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Using A Plot Transect Method To Determine The Historical Fire Regime For The Montane Forests Of Boulder Colorado
Download Using A Plot Transect Method To Determine The Historical Fire Regime For The Montane Forests Of Boulder Colorado full books in PDF, epub, and Kindle. Read online Using A Plot Transect Method To Determine The Historical Fire Regime For The Montane Forests Of Boulder Colorado ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Using a Plot-transect Method to Determine the Historical Fire Regime for the Montane Forests of Boulder, Colorado by : Leda Nikola Kobziar
Download or read book Using a Plot-transect Method to Determine the Historical Fire Regime for the Montane Forests of Boulder, Colorado written by Leda Nikola Kobziar and published by . This book was released on 2000 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Historical Fire Regimes in Ponderosa Pine Forests of the Colorado Front Range, and Recommendations for Ecological Restoration and Fuels Management by : Merrill R. Kaufmann
Download or read book Historical Fire Regimes in Ponderosa Pine Forests of the Colorado Front Range, and Recommendations for Ecological Restoration and Fuels Management written by Merrill R. Kaufmann and published by . This book was released on 2007 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Method for Determining Fire History in Coniferous Forests of the Mountain West by : Stephen F. Arno
Download or read book A Method for Determining Fire History in Coniferous Forests of the Mountain West written by Stephen F. Arno and published by . This book was released on 1977 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes a method for determining historic fire frequency, intensity, and size from cross sections collected from fire-scarred trees and tree age classes determined through increment borings. Tells how to interpret the influence of fire in stand composition and structure and how to identify effects of modern fire suppression.
Book Synopsis Fire History and Pattern in a Cascade Range Landscape by : Peter H. Morrison
Download or read book Fire History and Pattern in a Cascade Range Landscape written by Peter H. Morrison and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hayman Fire Case Study written by and published by . This book was released on 2003 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2002 much of the Front Range of the Rocky Mountains in Colorado was rich in dry vegetation as a result of fire exclusion and the droughty conditions that prevailed in recent years. These dry and heavy fuel loadings were continuous along the South Platte River corridor located between Denver and Colorado Springs on the Front Range. These topographic and fuel conditions combined with a dry and windy weather system centered over eastern Washington to produce ideal burning conditions. The start of the Hayman Fire was timed and located perfectly to take advantage of these conditions resulting in a wildfire run in 1 day of over 60,000 acres and finally impacting over 138,000 acres. The Hayman Fire Case Study, involving more than 60 scientists and professionals from throughout the United States, examined how the fire behaved, the effects of fuel treatments on burn severity, the emissions produced, the ecological (for example, soil, vegetation, animals) effects, the home destruction, postfire rehabilitation activities, and the social and economic issues surrounding the Hayman Fire. The Hayman Fire Case Study revealed much about wildfires and their interactions with both the social and natural environments. As the largest fire in Colorado history it had a profound impact both locally and nationally. The findings of this study will inform both private and public decisions on the management of natural resources and how individuals, communities, and organizations can prepare for wildfire events.
Book Synopsis Fire Ecology and Historical Fire Occurrence in the Forest and Range Ecosystems of Colorado by : Martin E. Alexander
Download or read book Fire Ecology and Historical Fire Occurrence in the Forest and Range Ecosystems of Colorado written by Martin E. Alexander and published by . This book was released on 1976 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Crossdated Fire Histories (1650 to 1900) from Ponderosa Pine-dominated Forests of Idaho and Western Montana [recurso Electrn̤ico] by : Emily K. Heyerdahl
Download or read book Crossdated Fire Histories (1650 to 1900) from Ponderosa Pine-dominated Forests of Idaho and Western Montana [recurso Electrn̤ico] written by Emily K. Heyerdahl and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For a broader study of the climate drivers of regional-fire years in the Northern Rockies, we reconstructed a history of surface fires at 21 sites in Idaho and western Montana. We targeted sites that historically sustained frequent surface fires and were dominated or codominated by ponderosa pine (Pinus ponderosa P. & C. Lawson). Our objective is to report the site-specific fire and site information we did not report in our regional study that might be useful to local land managers for determining such things as Fire Regime Condition Class. We include 23 sites--20 from our regional study (one was reported elsewhere) and another three sampled in the region for other purposes. We crossdated samples from 640 trees to obtain calendar years for each tree ring and hence for 9,691 fire scars. For each site, we report the chronology of surface fires, properties of the fire regime (mean fire interval and intra-ring position of fire scars), and forest type, as well as topography that might be used to extrapolate site-specific fire regimes to unsampled areas.
