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Journal of the International Association of Wildland Fire
RESEARCH ARTICLE

Resistance of Pinus pinea L. bark to fire

Javier Madrigal A C D , Jennifer Souto-García B , Rafael Calama A C , Mercedes Guijarro A C , Juan Picos B and Carmen Hernando A C
+ Author Affiliations
- Author Affiliations

A INIA, Centro de Investigación Forestal, Departamento de Dinámica y Gestión Forestal. Carretera de La Coruña km 7,5, 28040 Madrid, Spain.

B Universidad de Vigo, Escola de Enxeniería Forestal de Pontevedra., Campus Universitario da Xunqueira, 36005 Pontevedra, Spain.

C iuFOR, Instituto Universitario de Gestión Forestal Sostenible uVA-INIA. Avenida de Madrid SN, 34004 Palencia, Spain

D Corresponding autor. Email: incendio@inia.es

International Journal of Wildland Fire 28(5) 342-353 https://doi.org/10.1071/WF18118
Submitted: 31 July 2018  Accepted: 29 January 2019   Published: 5 March 2019

Abstract

The stone pine (Pinus pinea L.) has thick bark as an adaptation to wildfire. In this study, laboratory tests were carried out to quantify the influence of bark thickness on flammability and fire resistance in this species. Heating rate in the cambium and the time to reach lethal temperatures in living tissues were determined using a mass loss calorimeter. In addition, data from permanent plots were used to generate linear mixed models to predict bark thickness along the trunk in stone pine stands. The combination of laboratory and field data provided information about the critical threshold of bark thickness (2 cm) below which the heat transmission rate would increase, decreasing the time to reach lethal temperatures in the cambium and therefore the resistance to fire. A new model was developed to calculate critical thresholds of charring height that guarantee efficient protection from fire along the trunk. Predicting whether the bark is thick enough to help trees survive may have important applications in the field of forest fuel management and in the ecology of these pine forests, as well as in preventive silviculture to assess critical heights of trunks likely to be affected during wildfire and prescribed burning.

Additional keywords: adaptations to fire, forest fires, prescribed burning, profile equation, silviculture.


References

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

Araque Jiménez E, Sánchez Martínez JD, Moya García E, Pulido Mérida R (1999) Los incendios forestales en Andalucía y Extremadura durante el tránsito de los siglos XIX y XX. In ‘Incendios históricos. Una aproximación multi-disciplinar’. (Coord. E Araque Jiménez) pp. 163–218. (Universidad Internacional de Andalucía: Seville, Spain)

Battipaglia G, Savi T, Ascoli D, Castegneri D, Esposito A, Mayr S, Nardini A (2016) Effects of prescribed burning on ecophysiological, anatomical, and stem hydraulic properties in Pinus pinea L. Tree Physiology 36, 1019–1031.
Effects of prescribed burning on ecophysiological, anatomical, and stem hydraulic properties in Pinus pinea L.Crossref | GoogleScholarGoogle Scholar | 27178842PubMed |

Bauer G, Speck T, Blömer J, Bertling J, Speck O (2010) Insulation capability of the bark of trees with different fire adaptations. Journal of Materials Science 45, 5950–5959.
Insulation capability of the bark of trees with different fire adaptations.Crossref | GoogleScholarGoogle Scholar |

Bova AS, Dickinson MB (2009) An inverse method to estimate stem surface heat flux in wildland fires. International Journal of Wildland Fire 18, 711–721.
An inverse method to estimate stem surface heat flux in wildland fires.Crossref | GoogleScholarGoogle Scholar |

Brando PM, Nepstad DC, Balch JK, Bolker B, Christman MC, Coe M, Putz FE (2012) Fire-induced tree mortality in a neotropical forest: the roles of bark traits, tree size, wood density and fire behavior. Global Change Biology 18, 630–641.
Fire-induced tree mortality in a neotropical forest: the roles of bark traits, tree size, wood density and fire behavior.Crossref | GoogleScholarGoogle Scholar |

