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Articles 61 - 90 of 104
Full-Text Articles in Life Sciences
Laboratory Of Tree-Ring Research And School Of Natural Resources And The Environment, Thomas W. Swetnam, Donald Falk, Elaine K. Sutherland, Peter M. Brown, Timothy J. Brown
Laboratory Of Tree-Ring Research And School Of Natural Resources And The Environment, Thomas W. Swetnam, Donald Falk, Elaine K. Sutherland, Peter M. Brown, Timothy J. Brown
JFSP Research Project Reports
Understanding the role of climate variation in governing fire regimes remains one of the central needs in contemporary fire science and management. Ideally, this understanding should encompass both historical and current fire-climatology, and inform both basic science and ecosystem management. In this project, Fire and Climate Synthesis (FACS) we undertook a detailed synthesis of both paleofire and modern fire based on compilations of existing data sets. We also analyzed three major thematic pathways by which climate has impacted fire policy, including direct and indirect climate effects on fire policy. Paleofire. We assembled the largest and most comprehensive data set of …
Fire Regimes Of Montane Grasslands Of The Valles Caldera National Preserve, New Mexico, Donald A. Falk, Craig D. Allen, Robert Parmenter, Thomas Swetnam, Clifford Dils
Fire Regimes Of Montane Grasslands Of The Valles Caldera National Preserve, New Mexico, Donald A. Falk, Craig D. Allen, Robert Parmenter, Thomas Swetnam, Clifford Dils
JFSP Research Project Reports
Montane grasslands are an important ecosystem type in Southwestern landscapes, occurring from the forest borders of piñon-juniper woodland to high elevation subalpine and alpine ecosystems. Thus, they often represent a mosaic element embedded in the forest landscape matrix, playing key roles in processing water and nutrients, and providing habitat for unique suites of species, often at higher levels of diversity than those found in surrounding uplands. Soils, local temperature and moisture gradients, and disturbance all play roles in determining the distribution and extent of montane grasslands. Of these factors, fire plays the most dynamic role in regulating the location and …
Synthesis Of Knowledge Of Extreme Fire Behavior: Volume I For Fire Managers, Paul A. Werth, Brian E. Potter, Craig B. Clements, Mark. A. Finney, Scott L. Goodrick, Martin E. Alexander, Miguel G. Cruz, Jason A. Forthofer, Sara S. Mcallister
Synthesis Of Knowledge Of Extreme Fire Behavior: Volume I For Fire Managers, Paul A. Werth, Brian E. Potter, Craig B. Clements, Mark. A. Finney, Scott L. Goodrick, Martin E. Alexander, Miguel G. Cruz, Jason A. Forthofer, Sara S. Mcallister
JFSP Research Project Reports
The National Wildfire Coordinating Group definition of extreme fire behavior (EFB) indicates a level of fire behavior characteristics that ordinarily precludes methods of direct control action. One or more of the following is usually involved: high rate of spread, prolific crowning/ spotting, presence of fire whirls, and strong convection column. Predictability is difficult because such fires often exercise some degree of influence on their environment and behave erratically, sometimes dangerously. Alternate terms include “blow up” and “fire storm.” Fire managers examining fires over the last 100 years have come to understand many of the factors necessary for EFB development. This …
Fuel Reduction Treatment Longevity And Crown Response In Interior Ponderosa Pine Forests Of Northern California, Martin W. Ritchie, Carl N. Skinner, Jianwei Zhang
Fuel Reduction Treatment Longevity And Crown Response In Interior Ponderosa Pine Forests Of Northern California, Martin W. Ritchie, Carl N. Skinner, Jianwei Zhang
JFSP Research Project Reports
With increasing interest in fuels treatments to address the high risk of severe fires in the western United States, there is an attendant need to quantify the effectiveness of such treatments. In addition to the immediate effect of reducing levels of combustible material and the attendant impact on fire intensity, resource managers also need to quantify or forecast the longevity of such treatments. Treatments that produce significant, but short-lived reductions in risk of severe wildfire may not be meeting the goals and objectives of managers. This temporal component needs further study and is the subject of this proposal. There are …
Fuel Treatments In Mixed-Pine Forests In The Great Lakes Region: A Comprehensive Guide To Planning And Implementation, Eric Toman, Stanley Gehrt, Charles Goebel, David M. Hix, Roger Williams, Robyn Wilson, Sarah Mccaffrey
