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Fire Managers at Grand Canyon Continue Prescribed Fire Adjacent to Grand Canyon Village

Grand Canyon National Park fire managers continue to treat the Long Jim Prescribed Fire unit, as weather and fuel moisture conditions allow. On Tuesday, June 18, 2019, crews successfully treated 180 acres. https://www.nps.gov/grca/learn/news/fire-managers-at-grand-canyon-continue-prescribed-fire-adjacent-to-grand-canyon-village.htm




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Fire Resources at Grand Canyon Complete Ignition Operations on Long Jim Prescribed Fire

Grand Canyon National Park fire resources completed ignition operations on the Long Jim Prescribed Fire. Crews will continue to patrol the unit and mop up any areas along the fires perimeter that may threaten the holding line. https://www.nps.gov/grca/learn/news/fire-resources-at-grand-canyon-complete-ignition-operations-on-long-jim-rx.htm




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Grand Canyon National Park Suppressing Three Fires on North Rim

Recent monsoonal activity in the region resulted in several new lightning ignited fires on the North Rim of Grand Canyon National Park over the past several days. Fire crews are actively working to suppress three fires within Grand Canyon National Park. https://www.nps.gov/grca/learn/news/grand-canyon-national-park-suppressing-three-fires-on-north-rim.htm




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Ikes Fire on Grand Canyon National Park North Rim Grows to 25 Acres

The Ikes Fire, which started on July 25th, is approximately 25 acres. Fire behavior was active with surface fire of three to five foot flames where the fire was consuming dead logs. The fire is backing and flanking towards the east. https://www.nps.gov/grca/learn/news/ikes-fire-on-grand-canyon-national-park-north-rim-grows-to-25-acres.htm




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Precipitation Temporarily Slows Ikes Fire Growth on North Rim of Grand Canyon National Park

The Ikes Fire, which started on July 25th, is approximately 28 acres. Rain on Wednesday significantly reduced fire behavior, resulting in almost no new fire growth. https://www.nps.gov/grca/learn/news/precipitation-temporarily-slows-ikes-fire-growth-on-north-rim-of-grand-canyon-national-park.htm




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Ikes Fire Grows to 58 Acres Despite Monsoon Weather

The Ikes Fire continues to grow despite the minimal amount of moisture received from recent storms. Fire is estimated at 77 acres. Crews continue to prep the perimeter of the planned burn area. Road and Trail closures remain in place. https://www.nps.gov/grca/learn/news/ikes-fire-grows-to-58-acres-despite-monsoon-weather-08062019.htm




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Ikes Fire Promotes Healthy Forest Regeneration as Fire Activity Increases

The Ikes Fire moved into the northeast portion of the planning area that has a history of little to no fire activity in over two decades. This wildfire is consuming heavy fuel accumulations on the forest floor and is helping ensure the ecosystem will be healthier and more resilient in the future. https://www.nps.gov/grca/learn/news/ikes-fire-promotes-healthy-forest-regeneration-as-fire-activity-increases-20190807.htm




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Kaibab National Forest Institutes Temporary Area Closure for the Ikes Fire

The Kaibab National Forest instituted a Temporary Area Closure for all National Forests System lands and roads within the Ikes Fire Planning Area. This Order will be in effect beginning at 8:00 AM on August 8, 2019, and shall remain in effect until September 27, 2019, or until rescinded, whichever comes first. https://www.nps.gov/grca/learn/news/kaibab-national-forest-temporary-area-closure-for-ikes-fire-20190808.htm




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Ikes Fire Remains Active Despite Regular Rain Showers

The Ikes Fire has seen minimal growth over the past 2 days due to multiple rain showers over the fire area. Due to moisture, fire activity has been limited, however, the fire continues to burn within the duff layer of needles, leaf litter, and downed logs along the forest floor. https://www.nps.gov/grca/learn/news/ikes-fire-remains-active-despite-rain-20190810.htm




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Ikes Fire Grows Due To Warmer Drier Weather

The Ikes Fire has grown to 85 acres due to warmer, drier weather over the past few days. Over the weekend, Grand Canyon identified 3 lightning caused fires. The Royal Fire, Sinkhole Fire, and Outlet Fire located on the North Rim of Grand Canyon National Park are 100% contained due to full suppression tactics. https://www.nps.gov/grca/learn/news/ikes-fire-grows-due-to-warmer-drier-weather-20190812.htm




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Ikes Fire Having Tremendous Ecological Benefits

