Hazardous Fuels Reduction Research Articles

Institutions That Influence Cross-Boundary Forest Management: Four Cases of Shared Stewardship in Practice

Abstract The USDA Forest Service’s 2018 Shared Stewardship Strategy emphasizes the need to coordinate work with actors across boundaries to increase the pace and scale of land management, particularly as it relates to forest restoration and wildfire mitigation. We researched how the Strategy was being implemented at the project level by conducting forty-four interviews with individuals closely involved with four large-scale cross-boundary hazardous fuels reduction projects. Our objectives were to identify institutions that facilitated and challenged cross-boundary work under the Strategy and document how actors innovated to overcome challenges they encountered. We found that Shared Stewardship had the greatest opportunity to shift the larger forest management paradigm within states that created new institutions specifically to support the Strategy and its objectives. However, numerous institutional challenges such as yearly funding levels and complex bureaucratic requirements, frustrated efforts to increase the pace and scale of management actions under the Strategy. Study Implications: We conducted research on cross-boundary projects that met the intent of the USDA Forest Service’s Shared Stewardship Strategy. We found that the cross-boundary tenets of the Strategy were best supported when states worked together with the federal government to create new institutions that facilitate multijurisdictional work. Our interviewees said that various bureaucratic hurdles remain difficult to navigate, and that they believe annual funding appropriations are not currently enough to support significant increases in the pace and scale of management. Our interviewees said Shared Stewardship supported cross-boundary actions, but more remains to be done to best support multijurisdictional work.

Managed Wildfire: A Strategy Facilitated by Civil Society Partnerships and Interagency Cooperation

Federal land managers in the United States are permitted to manage wildfires with strategies other than full suppression under appropriate conditions to achieve natural resource objectives. However, policy and scientific support for “managed wildfire” appear insufficient to support its broad use. We conducted case studies in northern New Mexico and southwestern Utah to examine how managers and stakeholders navigated shifting barriers and opportunities to use managed wildfire from 2018 to 2021. The use of managed wildfire was fostered through an active network of civil society partnerships in one case, and strong interagency cooperation and existing policies and plans in the other. In both, the COVID-19 pandemic, drought, and agency direction curtailed recent use. Local context shapes wildfire response strategies, yet centralized decision-making and policy also can enable or constrain them. Future research could refine the understanding of social factors in incident decision-making, and evaluation of risks and tradeoffs in wildfire response. Implications Managers and stakeholders seeking to restore fire’s ecological roles in their own landscapes through the use of managed wildfires could use these findings to cultivate supportive local environments for their objectives. Both case studies offer examples of how managed wildfires may be facilitated through civil society partnerships and interagency cooperation. Networks of civil society and agency partners can encourage policy change at multiple levels through concerted efforts over time, particularly by building a larger case through localized examples of collaborative projects and a body of regionally relevant scientific evidence. Strong interagency cooperation on both mitigation and response can also foster an environment of mutual understanding, even given differing missions and mandates for managed wildfire. Management implications Federal wildfire response must consider multiple objectives that may compete across scales, social-ecological contexts, and timeframes. These include minimizing negative impacts on human values, responding to immediate risks of fire exposure, managing land sustainably under longer timeframes; and meeting accomplishment targets, such as acres of hazardous fuels reduction, ecological restoration, and other resource objectives. Federal wildfires and land managers are permitted to manage wildfires for natural resource objectives but face challenges of ambiguous terminology, conflicting policies, drought, increasing numbers of homes in wildlands, and unanticipated events, such as the COVID-19 pandemic. Conditions, opportunities, and barriers to manage wildfire vary substantially by locality and are dependent on local actors, yet also subject to higher-level changes in policy direction. Beyond improved risk analytics and decision support tools, enabling social and internal institutional conditions may also facilitate opportunities for use of managed wildfire. Social science can provide evidence and frameworks including concrete lessons learned, expanded use of after-action reviews, process monitoring, briefings with leadership, and science application through boundary-spanning organizations.

