Effect of Fire Frequency on the Flammability of Two Mediterranean Pines: Link with Needle Terpene Content
Abstract
:1. Introduction
2. Results
2.1. Variation of Flammability According to the Fire Modality
2.1.1. Shoot Flammability
2.1.2. Litter Flammability
2.2. Variation of Terpene Content According to the Fire Modality
2.3. Terpenes Linked to Flammability According to the Fire Modality
2.4. Influence of Terpene Molecules on Flammability According to Fire Modality
3. Discussion
3.1. Effect of the Fire Frequency on Flammability
3.2. Variation in Terpene Content and Composition According to the Fire Frequency and Their Links to Flammability
4. Materials and Methods
4.1. Area and Species Studied
4.2. Sampling Plan
4.3. Flammability Measurements
4.3.1. Shoot Flammability
4.3.2. Litter Flammability
P. halepensis
P. sylvestris
4.4. Flammability Cofactors
4.5. Terpene Content Analysis
4.6. Data Analysis
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
- Mutch, R.W. Wildland Fires and Ecosystems—A Hypothesis. Ecology 1970, 51, 1046–1051. [Google Scholar] [CrossRef]
- Bond, W.J.; Midgley, J.J. Kill thy neighbour: An individualistic argument for the evolution of flammability. Oikos 1995, 79–85. [Google Scholar] [CrossRef]
- Pausas, J.G.; Pratt, R.B.; Keeley, J.E.; Jacobsen, A.L.; Ramirez, A.R.; Vilagrosa, A.; Paula, S.; Kaneakua-Pia, I.N.; Davis, S.D. Towards understanding resprouting at the global scale. New Phytol. 2016, 209, 945–954. [Google Scholar] [CrossRef] [PubMed] [Green Version]
- Bond, W.J.; Keeley, J.E. Fire as a global ‘herbivore’: The ecology and evolution of flammable ecosystems. Trends Ecol. Evol. 2005, 20, 387–394. [Google Scholar] [CrossRef]
- Krawchuk, M.A.; Moritz, M.A.; Parisien, M.-A.; Van Dorn, J.; Hayhoe, K. Global pyrogeography: The current and future distribution of wildfire. PLoS ONE 2009, 4, e5102. [Google Scholar] [CrossRef]
- Moreno, J.M.; Oechel, W.C. The Role of Fire in Mediterranean—Type Ecosystems; Springer Science & Business Media: New York, NY, USA, 2012; Volume 107. [Google Scholar]
- Archibald, S.; Lehmann, C.E.; Belcher, C.M.; Bond, W.J.; Bradstock, R.A.; Daniau, A.; Dexter, K.; Forrestel, E.; Greve, M.; He, T. Biological and geophysical feedbacks with fire in the Earth system. Environ. Res. Lett. 2018, 13, 033003. [Google Scholar] [CrossRef] [Green Version]
- He, T.; Lamont, B.B. Fire as a potent mutagenic agent among plants. Crit. Rev. Plant Sci. 2018, 37, 1–14. [Google Scholar] [CrossRef]
- He, T.; Lamont, B.B.; Pausas, J.G. Fire as a key driver of Earth’s biodiversity. Biol. Rev. 2019, 94, 1983–2010. [Google Scholar] [CrossRef]
- Oliveira, S.; Oehler, F.; San-Miguel-Ayanz, J.; Camia, A.; Pereira, J.M. Modeling spatial patterns of fire occurrence in Mediterranean Europe using Multiple Regression and Random Forest. For. Ecol. Manag. 2012, 275, 117–129. [Google Scholar] [CrossRef]
- Moreno, M.V.; Conedera, M.; Chuvieco, E.; Pezzatti, G.B. Fire regime changes and major driving forces in Spain from 1968 to 2010. Environ. Sci. Policy 2014, 37, 11–22. [Google Scholar] [CrossRef]
- Quintano, C.; Fernández-Manso, A.; Calvo, L.; Marcos, E.; Valbuena, L. Land surface temperature as potential indicator of burn severity in forest Mediterranean ecosystems. Int. J. Appl. Earth Obs. Geoinf. 2015, 36, 1–12. [Google Scholar] [CrossRef]
