Register      Login
International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire
RESEARCH ARTICLE

Improved laboratory method to test flammability metrics of live plants under dynamic conditions and future implications

Timothy S. Miller A B , Alexander I. Filkov https://orcid.org/0000-0001-5927-9083 A C * and Trent D. Penman https://orcid.org/0000-0002-5203-9818 A
+ Author Affiliations
- Author Affiliations

A School of Ecosystem and Forest Sciences, The University of Melbourne, 4 Water Street, Creswick, Vic. 3363, Australia.

B Department of Environment, Land, Water and Planning, 8 Nicholson Street, East Melbourne Vic. 3002, Australia.

C Bushfire and Natural Hazards Cooperative Research Centre (CRC), Melbourne, Vic. 3002, Australia.

* Correspondence to: alexander.filkov@unimelb.edu.au

International Journal of Wildland Fire 32(2) 277-295 https://doi.org/10.1071/WF21172
Submitted: 26 January 2021  Accepted: 28 October 2022   Published: 16 November 2022

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of IAWF.

Abstract

The role of live vegetation fuel properties in altering fire behaviour is increasingly being recognised. The techniques utilised to assess how fuel characteristics impact fire behaviour, however, use apparatuses that do not accurately represent the exposure of plants to fire. This study presents a replicable and precise laboratory method of testing flammability metrics in live vegetation, particularly Acacia floribunda, Cassinia arcuata and Pinus radiata. Two heating regimes were tested – a static heat flux to reflect current methods and a dynamic (increasing) heat flux to more accurately replicate an approaching fire front. Piloted ignition and autoignition were used for both heating regimes to test the effect of different ignition mechanisms on flammability metrics. The pilot igniter increased the number of samples that reached flaming ignition, and decreased the time and energy required to reach all flammability metrics. Significant differences were observed between heating regimes, suggesting it is important to test flammability of live plants under a dynamic heating regime that most accurately replicates an approaching fire front. Adoption of this methodology is recommended to ensure more realistic and standardised data on flammability of individual plant species and plant communities. This will lead to better-informed and more accurate wildfire behaviour modelling.

Keywords: consumption, dynamic heat flux, flame, flammability, ignition method, ignition time, plant traits, radiation, standardised method.


References

Akaike H (1973) Information theory as an extension of the maximum likelihood principle. In ‘Second International Symposium on Information Theory.’ Tsakadsor, Armenia, 2–8 September 1971’. (Eds BN Petrov, F Csaki) pp.267–281. (Akademiai Kiado: Budapest)

Alam MA, Wyse SV, Buckley HL, Perry GLW, Sullivan JJ, Mason NWH, Buxton R, Richardson SJ, Curran TJ (2020) Shoot flammability is decoupled from leaf flammability, but controlled by leaf functional traits. Journal of Ecology 108, 641–653.
Shoot flammability is decoupled from leaf flammability, but controlled by leaf functional traits.Crossref | GoogleScholarGoogle Scholar |

Alexander ME, Cruz MG (2012) Interdependencies between flame length and fireline intensity in predicting crown fire initiation and crown scorch height. International Journal of Wildland Fire 21, 95–113.
Interdependencies between flame length and fireline intensity in predicting crown fire initiation and crown scorch height.Crossref | GoogleScholarGoogle Scholar |

Anderson HE (1970) Forest fuel ignitibility. Fire Technology 6, 312–319.
Forest fuel ignitibility.Crossref | GoogleScholarGoogle Scholar |

Babrauskas V (2002) Ignition of wood: a review of the state of the art. Journal of Fire Protection Engineering 12, 163–189.
Ignition of wood: a review of the state of the art.Crossref | GoogleScholarGoogle Scholar |

Bartlett AI, Hadden RM, Bisby LA (2019) A review of factors affecting the burning behaviour of wood for application to tall timber construction. Fire Technology 55, 1–49.
A review of factors affecting the burning behaviour of wood for application to tall timber construction.Crossref | GoogleScholarGoogle Scholar |

Benjamin DJ, Berger JO (2019) Three recommendations for improving the use of P-values. The American Statistician 73, 186–191.
Three recommendations for improving the use of P-values.Crossref | GoogleScholarGoogle Scholar |

Bilbao R, Mastral JF, Lana JA, Ceamanos J, Aldea ME, Betrán M (2002) A model for the prediction of the thermal degradation and ignition of wood under constant and variable heat flux. Journal of Analytical and Applied Pyrolysis 62, 63–82.
A model for the prediction of the thermal degradation and ignition of wood under constant and variable heat flux.Crossref | GoogleScholarGoogle Scholar |