Wildfire exposure to the wildland urban interface in the western US

Predicting wildfire disasters presents a major challenge to the field of risk science, especially when fires propagate long distances through diverse fuel types and complex terrain. A good example is in the western US where large tracts of public lands routinely experience large fires that spread from remote wildlands into developed areas and cause structure loss and fatalities. In this paper we provide the first comprehensive assessment of where public wildlands potentially contribute wildfire exposure to communities in the 11 western US states. We used simulation modeling to map and characterize the composition of the source landscapes (firesheds) and recipient communities in terms of fuels, fire behavior and forest management suitability. The information was used to build a prototype investment prioritization framework that targets highly exposed communities where forest and fuel management activities are feasible. We found that simulated wildfires ignited on national forests can potentially affect about half of the communities in the western US (2560 out of 5118), with 90% of exposure affecting the top 20% of the communities (n = 516). Firesheds within national forests, defined as areas that have the potential to expose communities to fire, were estimated at 35 million ha (62% of the total national forest area), and were almost three times larger than the affected community lands. Large contiguous areas of wildfire transmission were evident on a number of national forests. Only 22% of the fireshed area is forested, fire-adapted, and lies within land management designations that allow mechanical fuels management. The methods demonstrate how cross-boundary exposure can be factored into prioritizing federal investments in hazardous fuels reduction on national forests in concert with community protection measures. The results can also help scale wildfire governance systems to match the geography of risk from large wildfire events, which augments existing assessments that do not explicitly identify the source of risk to communities.

Stand Dynamics of Pinyon-Juniper Woodlands After Hazardous Fuels Reduction Treatments in Arizona

Pinyon-juniper ecosystems occur extensively across western North America, and at the landscape scale, variation in structure and composition is influenced by topographic position, soils, disturbance history, and local climate. The persistent pinyon-juniper woodland is a common structural form, and though they are known to be infrequent-fire systems, there is increasing interest in implementation of hazardous fuels reduction treatments in woodlands, especially in the wildland-urban interface. Few studies have quantified stand dynamics following fuels reduction treatments in persistent woodlands or compared treatment outcomes to conditions that develop under natural disturbance and successional processes. In 2004, we established a randomized, replicated study in woodlands of northern Arizona, and monitored stand dynamics and understory responses to determine how stand-level changes differed between common fuels reduction approaches. We compared the resulting structure with a conceptual state-and-transition model. Results showed that, over the 11 yr after treatment, juniper tree densities decreased by 8.4% and 0.9% but increased by 14.0% and 27.3% in Control, Burn, Thin, and Thin + Burn treatments, respectively. Pinyon tree densities decreased by 1.1% and 3.3%, increased by 12.2%, and decreased 7.9% in Control, Burn, Thin, and Thin + Burn treatments, respectively. All treatments showed fuel load reductions throughout the 11-yr study period and minimal rebound of tree recruitment toward pretreatment conditions. Prescribed fire alone (Burn) maintained persistent woodland conditions. Thinning treatments substantially reduced small tree densities and, with the addition of prescribed fire, produced losses of large trees. Thinning with prescribed fire (Thin + Burn) tended to produce conditions qualitatively unlike those described by our state-and-transition model. Evaluation of these commonly used fuels treatments against our state-and-transition model suggested that concerns regarding loss of ecological integrity may be warranted.

Mobile Pyrolysis for Hazardous Fuels Reduction and Biochar Production in Western Forests

Mobile pyrolysis is a novel approach to fuels reduction. In this article, we address the experiences of the Utah Biomass Resources Group in developing mobile pyrolysis technologies and generating the products derived from pyrolysis of woody biomass—biochar, bio-oil, and syngas. We describe development of a mobile pyrolysis platform for biomass conversion demonstration, its use in a series of demonstrations conducted in several western states, and the usefulness of the resulting products. Additionally, we discuss our outreach and communication efforts to date and speculate on the future of the technology.