The Ikes Fire is being utilized to fulfill its natural role within a fire-dependent ecosystem while providing for point protection of identified sensitive natural and cultural resources. Resource objectives include reducing hazardous fuels, promoting forest regeneration, improving wildlife habitat, and restoring more open forest understory. https://www.nps.gov/grca/learn/news/ikes-fire-ecological-benefits-20190814.htm




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Ikes Fire Spreads Naturally As Crews Work To Secure Planning Area Perimeter

Warm, dry weather conditions have led to additional growth on the Ikes Fire, which is now approximately 1,535 acres and 20% contained. Smoke settled into the Grand Canyon overnight as temperatures cooled but smoke may begin to lift as temperatures warm up throughout the day. https://www.nps.gov/grca/learn/news/ikes-fire-spreads-crews-secure-planning-area-20190815.htm




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Ikes Fire Moves Across Landscape As Containment Increases

The Ikes Fire is approximately 3,289 acres, 42% contained, and has 89 resources assigned. The natural caused lightning fire is being utilized to fulfill its natural role within a fire-dependent ecosystem. The lightning-caused wildfire is actively burning within a 7,785-acre planning area. https://www.nps.gov/grca/learn/news/ikes-fire-moves-across-landscape-as-containment-increases-20190816.htm




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Incident Objectives Being Met On the Ikes Fire

The lightning caused Ikes Fire has burned through approximately 3,500 acres of the pre-determined 7,785 acre planning area. Currently, there are 88 resources assigned to the Ikes Fire. Yesterday, gusty winds prevented firefighters from carrying out firing operations. Crews patrolled the perimeter on the northeast and eastern portion of the fire while other personnel continued to prep the west side of the Forest Service Road 223. Observed fire behavior was active with backing fire along ridge tops and single tree torching. https://www.nps.gov/grca/learn/news/incident-objectives-being-met-on-ikes-fire-20190817.htm




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Ikes Fire Progresses At Steady Pace

Yesterday, the Ikes Fire grew to approximately 4,297 acres and has 87 resources assigned. Despite gusty winds and dry conditions, the fire spread across the planning area with low to moderate fire behavior. The weather will continue to be drier than normal with no chance of precipitation in the forecast. Light winds are expected out of the southwest at 8-10 mph with gusts up to 18 mph. Smoke from the Ikes Fire, along with other fires in the area, will be visible throughout the surrounding area. https://www.nps.gov/grca/learn/news/ikes-fire-progresses-at-steady-pace-20190818.htm




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Ikes Fire Holding Well Within Perimeter

Yesterday, crews continued to patrol and hold the northern boundary and improve line. Firefighters on the southern boundary lit debris piles constructed in the early phases of line preparation. This tactic deprives the fire of excess fuel as it spreads to the west. https://www.nps.gov/grca/learn/news/ikes-fire-holding-well-within-perimeter.htm




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Ikes Fire Behavior Aligns With Land Managers’ Objectives

Yesterday, firefighters moved west along the W4 road and improved the boundary line with hand ignitions. Crews also created debris piles to clean up vegetation along the forest floor and hazard trees. Fire managers completed a reconnaissance flight to assess fire behavior within the interior of the fire perimeter. Fire effects are consistent with land managers’ objectives and are expected to remain as such based on current conditions. https://www.nps.gov/grca/learn/news/ikes-fire-behavior-aligns-with-land-managers-objectives.htm




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Ikes Fire Expands, Crews Continue To Meet Objectives

Yesterday, firefighters did minimal hand ignitions along the National Park Service W4 Road as the fire progressed slowly to the west. Crews did not conduct firing operations along Forest Road 223 as more prep work is needed before putting additional fire on the ground. Smoke from the Ikes Fire, along with other fires in the area, will be visible throughout the area and may cause smoke impacts. The North Rim Village and businesses at Grand Canyon National Park are OPEN. Temporary trail and road closures for the Ikes Fire Planning Area within Grand Canyon National Park include: Powell Plateau Trail, North Bass Trail, Fire Point, Swamp Point, and the W4 road heading north starting at the intersection of the W4 and W1 roads. https://www.nps.gov/grca/learn/news/ikes-fire-expands-crews-continue-to-meet-objectives-20190821.htm




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Ikes Fire Holding After Tested By Winds

Over the past two days, firefighters made progress with firing operations along Forest Road 223. This tactic is conducted to strengthen and improve the northern boundary of the planning area. The North Rim Village and businesses are open. However, road and trail closures remain in effect for the Ikes Fire planning area for Grand Canyon National Park and the Kaibab National Forest. https://www.nps.gov/grca/learn/news/ikes-fire-holding-after-tested-by-winds-20190823.htm