Fuel Treatments In Mixed-Pine Forests In The Great Lakes Region: A Comprehensive Guide To Planning And Implementation, Eric Toman, Stanley Gehrt, Charles Goebel, David M. Hix, Roger Williams, Robyn Wilson, Sarah Mccaffrey
JFSP Research Project Reports
Fuel management decisions are made within a larger context of resource management characterized by multiple objectives including ecosystem restoration, wildlife management, commodity production (from timber to less traditional forest products), and provision of recreation opportunities and amenity values. Implementation of fuel treatments is strongly influenced by their perceived influence on and compatibility with overarching management objectives. In some cases these objectives may be complementary while in others they may involve difficult tradeoffs. Such tradeoffs are only further complicated by institutional mandates, limited availability of information, and complex ownership patterns. Like natural resource managers across the U.S., those in the Great …
Structuring Expert Input For A Knowledge-Based Approach To Watershed Condition Assessment For The Northwest Forest Plan, Usa, Sean N. Gordon, Kirsten Gallo
Structuring Expert Input For A Knowledge-Based Approach To Watershed Condition Assessment For The Northwest Forest Plan, Usa, Sean N. Gordon, Kirsten Gallo
Institute for Sustainable Solutions Publications and Presentations
Assessments of watershed condition for aquatic and riparian species often have to rely on expert opinion because of the complexity of establishing statistical relationships among the many factors involved. Such expert-based assessments can be difficult to document and apply consistently over time and space. We describe and reflect on the process of developing a computer-based decision support application from expert judgments for assessing aquatic and riparian conditions over the 100,000 km2 managed by the US federal government under the Northwest Forest Plan. The decision support system helped structure and document the assessment process and provided consistency and transparency to the …
Potential Carbon Storage And Cost-Benefits Analysis Of A Small-Scale Community Reforestation Project, Chester County, Pennsylvania, Jason D. Ferrell
Potential Carbon Storage And Cost-Benefits Analysis Of A Small-Scale Community Reforestation Project, Chester County, Pennsylvania, Jason D. Ferrell
East Goshen Township Forest Restoration Project Documents
No abstract provided.
Improved Understanding Of Climate-Fi Re Relationships Along North America’S Pacifi C Coast, Marjie Brown
Improved Understanding Of Climate-Fi Re Relationships Along North America’S Pacifi C Coast, Marjie Brown
Joint Fire Science Program Briefs (2007-2012)
This research expanded our understanding of the climate/wildfi re relationship by identifying major climate controls and translating them into a practical tool, still under development, that managers can use for planning. The focus was on fi reclimate interactions from southern Oregon to Baja California, with emphasis placed on the infl uence of the Pacifi c North American (PNA) climate pattern. Researchers identifi ed and delineated differences in the way fi re activity responded to climate variability on a regional scale with the intent to improve fi re season forecasts along the Pacifi c coast. Strong correlations were found between certain …
Rising Temperatures Trigger Ecological Changes In The Boreal Forest Of Alaska, Shari Anstedt
Rising Temperatures Trigger Ecological Changes In The Boreal Forest Of Alaska, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
Fundamentally different from the rest of the forest types in the United States, Alaska’s boreal forest covers a signifi cant amount of acreage in an increasingly variable climate. With its high latitude location, predictions reveal that this region will be the first to experience the effects of global climate change. In fact, natives of this region are already dealing with warmer temperatures and a changing landscape. As a result, researchers conducted a study to help gather more information about this area and to better understand the effects of climate change and how those effects influence fire and fuels management. An …
Mastication On Red Mountain: Investigating Fuel Loads And Fire Effects, Shari Anstedt
Mastication On Red Mountain: Investigating Fuel Loads And Fire Effects, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