Environmental justice and U.S. Forest Service hazardous fuels reduction: A spatial method for impact assessment of federal resource management actions

Natural resource managers of federal lands in the USA are often tasked with various forms of social and economic impact analysis. Federal agencies in the USA also have a mandate to analyze the potential environmental justice consequences of their activities. Relatively little is known about the environmental justice impacts of natural resource management in rural areas. Quantitative environmental justice analyses have so far heavily favored urban populations, in part owing to the difficulty of quantitative analysis of rural U.S. Census data. We developed a spatial method for integrating rural U.S. Census data with natural resource management data to address this gap. The method learns from methodological advances in overcoming the spatial limitations of Census data, but prioritizes a simple, efficient technique that is applicable not only for identifying potential environmental justice problems, but also to a potentially broad spectrum of natural resource management activities and spatial scales. We pilot test the method by analyzing the hazardous fuels reduction activities of two national forests in central Oregon, USA. We find no evidence of systematic environmental justice issues on either forest, but identify local areas that warrant additional investigation.

Stand composition and aspect are related to conifer regeneration densities following hazardous fuels treatments in Colorado, USA

Abstract Hazardous fuels reduction treatments often reduce the likelihood of undesirable fire behavior (e.g. crown fire) through some combination of tree thinning and surface fuel reduction. However, fuels treatment effectiveness declines over time as fuels re-accumulate and new tree cohorts of trees establish and grow. Fuels treatment longevity therefore depends in part on post treatment tree regeneration rates, which vary depending on characteristics of sites and treatments as well as on stand composition. We used a chronosequence of 3–12 year old fuels treatments to investigate the impact of site (“wet” north aspects versus “dry” south aspects), treatment type (thinning with and without follow up slash burning), and stand composition on conifer regeneration following treatments in stands of ponderosa pine (Pinus ponderosa Lawson & C. Lawson) and Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco var. glauca [Beissn.] Franco) in Colorado, USA. We found conifer regeneration density was >500 trees ha−1 on average by 10 years post treatment. While stands on north aspects had twice the regeneration density of those on south aspects, the rate of increase since treatment was similar. Instead, there was significantly more regeneration on north aspects because these stands contained a considerable amount of Douglas-fir, which was largely absent on south aspects. Ponderosa pine regeneration density increased with time since treatment, while Douglas-fir regeneration density did not, which suggests that treatments promoted reproduction of ponderosa pine. Conversely, Douglas-fir regeneration density was related to the amount of Douglas-fir basal area in stands, which was not the case for ponderosa pine, probably because all stands had ample amounts of ponderosa pine basal area. There was no difference in regeneration density between burned and unburned stands. Our results highlight the influence of stand composition and site characteristics on tree regeneration following fuels treatments. In this study, fuels treatments acted much like shelterwood regeneration treatments for ponderosa pine, pairing favorable establishment environments for this species with a seed source. This resulted in ponderosa pine trees establishing even on relatively dry south aspects, while Douglas-fir regeneration may have been inhibited by seed availability and was largely confined to wetter north aspects. Despite similar tree regeneration rates across aspects, fuels treatment effects may nonetheless deteriorate more quickly on north aspects because of this Douglas-fir regeneration, much of which predated treatments. Indeed, advance regeneration was common in all of our stands, suggesting the longevity of fuels treatment effects will depend substantially on whether these trees are eventually able to release.

Restoration benefits of re-entry with resource objective wildfire on a ponderosa pine landscape in northern Arizona, USA

Abstract Prescriptions for ecological restoration of ponderosa pine (Pinus ponderosa) forests of the American Southwest are generally aimed at approximating pre-fire-exclusion conditions by reducing tree densities and hazardous fuels, and reintroducing surface fire. Increasingly, land managers are utilizing natural fire ignitions to achieve restoration and hazardous fuels reduction objectives, but to minimize risk of escape and reduce potential for undesirable outcomes fires are commonly managed under weather and fuel moisture conditions that produce lower burn severities. Few studies have examined effectiveness of incremental approaches that attempt to restore these ecosystems by allowing repeated, low-severity wildfires to reburn sites. We analyzed a 12,035-ha landscape on the Kaibab National Forest in northern Arizona and compared forest structure, hazardous fuel loading, and potential fire behavior in areas that had burned once (single fire) to others that had burned twice (re-entry) over the preceding 13 years. Forest structure and hazardous fuels characteristics in re-entry areas tended to be closer to historical ranges of variability (HRV) than in single fire areas; however, we found few statistically significant differences and tree densities in both single and re-entry fires remained higher than HRV by up to 3.5-fold. Similarly, potential fire behavior variables were statistically similar between single and re-entry fire areas. Analysis of burn severity effects suggested that trends toward reduced tree density and canopy fuels in re-entry areas were consistently driven by “cleanup effects”, whereby re-entry fires produced low-severity effects in areas showing unburned/low severity after first-entry fires. Evidence of “additive effects”, whereby restoration and hazardous fuels reduction objectives were being met incrementally by repeated low-severity fire, was difficult to detect on the re-entry fire landscape. Thus, with similar management, several additional fire entries will be required to restore tree densities to within the historical range. Further, our findings suggest that managing resource objective wildfires to allow for more moderate-severity burning, even with a single entry, may be more effective for restoring these forests than repeated low-severity entries.