Bradstock RA (2010) A biogeographic model of fire regimes in Australia: Current and future implications. Global Ecology and Biogeography 19, 145–158.
A biogeographic model of fire regimes in Australia: Current and future implications.Crossref | GoogleScholarGoogle Scholar |

Burnham KP, Anderson DR (2002) ‘Model Selection and Multimodel Inference: A Practical Information-Theoretic Approach.’ (Springer: New York)

Burton JE, Cawson JG, Filkov AI, Penman TD (2021) Leaf traits predict global patterns in the structure and flammability of forest litter beds. Journal of Ecology 109, 1344–1355.
Leaf traits predict global patterns in the structure and flammability of forest litter beds.Crossref | GoogleScholarGoogle Scholar |

Cardoso AW, Oliveras I, Abernethy KA, Jeffery KJ, Lehmann D, Edzang Ndong J, McGregor I, Belcher CM, Bond WJ, Malhi YS (2018) Grass species flammability, not biomass, drives changes in fire behavior at tropical forest–savanna transitions. Frontiers in Forests and Global Change 1, 6
Grass species flammability, not biomass, drives changes in fire behavior at tropical forest–savanna transitions.Crossref | GoogleScholarGoogle Scholar |

Caton SE, Hakes RSP, Gorham DJ, Zhou A, Gollner MJ (2016) Review of pathways for building fire spread in the wildland urban interface Part I: Exposure conditions. Fire Technology 53, 429–473.
Review of pathways for building fire spread in the wildland urban interface Part I: Exposure conditions.Crossref | GoogleScholarGoogle Scholar |

Chen Y, Aanjaneya K, Atreya A (2017) A study to investigate pyrolysis of wood particles of various shapes and sizes. Fire Safety Journal 91, 820–827.
A study to investigate pyrolysis of wood particles of various shapes and sizes.Crossref | GoogleScholarGoogle Scholar |

Cheney NP, Gould JS, McCaw WL, Anderson WR (2012) Predicting fire behaviour in dry eucalypt forest in southern Australia. Forest Ecology and Management 280, 120–131.
Predicting fire behaviour in dry eucalypt forest in southern Australia.Crossref | GoogleScholarGoogle Scholar |

Cruz MG, Sullivan AL, Gould JS, Sims NC, Bannister AJ, Hollis JJ, Hurley RJ (2012) Anatomy of a catastrophic wildfire: The Black Saturday Kilmore East fire in Victoria, Australia. Forest Ecology and Management 284, 269–285.
Anatomy of a catastrophic wildfire: The Black Saturday Kilmore East fire in Victoria, Australia.Crossref | GoogleScholarGoogle Scholar |

Cruz MG, Cheney NP, Gould JS, McCaw WL, Kilinc M, Sullivan AL (2022) An empirical-based model for predicting the forward spread rate of wildfires in eucalypt forests. International Journal of Wildland Fire 31, 81–95.
An empirical-based model for predicting the forward spread rate of wildfires in eucalypt forests.Crossref | GoogleScholarGoogle Scholar |

Dahanayake KC, Chow CL (2018) Moisture content, ignitability, and fire risk of vegetation in vertical greenery systems. Fire Ecology 14, 125–142.
Moisture content, ignitability, and fire risk of vegetation in vertical greenery systems.Crossref | GoogleScholarGoogle Scholar |

Dai J, Delichatsios MA, Yang L, Zhang J (2013) Piloted ignition and extinction for solid fuels. Proceedings of the Combustion Institute 34, 2487–2495.
Piloted ignition and extinction for solid fuels.Crossref | GoogleScholarGoogle Scholar |

Dent J, Buckley H, Lustig A, Curran T (2019) Flame temperatures saturate with increasing dead material in Ulex europaeus, but flame duration, fuel consumption and overall flammability continue to increase. Fire 2, 6
Flame temperatures saturate with increasing dead material in Ulex europaeus, but flame duration, fuel consumption and overall flammability continue to increase.Crossref | GoogleScholarGoogle Scholar |

Dewhirst RA, Smirnoff N, Belcher CM (2020) Pine Species that support crown fire regimes have lower leaf-level terpene contents than those native to surface fire regimes. Fire 3, 17
Pine Species that support crown fire regimes have lower leaf-level terpene contents than those native to surface fire regimes.Crossref | GoogleScholarGoogle Scholar |

