Oleoresin flow and chemical composition of Corsican pine (Pinus nigra subsp. laricio) in response to prescribed burnings

Cannac, Magali; Barboni, Toussaint; Ferrat, Lila; Bighelli, Ange; Castola, Vincent; Costa, Jean; Trecul, D.; Morandini, Frédéric; Pasqualini, Vanina

doi:10.1016/j.foreco.2008.11.017

Cited by 37 publications

(23 citation statements)

References 43 publications

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“…In addition, the fire was controlled and less intense than a forest fire. Furthermore, during prescribed burning, the fires are of low intensity, ranging from 27 to 57 kW m −1 (Byram's intensity; Cannac et al, 2009). These conditions result in low combustion efficiency, and therefore the concentration of evolved gases is higher.…”

Section: Analytical Results and Risk Assessmentmentioning

confidence: 99%

Quantification of volatile organic compounds in smoke from prescribed burning and comparison with occupational exposure limits

Romagnoli

Barboni

Santoni

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Prescribed burning represents a serious threat to personnel fighting fires due to smoke inhalation. The aim of this study was to investigate exposure by foresters to smoke from prescribed burning, focusing on exposure to volatile organic compounds (VOCs). The methodology for smoke sampling was first evaluated. Potentially dangerous compounds were identified among the VOCs emitted by smoke fires at four prescribed burning plots located around Corsica. The measured mass concentrations for several toxic VOCs were generally higher than those measured in previous studies due to the experimental framework (short sampling distance between the foresters and the flame, low combustion, wet vegetation). In particular, benzene, phenol and furfural exceeded the legal short-term exposure limits published in Europe and/or the United States. Other VOCs such as toluene, ethybenzene or styrene remained below the exposure limits. In conclusion, clear and necessary recommendations were made for protection of personnel involved in fighting fires.

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Section: Analytical Results and Risk Assessmentmentioning

confidence: 99%

Quantification of volatile organic compounds in smoke from prescribed burning and comparison with occupational exposure limits

Romagnoli

Barboni

Santoni

et al. 2014

Nat. Hazards Earth Syst. Sci.

Self Cite

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“…Various methods for increasing resin yield have been considered, including genetic improvement (La resina, 2009), fertilization, wounding and fungal inoculation (Knebel et al, 2008), the use of stimulant pastes containing active components such as sulphuric acid and an ethylene precursor (CEPA) (Rodrigues et al, 2008;Pio and Valente, 1998), prescribed burnings (Cannac et al, 2009), metal adjuvants (Rodrigues et al, 2011), and others. In the study by Novick et al (2012) on Pinus taeda L., better soil nutrient availability, i.e.…”

Section: Discussion Razpravamentioning

confidence: 99%

Resin yield of Pinus nigra and Pinus sylvestris in the Slovenian Karst

Gajšek¹,

Brecelj²,

Jarni³

et al. 2018

Acta Silvae et Ligni

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The aim of our research was to study the impact of various environmental factors on the resin production of pines in the Slovenian Karst. Five plots were established -three in Pinus nigra (Arnold) stands and two in Pinus sylvestris (L.) stands. On each plot, the 19-20 most vigorous dominant or codominant trees with a minimum diameter at breast height (DBH) of 20 cm were selected and their resin yield analysed in 2012. Resin yield in P. nigra was considerably higher than that in P. sylvestris. The average resin yield per tree during the study period of 102 days was 1.144 kg for P. nigra and 0.612 for P. sylvestris. There were substantial differences in resin yield among individual trees in the study period: 0.336-2.487 kg for P. nigra and 0.249-1.270 kg for P. sylvestris. The resin yield in P. nigra was considerably higher for the trees with larger DBH, while this was not the case in P. sylvestris. Tree species was the most important factor in resin yield. Increased precipitation resulted in higher resin yields on most plots, whereas better site productivity positively affected resin yield on all P. nigra plots but not on P. sylvestris plots.Key words: black pine, Scots pine, resin production, resin yield, Slovenian Karst IZVLEČEK Namen naše raziskave je bil proučiti vpliv različnih dejavnikov na proizvodnjo borove smole na Krasu v Sloveniji. Za ta namen smo določili 5 raziskovalnih ploskev, in sicer tri ploskve v sestojih črnega bora (Pinus nigra Arnold) in dve v sestojih rdečega bora (Pinus sylvestris L.). Proizvodnjo smole smo spremljali v letu 2012, ko smo na vsaki ploskvi izbrali 19 -20 dominantnih ali kodominantnih dreves z minimalnim prsnim premerom 20 cm. Analiza je pokazala, da je proizvodnja smole pri črnem boru značilno večja kot pri rdečem boru. Povprečna količina smole na drevo v času periodičnega spremljanja 102 dni je pri črnem boru dosegala 1,144 kg in pri rdečem boru 0,612 kg. Variabilnost v proizvodnji smole je bila znotraj vrste velika, pri črnem boru med 0,336 -2,487 kg in pri rdečem med 0,249 -1,270 kg. Pri črnem boru je bila količina proizvedene smole v pozitivni povezavi z debelino drevesa, medtem ko pri rdečem boru te odvisnosti nismo potrditi. Na količino smole pri črnem boru pozitivno vpliva produktivnost rastišča. Ugotovili smo, da na smoljenje črnega bora pozitivno vpliva količina padavin, medtem ko višje dnevne temperature dnevni donos smole zmanjšujejo.Ključne besede: črni bor, rdeči bor, smolarjenje, donos smole, Kras