Comparing fuels reduction and patch mosaic fire regimes for reducing fire spread potential: A spatial modeling approach

Reduction of fire hazard is becoming increasingly important in managed landscapes globally. Fuels reduction prescribed burn treatments are the most common form of reducing fire hazard on landscapes around the world but often result in homogenized fuel age structures and habitats. Alternatively, the size of unplanned fires, and hence fire hazard, can be reduced by controlling the size and patterning of fuels treatments in a patch mosaic arrangement on landscapes. Patch mosaic burning is being implemented globally as a means to increase heterogeneity to mimic natural fire regime results. Funding for prescribed fire programs is often justified primarily on hazardous fuels reduction with secondary consideration given for ecological effectiveness, which can be increased by particular fire mosaic patterns in some systems. The question we address is: Which of two prescribed fire treatment regimes, fuels reduction or patch mosaic burning, reduces fire hazard most effectively? We address the question using computer simulation modeling on synthetic landscapes representing both fire regime treatments. Treatment scale was important. Among fuel reduction treatments, large blocks burned less area than small blocks. For the mosaic treatments, small blocks reduced fire size the most (out of all treatments) and had the least variance in area burned. It is possible to reduce fire hazard and to provide heterogeneous age fuels structure on the landscape, simultaneously benefiting humans and many native fire-dependent species requiring mosaic habitat patterns.

The Influence of Market Proximity on National Forest Hazardous Fuels Treatments

The US Department of Agriculture Forest Service's focus on hazardous fuels reduction has increased since the adoption of the National Fire Plan in 2001. However, appropriations for hazardous fuels reduction still lag behind wildfire suppression spending. Offsetting fuels treatment costs through biomass utilization or by using innovative administrative mechanisms such as stewardship contracting are two approaches to stretching appro- priated dollars further across the landscape. We use fuels treatment data (n 8,451 locations) to ask how wood- processing infrastructure influences where and how much hazardous fuels treatments, biomass utilization, and stewardship contracting occur on national forests in Oregon and Washington. We found that national forest ranger districts that are relatively close in proximity to sawmills or biomass facilities treated more overall ha and more wildland-urban interface ha and used stewardship contracting on more ha than ranger districts further away and that there was a threshold distance for these effects (40 minutes). We also found that proximity to sawmills and biomass facilities influenced the location and extent of hazardous fuels treatments that incorporated biomass utilization or were administered through a stewardship contract. Our analysis suggests that to be effective at offsetting some of the costs of hazardous fuels reduction and treat a greater extent of the landscape, policy strategies may need to focus on supporting a network of wood-processing facilities that is distributed across forest-based communities. FOR .S CI. 59(5):566-577.

Technical Management in an Age of Openness: The Political, Public, and Environmental Forest Ranger

Modern bureaucracy faces trade-offs between public and congressional input and agency expertise. The U.S. Forest Service offers an opportunity to quantitatively analyze whether an agency that is required to be more open to the public and congressional input will be forced to ignore its technical expertise in managing resources. This study uses data on 83,000 hazardous fuels reduction activities conducted by the Forest Service from 2001 to 2011. Although the results show that managers are responsive to public and congressional considerations, this has not prevented them from utilizing their technical knowledge to restore lands most deviated from natural conditions. This suggests that managers can balance responsiveness to public and political principals with technically sound management.