Although complete fire exclusion is a thing of the past in the Sierra Nevada, fire and fuel managers must still contend with dense forests and higher fuel loads that have built up over time. Controlled fire is a helpful fuel reduction method, but it can be tricky to manage, especially in an area with excessive fuels, or in plantations with trees having smaller diameters and lower crowns, which are more susceptible to heat damage. Mastication can also be a useful fuel treatment and has become a popular alternative, but includes its own set of drawbacks and uncertainties. Since little research …
Assessing Post-Fire Treatment Effects And Burn Severity On The Sandy Loam Soils Of Oregon, Shari Anstedt
Assessing Post-Fire Treatment Effects And Burn Severity On The Sandy Loam Soils Of Oregon, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
Fire helps reduce dead and accumulated vegetation and enriches the soil by releasing nutrients bound in litter. But when fuel loads are too high and wildfi res burn too hot, problems may arise. A perfect example of this is the 2003 Booth and Bear Butte (B&B) fire in central Oregon, which consumed more than 90,000 acres of mixed conifer forest. On the surface, the effects on trees and vegetation seemed obvious, but what about the wildfi re effects on what we don’t see? How do post-fi re management activities support or impede forest recovery? Furthermore, how were the soils, and …
Ok-Fire: Weather-Based Decision Support For Wildland Fire Management, Shari Anstedt
Ok-Fire: Weather-Based Decision Support For Wildland Fire Management, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
There’s a lot of wildland in Oklahoma—and as a result, a lot of potential for fire. To help prepare for wildfire and perform fi re management activities, land managers previously used weather, fire danger, and smoke management products provided by the Oklahoma Mesonet, the state’s automated weather station network. But unfortunately, the products were not easily found or easy to use, and very little user training was provided. Fire managers also expressed the need for multi-day forecasting capabilities to help anticipate periods of high fire danger and severe wildfi re conditions and to improve pre-burn planning and management. These critical …
Fire History Study Reveals Surprises About Mixed-Pine Ecology In Eastern Upper Michigan, Joy Drohan
Fire History Study Reveals Surprises About Mixed-Pine Ecology In Eastern Upper Michigan, Joy Drohan
Joint Fire Science Program Briefs (2007-2012)
Mixed red and white pine forests in eastern Upper Michigan saw frequent fires, about every 50–60 years, before Euro-American settlement. Post-settlement, the fire cycle has lengthened and forest composition has shifted to include more jack pine and fi re-sensitive deciduous trees, increasing fuel loadings and changing wildlife habitat along the way. In cooperation with researchers and land managers at Seney National Wildlife Refuge, researchers at The Ohio State University are working out details of combining mechanical treatments with prescribed fire to restore mixed-pine forests dominated by red and white pine. In particular, their findings about red pine ecology could change …
Assessing Mechanical Mastication And Thinning-Piling-Burning Treatments On The Pinyon-Juniper Woodlands Of Southwestern Colorado, Shari Anstedt
Assessing Mechanical Mastication And Thinning-Piling-Burning Treatments On The Pinyon-Juniper Woodlands Of Southwestern Colorado, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
New knowledge of fire regimes in the pinyon-juniper woodlands of the interior western United States has altered management views. Once known as being at low wildfire risk, these woodlands are now at a higher risk for severe wildfires because of high tree densities exacerbated by ongoing drought and region-wide bark beetle (Ips confusus) infestation. To help reduce fuels and fi re hazards and to create defensible space in the wildland urban interface, regional land managers have conducted thinning-piling-burning treatments. Recently, however, a different treatment has been used—mechanical mastication. Although mechanical mastication is typically more cost effective, there is concern about …
Following The Smoke Trail, Jake Delwiche
Following The Smoke Trail, Jake Delwiche
Joint Fire Science Program Briefs (2007-2012)
Public land administrators and air quality managers need better information on the potential contribution of wildland fires vs. anthropogenic sources on possible exceedances of air quality standards. To obtain more precise information in California, a composite network was established for monitoring ozone (O3), nitrogen dioxide (NO2), ammonia (NH3), gaseous nitric acid (HNO3) and particulate matter (PM). The network was located in the Sierra Nevada region of central California. The network provided data for estimates of distribution of air pollutants from urban and agricultural activities, and measured contributions of area wildland fi res on ground levels of pollutants. Information was also …