- Guiot, J.; Cramer, W. Climate change: The 2015 Paris Agreement thresholds and Mediterranean basin ecosystems. Science 2016, 354, 465–468. [Google Scholar] [CrossRef]
- Fargeon, H.; Dupuy, J.-L.; Martin-Stpaul, N.; Pimont, F. Climate change impact on wildfires: Where do the greatest uncertainties lie? Climatic Chang. 2020, 160, 479–493. [Google Scholar] [CrossRef]
- Bond, W.J.; Scott, A.C. Fire and the spread of flowering plants in the Cretaceous. New Phytol. 2010, 188, 1137–1150. [Google Scholar] [CrossRef]
- Pausas, J.G.; Keeley, J.E. Abrupt climate-independent fire regime changes. Ecosystems 2014, 17, 1109–1120. [Google Scholar] [CrossRef]
- Anderson, H.E. Forest fuel ignitibility. Fire Technol. 1970, 6, 312–319. [Google Scholar] [CrossRef]
- Martin, R.E.; Gordon, D.A.; Gutierrez, M.; Lee, D.S.; Molina, D.M.; Schroeder, R.A.; Sapsis, D.B.; Stephens, S.L.; Chambers, M. Assessing the flammability of domestic and wildland vegetation. In Proceedings of the 12th Conference on Fire and Forest Meteorology, Jekyll Island, GA, USA, 26–28 October 1993; pp. 26–28. [Google Scholar]
- Ganteaume, A.; Jappiot, M.; Lampin, C. Assessing the flammability of surface fuels beneath ornamental vegetation in wildland–urban interfaces in Provence (south-eastern France). Int. J. Wildland Fire 2013, 22, 333–342. [Google Scholar] [CrossRef] [Green Version]
- Pausas, J.; Alessio, G.A.; Moreira, B.; Segarra-Moragues, J.G. Secondary compounds enhance flammability in a Mediterranean plant. Oecologia 2016, 180, 103–110. [Google Scholar] [CrossRef] [Green Version]
- Varner, J.M.; Kane, J.M.; Kreye, J.K.; Engber, E. The flammability of forest and woodland litter: A synthesis. Curr. For. Rep. 2015, 1, 91–99. [Google Scholar] [CrossRef]
- Schwilk, D.W. Dimensions of plant flammability. New Phytol. 2015, 206, 486–488. [Google Scholar] [CrossRef]
- Ganteaume, A. Does plant flammability differ between leaf and litter bed scale? Role of fuel characteristics and consequences for flammability assessment. Int. J. Wildland Fire 2018, 27, 342–352. [Google Scholar] [CrossRef] [Green Version]
- Pausas, J.G.; Keeley, J.E.; Schwilk, D.W. Flammability as an ecological and evolutionary driver. J. Ecol. 2017, 105, 289–297. [Google Scholar] [CrossRef]
- Engber, E.A.; Varner III, J.M. Patterns of flammability of the California oaks: The role of leaf traits. Can. J. For. Res. 2012, 42, 1965–1975. [Google Scholar] [CrossRef]
- Clarke, P.J.; Knox, K.E.; Butler, D. Fire, soil fertility and delayed seed release: A community analysis of the degree of serotiny. Evol. Ecol. 2013, 27, 429–443. [Google Scholar] [CrossRef]
- Grootemaat, S.; Wright, I.J.; van Bodegom, P.M.; Cornelissen, J.H.; Cornwell, W.K. Burn or rot: Leaf traits explain why flammability and decomposability are decoupled across species. Funct. Ecol. 2015, 29, 1486–1497. [Google Scholar] [CrossRef] [Green Version]
- Pausas, J.G.; Alessio, G.A.; Moreira, B.; Corcobado, G. Fires enhance flammability in Ulex parviflorus. New Phytol. 2012, 193, 18–23. [Google Scholar] [CrossRef] [Green Version]
- Romero, B.; Ganteaume, A. Does recent fire activity impact fire-related traits of Pinus halepensis Mill. and Pinus sylvestris L. in the French Mediterranean area? Ann. For. Sci. 2020, 77, 1–19. [Google Scholar] [CrossRef]
- Moreira, B.; Castellanos, M.C.; Pausas, J. Genetic component of flammability variation in a Mediterranean shrub. Mol. Ecol. 2014, 23, 1213–1223. [Google Scholar] [CrossRef] [Green Version]