Calama R, Cañadas N, Montero G (2003) Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.) in Spain. Annals of Forest Science 60, 259–269.
Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.) in Spain.Crossref | GoogleScholarGoogle Scholar |

Calama R, Sánchez-González M, Montero G (2007) Management-oriented growth models for multifunctional Mediterranean forests: the case of stone pine (Pinus pinea L.). In ‘EFI Proceedings 56’. 27–28 November 2006 Solsona, Spain (Eds M Palahí, Y Birot, M Rois) pp. 57–70. (European Forest Institute: Joensuu, Finland)

Calama R, Gordo J, Madrigal G, Mutke S, Conde M, Montero G, Pardos M (2016) Enhanced tools for predicting annual stone pine (Pinus pinea L.) cone production at tree and forest scale in inner Spain. Forest Systems 25, e079
Enhanced tools for predicting annual stone pine (Pinus pinea L.) cone production at tree and forest scale in inner Spain.Crossref | GoogleScholarGoogle Scholar |

Cardil A, Molina D, Oliveres J, Castellnou M (2016) Fire effects in Pinus uncinata Ram. plantations. Forest Systems 25, eSC06
Fire effects in Pinus uncinata Ram. plantations.Crossref | GoogleScholarGoogle Scholar |

Carrión JS, Fernández S, González-Sampériz P, Gil-Romera G, Badal E, Carrión-Marco Y, López-Merino L, López-Sáez JA, Fierro E, Burjachs F (2010) Expected trends and surprises in the Late Glacial and Holocene vegetation history of the Iberian Peninsula and Balearic Islands. Review of Palaeobotany and Palynology 162, 458–475.
Expected trends and surprises in the Late Glacial and Holocene vegetation history of the Iberian Peninsula and Balearic Islands.Crossref | GoogleScholarGoogle Scholar |

Catry FX, Rego F, Moreira F, Fernandes PM, Pausas JG (2010) Post-fire tree mortality in mixed forests of central Portugal. Forest Ecology and Management 260, 1184–1192.
Post-fire tree mortality in mixed forests of central Portugal.Crossref | GoogleScholarGoogle Scholar |

Catry FX, Moreira F, Pausas JG, Fernandes PM, Rego F, Cardillo E, Curt T (2012) Cork oak vulnerability to fire: the role of bark harvesting, tree characteristics and abiotic factors. PLoS One 7, e39810
Cork oak vulnerability to fire: the role of bark harvesting, tree characteristics and abiotic factors.Crossref | GoogleScholarGoogle Scholar | 22787521PubMed |

Cellini JM, Galarza M, Burns SL, Martinez-Pastur GJ, Lencinas MV (2012) Equations of bark thickness and volume profiles at different heights with easy measurement variables. Forest Systems 21, 23–30.
Equations of bark thickness and volume profiles at different heights with easy measurement variables.Crossref | GoogleScholarGoogle Scholar |

Costa JJ, Oliveira LA, Viegas DX, Neto LP (1991) On the temperature distribution inside a tree under fire conditions. International Journal of Wildland Fire 1, 87–96.
On the temperature distribution inside a tree under fire conditions.Crossref | GoogleScholarGoogle Scholar |

Court-Picon MC, Gadbin-Henry C, Guibal F, Roux M (2004) Dendrometry and morphometry of Pinus pinea L. in Lower Provence (France): adaptability and variability of provenances. Forest Ecology and Management 194, 319–333.
Dendrometry and morphometry of Pinus pinea L. in Lower Provence (France): adaptability and variability of provenances.Crossref | GoogleScholarGoogle Scholar |

Cruz MG, Butler BW, Alexander ME (2006) Predicting the ignition of crown fuels above a spreading surface fire. Part II: model evaluation. International Journal of Wildland Fire 15, 61–72.
Predicting the ignition of crown fuels above a spreading surface fire. Part II: model evaluation.Crossref | GoogleScholarGoogle Scholar |

Cutini A (2002) ‘Pines of silvicultural importance.’ (CABI: Wallingford, UK) 608 pp.