DiDomizio MJ, Mulherin P, Weckman EJ (2016) Ignition of wood under time-varying radiant exposures. Fire Safety Journal 82, 131–144.
Ignition of wood under time-varying radiant exposures.Crossref | GoogleScholarGoogle Scholar |

Dimitrakopoulos AP (2001) A statistical classification of Mediterranean species based on their flammability components. International Journal of Wildland Fire 10, 113–118.
A statistical classification of Mediterranean species based on their flammability components.Crossref | GoogleScholarGoogle Scholar |

Dimitrakopoulos AP, Papaioannou KK (2001) Flammability assessment of Mediterranean forest fuels. Fire Technology 37, 143–152.
Flammability assessment of Mediterranean forest fuels.Crossref | GoogleScholarGoogle Scholar |

Fateh T, Richard F, Batiot B, Rogaume T, Luche J, Zaida J (2016) Characterization of the burning behavior and gaseous emissions of pine needles in a cone calorimeter – FTIR apparatus. Fire Safety Journal 82, 91–100.
Characterization of the burning behavior and gaseous emissions of pine needles in a cone calorimeter – FTIR apparatus.Crossref | GoogleScholarGoogle Scholar |

Fernandes PM, Cruz MG (2012) Plant flammability experiments offer limited insight into vegetation–fire dynamics interactions. New Phytologist 194, 606–609.
Plant flammability experiments offer limited insight into vegetation–fire dynamics interactions.Crossref | GoogleScholarGoogle Scholar |

Finney MA, Cohen JD, Forthofer JM, McAllister SS, Gollner MJ, Gorham DJ, Saito K, Akafuah NK, Adam BA, English JD (2015) Role of buoyant flame dynamics in wildfire spread. Proceedings of the National Academy of Sciences 112, 9833–9838.
Role of buoyant flame dynamics in wildfire spread.Crossref | GoogleScholarGoogle Scholar |

Fonda R, Varner J (2005) Burning characteristics of cones from eight pine species. Northwest Science 78, 322–333.

Fonda RW (2001) Burning characteristics of needles from eight pine species. Forest Science 47, 390–396.
Burning characteristics of needles from eight pine species.Crossref | GoogleScholarGoogle Scholar |

Ganteaume A, Jappiot M, Lampin C, Guijarro M, Hernando C (2013) Flammability of some ornamental species in wildland–urban interfaces in southeastern France: Laboratory assessment at particle level. Environmental Management 52, 467–480.
Flammability of some ornamental species in wildland–urban interfaces in southeastern France: Laboratory assessment at particle level.Crossref | GoogleScholarGoogle Scholar |

Gill AM, Zylstra P (2005) Flammability of Australian forests. Australian Forestry 68, 87–93.
Flammability of Australian forests.Crossref | GoogleScholarGoogle Scholar |

Gould JS, McCaw WL, Cheney NP, Ellis PF, Knight IK, Sullivan AL (2008) ‘Project Vesta: Fire in Dry Eucalypt Forest: Fuel Structure, Fuel Dynamics and Fire Behaviour.’ (CSIRO Publishing)

Grootemaat S, Wright IJ, van Bodegom PM, Cornelissen JHC (2017) Scaling up flammability from individual leaves to fuel beds. Oikos 126, 1428–1438.
Scaling up flammability from individual leaves to fuel beds.Crossref | GoogleScholarGoogle Scholar |

Hines F, Hines F, Tolhurst KG, Wilson AA, McCarthy GJ (2010) ‘Overall fuel hazard assessment guide.’ (Victorian Government, Department of Sustainability and Environment)

Holtkamp RH (2012) Cassinia spp. – cassinia. In ‘Biological control of weeds in Australia’. (Eds M Julien, R McFadyen, JCullen) pp. 146–149. (CSIRO Publishing: Collingwood)

Jaureguiberry P, Bertone G, Díaz S (2011) Device for the standard measurement of shoot flammability in the field. Austral Ecology 36, 821–829.
Device for the standard measurement of shoot flammability in the field.Crossref | GoogleScholarGoogle Scholar |

Jervis FX, Rein G (2016) Experimental study on the burning behaviour of Pinus halepensis needles using small-scale fire calorimetry of live, aged and dead samples. Fire and Materials 40, 385–395.
Experimental study on the burning behaviour of Pinus halepensis needles using small-scale fire calorimetry of live, aged and dead samples.Crossref | GoogleScholarGoogle Scholar |