Understory plant community responses to hazardous fuels reduction treatments in pinyon-juniper woodlands of Arizona, USA

Although hazardous fuels reduction projects are being implemented widely in dry forests of the western United States, information concerning ecological responses of pinyon-juniper woodlands to fuels treatments is minimal. In this study we used a randomized block experimental design to investigate effects of fuels treatments on understory responses at a pinyon-juniper woodland site in northern Arizona. Treatment alternatives replicated (n=12) on 1-ha units across the 760-ha site were thinning from below (Thin), prescribed burning, (Burn), thinning followed by prescribed burning (Thin+Burn), and untreated controls (Control). We measured cover of vascular plant species, biological soil crust, and forest floor substrate prior to treatment and one year, 2years, and five years post-treatment. After five years, Thin and Thin+Burn plots showed statistically similar total plant cover but both showed significantly greater cover than Burn and Control plots. Cover increases on Thin+Burn plots were driven mainly by annual forb and nonnative species groups. Graminoid species with the C4 photosynthetic pathway showed significantly greater cover in all treatment groups compared with Control plots. Burning alone tended to reduce shrub cover whereas thinning alone tended to increase shrub cover. We found no significant effects of treatment on cover of biological soil crust or bare soil. Regression analysis showed significant negative relationships between total understory plant cover and overstory canopy cover on burned and unburned plots. We found no significant effect of treatment on species richness over the measurement period. We observed 124 taxa in total, and mean richness ranged from 31.8 to 36.8 species per 500m2 in 2011. Similar to results for plant cover, we found significantly greater numbers of annual forb species in Thin+Burn compared with Control plots and significantly greater numbers of nonnative species in Thin+Burn compared with all other treatment groups. Permutational multivariate analysis of variance showed no significant differences in overall plant community composition among treatments. These results indicate that fuel reduction treatments on woodland sites may not dramatically affect understory abundance or composition within five years. Although treatments did not significantly differ in cover of biological soil crust or bare soil – indicators of ecosystem function – our results showed that thinning treatments followed by prescribed fire led to increases in cover of nonnative plant species.

Woody Biomass Use Trends, Barriers, and Strategies: Perspectives of US Forest Service Managers

The use of woody biomass is being promoted across the United States as a means of increasing energy independence, mitigating climate change, and reducing the cost of hazardous fuels reduction treatments and forest restoration projects. The opportunities and challenges for woody biomass use on the national forest system are unique. In addition to making woody biomass usage pencil out, national forest managers must also navigate substantial public engagement and forest planning processes that add to the complexity of fostering woody biomass use opportunities on the national forest system. We report on the results of a survey of US Forest Service managers and staff members (n = 339) about the trends in, barriers to, and strategies for fostering woody biomass use on national forests and their surrounding communities. The results highlight the economic and market challenges as well as the need for a basket of policies focused on a broad array of strategies for biomass use.

Is Wildfire Policy in the United States Sustainable?

Beginning in 2000, wildfire policy in the United States shifted from focusing almost exclusively on suppression to embracing multiple goals, including hazardous fuels reduction, ecosystem restoration and community assistance. Mutually reinforcing, these policy goals have the potential to result in an ecologically, socially and economically sustainable wildfire policy that can mitigate the long-term risk of wildfire for human and ecological communities alike. Six years into this new policy, we evaluate the evidence to determine how well the multiple goals are being served. We conclude that suppression and hazardous fuels reduction receive greater attention and resources relative to ecosystem restoration and community assistance. This provides an incomplete solution to mitigating the long-term risk of wildfire, thereby running the risk of perpetuating it.

A Case for Increasing Forest Biomass Utilization Research in Colorado

Abstract Colorado's forests are being squeezed by two intense, seemingly relentless, and largely antagonistic forces. The first force is the increasing pressure from within the forest due to dense, overgrown stands. The second force is the increasing pressures from increasing human populationsexogenous to the forests. One way to improve forest health and reduce risks to humans at the same time is to remove materials in the form of forest biomass from the forest through hazardous fuels reduction projects. Forest biomass can be used in a variety of products, but because of low profitmargins, forest biomass is used for energy purposes only when no other product is possible. However, because of recent policy enactments, energy uses are becoming more attractive. These recent policy enactments are briefly discussed. Then, potential forest biomass uses are considered, includingelectricity generation, thermal applications, and the production of second-generation liquid biofuels. Recommendations are made for uses that stand the best chance of restoring forest health, reducing fire risk to homes, providing a renewable alternative to fossil fuels, and reducing the costsof doing so to taxpayers.

