Fire Ecology & Effects
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In this study, researchers measured particulate sediments transported by wind to assess risks to areas downwind of burned rangelands in SE Idaho. Results indicate that wildfire can convert a relatively stable landscape into one that is a major dust source.
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This study explored how fire and various other natural events might shape sagebrush ecosystems in eastern Oregon, USA, and whether those events could affect fire rotation. Results suggested other disturbance events were important in shaping all but the most productive sagebrush communities and influenced fire rotation in drier sagebrush communities. Insects and pronghorn browsing may have been as important as fire in shaping sagebrush-steppe landscapes with freezekill and snow mold locally important.
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This review proposes a classification framework for aspen that is defined by key fire regime parameters (fire severity and probability), and that reflects underlying biophysical settings and correlated aspen functional types. Five aspen fire regime types are proposed: (1) fire-independent, stable aspen; (2) fire-influenced, stable aspen; (3) fire-dependent, seral, conifer-aspen mix; (4) fire-dependent, seral, montane aspen-conifer; and (5) fire-dependent, seral, subalpine aspen-conifer.
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In this literature synthesis and meta-analysis, researchers found that the overall mean effect of fuel treatments on fire responses is large and significant, equating to a reduction in canopy volume scorch from 100% in an untreated stand to 40% in a treated stand, a reduction in scorch height from 30.5 m to 16.1 m, or an inferred reduction in flame length from 3.4 m to 2.1 m. But our synthesis demonstrates that fuel treatments vary widely in effectiveness, which is largely explained by vegetation and treatment type.
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This special report from the Ecological Restoration Institute at Northern Arizona University was presented to the U.S. Department of Interior, Office of Wildland Fire. The goal of this synthesis was to find, analyze and synthesize the best available evidence that policy makers need to make decisions about how to spend the limited money available to address the nation’s growing fire problem.
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Abstracts of recent papers on fire and fuels management in the West. Prepared by Craig Goodell, Fire Ecologist, USFS Pacific Northwest Region, Portland, OR.
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This guide provides a set of tools that will help field biologists, land managers, and private landowners conduct rapid qualitative field assessments that address the kind of site and its current state. These tools include a list of questions to be addressed and a series of photographs, keys, tables, and figures to help evaluate a site. Conducting this assessment will help prioritize sites to be treated, select the best treatment, and predict outcomes.
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This Nature article discusses large, severe fires, climate change, insect outbreaks, and recovery of western forests with USGS scientist, Craig Allen and WERC scientist, Nate Stephenson. on the conversion of forest ecosystems due to climate change and altered fire regimes.
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This paper reviews the nature and characteristics of bark beetle-altered fuel complexes in the conifer forests of the Interior West and the challenges of understanding the effects on extreme fire behavior, including the initiation and spread of crown fires. We also discuss how emerging fire management plans in the U.S. have begun to integrate wildfire management and other forest health objectives with the specific goal of achieving biodiversity and ecosystem resiliency while simultaneously reducing the existence of hazardous fuel complexes.
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This study suggests that both prescribed fire and its mechanical surrogates are generally successful in meeting short-term fuel-reduction objectives in seasonally dry forests in the western and southern United States, making treated stands more resilient to high-intensity wildfire. Although mechanical treatments do not serve as complete surrogates for fire, their application can help mitigate costs and liability in some areas. Desired treatment effects on fire hazards are transient, which indicates that after fuel-reduction management starts, managers need to be persistent with repeated treatment.