- Gill, A.M. Fire and the Australian flora: A review. Aust. For. 1975, 38, 4–25. [Google Scholar] [CrossRef]
- Parisien, M.-A.; Moritz, M.A. Environmental controls on the distribution of wildfire at multiple spatial scales. Ecol. Monogr. 2009, 79, 127–154. [Google Scholar] [CrossRef]
- Whitlock, C.; Higuera, P.E.; McWethy, D.B.; Briles, C.E. Paleoecological perspectives on fire ecology: Revisiting the fire-regime concept. Open Ecol. J. 2010, 3, 6–23. [Google Scholar] [CrossRef] [Green Version]
- Enright, N.J.; Fontaine, J.B. Climate Change and the Management of Fire-Prone Vegetation in Southwest and Southeast A ustralia. Geogr. Res. 2014, 52, 34–44. [Google Scholar] [CrossRef]
- Leonard, J.; West, A.G.; Ojeda, F. Differences in germination response to smoke and temperature cues in ‘pyrophyte’and ‘pyrofuge’forms of Erica coccinea (Ericaceae). Int. J. Wildland Fire 2018, 27, 562–568. [Google Scholar] [CrossRef]
- Fernández-García, V.; Marcos, E.; Fulé, P.Z.; Reyes, O.; Santana, V.M.; Calvo, L. Fire regimes shape diversity and traits of vegetation under different climatic conditions. Sci. Total Environ. 2020, 716, 137137. [Google Scholar] [CrossRef] [PubMed]
- Fernandes, P.M.; Vega, J.A.; Jimenez, E.; Rigolot, E. Fire resistance of European pines. For. Ecol. Manag. 2008, 256, 246–255. [Google Scholar] [CrossRef]
- Pausas, J.G. Evolutionary fire ecology: Lessons learned from pines. Trends Plant Sci. 2015, 20, 318–324. [Google Scholar] [CrossRef] [PubMed]
- Pausas, J.G. Bark thickness and fire regime. Funct. Ecol. 2015, 29, 315–327. [Google Scholar] [CrossRef]
- Owens, M.K.; Lin, C.-D.; Taylor, C.A.; Whisenant, S.G. Seasonal patterns of plant flammability and monoterpenoid content in Juniperus ashei. J. Chem. Ecol. 1998, 24, 2115–2129. [Google Scholar] [CrossRef]
- Page, W.G.; Jenkins, M.J.; Runyon, J.B. Mountain pine beetle attack alters the chemistry and flammability of lodgepole pine foliage. Can. J. For. Res. 2012, 42, 1631–1647. [Google Scholar] [CrossRef] [Green Version]
- Ormeño, E.; Ruffault, J.; Gutigny, C.; Madrigal, J.; Guijarro, M.; Hernando, C.; Ballini, C. Increasing cuticular wax concentrations in a drier climate promote litter flammability. For. Ecol. Manag. 2020, 473, 118242. [Google Scholar] [CrossRef]
- Nuñez, M.R.; Bravo, F.; Calvo, L. Predicting the probability of seed germination in Pinus sylvestris L. and four competitor shrub species after fire. Ann. For. Sci. 2003, 60, 75–81. [Google Scholar] [CrossRef]
- Keeley, J.E. Ecology and evolution of pine life histories. Ann. For. Sci. 2012, 69, 445–453. [Google Scholar] [CrossRef] [Green Version]
- Pichersky, E.; Gershenzon, J. The formation and function of plant volatiles: Perfumes for pollinator attraction and defense. Curr. Opin. Plant Biol. 2002, 5, 237–243. [Google Scholar] [CrossRef]
- Dicke, M.; van Poecke, R.M.; de Boer, J.G. Inducible indirect defence of plants: From mechanisms to ecological functions. Basic Appl. Ecol. 2003, 4, 27–42. [Google Scholar] [CrossRef]
- Peñuelas, J.; Llusià, J. BVOCs: Plant defense against climate warming? Trends Plant Sci. 2003, 8, 105–109. [Google Scholar] [CrossRef]
- Ormeno, E.; Cespedes, B.; Sanchez, I.A.; Velasco-García, A.; Moreno, J.M.; Fernandez, C.; Baldy, V. The relationship between terpenes and flammability of leaf litter. For. Ecol. Manag. 2009, 257, 471–482. [Google Scholar] [CrossRef]
