Empirical Support for the Use of Prescribed Burning as a Fuel Treatment

Prescribed burning as a fuel treatment seeks to moderate wildfire impacts and decreases the areal extent of wildfires by increasing the effectiveness of fire suppression. Assessment of prescribed burning effectiveness is frequently anecdotal or based on simulation. This paper examines recent observational evidence of prescribed fire effectiveness. The spread rate and intensity of experimental fires in distinct fuel types have been shown to increase with time since treatment (fuel age) following fuel structure recovery. Prescribed fire constrains the size and especially the severity of individual fires, even under extremely severe weather conditions. At larger spatial and temporal scales of analysis, the effect of fuel age on unplanned fire severity is also evident, whether it comes from wildfires entering treated areas or from wildfires in fuel-reduced areas resulting from earlier wildfire occurrences. The persistence of these effects is variable, depending on vegetation type and productivity. The long-term reduction in wildfire area brought about by prescribed fire can be difficult to ascertain. Substantial effort (annual treatment rates >5 % of the landscape) has been shown to effectively control the extent of wildfires in forests, with 3–4 units of prescribed burning needed to reduce wildfire by one unit. Future studies should consider the decrease in area burned by high-severity fire as a more meaningful and objective measure of prescribed fire effectiveness than the decrease in wildfire area and should strive to document fire behaviour in treated versus untreated areas during wildfires.

[1]  B. W. Wilgen.  Fire management in species‐rich Cape fynbos shrublands , 2013 .

[2]  P. Fernandes,et al.  Fine fuels consumption and CO2 emissions from surface fire experiments in maritime pine stands in northern Portugal , 2013 .

[3]  Alexandra D. Syphard,et al.  Comparing the role of fuel breaks across southern California national forests , 2011 .

[4]  R. Bradstock,et al.  The efficacy of fuel treatment in mitigating property loss during wildfires: Insights from analysis of the severity of the catastrophic fires in 2009 in Victoria, Australia. , 2012, Journal of environmental management.

[5]  R. Bradstock.  A biogeographic model of fire regimes in Australia: current and future implications , 2010 .

[6]  R. Bradstock,et al.  The impact of antecedent fire area on burned area in southern California coastal ecosystems. , 2012, Journal of environmental management.

[7]  P. Fernandes,et al.  Global patterns in fire leverage: the response of annual area burnt to previous fire , 2015 .

[8]  Martin E. Alexander,et al.  Fire on Earth: An Introduction , 2014 .

[9]  James S. Gould,et al.  Changes in behaviour of fire in dry eucalypt forest as fuel increases with age , 2012 .

[10]  Jay D. Miller,et al.  Differences in wildfires among ecoregions and land management agencies in the Sierra Nevada region, California, USA , 2012 .

[11]  M. ReidAngela,et al.  Predicting litter and live herb fuel consumption during prescribed fires in native and old-field upland pine communities of the southeastern United States , 2012 .

[12]  W.R. Anderson,et al.  Fire behaviour modelling in semi-arid mallee-heath shrublands of southern Australia , 2013, Environ. Model. Softw..

[13]  Paulo M. Fernandes,et al.  A review of prescribed burning effectiveness in fire hazard reduction , 2003 .

[14]  A. Latimer,et al.  Fuel treatment effectiveness in California yellow pine and mixed conifer forests , 2012 .

[15]  Miguel G. Cruz,et al.  Uncertainty associated with model predictions of surface and crown fire rates of spread , 2013, Environ. Model. Softw..

[16]  James S. Gould,et al.  Quantifying fine fuel dynamics and structure in dry eucalypt forest (Eucalyptus marginata) in Western Australia for fire management , 2011 .

[17]  Stuart Matthews,et al.  Behind the flaming zone: Predicting woody fuel consumption in eucalypt forest fires in southern Australia , 2011 .

[18]  Jon E. Keeley,et al.  The 2007 Southern California Wildfires: Lessons in Complexity , 2009 .

[19]  Carol Miller,et al.  Previous Fires Moderate Burn Severity of Subsequent Wildland Fires in Two Large Western US Wilderness Areas , 2013, Ecosystems.