Dehane B, Madrigal J, Hernando C, Bouhraoua R, Guijarro M (2015) New bench-scale protocols to characterize flammability and fire resistance of trees: application to Algerian cork. Journal of Fire Sciences 33, 202–217.
New bench-scale protocols to characterize flammability and fire resistance of trees: application to Algerian cork.Crossref | GoogleScholarGoogle Scholar |

Della Rocca G, Danti R, Hernando C, Guijarro M, Madrigal J (2018) Flammability of two Mediterranean mixed forests: study of the non-additive effect of fuel mixtures in laboratory. Frontiers of Plant Science 9, 825
Flammability of two Mediterranean mixed forests: study of the non-additive effect of fuel mixtures in laboratory.Crossref | GoogleScholarGoogle Scholar |

Dickinson MB, Johnson EA (2001) Fire effects on trees. In ‘Forest fires: behavior and ecological effects’. (Eds EA Johnson, K Miyanishi) pp. 477–525. (Academic Press: New York, NY, USA).

Doblas-Miranda E, Martínez-Vilalta J, Lloret F, Álvarez A, Ávila A, Bonet FJ, Brotons L, Castro J, Curiel Yuste J, Díaz M, Ferrandis P, García-Hurtado E, Iriondo JM, Keenan TF, Latron J, Llusià J, Loepfe L, Mayol M, Moré G, Moya D, Peñuelas J, Pons X, Poyatos R, Sardans J, Sus O, Vallejo VR, Vayreda J, Retana J (2015) Reassessing global change research priorities in Mediterranean terrestrial ecosystems: how far have we come and where do we go from here? Global Ecology and Biogeography 24, 25–43.
Reassessing global change research priorities in Mediterranean terrestrial ecosystems: how far have we come and where do we go from here?Crossref | GoogleScholarGoogle Scholar |

Espinosa J, Madrigal J, De La Cruz AC, Guijarro M, Jiménez E, Hernando C (2018) Short-term effects of prescribed burning on litterfall biomass in mixed stands of Pinus nigra and Pinus pinaster and pure stands of Pinus nigra in the Cuenca Mountains (central eastern Spain). The Science of the Total Environment 618, 941–951.
Short-term effects of prescribed burning on litterfall biomass in mixed stands of Pinus nigra and Pinus pinaster and pure stands of Pinus nigra in the Cuenca Mountains (central eastern Spain).Crossref | GoogleScholarGoogle Scholar | 29146076PubMed |

Fady B, Fineschi S, Vendramin GG (2004) EUFORGEN technical guidelines for genetic conservation and use for Italian stone pine (Pinus pinea). International Plant Genetic Resources Institute. (Rome: Italy) 6 pp.

Fernandes PM (2013) Fire-smart management of forest landscapes in the Mediterranean basin under global change. Landscape and Urban Planning 110, 175–182.
Fire-smart management of forest landscapes in the Mediterranean basin under global change.Crossref | GoogleScholarGoogle Scholar |

Fernandes PM, Vega JA, Jiménez E, Rigolot E (2008) Fire resistance of European pines. Forest Ecology and Management 256, 246–255.
Fire resistance of European pines.Crossref | GoogleScholarGoogle Scholar |

Franco Múgica F, García Antón M, Maldonado Ruiz J, Morla Juaristi C, Sainz Ollero H (2001) The Holocene history of Pinus forests in the Spanish Northern Meseta. The Holocene 11, 343–358.
The Holocene history of Pinus forests in the Spanish Northern Meseta.Crossref | GoogleScholarGoogle Scholar |

Frejaville T, Curt T, Carcaillet C (2013) Bark flammability as a fire-response trait for subalpine trees. Frontiers of Plant Science 4, 466
Bark flammability as a fire-response trait for subalpine trees.Crossref | GoogleScholarGoogle Scholar |

García-Amorena I, Gómez Manzaneque F, Rubiales JM, Granja HM, Soares de Carvalho GS, Morla C (2007) The Late Quaternary coastal forests of western Iberia: a study of their macroremains. Palaeogeography, Palaeoclimatology, Palaeoecology 254, 448–461.
The Late Quaternary coastal forests of western Iberia: a study of their macroremains.Crossref | GoogleScholarGoogle Scholar |