Fish And Forest Management: Not Necessarily At Odds, Joy Drohan
Fish And Forest Management: Not Necessarily At Odds, Joy Drohan
Joint Fire Science Program Briefs (2007-2012)
Resource managers of lands harboring sensitive aquatic species face tough choices. They could manage forests to reduce their wildfire potential, while possibly harming the sensitive species habitat, or they could leave forests untreated for wildfire, risking an uncharacteristic fire that may drastically alter critical aquatic species habitat. This study sought to develop a decision support framework to help managers understand the potential impacts of fire and resulting disturbances, such as debris flows, in this puzzle. The resulting fish population persistence model, Integrating Forests, Fish, and Fire (IF3), relies on existing geographic information system (GIS) data to discern where human impacts …
Can Archeology Survive A Fire?, Jake Delwiche
Can Archeology Survive A Fire?, Jake Delwiche
Joint Fire Science Program Briefs (2007-2012)
Most public lands include not only natural resource values, but also signifi cant cultural resources from both historic and prehistoric occupation. In some cases, the cultural resources are the reason for establishment of a park or monument. Responsibilities of the managers of these lands include protecting these cultural resources and balancing their protection with protection of the natural resources. This is essential to having a good understanding of the potential effect of fire— whether a prescribed fire or a wildfire—on the cultural resources. A recent scientifi c project funded by the Joint Fire Science Program studied the potential impact of …
Saving The Cypress: Restoring Fire To Rare, At-Risk Species, Christina Frame
Saving The Cypress: Restoring Fire To Rare, At-Risk Species, Christina Frame
Joint Fire Science Program Briefs (2007-2012)
Many populations of Baker and Macnab cypress are dying without signs of regeneration. The Forest Service is currently implementing controlled burning across a range of vegetation types in northern California, but because there is little information about how such treatments will affect rare, endemic plant communities, cypress stands have been excluded from such treatments. However, these fire-adapted species cannot survive extended periods of fire exclusion. To effectively manage the cypress and prevent further decline of the species, land managers need information on factors that promote cypress regeneration. The objectives of this study were to (1) determine if fire is indeed …
Evaluating Bark Beetle And Wildfi Re Dynamics In The Greater Yellowstone Ecosystem, Shari Anstedt
Evaluating Bark Beetle And Wildfi Re Dynamics In The Greater Yellowstone Ecosystem, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
In the western United States, bark beetle outbreaks are at a record high—and of grave concern to forest managers and other stakeholders. There is a common belief that the high amounts of dead fuels produced by bark beetle infestations increase the chance of active crown fires. However, little is known about how bark beetle outbreaks and wildfire interact, and how that interaction influences the overall ecosystem structure and potential fi re behavior. To better understand bark beetle/wildfire dynamics, a study was conducted in beetle-infested areas of the Greater Yellowstone Ecosystem (GYE) in northwestern Wyoming and adjacent portions of Montana and …
A Project In Two Parts: Developing Fire Histories For The Eastern U.S. And Creating A Climate-Based Continental Fire Frequency Model To Fill Data Gaps, Christina Frame
A Project In Two Parts: Developing Fire Histories For The Eastern U.S. And Creating A Climate-Based Continental Fire Frequency Model To Fill Data Gaps, Christina Frame
Joint Fire Science Program Briefs (2007-2012)
Tree-ring dated fire scars provide long-term records of fire frequency, giving land managers valuable baseline information about the fire regimes that existed prior to Euro-American settlement. However, for the East, fire history data prove diffi cult to acquire because the generally moister climate of the region causes rapid decay of wood. In an endeavor to fill data gaps, the research team collected fire scar data in the states of Alabama, Louisiana, Kentucky, Tennessee, Iowa, Wisconsin, and Michigan. The second part of the project used this newly collected fi re history data combined with previously collected records to parameterize and calibrate …