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Command Of Ikes Fire Transitions To Type 4 Team, Closures Remain In Place

The Ikes Fire, which has been managed by a Local Type 3 Incident Management Team (IMT), transitioned to a local Type 4 Incident Commander effective this morning, Sunday, August 25, 2019. This will be the Final Ikes Fire News Release unless significant fire activity occurs. North Rim Closures: Powell Plateau Trail, The North Bass Trail, Fire Point, Swamp Point, and the W4 road north of the intersection of the W4 and W1 Roads. https://www.nps.gov/grca/learn/news/ikes-fire-command-transitions-to-type-4-team-closures-remain-20190825.htm




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Ikes Fire Grows, Helicopters to Assist

The 11,000-acre lightning caused wildfire which is located on the North Rim of Grand Canyon National Park and the North Kaibab Ranger District of the Kaibab National Forest became active last week during a wind event that produced wind gusts to 45 mph. https://www.nps.gov/grca/learn/news/ikes-fire-grows-helicopters-to-assist-2019-09-26.htm




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Mental health help for fire ravaged communities




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Mental health support during bushfire crisis




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Travel subsidies for patients in bushfire areas




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Wood and Coal Cofiring In Interior Alaska: Utilizing Woody Biomass From Wildland Defensible-Space Fire Treatments and Other Sources

Cofiring wood and coal at Fairbanks, Alaska, area electrical generation facilities represents an opportunity to use woody biomass from clearings within the borough's wildland-urban interface and from other sources, such as sawmill residues and woody material intended for landfills. Potential benefits of cofiring include air quality improvements, reduced greenhouse gas emissions, market and employment development opportunities, and reduction of municipal wood residues at area landfills. Important issues that must be addressed to enable cofiring include wood chip uniformity and quality, fuel mixing procedures, transportation and wood chip processing costs, infrastructure requirements, and long-term biomass supply. Additional steps in implementing successful cofiring programs could include test burns, an assessment of area biomass supply and treatment needs, and a detailed economic and technical feasibility study. Although Fairbanks North Star Borough is well positioned to use biomass for cofiring at coal burning facilities, long-term cofiring operations would require expansion of biomass sources beyond defensible-space-related clearings alone. Long-term sources could potentially include a range of woody materials including forest harvesting residues, sawmill residues, and municipal wastes.




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The rules on having a bonfire in your garden as Surrey councils warn against them

While it is not illegal to have a bonfire, some Surrey councils are urging residents not to light them




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Polishing the prism: improving wildfire mitigation planning by coupling landscape and social dimensions

Effectively addressing wildfire risk to communities on large multi-owner landscapes requires an understanding of the biophysical factors that influence risk, such as fuel loads, topography, and weather, and social factors such as the capacity and willingness for communities to engage in fire-mitigation activities.




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Adaptation to wildfire: A fish story

In the Pacific Northwest, native salmon and trout are some of the toughest survivors on the block. Over time, these fish have evolved behavioral adaptations to natural disturbances, and they rely on these disturbances to deliver coarse sediment and wood that become complex stream habitat. Powerful disturbances such as wildfire, postfire landslides, and debris flows may be detrimental to fish populations in the short term, but over time, they enrich instream habitats, enhancing long-term fish survival and productivity.




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Forests, people, fire: Integrating the sciences to build capacity for an “All Lands” approach to forest restoration

Interest in landscape-scale approaches to fire management and forest restoration is growing with the realization that these approaches are critical to maintaining healthy forests and protecting nearby communities. However, coordinated planning and action across multiple ownerships have been elusive because of differing goals and forest management styles among landowners. Scientists with the Pacific Northwest Research Station and their colleagues recognized that working at the landscape scale requires integrating the biophysical, social, and economic dimensions of the problem, and this necessitates collecting new types of information and inventing new tools.




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The recovery of soil fungi following a fire

Although burned trees are the most visible damage following a wildfire, a forest’s soil can also be damaged. The heat generated by a wildfire can alter the soil’s physical properties and kill the fungi and bacteria that are responsible for nutrient cycling and other ecosystem services. What isn’t well understood is the extent of the heating within the soil and how quickly the soil recovers.




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Principal short-term findings of the National Fire and Fire Surrogate study.