Giorgi F, Lionello P (2008) Climate change projections for the Mediterranean region. Global and Planetary Change 63, 90–104.
Climate change projections for the Mediterranean region.Crossref | GoogleScholarGoogle Scholar |

González JR, Trasobares A, Palahi M, Pukkala T (2007) Predicting stand damage and tree survival in burned forests in Catalonia (north-east Spain). Annals of Forest Science 64, 733–742.
Predicting stand damage and tree survival in burned forests in Catalonia (north-east Spain).Crossref | GoogleScholarGoogle Scholar |

He T, Pausas JG, Belcher CM, Schwilk DW, Lamont BB (2012) Fire-adapted traits of Pinus arose in the fiery Cretaceous. New Phytologist 194, 751–759.
Fire-adapted traits of Pinus arose in the fiery Cretaceous.Crossref | GoogleScholarGoogle Scholar | 22348443PubMed |

Hengst GE, Dawson JO (1994) Bark properties and fire resistance of selected tree species from the central hardwood region of North America. Canadian Journal of Forest Research 24, 688–696.
Bark properties and fire resistance of selected tree species from the central hardwood region of North America.Crossref | GoogleScholarGoogle Scholar |

Jiménez E, Vega JA, Fernández C (2017) Response of Pinus pinaster Ait. trees to controlled localised application of heat to stem and crown. Trees 31, 1203–1213.
Response of Pinus pinaster Ait. trees to controlled localised application of heat to stem and crown.Crossref | GoogleScholarGoogle Scholar |

Jones JL, Webb BW, Butler BW., Dickinson MB, Jimenez D, Reardon J, Bova AS (2006) Prediction and measurement of thermally induced cambial tissue necrosis in tree stems. International Journal of Wildland Fire 15, 3–17.
Prediction and measurement of thermally induced cambial tissue necrosis in tree stems.Crossref | GoogleScholarGoogle Scholar |

Laasasenaho J, Melkas T, Aldén S (2005) Modelling bark thickness of Picea abies with taper curves. Forest Ecology and Management 206, 35–47.
Modelling bark thickness of Picea abies with taper curves.Crossref | GoogleScholarGoogle Scholar |

Lawes MJ, Richards A, Dathe J, Midgley JJ (2011) Bark thickness determines fire resistance of selected tree species from fire-prone tropical savanna in north Australia. Plant Ecology 212, 2057–2069.
Bark thickness determines fire resistance of selected tree species from fire-prone tropical savanna in north Australia.Crossref | GoogleScholarGoogle Scholar |

Li R, Weiskittel AR (2011) Estimating and predicting bark thickness for seven conifer species in the Acadian region of North America using a mixed-effects modeling approach: comparison of model forms and subsampling strategies. European Journal of Forest Research 130, 219–233.
Estimating and predicting bark thickness for seven conifer species in the Acadian region of North America using a mixed-effects modeling approach: comparison of model forms and subsampling strategies.Crossref | GoogleScholarGoogle Scholar |

Lindner M, Maroschek M, Netherer S, Kremer A, Barbati A, Garcia-Gonzalo J, Seidl R, Delzon S, Corona P, Kolström M, Lexer MJ, Marchetti M (2010) Climate change impacts, adaptive capacity, and vulnerability of European forest ecosystems. Forest Ecology and Management 259, 698–709.
Climate change impacts, adaptive capacity, and vulnerability of European forest ecosystems.Crossref | GoogleScholarGoogle Scholar |

Loewe Muñoz V, Delard-Rodríguez C, Balzarini M, Álvarez Contreras A, Navarro-Cerrillo RM (2015) Impact of climate and management variables on stone pine (Pinus pinea L.) growing in Chile. Agricultural and Forest Meteorology 214–215, 106–116.
Impact of climate and management variables on stone pine (Pinus pinea L.) growing in Chile.Crossref | GoogleScholarGoogle Scholar |