Book Synopsis A Method for Determining Fire History in Coniferous Forests of the Mountain West by : Stephen F. Arno
Download or read book A Method for Determining Fire History in Coniferous Forests of the Mountain West written by Stephen F. Arno and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Fire History Workshop, October 20-24, 1980, Tucson, Arizona by :
Download or read book Proceedings of the Fire History Workshop, October 20-24, 1980, Tucson, Arizona written by and published by . This book was released on 1980 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the workshop was to exchange information on sampling procedures, research methodologies, preparation and interpretation of specimen material, terminology, and the application and significance of findings, emphasizing the relationship of dendrochronology procedures to fire history interpretations.
Book Synopsis Fire Management in the American West by : Mark Hudson
Download or read book Fire Management in the American West written by Mark Hudson and published by University Press of Colorado. This book was released on 2011-11-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most journalists and academics attribute the rise of wildfires in the western United States to the USDA Forest Service's successful fire-elimination policies of the twentieth century. However, in Fire Management in the American West, Mark Hudson argues that although a century of suppression did indeed increase the hazard of wildfire, the responsibility does not lie with the USFS alone. The roots are found in the Forest Service's relationships with other, more powerful elements of society--the timber industry in particular. Drawing on correspondence both between and within the Forest Service and the major timber industry associations, newspaper articles, articles from industry outlets, and policy documents from the late 1800s through the present, Hudson shows how the US forest industry, under the constraint of profitability, pushed the USFS away from private industry regulation and toward fire exclusion, eventually changing national forest policy into little more than fire policy. More recently, the USFS has attempted to move beyond the policy of complete fire suppression. Interviews with public land managers in the Pacific Northwest shed light on the sources of the agency's struggles as it attempts to change the way we understand and relate to fire in the West. Fire Management in the American West will be of great interest to environmentalists, sociologists, fire managers, scientists, and academics and students in environmental history and forestry.
Book Synopsis Historical Fire Regimes and Structures of Douglas-fir Forests in the Centennial Valley of Southwest Montana by : Nathan T. Korb
Download or read book Historical Fire Regimes and Structures of Douglas-fir Forests in the Centennial Valley of Southwest Montana written by Nathan T. Korb and published by . This book was released on 2005 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fire Episodes in the Inland Northwest (1540-1940) Based on Fire History Data by : Stephen W. Barrett
Download or read book Fire Episodes in the Inland Northwest (1540-1940) Based on Fire History Data written by Stephen W. Barrett and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of Topographic Variation in Stand Structure and Composition of Sierra Nevada Forests Under an Active Fire Regime by : Jamie Marilyn Lydersen
Download or read book Determination of Topographic Variation in Stand Structure and Composition of Sierra Nevada Forests Under an Active Fire Regime written by Jamie Marilyn Lydersen and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Management efforts to promote forest resiliency as climate changes have often used historical forest conditions to provide general guidance for fuels reduction and forest restoration treatments. However, it has been difficult to identify what stand conditions might be fire and drought resilient because historical data and reconstruction studies are generally limited to accurate estimates only of large, live tree density and composition. Other stand features such as smaller tree densities, dead wood, understory conditions, regeneration and fuel loads have been difficult to quantify, estimate how they may vary across a landscape, or assess how they would be affected by fire under current climate conditions. We sampled old-growth, mixed-conifer forests with at least two low-intensity fires within the last 65 years in 150 plots at 48 sample sites ranging over 400 km of the Sierra Nevada. Recent fire history had the strongest influence on understory conditions with small tree density decreasing and shrub cover increasing with the increased intensity and frequency of fire associated with upper slope and ridge-top locations. In contrast, stand structures associated with large, overstory trees such as total basal area, canopy cover, and the abundance of large snags and logs increased in topographic locations associated with more mesic, productive sites regardless of fire history. Our results suggest that topography, fire history and their interaction affect forest conditions by directly influencing fire intensity, and indirectly by differences in productivity, leading to heterogeneous forest conditions across a landscape.