Ji J, Cheng Y, Yang L, Guo Z, Fan W (2016) An integral model for wood auto-ignition under variable heat flux. Journal of Fire Sciences 24, 413–425.
An integral model for wood auto-ignition under variable heat flux.Crossref | GoogleScholarGoogle Scholar |

Kane JM, Varner JM, Hiers JK (2008) The burning characteristics of southeastern oaks: Discriminating fire facilitators from fire impeders. Forest Ecology and Management 256, 2039–2045.
The burning characteristics of southeastern oaks: Discriminating fire facilitators from fire impeders.Crossref | GoogleScholarGoogle Scholar |

Kane JM, Varner JM, Saunders MR (2019) Resurrecting the lost flames of American chestnut. Ecosystems 22, 995–1006.
Resurrecting the lost flames of American chestnut.Crossref | GoogleScholarGoogle Scholar |

Kane JM, Kreye JK, Barajas-Ramirez R, Varner JM (2021) Litter trait driven dampening of flammability following deciduous forest community shifts in eastern North America. Forest Ecology and Management 489, 119100
Litter trait driven dampening of flammability following deciduous forest community shifts in eastern North America.Crossref | GoogleScholarGoogle Scholar |

Kreye JK, Varner JM, Hamby GW, Kane JM (2018) Mesophytic litter dampens flammability in fire-excluded pyrophytic oak–hickory woodlands. Ecosphere 9, e02078
Mesophytic litter dampens flammability in fire-excluded pyrophytic oak–hickory woodlands.Crossref | GoogleScholarGoogle Scholar |

Kreye JK, Kane JM, Varner JM, Hiers JK (2020) Radiant heating rapidly increases litter flammability through impacts on fuel moisture. Fire Ecology 16, 8
Radiant heating rapidly increases litter flammability through impacts on fuel moisture.Crossref | GoogleScholarGoogle Scholar |

Kuznetsov VT, Filkov AI, Isaev YN, Guk VO (2015) Ignition of wood subjected to the decreasing radiant energy flux. IOP Conference Series: Materials Science and Engineering 81, 012071
Ignition of wood subjected to the decreasing radiant energy flux.Crossref | GoogleScholarGoogle Scholar |

Liodakis S, Bakirtzis D, Lois E (2002) TG and autoignition studies on forest fuels. Journal of Thermal Analysis and Calorimetry 69, 519–528.
TG and autoignition studies on forest fuels.Crossref | GoogleScholarGoogle Scholar |

Lizhong Y, Zaifu G, Yupeng Z, Weicheng F (2007) The influence of different external heating ways on pyrolysis and spontaneous ignition of some woods. Journal of Analytical and Applied Pyrolysis 78, 40–45.
The influence of different external heating ways on pyrolysis and spontaneous ignition of some woods.Crossref | GoogleScholarGoogle Scholar |

Madrigal J, Hernando C, Guijarro M (2013) A new bench-scale methodology for evaluating the flammability of live forest fuels. Journal of Fire Sciences 31, 131–142.
A new bench-scale methodology for evaluating the flammability of live forest fuels.Crossref | GoogleScholarGoogle Scholar |

Maluk C, Bisby L, Krajcovic M, Torero JL (2019) A Heat-Transfer Rate Inducing System (H-TRIS) Test Method. Fire Safety Journal 105, 307–319.
A Heat-Transfer Rate Inducing System (H-TRIS) Test Method.Crossref | GoogleScholarGoogle Scholar |

Martin RE, Gordon DA, Gutierrez MA, Lee DS, Molina DM, Schroeder RA, Sapsis DB, Stephens SL, Chambers M (1994) Assessing the flammability of domestic and wildland vegetation. In ‘Proceedings of the 12th conference on fire and forest meteorology.’ pp. 130–137. (Society of American Foresters: Bethesda, Maryland)

McAllister S, Weise DR (2017) Effects of season on ignition of live wildland fuels using the forced ignition and flame spread test apparatus. Combustion Science and Technology 189, 231–247.
Effects of season on ignition of live wildland fuels using the forced ignition and flame spread test apparatus.Crossref | GoogleScholarGoogle Scholar |

McAllister S, Grenfell I, Hadlow A, Jolly WM, Finney M, Cohen J (2012) Piloted ignition of live forest fuels. Fire Safety Journal 51, 133–142.
Piloted ignition of live forest fuels.Crossref | GoogleScholarGoogle Scholar |

McArthur, AG (1967) ‘Fire behaviour in eucalypt forest’. Leaflet No. 107. (Australian Forestry and Timber Bureau: Canberra)