Principal findings of the National Fire and Fire Surrogate (FFS) study are presented in an annotated bibliography and summarized in tabular form by site, discipline (ecosystem component), treatment type, and major theme. Composed of 12 sites, the FFS is a comprehensive multidisciplinary experiment designed to evaluate the costs and ecological consequences of alternative fuel reduction treatments in seasonally dry forests of the United States. The FFS has a common experimental design across the 12-site network, with each site a fully replicated experiment that compares four treatments: prescribed fi re, mechanical treatments, mechanical + prescribed fire, and an unmanipulated control. We measured treatment cost and variables within several components of the ecosystem, including vegetation, the fuel bed, soils, bark beetles, tree diseases, and wildlife in the same 10-ha experimental units. This design allowed us to assemble a fairly comprehensive picture of ecosystem response to treatment at the site scale, and to compare treatment response across a wide variety of conditions.




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A field guide to predict delayed mortality of fire-damaged ponderosa pine: application and validation of the Malheur model.

The Malheur model for fire-caused delayed mortality is presented as an easily interpreted graph (mortality-probability calculator) as part of a one-page field guide that allows the user to determine postfire probability of mortality for ponderosa pine (Pinus ponderosa Dougl. ex Laws.).




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A key for predicting postfire successional trajectories in black spruce stands of interior Alaska.

Black spruce (Picea mariana (Mill) B.S.P) is the dominant forest cover type in interior Alaska and is prone to frequent, stand-replacing wildfires.




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Interactive Marquee for Safari, Chrome and Firefox

A second version of the marquee demo using CSS3 and keyframes to produce an interactive marquee for any length of text.




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Three planets and the moon animation for Safari, Chrome and Firefox

Using CSS3 transitions, transforms and keyframes to produce a 3D animation of the Earth, Mars, Jupiter and the Moon.




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3D Dymaxion Map animation for Safari, Chrome and Firefox

Using CSS3 transitions, transforms and keyframes to produce a 3D Dymaxion Map of the Earth's surface.




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The parts of Surrey, Hampshire and Sussex that could see Spitfire flypast commemorating VE Day

The spitfires will be flying over 11 locations across the three counties




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Crews fought hundreds of vicious heathland fires during the summer of 1976

Eyewitnesses said flames leaped 100 feet into the air above Thursley, which was classed as one of the worst-hit areas during the fires in July 1976




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Lightwater heathland fire: Residents urged to 'keep windows and doors shut'

Crews and officers from Surrey Fire and Rescue Service and Surrey Police were in attendance




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Bioengery from trees: using cost-effective thinning to reduce forest fire hazards, based on science

Increasingly large and severe wildfires threaten millions of forested acres throughout the West. Under certain conditions, mechanical thinning can address these hazardous conditions while providing opportunitiesto create renewable energy and reduce our carbon footprint but how do land managers decide whether thinning is a good idea? How do they decide where to begin, and what to do with the removed trees? Prioritizing treatment areas and determining the most effective techniques for fuel hazard reduction depends on various factors such as owner objectives, forest types, and the availability of processing facilities.




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EPISODE 1—SCARRED FOR LIFE: WHAT TREE RINGS CAN REVEAL ABOUT FIRE HISTORY

April 2012—To anticipate how a changing climate might impact future forest fires, scientists need to understand the past. But how can you tell the frequency and severity of wildfires that occurred hundreds—or, even, thousands—of years ago? Part of the answer lies in tree rings (6:09)




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Costs of Landscape Silviculture For Fire and Habitat Management

In forest reserves of the U.S. Pacific Northwest, management objectives include protecting late-seral habitat structure by reducing the threat of large-scale disturbances like wildfire. We simulated how altering within and among-stand structure with silvicultural treatments of differing intensity affected late-seral forest (LSF) structure and fire threat (FT) reduction over 30 years in a 6070-ha reserve. We then evaluated how different financial requirements influenced the treatment mix selected for each decade, the associated effects on FT reduction and LSF structure in the reserve, and treatment costs. Requirements for treatments to earn money (NPV+), break even (NPVO), or to not meet any financial goal at the scale of the entire reserve (landscape) affected the predicted reduction of FT and the total area of LSF structure in different ways. With or without a requirement to break even, treatments accomplished about the same landscape level of FT reduction and LSF structure. Although treatment effects were similar, their associated net revenues ranged from negative $1 million to positive $3000 over 30 years. In contrast, a requirement for landscape treatments to earn money ($0.5 to $1.5 million NPV) over the same period had a negative effect on FT reduction and carried a cost in terms of both FT reduction and LSF structure. Results suggest that the spatial scale at which silvicultural treatments were evaluated was influential because the lowest cost to the reserve objectives was accomplished by a mix of treatments that earned or lost money at the stand level but that collectivel broke even at the landscape scale. Results also indicate that the timeframe over which treatments were evaluated was important because if breaking even was required within each decade instead of cumulatively over all three, the cost in terms of FT reduction and LSF structure was similar to requiring landscape treatments to earn $0.5 million NPV.