Interpreting federal policy at the local level: the wildland - urban interface concept in wildfire protection planning in the eastern United States

In 2003, the Healthy Forests Restoration Act (HFRA) called for USA communities at risk of wildfire to develop Community Wildfire Protection Plans (CWPPs) requiring local, state and federal actors to work together to address hazardous fuels reduction and mitigation efforts. CWPPs can provide the opportunity for local government to influence actions on adjacent public land, by establishing local boundaries of the wildland–urban interface (WUI), the area where urban lands meet or intermix with wildlands. The present paper explores local response to the HFRA and CWPPs in the eastern USA, specifically if and how communities are using the policy incentive to identify the WUI. We conducted document reviews of eastern CWPPs, as well as qualitative analysis of in-depth interviews with participants in four case studies. We found tremendous variation in local response to HFRA, with plans completed at multiple scales and using different planning templates. The WUI policy incentive was not used in all CWPPs, suggesting that the incentive is not as useful in the eastern USA, where public land is less dominant and the perceived fire risk is lower than in the West. Even so, many communities in the East completed CWPPs to improve their wildfire preparedness.

A comparison of fire hazard mitigation alternatives in pinyon–juniper woodlands of Arizona

Concern over uncontrollable wildfire in pinyon–juniper woodlands has led public land managers in the southwestern United States to seek approaches for mitigating wildfire hazard, yet little information is available concerning effectiveness and ecological responses of alternative treatments. We established a randomized block experiment at a pinyon–juniper site in northern Arizona and tested effects of no treatment (Control), thinning only (Thin), prescribed fire only (Burn), and thinning followed by prescribed fire (Thin + Burn) on overstory structure, hazardous fuels reduction, and woody understory responses. One year after implementation, mean trees per hectare (TPH) of Utah juniper ( Juniperus osteosperma) and pinyon pine ( Pinus edulis), and basal area (BA) of pinyon, were significantly ( P < 0.05) less in Thin and Thin + Burn treatments than Control. Additionally, pinyon TPH was less in Burn than Control. Quadratic mean diameter was significantly greater in Thin and Thin + Burn than in Control and Burn treatments. Thinning shifted diameter distributions from uneven- to even-sized. Crown fuel load (CFL) of both pinyon and juniper was significantly lower in Thin and Thin + Burn compared with Control and Burn treatments. Thin, Burn, and Thin + Burn treatments resulted in significantly greater 1-h surface fuel loads compared with the Control. The Thin treatment resulted in significantly greater mean load of the 1000-h fuel class compared with Burn and Control treatments, but did not differ from Thin + Burn. Forest floor Oi (litter) layer was not significantly affected by the treatments but Oe + Oa (duff) depth was significantly less in the Burn treatment compared with Thin and Control. Live shrubs and tree regeneration showed no differences among treatments. We concluded that thinning and thinning followed by prescribed fire were effective approaches for fuels reduction; however, resulting stand structures may be novel and outside the historical range of variability. Prescribed fire alone had minimal effects on structure and fuels reduction. Woody shrubs and tree regeneration in the understory suggested that these treatments may not have long-term deleterious ecological effects.