Reducing Fuels Through Mulching Treatments: What Are The Ecological Effects?, Christina Frame
Reducing Fuels Through Mulching Treatments: What Are The Ecological Effects?, Christina Frame
Joint Fire Science Program Briefs (2007-2012)
Many areas in the western U.S. are being thinned to reduce fire hazard and spread. Often the most economical solution for the disposal of the thinned biomass is to grind and leave the material onsite. These treatments are assumed to reduce the ability of the forest to carry a crown fire, but the effects of the added material on forest ecosystems are poorly known because such treatments do not have a natural analogue. Managers and the public are interested in understanding the impacts of the addition of this woody material on forest ecosystems so they can evaluate the benefi ts …
Ponderosa Pine Biomass Relationships Vary With Site Treatment And Site Productivity, Joy Drohan
Ponderosa Pine Biomass Relationships Vary With Site Treatment And Site Productivity, Joy Drohan
Joint Fire Science Program Briefs (2007-2012)
Allometric equations, which express biomass as a function of tree size, are often used to estimate the amount of fuel in a site’s canopy. Most managers assume that one allometric equation per species is suffi cient, or that any error introduced by extrapolation is irrelevant. This work showed, however, that the allometric biomass relationship for ponderosa pine likely changes over space and time. The researchers concluded that for maximum accuracy, allometric equations for ponderosa pine should account for stand management history and site productivity. Thinned trees replaced their foliage within about 4 years, and 8–10 years post-thinning, growth had stabilized. …
Modifying The Model To Mitigate Crown Fire: Improving Estimates Of Canopy Fuels For The Black Hills (And Beyond), Christina Frame
Modifying The Model To Mitigate Crown Fire: Improving Estimates Of Canopy Fuels For The Black Hills (And Beyond), Christina Frame
Joint Fire Science Program Briefs (2007-2012)
Managers of most coniferous forests in the western United States aim to create and maintain forest structures that are less susceptible to the initiation and spread of crown fire. To achieve this end, they use models that predict potential fire behavior, and these models rely on accurate estimates of canopy structure, including canopy base height (CBH) and canopy bulk density (CBD). Managers predict CBD through use of the Fire and Fuels Extension to the Forest Vegetation Simulator (FFE-FVS). However, the equations used by FFE-FVS to predict crown mass are based on estimates solely from northern Montana and Idaho, and therefore …
Woodpecker Habitat After The Fire, Jake Delwiche
Woodpecker Habitat After The Fire, Jake Delwiche
Joint Fire Science Program Briefs (2007-2012)
Public land managers are asked to minimize fuel levels after fires, including using techniques such as salvage logging. They are also responsible for maintaining suitable wildlife habitat, especially for species of concern to state and federal agencies. An area where these responsibilities could conflict is in the use of salvage logging in burned-over areas that also represent good habitat for certain wildlife such as woodpeckers. Controversy over this conflict has led to litigation. Public land management agencies need consistent design criteria to maintain suitable habitats for these birds. Little information has existed on how to assess potential effects of postfire …
Post-Fi Re Logging: An Effective Tool For Managing Future Fuels In Coniferous Inland Northwest Forests, Joy Drohan
Post-Fi Re Logging: An Effective Tool For Managing Future Fuels In Coniferous Inland Northwest Forests, Joy Drohan
Joint Fire Science Program Briefs (2007-2012)
This study involved a chronosequence of 68 stand-replacing wildfires that happened between 1970 and 2007 in dry coniferous forests of eastern Washington and Oregon. The authors compared snag decay and surface fuel accumulation with and without post-fire logging. Without logging after a fire, woody fuels accumulate for 15–30 years because the rate of fuel deposition on the ground is greater than the rate of wood decay. Stands that were more dense prefire have greater accumulations of fuel. Predominant tree species and size influenced rates of fuel deposition and snag decay. Thin trees fell before larger trees and ponderosa pines typically …
Fire Helps The Lonesome Pine, Jake Delwiche
Fire Helps The Lonesome Pine, Jake Delwiche
Joint Fire Science Program Briefs (2007-2012)