Book Synopsis Late Holocene Fire and Climate History of the Western San Juan Mountains, Colorado: Results from Alluvial Stratigraphy and Tree-ring Methods by : Erica Renee Bigio
Download or read book Late Holocene Fire and Climate History of the Western San Juan Mountains, Colorado: Results from Alluvial Stratigraphy and Tree-ring Methods written by Erica Renee Bigio and published by . This book was released on 2013 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past few decades, wildfires have increased in size and severity in the Southwest and across the western US. These recent trends in fire behavior are a drastic change in arid, ponderosa pine and mixed conifer forests of the Southwest compared with tree-ring records of fire history for the past ̃400 years. This study presents a late Holocene record (̃3,000 years) of fire history and related changes in fire regimes with climate variability over annual to multi-decadal time scales. Tree-ring and alluvial-sediment sampling sites were paired in four small, tributary basins located in the western San Juan Mountains of Colorado. In our study sites, tree-ring records show that fire return intervals were longer and fire behavior was more severe on the north-facing slopes with relatively dense mixed conifer stands. Increased fire barriers and steep topography decreased the fire frequency and extent relative to gentle terrain elsewhere in the range and leading to a lack of synchrony among fire years in different parts of the study area. The alluvial-sediment record showed four peaks in high-severity fire activity over the past 3,000 years ranging between 200 - 400 years in length. The timing of peaks coincided with decadal-length drought episodes and were often preceded by multiple decades of above average winter precipitation. The sampling of alluvial-sediment and tree-ring data allowed for site-level comparisons between recent alluvial deposits and specific fire years interpreted from the tree-ring records. We found good correspondence between the type of fire-related sediment deposit (i.e. geomorphic response) in the alluvial record and the extent of mixed and high-severity fire estimated from the tree-ring record, and the correspondence was well-supported by the debris flow probability model results. The two paleofire data tend to represent particular components of the historical fire regime, with alluvial-sediments biased towards infrequent, high-severity events during recent millennia, and the tree-ring record biased toward lower severity fires during recent centuries. The combined analyses of different paleofire proxy types in the same study sites, therefore, can enhance and expand our understanding of fire and climate history beyond what is possible with either proxy alone.
Book Synopsis Variability in Historical Fire Patterns of a Moist Mixed-Conifer Forest in the Northern Blue Mountains of Oregon by :
Download or read book Variability in Historical Fire Patterns of a Moist Mixed-Conifer Forest in the Northern Blue Mountains of Oregon written by and published by . This book was released on 2020 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: High variability in historical fire patterns characteristic to mixed-severity fire regimes is expected to have contributed to a structurally heterogeneous landscape throughout much of the forested ecosystems of the western United States. After more than a hundred years of fire exclusion in the region, many forests have shifted to a more homogeneous structure, which raises concern regarding these forests' ability to sustain expected increases in fire activity with a warming climate. The shift is not uniform across the west, however, and differences in historical disturbance patterns and changes due to land management are not well characterized in forests across a wide range of environmental settings. While there is broad agreement on the high (low) impact of fire exclusion on the structure and composition of low (high) elevation, dry (wet) forests in the west, much less is known about its effect in mid elevation, moist mixed-conifer forests. In order to provide reference conditions of wildfire patterns, this study reconstructs the variability in historical fire occurrence and severity and tree establishment in a moist mixed-conifer forest in northeastern Oregon's Blue Mountains. We used a novel multi-proxy approach, combining remote sensing, dendroecology, and mathematical models to comprehensively sample and reconstruct multi-century fire frequency and severity, and forest structural patterns. Based on over 550 tree-core and 100 fire-scar samples collected at 38 plots, we quantified historical fire severity and assessed the spatial heterogeneity of disturbance and establishment patterns across 9,300 ha in two subwatersheds. We identified high variability in historical fire patterns over fine scales between forest stands. Despite speculation that moist mixed-conifer forests experienced primarily infrequent and severe fires, relatively frequent fire (median intervals ranging from 14-42 years) of all severities (low, medium and high) at fine scales was common throughout the study area, with an abrupt decrease in fire activity after 1900. Concurrent post-fire establishment pulses of both shade-intolerant and shade-tolerant species were common, suggesting an initial floristics vegetation succession model. The results of this study highlight the complexity of the mixed-severity fire regime, long-term challenges and untested assumptions of post-fire responses of shade-tolerant species, as well as assumed infrequent fire activity in moist mixed-conifer forests, and thus can help inform discussions around appropriate restoration of fire-excluded, moist mixed-conifer forests of the northern Blue Mountains Ecoregion.