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Prescribed Fires Are Not Created Equal: Fire Season and Severity Effects In Ponderosa Pine Forests of The Southern Blue Mountains

In the mid-1990s, forest managers on the Malheur National Forest were concerned about their prescribed fire program. Although they have only a few weeks of acceptable conditions available in the spring and fall, they were worried that spring-season prescribed burning might be exacerbating black stain root disease and having negative effects on understory plants.




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Searing The Rhizosphere: Belowground Impacts of Prescribed Fires

A century of fire suppression has resulted in dense fuel loads within the dry pine forests of eastern Oregon . To alleviate the risk of stand-replacing wildfire, forest managers are using prescribed fire and thinning treatments. Until recently, the impact of these fuel treatments on soil productivity has been largely unknown. Such information is essential for making sound management decisions about the successful reintroduction of fire to the ecosystem to retain biodiversity of soil fungi and achieve the desired future condition of large ponderosa pines with low fuel loads. In a recent pair of studies, led by researchers at the PNW Forestry Sciences Laboratory in Corvallis, Oregon, novel molecular techniques were utilized to investigate the response of soil ecosystems to prescribed burning and thinning. The research compared impacts of the season of burn and various combinations of fuel-reducing treatments. Results suggest that overly severe fires can damage soil productivity and that less intense fires can be used to gradually reduce accumulations of fuel. The findings are currently being implemented in decisions about forest management and contribute important new information to the science.




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Citizen-agency interactions in planning and decisionmaking after large wildfires

This report reviews the growing literature on the concept of agency-citizen interactions after large wildfires. Because large wildfires have historically occurred at irregular intervals, research from related fields has been reviewed where appropriate. This issue is particularly salient in the West where excess fuel conditions indicate that the large wildfires occurring in many states are expected to continue to be a major problem for forest managers in the coming years. This review focuses on five major themes that emerge from prior research: contextual considerations, barriers and obstacles, uncertainty and perceptions of risk, communication and outreach, and bringing communities together. It offers ideas on how forest managers can interact with stakeholders for planning and restoration activities after a large wildfire. Management implications are included.




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Making fire and fire surrogate science available: a summary of regional workshops with clients

Operational-scale experiments that evaluate the consequences of fire and mechanical "surrogates" for natural disturbance events are essential to better understand strategies for reducing the incidence and severity of wildfire. The national Fire and Fire Surrogate (FFS) study was initiated in 1999 to establish an integrated network of long-term studies designed to evaluate the consequences of using fire and fire surrogate treatments for fuel reduction and forest restoration. Beginning in September2005, four regional workshops were conducted with selected clients to identify effective and efficient means of communicating FFS study findings to users. We used participatory evaluation to design the workshops, collect responses to focused questions and impressions, and summarize the results. We asked four overarching questions: (1) Who needs fuel reduction information? (2) What information do they need? (3) Why do they need it? (4) How can it best be delivered to them? Participants identified key users of FFS science and technology, specific pieces of information that users most desired, and how this information might be applied to resolve fuel reduction and restoration issues. They offered recommendations for improving overall science delivery and specific ideas for improving delivery of FFS study results and information. User groups identified by workshop participants and recommendations for science delivery are then combined in a matrix to form the foundation of a strategic plan for conducting science delivery of FFS study results and information. These potential users, their information needs, and preferred science delivery processes likely have wide applicability to other fire science research.




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Soils under fire: soils research and the Joint Fire Science Program

Soils are fundamental to a healthy and functioning ecosystem. Therefore, forest land managers can greatly benefit from a more thorough understanding of the ecological impacts of fire and fuel management activities on the vital services soils provide. We present a summary of new research on fire effects and soils made possible through the Joint Fire Science Program and highlight management implications where applicable. Some responses were consistent across sites, whereas others were unique and may not easily be extrapolated to other sites. Selected findings include (1) postfire soil water repellency is most likely to occur in areas of high burn severity and is closely related to surface vegetation; (2) although wildfire has the potential to decrease the amount of carbon stored in soils, major changes in land use, such as conversion from forest to grasslands, present a much greater threat to carbon storage; (3) prescribed fires, which tend to burn less severely than wildfires and oftentimes have minor effects on soils, may nonetheless decrease species richness of certain types of fungi; and (4) early season prescribed burns tend to have less impact than late season burns on soil organisms, soil carbon, and other soil properties.