[20]  A. S. Meador,et al.  Effectiveness of fuel reduction treatments: Assessing metrics of forest resiliency and wildfire severity after the Wallow Fire, AZ , 2014 .

[21]  Matthias M. Boer,et al.  Long-term impacts of prescribed burning on regional extent and incidence of wildfires : evidence from 50 years of active fire management in SW Australian forests , 2009 .

[22]  Francisco Rego,et al.  Empirical modelling of surface fire behaviour in maritime pine stands , 2009 .

[23]  B. W. Wilgen,et al.  Fire management in Mediterranean‐climate shrublands: a case study from the Cape fynbos, South Africa , 2010 .

[24]  N. Burrows,et al.  Prescribed burning in southwestern Australian forests , 2013 .

[25]  M. E. Alexander,et al.  Using Modeled Surface and Crown Fire Behavior Characteristics to Evaluate Fuel Treatment Effectiveness: A Caution , 2014 .

[26]  Carol Miller,et al.  Wildland fire as a self-regulating mechanism: the role of previous burns and weather in limiting fire progression. , 2015, Ecological applications : a publication of the Ecological Society of America.

[27]  D. Driscoll,et al.  Land Management Practices Associated with House Loss in Wildfires , 2012, PloS one.

[28]  M. C. Kennedy,et al.  Fuel treatments and landform modify landscape patterns of burn severity in an extreme fire event. , 2014, Ecological applications : a publication of the Ecological Society of America.

[29]  O. Price,et al.  The influence of prescribed fire on the extent of wildfire in savanna landscapes of western Arnhem Land, Australia , 2012 .

[30]  P. Fernandes.  Examining fuel treatment longevity through experimental and simulated surface fire behaviour: a maritime pine case study. , 2009 .

[31]  J. Morgan Varner,et al.  Prescribed fire in North American forests and woodlands: history, current practice, and challenges , 2013 .

[32]  Michael C. Wimberly,et al.  Estimation of wildfire size and risk changes due to fuels treatments , 2012 .

[33]  Lloyd P. Queen,et al.  Characterizing Fire-on-Fire Interactions in Three Large Wilderness Areas , 2012 .

[34]  R. Bradstock,et al.  Quantifying the influence of fuel age and weather on the annual extent of unplanned fires in the Sydney region of Australia , 2011 .

[35]  R. Ottmar.  Wildland fire emissions, carbon, and climate: Modeling fuel consumption , 2014 .

[36]  Fire behaviour during the Pickering Brook wildfire, January 2005 (Perth Hills Fires 71-80). , 2010 .

[37]  S. W. Maier,et al.  Role of weather and fuel in stopping fire spread in tropical savannas , 2014 .

[38]  J. S. Gould,et al.  Predicting fire behaviour in dry eucalypt forest in southern Australia , 2012 .

[39]  D. Butry.  Fighting fire with fire: estimating the efficacy of wildfire mitigation programs using propensity scores , 2009, Environmental and Ecological Statistics.

[40]  F. Moreira,et al.  Prescribed burning in southern Europe: developing fire management in a dynamic landscape , 2013 .

[41]  Maggi Kelly,et al.  Interactions Among Wildland Fires in a Long-Established Sierra Nevada Natural Fire Area , 2009, Ecosystems.

[42]  Philip N. Omi,et al.  Fuel treatments and fire severity: A meta-analysis , 2013 .

[43]  R. Bliege Bird,et al.  Aboriginal hunting buffers climate-driven fire-size variability in Australia’s spinifex grasslands , 2012, Proceedings of the National Academy of Sciences.

[44]  Michael C Wimberly,et al.  Assessing fuel treatment effectiveness using satellite imagery and spatial statistics. , 2009, Ecological applications : a publication of the Ecological Society of America.

[45]  Woodam Chung,et al.  Optimizing Fuel Treatments to Reduce Wildland Fire Risk , 2015, Current Forestry Reports.

[46]  Amr H. Abd-Elrahman,et al.  Modeling Relationships among 217 Fires Using Remote Sensing of Burn Severity in Southern Pine Forests , 2011, Remote. Sens..