- Boix, Y.F.; Victório, C.P.; Defaveri, A.C.A.; Arruda, R.D.C.D.O.; Sato, A.; Lage, C.L.S. Glandular trichomes of Rosmarinus officinalis L.: Anatomical and phytochemical analyses of leaf volatiles. Plant Biosyst. Int. J. Deal. All Asp. Plant Biol. 2011, 145, 848–856. [Google Scholar] [CrossRef]
- Alessio, G.A.; Peñuelas, J.; Llusià, J.; Ogaya, R.; Estiarte, M.; De Lillis, M. Influence of water and terpenes on flammability in some dominant Mediterranean species. Int. J. Wildland Fire 2008, 17, 274–286. [Google Scholar] [CrossRef]
- De Lillis, M.; Bianco, P.M.; Loreto, F. The influence of leaf water content and isoprenoids on flammability of some Mediterranean woody species. Int. J. Wildland Fire 2009, 18, 203–212. [Google Scholar] [CrossRef]
- Della Rocca, G.; Madrigal, J.; Marchi, E.; Michelozzi, M.; Moya, B.; Danti, R. Relevance of terpenoids on flammability of Mediterranean species: An experimental approach at a low radiant heat flux. Iforest-Biogeosci. For. 2017, 10, 766. [Google Scholar] [CrossRef] [Green Version]
- Romero, B.; Fernandez, C.; Lecareux, C.; Ormeño, E.; Ganteaume, A. How terpene content affects fuel flammability of wildland–urban interface vegetation. Int. J. Wildland Fire 2019, 28, 614–627. [Google Scholar] [CrossRef] [Green Version]
- Thompson, J.; Charpentier, A.; Bouguet, G.; Charmasson, F.; Roset, S.; Buatois, B.; Vernet, P.; Gouyon, P.-H. Evolution of a genetic polymorphism with climate change in a Mediterranean landscape. Proc. Natl. Acad. Sci. USA 2013, 110, 2893–2897. [Google Scholar] [CrossRef] [PubMed] [Green Version]
- Pratt, J.D.; Keefover-Ring, K.; Liu, L.Y.; Mooney, K.A. Genetically based latitudinal variation in Artemisia californica secondary chemistry. Oikos 2014, 123, 953–963. [Google Scholar] [CrossRef]
- Tapias, R.; Gil, L.; Fuentes-Utrilla, P.; Pardos, J.A. Canopy seed banks in Mediterranean pines of south-eastern Spain: A comparison between Pinus halepensis Mill., P. pinaster Ait., P. nigra Arn. and P. pinea L. J. Ecol. 2001, 89, 629–638. [Google Scholar] [CrossRef]
- Moya, D.; Espelta, J.; Lopez-Serrano, F.; Eugenio, M.; De Las Heras, J. Natural post-fire dynamics and serotiny in 10-year-old Pinus halepensis Mill. stands along a geographic gradient. Int. J. Wildland Fire 2008, 17, 287–292. [Google Scholar] [CrossRef]
- Dimitrakopoulos, A.; Papaioannou, K.K. Flammability assessment of Mediterranean forest fuels. Fire Technol. 2001, 37, 143–152. [Google Scholar] [CrossRef]
- Guijarro, M.; Hernando, C.; Díez, C.; Martínez, E.; Madrigal, J.; Lampin-Cabaret, C.; Blanc, L.; Colin, P.; Pérez-Gorostiaga, P.; Vega, J. Flammability of some fuel beds common in the South-European ecosystems. In Proceedings of the IV International Conference Forest Fire Research, Coimbra, Portugal, 18–23 November 2002. [Google Scholar]
- Michelaki, C.; Fyllas, N.M.; Galanidis, A.; Aloupi, M.; Evangelou, E.; Arianoutsou, M.; Dimitrakopoulos, P.G. Adaptive flammability syndromes in thermo-Mediterranean vegetation, captured by alternative resource-use strategies. Sci. Total Environ. 2020, 718, 137437. [Google Scholar] [CrossRef] [PubMed]
- Ordoñez, J.C.; Van Bodegom, P.M.; Witte, J.P.M.; Wright, I.J.; Reich, P.B.; Aerts, R. A global study of relationships between leaf traits, climate and soil measures of nutrient fertility. Glob. Ecol. Biogeogr. 2009, 18, 137–149. [Google Scholar] [CrossRef]