Madrigal J, Hernando C, Guijarro M, Díez C (2009) Evaluation of forest fuel flammability and combustion properties with an adapted mass loss calorimeter device. Journal of Fire Sciences 27, 323–342.
Evaluation of forest fuel flammability and combustion properties with an adapted mass loss calorimeter device.Crossref | GoogleScholarGoogle Scholar |

Manso R, Pardos M, Calama R (2014) Climatic factors control rodent seed predation in Pinus pinea L. stands in central Spain. Annals of Forest Science 71, 873–883.
Climatic factors control rodent seed predation in Pinus pinea L. stands in central Spain.Crossref | GoogleScholarGoogle Scholar |

Manuel Valdés C (1999) La presencia histórica de los incendios forestales en el Centro y Este Peninsular. Fuentes, metodología y resultados. In ‘Incendios históricos. Una aproximación multi-disciplinar’. (Coord. E Araque Jiménez) pp. 63–110. (Universidad Internacional de Andalucía, Huelva, Spain)

Martin RE, Gordon DA, Gutierrez ME, 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’, 26–28 October 1993, Jekyll Island, GA. pp. 130–137. (Society of American Foresters: Bethesda, MD, USA)

Martinson EJ, Omi FN (2013) Fuel treatments and fire severity: a meta-analysis. Research Paper RMRS-RP-103WWW (USDA Forest Service, Rocky Mountain Research Station: Fort Collins, CO, USA)

Midgley JJ, Kruger LM, Skelton R (2011) How do fires kill plants? The hydraulic death hypothesis and Cape Proteaceae ‘fire-resisters’. South African Journal of Botany 77, 381–386.
How do fires kill plants? The hydraulic death hypothesis and Cape Proteaceae ‘fire-resisters’.Crossref | GoogleScholarGoogle Scholar |

Molina JR, Rodríguez y Silva F, Herrera MA (2011) Potential crown fire behaviour in Pinus pinea stands following different fuel treatments. Forest Systems 20, 266–277.
Potential crown fire behaviour in Pinus pinea stands following different fuel treatments.Crossref | GoogleScholarGoogle Scholar |

Montero G, Calama R, Ruiz-Peinado R (2008) Selvicultura del pino piñonero. In ‘Compendio de selvicultura aplicada en España’. (Eds R Serrada, G Montero, J Reque) pp. 431–470. (INIA-FUCOVASA: Madrid, Spain)

Moreira F, Viedma O, Arianoutsou M, Curt T, Koutsias N, Rigolot E, Mouillot F (2011) Landscape–wildfire interactions in southern Europe: implications for landscape management. Journal of Environmental Management 92, 2389–2402.
Landscape–wildfire interactions in southern Europe: implications for landscape management.Crossref | GoogleScholarGoogle Scholar | 21741757PubMed |

Mutke S, Gordo J, Gil L (2005) Variability of Mediterranean stone pine cone production: yield loss as response to climatic change. Agricultural and Forest Meteorology 132, 263–272.
Variability of Mediterranean stone pine cone production: yield loss as response to climatic change.Crossref | GoogleScholarGoogle Scholar |

Mutke S, Calama R, González-Martinez S, Montero G, Gordo J, Bono D, Gil L (2012) Mediterranean stone pine: botany and horticulture. Horticultural Reviews 39, 153–202.
Mediterranean stone pine: botany and horticulture.Crossref | GoogleScholarGoogle Scholar |

Odhiambo B, Meincken M, Seifert T (2014) The protective role of bark against fire damage: a comparative study on selected introduced and indigenous tree species in the Western Cape, South Africa. Trees 28, 555–565.
The protective role of bark against fire damage: a comparative study on selected introduced and indigenous tree species in the Western Cape, South Africa.Crossref | GoogleScholarGoogle Scholar |

Pageaud D (1991) Reconstitution naturelle de peuplements résineux après incendie (Pinus pinea L. & Pinus halepensis Mill.). PhD Thesis, INRA (Avignon, France). (ENITEF Ecole Nationale des Ingénieurs des Travaux des Eaux et Forêts: Nogent-sur-Vernisson, France). 49 pp.