Mindykowski P, Fuentes A, Consalvi JL, Porterie B (2011) Piloted ignition of wildland fuels. Fire Safety Journal 46, 34–40.
Piloted ignition of wildland fuels.Crossref | GoogleScholarGoogle Scholar |

Molina JR, Martín T, Silva FRY, Herrera MÁ (2017) The ignition index based on flammability of vegetation improves planning in the wildland–urban interface: A case study in southern Spain. Landscape and Urban Planning 158, 129–138.
The ignition index based on flammability of vegetation improves planning in the wildland–urban interface: A case study in southern Spain.Crossref | GoogleScholarGoogle Scholar |

Morandini F, Santoni PA, Tramoni JB, Mell WE (2019) Experimental investigation of flammability and numerical study of combustion of shrub of rockrose under severe drought conditions. Fire Safety Journal 108, 102836
Experimental investigation of flammability and numerical study of combustion of shrub of rockrose under severe drought conditions.Crossref | GoogleScholarGoogle Scholar |

Morvan D, Frangieh N (2018) Wildland fires behaviour: wind effect versus Byram’s convective number and consequences upon the regime of propagation. International Journal of Wildland Fire 27, 636–641.
Wildland fires behaviour: wind effect versus Byram’s convective number and consequences upon the regime of propagation.Crossref | GoogleScholarGoogle Scholar |

Mueller EV, Skowronski N, Thomas JC, Clark K, Gallagher MR, Hadden R, Mell W, Simeoni A (2018) Local measurements of wildland fire dynamics in a field-scale experiment. Combustion and Flame 194, 452–463.
Local measurements of wildland fire dynamics in a field-scale experiment.Crossref | GoogleScholarGoogle Scholar |

Murray BR, Hardstaff LK, Phillips ML (2013) Differences in leaf flammability, leaf traits and flammability-trait relationships between native and exotic plant species of dry sclerophyll forest. PLoS ONE 8, e79205
Differences in leaf flammability, leaf traits and flammability-trait relationships between native and exotic plant species of dry sclerophyll forest.Crossref | GoogleScholarGoogle Scholar |

Pausas JG, Keeley JE, Schwilk DW (2017) Flammability as an ecological and evolutionary driver. Journal of Ecology 105, 289–297.
Flammability as an ecological and evolutionary driver.Crossref | GoogleScholarGoogle Scholar |

Penman TE, Cawson JG, Murphy S, Duff TJ (2017) Messmate stringybark: bark ignitability and burning sustainability in relation to fragment dimensions, hazard score and time since fire. International Journal of Wildland Fire 26, 866–876.
Messmate stringybark: bark ignitability and burning sustainability in relation to fragment dimensions, hazard score and time since fire.Crossref | GoogleScholarGoogle Scholar |

R Core Team (2019) ‘R: A language and environment for statistical computing.’ (R Foundation for Statistical Computing: Vienna, Austria)

Rejmánek M (1995) What makes a species invasive? In ‘Plant invasions: general aspects and special problems.’ (Eds P Pyšek, K Prach, M Rejmánek, M Wade) pp. 3–13. (SPB Academic Publishing: Amsterdam)

Reszka P, Borowiec P, Steinhaus T, Torero JL (2012) A methodology for the estimation of ignition delay times in forest fire modelling. Combustion and Flame 159, 3652–3657.
A methodology for the estimation of ignition delay times in forest fire modelling.Crossref | GoogleScholarGoogle Scholar |

Rothermel RC (1972) A mathematical model for predicting fire spread in wildland fuels. USDA Forest Service, Intermountain Forest and Range Experiment Station, Research Paper INT-RP-115. (Ogden, UT)

Scarff FR, Westoby M (2006) Leaf litter flammability in some semi‐arid Australian woodlands. Functional Ecology 20, 745–752.
Leaf litter flammability in some semi‐arid Australian woodlands.Crossref | GoogleScholarGoogle Scholar |

Schwilk DW (2015) Dimensions of plant flammability. New Phytologist 206, 486–488.
Dimensions of plant flammability.Crossref | GoogleScholarGoogle Scholar |

Schwilk DW, Caprio AC (2011) Scaling from leaf traits to fire behaviour: community composition predicts fire severity in a temperate forest. Journal of Ecology 99, 970–980.
Scaling from leaf traits to fire behaviour: community composition predicts fire severity in a temperate forest.Crossref | GoogleScholarGoogle Scholar |