- Schwilk, D.W.; Ackerly, D.D. Flammability and serotiny as strategies: Correlated evolution in pines. Oikos 2001, 94, 326–336. [Google Scholar] [CrossRef] [Green Version]
- Moore, B.D.; Wallis, I.R.; Wood, J.T.; Foley, W.J. Foliar nutrition, site quality, and temperature influence foliar chemistry of tallowwood (Eucalyptus microcorys). Ecol. Monogr. 2004, 74, 553–568. [Google Scholar] [CrossRef]
- Ganteaume, A.; Romero, B. Does plant flammability vary according to terpene content throughout the year? In Proceedings of the Cultivating Pyrodiversity: 8th International Fire Ecology and Management Congress, Tuscon, AZ, USA, 18–22 November 2019; p. 31. [Google Scholar]
- Gaussen, H. Climatologie. In Annales de Géographie; Armand Colin: Paris, France, 1957; pp. 9–14. [Google Scholar]
- Quézel, P. Réflexions sur L’évolution de la Flore et de la Végétation au Maghreb Méditerranéen; Ibis Press Paris: Paris, France, 2000; Volume 1. [Google Scholar]
- Verdú, M.; Pausas, J. Fire drives phylogenetic clustering in Mediterranean Basin woody plant communities. J. Ecol. 2007, 95, 1316–1323. [Google Scholar] [CrossRef]
- Tapias, R.; Climent, J.; Pardos, J.A.; Gil, L. Life histories of Mediterranean pines. Plant Ecol. 2004, 171, 53–68. [Google Scholar] [CrossRef]
- Ne’eman, G.; Goubitz, S.; Nathan, R. Reproductive traits of Pinus halepensis in the light of fire—A critical review. Plant Ecol. 2004, 171, 69–79. [Google Scholar] [CrossRef]
- Thanos, C.; Daskalakou, E. Reproduction in Pinus halepensis and P. brutia. In Ecology, Biogeography and Management of Pinus halepensis and P. brutia Forest Ecosystems in the Mediterranean Basin; Backhuys Publishers: Leiden, The Netherlands, 2000; pp. 79–90. [Google Scholar]
- Maestre, F.T.; Cortina, J. Are Pinus halepensis plantations useful as a restoration tool in semiarid Mediterranean areas? For. Ecol. Manag. 2004, 198, 303–317. [Google Scholar] [CrossRef]
- Santos del Blanco, L.; Zas, R.; Notivol Paíno, E.; Chambel, M.R.; Majada, J.; Climent, J. Variation of early reproductive allocation in multi-site genetic trials of Maritime pine and Aleppo pine. For. Syst. 2010, 19, 381–392. [Google Scholar]
- Bede-Fazekas, Á.; Horváth, L.; Kocsis, M. Impact of climate change on the potential distribution of Mediterranean pines. Időjárás Q. J. Hung. Meteorol. Serv. 2014, 118, 41–52. [Google Scholar]
- Angelstam, P.; Kuuluvainen, T. Boreal forest disturbance regimes, successional dynamics and landscape structures: A European perspective. Ecol. Bull. 2004, 51, 117–136. [Google Scholar]
- Brumelis, G.; Elferts, D.; Liepina, L.; Luce, I.; Tabors, G.; Tjarve, D. Age and spatial structure of natural Pinus sylvestris stands in Latvia. Scand. J. For. Res. 2005, 20, 471–480. [Google Scholar] [CrossRef]
- Abadie, J.; Dupouey, J.-L.; Avon, C.; Rochel, X.; Tatoni, T.; Bergès, L. Forest recovery since 1860 in a Mediterranean region: Drivers and implications for land use and land cover spatial distribution. Landsc. Ecol. 2018, 33, 289–305. [Google Scholar] [CrossRef]
- White, R.H.; Zipperer, W.C. Testing and classification of individual plants for fire behaviour: Plant selection for the wildland–urban interface. Int. J. Wildland Fire 2010, 19, 213–227. [Google Scholar] [CrossRef]