Pardos M, Calama R (2018) Responses of Pinus pinea seedlings to moderate drought and shade: is the provenance a differential factor? Photosynthetica 56, 786–798.
Responses of Pinus pinea seedlings to moderate drought and shade: is the provenance a differential factor?Crossref | GoogleScholarGoogle Scholar |

Pardos M, Puértolas J, Madrigal G, Garriga E, De Blas S, Calama R (2010) Seasonal changes in the physiological activity of regeneration under a natural light gradient in a Pinus pinea regular stand. Forest Systems 19, 367–380.
Seasonal changes in the physiological activity of regeneration under a natural light gradient in a Pinus pinea regular stand.Crossref | GoogleScholarGoogle Scholar |

Pardos M, Climent J, Almeida H, Calama R (2014) The role of developmental stage in frost tolerance of Pinus pinea L. seedlings and saplings. Annals of Forest Science 71, 551–562.
The role of developmental stage in frost tolerance of Pinus pinea L. seedlings and saplings.Crossref | GoogleScholarGoogle Scholar |

Pausas JG (2015) Bark thickness and fire regime. Functional Ecology 29, 315–327.
Bark thickness and fire regime.Crossref | GoogleScholarGoogle Scholar |

Pausas JG (2017) Bark thickness and fire regime: another twist. New Phytologist 213, 13–15.
Bark thickness and fire regime: another twist.Crossref | GoogleScholarGoogle Scholar | 27891644PubMed |

Pausas JG, Alessio GA, Moreira B, Corcobado G (2012) Fires enhance flammability in Ulex parviflorus New Phytologist 193, 18–23.
Fires enhance flammability in Ulex parviflorusCrossref | GoogleScholarGoogle Scholar | 22039968PubMed |

Pellegrini AF, Anderegg WR, Paine CE, Hoffmann WA, Kartzinel T, Rabin SS, Sheil D, Franco AC, Pacala SW (2017) Convergence of bark investment according to fire and climate structures ecosystem vulnerability to future change. Ecology Letters 20, 307–316.
Convergence of bark investment according to fire and climate structures ecosystem vulnerability to future change.Crossref | GoogleScholarGoogle Scholar | 28074597PubMed |

Pinard M, Huffman J (1997) Fire resistance and bark properties of trees in a seasonally dry forest in eastern Bolivia. Journal of Tropical Ecology 13, 727–740.
Fire resistance and bark properties of trees in a seasonally dry forest in eastern Bolivia.Crossref | GoogleScholarGoogle Scholar |

Resco de Dios V, Arteaga C, Hedo J, Gil-Pelegrin E, Voltas J (2018) A trade-off between embolism resistance and bark thickness in conifers: are drought and fire adaptations antagonistic? Plant Ecology and Biodiversity 11, 253–258.
A trade-off between embolism resistance and bark thickness in conifers: are drought and fire adaptations antagonistic?Crossref | GoogleScholarGoogle Scholar |

Rigolot E (2004) Predicting post-fire mortality of Pinus halepensis Mill. and Pinus pinea L. Plant Ecology 171, 139–151.
Predicting post-fire mortality of Pinus halepensis Mill. and Pinus pinea L.Crossref | GoogleScholarGoogle Scholar |

Rigolot E, Ducrey M, Duhoux F, Huc R, Ryan KC (1994) Effects of fire injury on the physiology and growth of two pine species. In ‘Proceedings of the 2nd international conference on forest fire research’, 21–24 November 1994, Coimbra, Portugal. (Ed. DX Viegas). (Association for the Development of Industrial Aerodynamics: Coimbra, Portugal) pp. 857–866.