Book Synopsis Historic Fire Regimes on Eastern Great Basin (USA) Mountains Reconstructed from Tree Rings by : Stanley G. Kitchen
Download or read book Historic Fire Regimes on Eastern Great Basin (USA) Mountains Reconstructed from Tree Rings written by Stanley G. Kitchen and published by . This book was released on 2010 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management of natural landscapes requires knowledge of key disturbance processes and their effects. Fire and forest histories provide valuable insight into how fire and vegetation varied and interacted in the past. I constructed multi-century fire chronologies for 10 sites on six mountain ranges representative of the eastern Great Basin (USA), a region in which historic fire information was lacking. I also constructed tree recruitment chronologies for two sites. I use these chronologies to address three research foci. First, using fire-scar data from four heterogeneous sites, I assert that mean fire interval (MFI) values calculated from composite chronologies provide suitable estimates of point MFI (PMFI) when sample area size is =1/2 ha. I also suggest that MFI values for single trees can be used to estimate PMFI after applying a correction factor. Next, I infer climate effects on regional fire patterns using 10 site chronologies and tree-ring-based indices of drought and of El Niǫ Southern Oscillation (ENSO) and Pacific Decadal Oscillation ([PDO), Pacific Ocean surface temperature variability known to affect North American climate. Regional fire years (> or =33% of recording sites) were synchronized by wet-dry cycles where the probability of occurrence was highest in the first year of drought following a wet phase and lowest when climate conditions transitioned from dry to wet. Regional fire probability was highest when ENSO and PDO were negative (Southwest pattern). Local fire years occurred under a broad range of conditions. Fire seasonality was bimodal with early and late-season fires dominant. I imply that Native American burning practices were responsible for differences in historic and modern fire seasonality. Lastly, I assess fire regime and tree recruitment variability within two fire-sheds. PMFI varied more than 10-fold within each site. A mixed-severity regime was dominant. A majority (>60%) of fires were small (
Book Synopsis Fire Regimes and Successional Dynamics of Pine and Oak Forests in the Central Appalachian Mountains by : Serena Rose Aldrich
Download or read book Fire Regimes and Successional Dynamics of Pine and Oak Forests in the Central Appalachian Mountains written by Serena Rose Aldrich and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of fire in determining the structure and composition of many forested ecosystems is well documented (e.g. North American boreal forests; piñon-juniper woodlands of the western US). Fire is also believed to be important in temperate forests of eastern North America, but the processes acting here are less clear, particularly in xerophytic forests dominated by yellow pine (Pinus, subgenus Diploxylon Koehne) and oak (Quercus L.). In this study, I use dendroecological techniques to investigate fire history and vegetation dynamics of mixed pine-oak forests in the central Appalachian Mountains of Virginia. The study addresses three objectives: (1) develop a lengthy fire chronology to document fire history beginning in the late presettlement era and extending throughout the period of European settlement, industrialization and modern fire exclusion; (2) explore fire-climate relationships; and (3) investigate vegetation dynamics in relation to fire occurrence. The study was conducted on three study sites within the George Washington National Forest. I used fire-scarred cross-sections from yellow pine trees to document fire history. Fire-climate relationships were investigated for each study site individually and all sites combined using superposed epoch analysis (SEA). Fire-history information was coupled with dendroecological data on age structure to explore stand development in relation to fire occurrence. Results of fire history analysis reveal a long history of frequent fire with little temporal variation despite changes in land use history. Mean fire intervals (MFI) ranged from 3.7-17.4 years. The most important change in the fire regime was the initiation of fire suppression in the early twentieth century. Results of SEA show that periodic droughts may be important drivers of fire activity. Drought the year of fire was important at two of the three study sites and when all sites were combined. Results of age structure indicate that vegetation development was clearly influenced by fire. Frequent burning maintained populations of yellow pine throughout the period of study until fire suppression allowed fire-sensitive hardwood trees and shrubs to establish. It is clear from this study that continued fire suppression will likely result in fire-tolerant pines and oaks being replaced by more mesophytic trees and shrubs.
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