Sullivan A, McCaw L, Cruz M, Matthews S, Ellis PF (2012) Fuel, fire weather and fire behaviour in Australian ecosystems. In ‘Flammable Australia: Fire Regimes, Biodiversity and Ecosystems in a Changing World’. (Eds RA Bradstock, AM Gill, RJ Williams) pp. 51–77. (CSIRO Publishing)

Tumino BJ, Duff TJ, Goodger JQD, Cawson JG (2019) Plant traits linked to field-scale flammability metrics in prescribed burns in Eucalyptus forest. PLoS ONE 14, e0221403
Plant traits linked to field-scale flammability metrics in prescribed burns in Eucalyptus forest.Crossref | GoogleScholarGoogle Scholar |

Van Wagner CE (1977) Conditions for the start and spread of crown fire. Canadian Journal of Forest Research 7, 23–34.
Conditions for the start and spread of crown fire.Crossref | GoogleScholarGoogle Scholar |

Viegas DX (1998) Forest fire propagation. Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences 356, 2907–2928.
Forest fire propagation.Crossref | GoogleScholarGoogle Scholar |

Vermesi I, DiDomizio MJ, Richter F, Weckman EJ, Rein G (2017) Pyrolysis and spontaneous ignition of wood under transient irradiation: Experiments and a-priori predictions. Fire Safety Journal 91, 218–225.
Pyrolysis and spontaneous ignition of wood under transient irradiation: Experiments and a-priori predictions.Crossref | GoogleScholarGoogle Scholar |

Weise DR, White RH, Beall FC, Etlinger M (2005) Use of the cone calorimeter to detect seasonal differences in selected combustion characteristics of ornamental vegetation. International Journal of Wildland Fire 14, 321–338.
Use of the cone calorimeter to detect seasonal differences in selected combustion characteristics of ornamental vegetation.Crossref | GoogleScholarGoogle Scholar |

White RH, Zipperer WC (2010) Testing and classification of individual plants for fire behaviour: plant selection for the wildland–urban interface. International Journal of Wildland Fire 19, 213–227.
Testing and classification of individual plants for fire behaviour: plant selection for the wildland–urban interface.Crossref | GoogleScholarGoogle Scholar |

Wickham H (2016) ‘ggplot2: Elegant Graphics for Data Analysis.’ (Springer-Verlag: New York)

Wyse SV, Perry GLW, O’Connell DM, Holland PS, Wright MJ, Hosted CL, Whitelock SL, Geary IJ, Maurin KJL, Curran TJ (2016) A quantitative assessment of shoot flammability for 60 tree and shrub species supports rankings based on expert opinion. International Journal of Wildland Fire 25, 466–477.
A quantitative assessment of shoot flammability for 60 tree and shrub species supports rankings based on expert opinion.Crossref | GoogleScholarGoogle Scholar |

Wyse SV, Perry GLW, Curran TJ (2017) Shoot-level flammability of species mixtures is driven by the most flammable species: implications for vegetation–fire feedbacks favouring invasive species. Ecosystems 21, 886–900.
Shoot-level flammability of species mixtures is driven by the most flammable species: implications for vegetation–fire feedbacks favouring invasive species.Crossref | GoogleScholarGoogle Scholar |

Xanthopoulos G (1990) ‘Development of a wildland crown fire initiation model.’ PhD Thesis. (University of Montana, Missoula, MT)

Xanthopoulos G, Calfapietra C, Fernandes P (2012) Fire hazard and flammability of European forest types. In ‘Post-Fire Management and Restoration of Southern European Forests’. (Eds F Moreira, M Arianoutsou, P Corona, J De las Heras) pp. 79–92. (Springer Netherlands: Dordrecht)

Zhai C, Gong J, Zhou X, Peng F, Yang L (2017) Pyrolysis and spontaneous ignition of wood under time-dependent heat flux. Journal of Analytical and Applied Pyrolysis 125, 100–108.
Pyrolysis and spontaneous ignition of wood under time-dependent heat flux.Crossref | GoogleScholarGoogle Scholar |

Zylstra P, Bradstock RA, Bedward M, Penman TD, Doherty MD, Weber RO, Gill AM, Cary GJ (2016) Biophysical mechanistic modelling quantifies the effects of plant traits on fire severity: species, not surface fuel loads, determine flame dimensions in eucalypt forests. PLoS ONE 11, e0160715
Biophysical mechanistic modelling quantifies the effects of plant traits on fire severity: species, not surface fuel loads, determine flame dimensions in eucalypt forests.Crossref | GoogleScholarGoogle Scholar |