[47]  Paulo M. Fernandes,et al.  Fuel age, weather and burn probability in Portugal , 2012 .

[48]  Jan W. van Wagtendonk,et al.  Factors Associated with the Severity of Intersecting Fires in Yosemite National Park, California, USA , 2012 .

[49]  M. Elgar,et al.  Fighting Fire with Fire: Does a Policy of Broad-Scale Prescribed Burning Improve Community Safety? , 2014 .

[50]  Paulo M. Fernandes,et al.  Application note: PiroPinus: A spreadsheet application to guide prescribed burning operations in maritime pine forest , 2012 .

[51]  Craig Loehle,et al.  Applying landscape principles to fire hazard reduction , 2004 .

[52]  Andrew J. Bannister,et al.  Anatomy of a catastrophic wildfire: The Black Saturday Kilmore East fire in Victoria, Australia , 2012 .

[53]  Upscaling the estimation of surface-fire rate of spread in maritime pine (Pinus pinaster Ait.) forest , 2014 .

[54]  W. Mccaw,et al.  Scale‐dependent thresholds in the dominant controls of wildfire size in semi‐arid southwest Australia , 2014 .

[55]  Sandra L. Haire,et al.  Wilderness shapes contemporary fire size distributions across landscapes of the western United States , 2013 .

[56]  Mark A. Adams,et al.  Mega-fires, inquiries and politics in the eucalypt forests of Victoria, south-eastern Australia , 2013 .

[57]  W. Mccaw.  Managing forest fuels using prescribed fire – A perspective from southern Australia , 2013 .

[58]  Susan J. Prichard,et al.  Fuel treatments reduce the severity of wildfire effects in dry mixed conifer forest, Washington, USA , 2010 .

[59]  P. Fernandes.  Fire-smart management of forest landscapes in the Mediterranean basin under global change , 2013 .

[60]  Gwilym Matthew Davies,et al.  Rate of spread of fires in Calluna vulgaris-dominated moorlands. , 2009 .

[61]  David S. Pilliod,et al.  Pattern and process of prescribed fires influence effectiveness at reducing wildfire severity in dry coniferous forests , 2012 .

[62]  Scott L. Goodrick,et al.  Introduction to prescribed fires in Southern ecosystems , 2012 .

[63]  C. S. Wright.  Models for Predicting Fuel Consumption in Sagebrush-Dominated Ecosystems , 2013 .

[64]  M. Cruz,et al.  A generic, empirical-based model for predicting rate of fire spread in shrublands , 2015 .

[65]  Brandon M. Collins,et al.  Severity of an uncharacteristically large wildfire, the Rim Fire, in forests with relatively restored frequent fire regimes , 2014 .

[66]  A. Gill,et al.  Learning to coexist with wildfire , 2014, Nature.

[67]  A. Edwards,et al.  Managing fire regimes in north Australian savannas: applying Aboriginal approaches to contemporary global problems , 2013 .

[68]  J. Pausas,et al.  The global fire–productivity relationship , 2013 .

[69]  Adrián Regos,et al.  Using Unplanned Fires to Help Suppressing Future Large Fires in Mediterranean Forests , 2014, PloS one.

[70]  Maureen C. Kennedy,et al.  Fuel treatment effects on tree mortality following wildfire in dry mixed conifer forests, Washington State, USA , 2012 .

[71]  Alex Hall,et al.  Spatial variation in extreme winds predicts large wildfire locations in chaparral ecosystems , 2010 .

[72]  A. Latimer,et al.  Wildfire-contingent effects of fuel treatments can promote ecological resilience in seasonally dry conifer forests , 2014 .

[73]  Miguel G. Cruz,et al.  Assessing crown fire potential in coniferous forests of western North America: a critique of current approaches and recent simulation studies. , 2010 .

[74]  João Claro,et al.  Forest fire management to avoid unintended consequences: a case study of Portugal using system dynamics. , 2013, Journal of environmental management.

[75]  R. Bradstock,et al.  The effect of fuel age on the spread of fire in sclerophyll forest in the Sydney region of Australia , 2010 .

[76]  O. Price.  The drivers of effectiveness of prescribed fire treatment , 2012 .