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“…A thermal stress can cause marked peaks in flavonoid levels (De Abreu and Mazzafera 2005), as was observed in our study. Prescribed burnings are characterised by temperatures below 1,000°C, flame length of about 25 cm and residence time (above 60°C) of less than 400 s (Cannac et al 2009a), and these burnings caused flavonoids to increase for a period of less than 1 year. On the other hand, one of the main environmental factors affecting plant growth, productivity, and survival is water status; water stress also influences flavonoid production (Dixon and Paiva 1995;De Abreu and Mazzafera 2005).…”

Section: Total Flavonols (Mg G-1)mentioning

confidence: 99%

“…Further, there was no significant additional increase in flavonols after repeated similar burnings separated by an interval of at least 3 years. We ensured that physical parameters of the two prescribed burnings were similar (Cannac et al 2009a). The return of flavonol contents to normal within 1 year indicates that the use of prescribed burnings at 3-year intervals can be considered a good forest management tool.…”

Section: Total Flavonols (Mg G-1)mentioning

confidence: 99%

“…One year after prescribed burning, P. laricio flavonols return to pre-burn levels and the trees appear to be otherwise unaffected. At our present level of understanding, the use of prescribed burning across litter loadings below 1 kg m -2 (Cannac et al 2009a) at 3-year intervals can be recommended to reduce fuel loads with minimal impact on trees. However, prescribed burning must be used judiciously, and further studies on primary and secondary plant metabolism must be carried out in order to fully understand the stress undergone by the tree in response to prescribed burning.…”

Section: Total Flavonols (Mg G-1)mentioning

confidence: 99%

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Identification of flavonoids in Pinus Laricio needles and changes occurring after prescribed burning

et al. 2010

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Prescribed burning is increasingly being used as a fire prevention tool in forest management; however, it can cause thermal stress to trees. Its effects on pine physiology have been poorly understood. Flavonoids are highly indicative of plants' responses to environmental stress, and in this study, we used flavonoid concentrations in pine needles to assess fire impact on a Corsican Pinus laricio Poir. forest up to 4 years after prescribed burning. This is the first study that highlighted the presence of flavonols in P. laricio and indicated kaempferol to be the major compound. The total flavonol content increased by 60% 3 months after 1 or 2 prescribed low-intensity burnings and returned to the pre-burning level after 1 year. This suggests that thermal stress events caused defensive production of flavonoids. Prescribed burnings performed at 3-year intervals did not appear to alter flavonoid levels. In the light of these findings, forest managers may consider the use of prescribed burning at 3-year intervals as a means to reduce fuel loads, while minimizing the impact on P. laricio.

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Oleoresin flow and chemical composition of Corsican pine (Pinus nigra subsp. laricio) in response to prescribed burnings

Cited by 37 publications

References 43 publications

Quantification of volatile organic compounds in smoke from prescribed burning and comparison with occupational exposure limits

Quantification of volatile organic compounds in smoke from prescribed burning and comparison with occupational exposure limits

Resin yield of Pinus nigra and Pinus sylvestris in the Slovenian Karst

Identification of flavonoids in Pinus Laricio needles and changes occurring after prescribed burning

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