Rodrigo A, Retana J, Picó F (2004) Direct regeneration is not the only response of Mediterranean forests to large fires. Ecology 85, 716–729.
Direct regeneration is not the only response of Mediterranean forests to large fires.Crossref | GoogleScholarGoogle Scholar |

Rodrigo A, Quintana V, Retana J (2007) Fire reduces Pinus pinea distribution in the north-eastern Iberian Peninsula. Ecoscience 14, 23–30.
Fire reduces Pinus pinea distribution in the north-eastern Iberian Peninsula.Crossref | GoogleScholarGoogle Scholar |

Rosell JA (2016) Bark thickness across the angiosperms: more than just fire. New Phytologist 211, 90–102.
Bark thickness across the angiosperms: more than just fire.Crossref | GoogleScholarGoogle Scholar | 26890029PubMed |

Ryan KC, Reinhardt ED (1988) Predicting post-fire mortality of seven western conifers. Canadian Journal of Forest Research 18, 1291–1297.
Predicting post-fire mortality of seven western conifers.Crossref | GoogleScholarGoogle Scholar |

Ryan KC, Rigolot E, Botelho H (1994) Comparative analysis of fire resistance and survival of Mediterranean and North American conifers. In ‘Proceedings of the 12th conference on fire and forest meteorology’, 26–28 October 1993, Jekyll Island, GA. pp. 701–708. (Society of American Foresters: Bethesda, MD, USA)

Sánchez-González MO, Sánchez MM, Cañellas I (2007) Modelo de predicción del calibre de bornizo mediante funciones de perfil del tronco. Cuadernos de la Sociedad Española de Ciencias Forestales 23, 239–243.

Sonmez T, Keles S, Tilki F (2007) Effect of aspect, tree age and tree diameter on bark thickness of Picea orientalis. Scandinavian Journal of Forest Research 22, 193–197.
Effect of aspect, tree age and tree diameter on bark thickness of Picea orientalis.Crossref | GoogleScholarGoogle Scholar |

Stängle SM, Sauter UH, Dormann CF (2017) Comparison of models for estimating bark thickness of Picea abies in south-west Germany: the role of tree, stand, and environmental factors. Annals of Forest Science 74, 16
Comparison of models for estimating bark thickness of Picea abies in south-west Germany: the role of tree, stand, and environmental factors.Crossref | GoogleScholarGoogle Scholar |

Stephens SL, Finney MA (2002) Prescribed fire mortality of Sierra Nevada mixed-conifer tree species: effects of crown damage and forest floor combustion. Forest Ecology and Management 162, 261–271.
Prescribed fire mortality of Sierra Nevada mixed-conifer tree species: effects of crown damage and forest floor combustion.Crossref | GoogleScholarGoogle Scholar |

Tapias R, Climent J, Pardos JA, Gil L (2004) Life histories of Mediterranean pines. Plant Ecology 171, 53–68.
Life histories of Mediterranean pines.Crossref | GoogleScholarGoogle Scholar |

Valor T, González-Olabarría JR, Piqué M (2015) Assessing the impact of prescribed burning on the growth of European pines. Forest Ecology and Management 343, 101–109.
Assessing the impact of prescribed burning on the growth of European pines.Crossref | GoogleScholarGoogle Scholar |

Vázquez A, Climent JM, Casais L, Quintana JR (2015) Current and future estimates for the fire frequency and the fire rotation period in the main woodland types of peninsular Spain: a case-study approach. Forest Systems 24, e031
Current and future estimates for the fire frequency and the fire rotation period in the main woodland types of peninsular Spain: a case-study approach.Crossref | GoogleScholarGoogle Scholar |

Wright HA, Wright HA, Bailey AW (1982) ‘Fire ecology: United States and southern Canada.’ (John Wiley & Sons Ltd Publishing: New York, NY, USA)

Zeibig-Kichas NE, Ardis CW, Berrill JP, King JP (2016) Bark thickness equations for mixed-conifer forest type in Klamath and Sierra Nevada Mountains of California. International Journal of Forestry Research Article ID 1864039
Bark thickness equations for mixed-conifer forest type in Klamath and Sierra Nevada Mountains of California.Crossref | GoogleScholarGoogle Scholar |