Thinning, burning, and thin-burn fuel treatment effects on soil properties in a Sierra Nevada mixed-conifer forest

More than a century of fire exclusion and past timber management practices in many Sierra Nevada mixed-conifer forests have led to increased stand densities and fuel accumulation, with a corresponding risk of large, high severity wildfires. To reduce hazardous fuel accumulations and restore the health and natural processes of forest ecosystems, fuel management programs often employ thinning and prescribed fire treatments, both alone and in combination. We evaluated forest floor and mineral soil chemical and physical characteristics following these treatments in a managed Sierra Nevada mixed-conifer forest using a fully replicated study design with four separate treatments: THIN, BURN, THIN + BURN, and an untreated CONTROL. Compared to the CONTROL, the BURN and THIN + BURN treatments consumed a large amount of the forest floor, reducing the mass and depth by more than 80%. These treatments reduced the forest floor C and N pools by more than 85%, resulting in reductions of 25 Mg C ha −1 and more than 700 kg N ha −1 from the forest floor. Despite these large losses from the organic horizons, no significant differences in mineral soil total C and N pools were detected among treatments. Compared with the CONTROL and THIN treatments, the BURN and THIN + BURN significantly increased the mineral soil NO 3-N concentration, pool of inorganic N, pH, and exposed bare soil. The THIN + BURN treatment significantly increased the concentrations of NH 4-N and exchangeable Ca relative to the CONTROL. No significant differences in the net rates of nitrification, N mineralization, or bulk density were detected among the four treatments. The BURN treatment reduced mineral soil C concentration and CEC, while the THIN + BURN treatment had the greatest increase in inorganic N. Fire effects on soil pH and inorganic N were moderated in skid trails due to reduced fuel continuity and consumption. In light of the current management emphasis on hazardous fuels reduction, we recommend that researchers investigating fire effects in harvested stands include skid trail influences in their study design.

Is Wildfire Policy in the United States Sustainable?

Abstract Beginning in 2000, wildfire policy in the United States shifted from focusing almost exclusively on suppression to embracing multiple goals, including hazardous fuels reduction, ecosystem restoration, and community assistance. Mutually reinforcing, these policy goals have the potential to result in an ecologically, socially, and economically sustainable wildfire policy that can mitigate the long-term risk of wildfires for human and ecological communities alike. Six years into this new policy, we evaluate the evidence to determine how well the multiple goals are being served. We conclude that suppression and hazardous fuels reduction receive greater attention and resources relative to ecosystem restoration and community assistance. This provides an incomplete solution to mitigating the long-term risk of wildfire, thereby running the risk of perpetuating it.

A process for modeling short- and long-term risk in the southern Oregon Cascades

Evaluating tradeoffs between the short- and long-term risks of different management scenarios in fire prone ecosystems is crucial to implementation of the National Fire Plan and the Healthy Forest Restoration Act (H.R. 1904). We demonstrate a process for conducting these relative risk assessments using models and data generally available via the public domain. Our risk assessment process integrates information about the ecological characteristics of the landscape, vegetation dynamics as related to different management scenarios, and fire modeling, to generate inputs for effects analyses on water temperature, peak flows, landslides, and northern spotted owls ( Strix occidentalis caurina). The process is demonstrated for current management with owl foraging emphasis and no management scenarios in a 325,000 ha landscape in southwestern Oregon. The current management with owl foraging emphasis scenario represents a reasonable portrayal of current land management policies and allocations with an emphasis on providing spotted owl foraging habitat across the landscape. The no management scenario portrays only vegetation dynamics as projected by a growth and yield model. Results from both management scenarios were subjected to fire and effects modeling. Simulation results indicated that risk metrics used in this demonstration were sensitive to the manner in which we described and attributed the landscape and our model formulations and thus, were useful measures for relative risk assessments. Model simulations demonstrated that the potential for uncharacteristic fire increased five-fold within the first 20 years under both management scenarios. The area burned by crown fire and uncharacteristic fire also increased over time for both management scenarios. Both management scenarios resulted in a decline of spotted owl habitat, with the current management with owl foraging emphasis scenario creating more unfavorable conditions. We attribute the relatively high long-term risk of the current management with owl foraging emphasis scenario to a combination of the large-scale passive management approach instituted on a substantial portion of the landscape (approximately 55% of the assessment area), the presence of plantation-based forestry (approximately 22% of the area), and by default, the limited opportunity to implement hazardous fuels reduction at a scale large enough to influence landscape-level fuel patterns. These preliminary results suggest that a spatially explicit, more aggressive hazardous fuels reduction management scenario, that may conflict with current land management policies and allocations, is needed to reduce the continuity of hazardous fuels and sustain healthy forest conditions and spotted owl habitat.