Regeneration of Table Mountain pines in the Southern Appalachian has been on the decline since the 1950s. From central Pennsylvania to northeast Georgia, stands of these pines are beginning to be dominated by oaks, particularly chestnut oak, and by hickories. It has been believed that this is because the shade-intolerant pines are being replaced by more shade tolerant hardwoods and shrubs, largely a result of fire exclusion in these areas. Few studies have evaluated fire as a tool for replacement of this species. Some prescriptions have called for intense crown fi res, but these narrow the burning window and cause …
Evaluating The Effects And Effectiveness Of Post-Fire Seeding Treatments In Western Forests, Shari Anstedt
Evaluating The Effects And Effectiveness Of Post-Fire Seeding Treatments In Western Forests, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
High-severity wildfires can profoundly affect soils and plant communities, thus requiring emergency rehabilitation treatments such as post-fire seeding. Intended to stabilize soils, reduce erosion, and combat non-native species invasions, post-fire seeding is typically one of the first treatments used by most U.S. natural resource agencies. But despite its widespread use, there is still doubt about the treatment’s actual effectiveness and ecological impacts. Therefore, researchers conducted a study to gain more definitive insight on the ecological effects and usefulness of post-fire seeding. The first part of the study involved an evidence-based review of scientifi c articles, theses, and government publications to …
Optimizing The Location Of Fuel Treatments Over Time At Landscape Scales, Shari Anstedt
Optimizing The Location Of Fuel Treatments Over Time At Landscape Scales, Shari Anstedt
Joint Fire Science Program Briefs (2007-2012)
Fuel treatments are a vital part of forest management—but when faced with limited budgets, narrow burning windows, and air quality restrictions, it can be challenging to prioritize where, when, and how fuel treatments should be applied across the landscape to achieve the most benefit. To help ease this process, land managers can turn to various standalone models, capabilities, and decision support systems. While these tools address various aspects of fuel treatments, there is no one integrated solution that can provide the combined functionality needed to handle the strategic scheduling of fuel treatments, the spatial and temporal changes of fuel treatment …
Synthesis Of Knowledge Of Extreme Fire Behavior: Volume I For Fire Managers, Paul A. Werth, Brian E. Potter, Craig B. Clements, Mark A. Finney, Jason A. Forthofer, Sara S. Mcallister, Scott L. Goodrick, Martin E. Alexander, Miguel G. Cruz
Synthesis Of Knowledge Of Extreme Fire Behavior: Volume I For Fire Managers, Paul A. Werth, Brian E. Potter, Craig B. Clements, Mark A. Finney, Jason A. Forthofer, Sara S. Mcallister, Scott L. Goodrick, Martin E. Alexander, Miguel G. Cruz
Joint Fire Science Program Synthesis Reports
The National Wildfire Coordinating Group definition of extreme fire behavior (EFB) indicates a level of fire behavior characteristics that ordinarily precludes methods of direct control action. One or more of the following is usually involved: high rate of spread, prolific crowning/ spotting, presence of fire whirls, and strong convection column. Predictability is difficult because such fires often exercise some degree of influence on their environment and behave erratically, sometimes dangerously. Alternate terms include “blow up” and “fire storm.” Fire managers examining fires over the last 100 years have come to understand many of the factors necessary for EFB development. This …
Comprehensive Fuels Treatment Practices Guide For Mixed Conifer Forests: California, Central And Southern Rockies, And The Southwest, A. M. Evans, R. G. Everett, S. L. Stephens, J. A. Youlz
Comprehensive Fuels Treatment Practices Guide For Mixed Conifer Forests: California, Central And Southern Rockies, And The Southwest, A. M. Evans, R. G. Everett, S. L. Stephens, J. A. Youlz
Joint Fire Science Program Synthesis Reports
The goal of this guide is to provide a resource for managers of mixed conifer forests of the Southwestern plateaus and uplands, the Central and Southern Rocky Mountains, the Sierra Nevada, and the Transverse and Peninsular Ranges in Southern California. Mixed conifer forests have different species, structures, and spatial patterns in these regions but, in general, we focus on forests with a mix of ponderosa or Jeffrey pine, Douglas-fir, true firs, and aspen. The guide includes a comprehensive review of historic conditions, past land use, natural fire regimes, impacts of altered fire regimes, and future prospects, given climate change, for …