- Ganteaume, A.; Jappiot, M.; Lampin-Maillet, C.; Curt, T.; Borgniet, L. Effects of vegetation type and fire regime on flammability of undisturbed litter in Southeastern France. For. Ecol. Manag. 2011, 261, 2223–2231. [Google Scholar] [CrossRef]
- Simeoni, A.; Thomas, J.; Bartoli, P.; Borowieck, P.; Reszka, P.; Colella, F.; Santoni, P.-A.; Torero, J.L. Flammability studies for wildland and wildland–urban interface fires applied to pine needles and solid polymers. Fire Saf. J. 2012, 54, 203–217. [Google Scholar] [CrossRef] [Green Version]
- Santoni, P.; Bartoli, P.; Simeoni, A.; Torero, J. Bulk and particle properties of pine needle fuel beds–influence on combustion. Int. J. Wildland Fire 2014, 23, 1076–1086. [Google Scholar] [CrossRef]
- Hachmi, M.; Sesbou, A.; Benjelloun, H.; Bouanane, F. Alternative equations to estimate the surface-to-volume ratio of different forest fuel particles. Int. J. Wildland Fire 2011, 20, 648–656. [Google Scholar] [CrossRef]
- Adams, R.P. Identification of Essential Oil Components by Gas Chromatography/Mass Spectrometry; Allured Publishing Corporation: Carol Stream, IL, USA, 2007; Volume 456. [Google Scholar]
- Breiman, L. Random forests. Mach. Learn. 2001, 45, 5–32. [Google Scholar] [CrossRef] [Green Version]
- Brieuc, M.S.; Waters, C.D.; Drinan, D.P.; Naish, K.A. A practical introduction to Random Forest for genetic association studies in ecology and evolution. Mol. Ecol. Resour. 2018, 18, 755–766. [Google Scholar] [CrossRef]
- Boulesteix, A.L.; Janitza, S.; Kruppa, J.; König, I.R. Overview of random forest methodology and practical guidance with emphasis on computational biology and bioinformatics. Wiley Interdiscip. Rev. Data Min. Knowl. Discov. 2012, 2, 493–507. [Google Scholar] [CrossRef] [Green Version]
- Kursa, M.B.; Rudnicki, W.R. Feature Selection with Boruta Package. J. Stat. Softw. 2010, 36, 1–13. [Google Scholar] [CrossRef] [Green Version]
- Genuer, R.; Poggi, J.-M.; Tuleau-Malot, C. VSURF: An R package for variable selection using random forests. R. J. 2015, 7, 19–33. [Google Scholar] [CrossRef] [Green Version]
- Salvatore, R.; Moya, D.; Pulido, L.; Lovreglio, R.; López-Serrano, F.; De las Heras, J.; Leone, V. Morphological and anatomical differences in Aleppo pine seeds from serotinous and non-serotinous cones. New For. 2010, 39, 329–341. [Google Scholar] [CrossRef]
- Keeley, J.E.; Pausas, J.G.; Rundel, P.W.; Bond, W.J.; Bradstock, R.A. Fire as an evolutionary pressure shaping plant traits. Trends Plant Sci. 2011, 16, 406–411. [Google Scholar] [CrossRef] [PubMed] [Green Version]
Flammability Variables | PHF | PHNF |
---|---|---|
Time-to-ignition PNH > PH | α-terpineol; cembrene | β-caryophyllene; cembrene; elemol; terpinolene; thujene |
Maximum temperature | α-humulene; β-caryophyllene; cembrene; germacrene-D; limonene; thujene | α-muurolene; α-terpineol; β-cadinene; caryophyllene-oxide; cembrene; elemol |
Flaming duration PHF > PHNF | α-pinene; α-terpinene; β-caryophyllene | α-muurolene; cembrene; valencene |
Flame height PHNF > PHF | α-muurolene; α-pinene; β-cadinene; camphene; caryophyllene-oxide; cembrene; elemol; γ-cadinene; germacrene-D; limonene; ocimene | α-muurolene; camphene; caryophyllene-oxide; cembrene; valencene |
Radiative peak | α-pinene; α-humulene; β-caryophyllene; β-pinene; camphene; caryophyllene-oxide; elemol; farnesen; terpinolene | α-muurolene; β-caryophyllene; limonene |
