dominated, Bromus tectorum-dominated, and Juniperus occidentalis-dominated). There were higher plant survival rates following fall fires and native-dominated sites than in spring burns or where exotics dominated. These results show that burn season and prefire condition are important considerations when evaluating management alternatives in Artemisia tridentata ssp. vaseyana ecosystems.

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Climate Change Quarterly – Spring 2017

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Abstracts of recent papers on climate change and land management in the West, prepared by Louisa Evers, Science Liaison and Climate Change Coordinator, BLM, OR-WA State Office.

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Evaluating prescribed fire effectiveness using permanent plot monitoring data: A case study

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This study analyzed existing permanent monitoring plot data collected between 1995 and 2010 to assess achievement of management objectives related to prescribed fire in ponderosa pine forests. Following first entry fire, ponderosa pine (Pinus ponderosa var. scopulorum) and Gambel oak (Quercus gambelii) overstory and midstory densities declined between 10% and 45% and effectively shifted the Gambel oak diameter distribution toward larger trees. Second entry fires had a greater effect, reducing ponderosa pine and Gambel oak overstory and midstory densities between 24% and 92%. Diameter distributions of both species shifted toward fewer, larger trees following second entry fires. Total fuel load was reduced by <20% in first entry fires and by half in second entry fires. Several objectives identified by the National Park Service (e.g., overstory ponderosa pine reduction) were not achieved with either fire entry; however, power analysis indicated that sample sizes were not adequate to fully detect long term changes following first entry fires.

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Landowner guide to sage-grouse conservation in Wyoming

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This guide, which includes the basic biology, life stages and habitat needs, habitat components, sagebrush monitoring, conservation planning in Wyoming, and predator impact, is intended to enhance understanding of sage-grouse conservation in Wyoming. Greater sage-grouse conservation, put simply, is understanding the needs of the sage-grouse for each life stage,knowing the life stage you provide habitat for, knowing what threats exist on the land, and implementing actions on the land to minimize or reduce the threats.

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Assessment of research on rangeland fire as a management practice: A synthesis

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This synthesis updated the Conservation Effects Assessment Project (CEAP) review and broadened the discussion of prescribed fire as a global management practice. It reviews and summarizes prescribed fire literature available through Web of Science using search terms in the title. The majority of literature (40%) evaluated plant responses to fire with fire behavior and management (29%), wildlife and arthropods (12%), soils (11%), and air quality (4%) evaluated less frequently. Generally, fire effects on plants are neutral to positive and the majority of negative responses lasted less than 2 years. Similarly, soil responses were recovered within 2 yr after burning. However, most studies did not report how long treatments were in place (62%) or the size of experimental units (52%).

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