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Dry forests of the Northeastern Cascades Fire and Fire Surrogate Project site, Mission Creek, Okanogan-Wenatchee National Forest

The Fire and Fire Surrogate (FFS) project is a large long-term metastudy established to assess the effectiveness and ecological impacts of burning and fire "surrogates" such as cuttings and mechanical fuel treatments that are used instead of fire, or in combination with fire, to restore dry forests. One of the 13 national FFS sites is the Northeastern Cascades site at Mission Creek on the Okanogan- Wenatchee National Forest. The study area includes 12 forested stands that encompass a representative range of dry forest conditions in the northeastern Cascade Range. We describe site histories and environmental settings, experimental design, field methods, and quantify the pretreatment composition and structure of vegetation, fuels, soils and soil biota, entomology and pathology, birds, and small mammals that occurred during the 2000 and 2001 field seasons. We also describe the implementation of thinning treatments completed during 2003 and spring burning treatments done during 2004 and 2006.




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Effects of timber harvest following wildfire in western North America

Timber harvest following wildfire leads to different outcomes depending on the biophysical setting of the forest, pattern of burn severity, operational aspects of tree removal, and other management activities. Fire effects range from relatively minor, in which fire burns through the understory and may kill a few trees, to severe, in which fire kills most trees and removes much of the organic soil layer. Postfire logging adds to these effects by removing standing dead trees (snags) and disturbing the soil. The influence of postfire logging depends on the intensity of the fire, intensity of the logging operation, and management activities such as fuel treatments. In severely burned forest, timing of logging following fire (same season as fire vs. subsequent years) can influence the magnitude of effects on naturally regenerating trees, soils, and commercial wood value. Removal of snags reduces long-term fuel loads but generally results in increased amounts of fine fuels for the first few years after logging unless surface fuels are effectively treated. By reducing evapotranspiration, disturbing the soil organic horizon, and creating hydrophobic soils in some cases, fire can cause large increases in surface-water runoff, streamflow, and erosion. Through soil disturbance, especially the construction of roads, logging with ground-based equipment and cable yarding can exacerbate this effect, increasing erosion and altering hydrological function at the local scale. Effects on aquatic systems of removing trees are mostly negative, and logging and transportation systems that disturb the soil surface or accelerate road-related erosion can be particularly harmful unless disturbances are mitigated. Cavity-nesting birds, small mammals, and amphibians may be affected by harvest of standing dead and live trees, with negative effects on most species but positive or neutral effects on other species, depending on the intensity and extent of logging. Data gaps on postfire logging include the effects of various intensities of logging, patch size of harvest relative to fire size, and long-term (10+ years) biophysical changes. Uncertainty about the effects of postfire logging can be reduced by implementing management experiments to document long-term changes in natural resources at different spatial scales.




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Ecological foundations for fire management in North American forest and shrubland ecosystems

This synthesis provides an ecological foundation for management of the diverse ecosystems and fire regimes of North America, based on scientific principles of fire interactions with vegetation, fuels, and biophysical processes. Although a large amount of scientific data on fire exists, most of those data have been collected at small spatial and temporal scales. Thus, it is challenging to develop consistent science-based plans for large spatial and temporal scales where most fire management and planning occur. Understanding the regional geographic context of fire regimes is critical for developing appropriate and sustainable management strategies and policy. The degree to which human intervention has modified fire frequency, intensity, and severity varies greatly among different ecosystems, and must be considered when planning to alter fuel loads or implement restorative treatments. Detailed discussion of six ecosystems--ponderosa pine forest (western North America), chaparral (California), boreal forest (Alaska and Canada), Great Basin sagebrush (intermountain West), pine and pine-hardwood forests (Southern Appalachian Mountains), and longleaf pine (Southeastern United States)--illustrates the complexity of fire regimes and that fire management requires a clear regional focus that recognizes where conflicts might exist between fire hazard reduction and resource needs. In some systems, such as ponderosa pine, treatments are usually compatible with both fuel reduction and resource needs, whereas in others, such as chaparral, the potential exists for conflicts that need to be closely evaluated. Managing fire regimes in a changing climate and social environment requires a strong scientific basis for developing fire management and policy.