Consumed weight | α-humulene; α-muurolene; α-terpinene; β-pinene; β-cadinene β-caryophyllene; caryophyllene-oxide; elemol; farnesen | α-muurolene; limonene; thunbergol; valencene |
SHOOTS | PSF | PSNF |
---|---|---|
Time-to-ignition | α-pinene; α-terpineol, tricyclene | δ-3-carene; humulene; unknown-sequi-35,46 |
Maximum temperature PSF > PSNF | α-muurolene; α-terpinene; β-myrcene; borneol; elemene; γ-terpinene; unknown-sequi-34,5; tricyclene; valencene | δ-3-carene; α-terpineol; β-myrcene; borneol; unknown-sequi-34,5; unknown-sequi-35-46 |
Flaming duration | borneol; camphor; elemene | - |
Flame height | α-phellandrene; α-terpineol; β-myrcene; camphor; eucalyptol; tricyclene; valencene | Aromadendrene; unknown-sequi-35,46; ylangene |
Radiative peak PSF > PSNF | α-terpineol | - |
Consumed weight | δ-3-carene; camphene; unknown-sequi-35,46 | - |
PHF | PHNF | |
---|---|---|
Time-to-ignition PHNF > PHF | α-muurolene; α-terpinene; α-terpineol; farnesen; γ-terpinene; ocimene; thujene | β-cadinene; cembrene; limonene |
Maximum temperature | β-cadinene; camphene; elemol; ocimene; valencene | α-terpineol; β-cadinene; elemol; germacrene-D; ocimene |
Flaming duration PHNF > PHF | cembrene; elemol; γ-cadinene; germacrene-D; limonene | α-muurolene; β-cadinene; cembrene |
Flame height PHF > PHNF | α-pinene; α-terpineol; β-caryophyllene; camphene; germacrene-D; ocimene; valencene | α-humulene; α-pinene; α-terpineol; β-caryophyllene; camphene-; caryophyllene-oxide; limonene |
Rate of spread PHNF > PHF | cembrene | camphene; caryophyllene-oxide; germacrene-D; limonene; terpinolene; thujene; valencene |
Consumed weight PHF > PHNF | α-terpineol; camphene; ocimene; valencene | α-terpineol; β-cadinene; camphene; caryophyllene-oxide; cembrene; germacrene-D; terpinolene; valencene |
PSF | PSNF | |
---|---|---|
Time-to-ignition PSF > PSNF | α-copaene; α-terpineol; β-bourbonene; humulene; linalool | α-terpineol; linalool; mix-sesquiterpene |
Maximum temperature PSF > PSNF | δ-3-carene; α-bisabolol; α-cadinene; α-cadinol; α-copaene; α-cubebene; α-terpinene; β-bourbonene; borneol; camphor; elemene; eucalyptol; humulene; linalool; unknown-sequi-35,17; unknown-sequi-35,46; τ-cadinol; ylangene | α-phellandrene; α-terpineol; β-caryophyllene; unknown-sequi-35,46 |
Flame height PSNF > PSF | α-cadinol; α-terpineol; β-bourbonene; elemene; eucalyptol; humulene; linalool; ocymene; unknown-sequi-35,17; τ-cadinol; tricyclene | δ-3-carene; β-myrcene; β-caryophyllene; caryophyllene-oxide; linalool; nerol; tricyclene |
Flaming duration PSNF > PSF | α-terpineol; β-bourbonene; borneol; linalool; ylangene | - |
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Romero, B.; Ganteaume, A. Effect of Fire Frequency on the Flammability of Two Mediterranean Pines: Link with Needle Terpene Content. Plants 2021, 10, 2164. https://doi.org/10.3390/plants10102164
Romero B, Ganteaume A. Effect of Fire Frequency on the Flammability of Two Mediterranean Pines: Link with Needle Terpene Content. Plants. 2021; 10(10):2164. https://doi.org/10.3390/plants10102164
Chicago/Turabian StyleRomero, Bastien, and Anne Ganteaume. 2021. "Effect of Fire Frequency on the Flammability of Two Mediterranean Pines: Link with Needle Terpene Content" Plants 10, no. 10: 2164. https://doi.org/10.3390/plants10102164