Flora y vegetación de la Reserva Nacional Lago Peñuelas, Reserva de la Biósfera, Región de Valparaíso, Chile

Hauenstein, Enrique; Muñoz‐Pedreros, Andrés; Yáñez, José; Sánchez, Pedro Mascaro; Möller, Patricia; Guiñez, Basilio; Gil, Claúdia Aranha

doi:10.4067/s0717-92002009000300006

Cited by 19 publications

(6 citation statements)

References 16 publications

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“…The geo-climatic characteristics and distribution of plant species, in addition to the impact of fire in the area, have been described by Guerrero et al, 2020 [ 6 ] and Hauenstein et al [ 65 ]. During 2018, the study area registered an average annual temperature of 13.4 °C and a total accumulated precipitation of 257.1 mm, according to the database of the Rodelillo Meteorological Station, located 13 km north of the sampling location (National code 330007, Directorate Meteorological of Chile) [ 66 ].…”

Section: Methodsmentioning

confidence: 99%

Leaf Thermal and Chemical Properties as Natural Drivers of Plant Flammability of Native and Exotic Tree Species of the Valparaíso Region, Chile

Guerrero

Hernández

Toledo

et al. 2021

IJERPH

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Forest fires are one of the main environmental threats in Chile. Fires in this Mediterranean climate region frequently affect native forests and exotic plantations, including in several cases urban and rural settlements. Considering the scarcity of information regarding the fire response dynamics of tree species that are frequently affected by fires, this study aims to establish a flammability classification according to the evolution of the fire initiation risk presented by the most affected forest species in the Valparaíso region. Three exotic species, Eucalyptus globulus, Pinus radiata, and Acacia dealbata, and two native species, Cryptocarya alba and Quillaja saponaria, were studied. Flammability assays indicate that E. globulus, A. dealbata, and C. alba are extremely flammable, whereas P. radiata and Q. saponaria are flammable. Furthermore, E. globulus and A. dealbata have the highest heating values while Q. saponaria has the lowest values. The extreme flammability of E. globulus, A. dealbata, and C. alba indicates a high susceptibility to ignite. Furthermore, the high heat of combustion of E. globulus and A. dealbata can be associated with a high energy release, increasing the risk of fires spreading. In contrast, Q. saponaria has the lowest predisposition to ignite and capacity to release heat. Accordingly, this work shows that all studied tree species contain organic metabolites that are potentially flammable (sesquiterpenes, aliphatic hydrocarbons, alcohol esters, ketones, diterpenes, and triterpenes) and can be considered as drivers of flammability in vegetation. Finally, these preliminary results will aid in the construction of more resilient landscapes in the near future.

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Section: Methodsmentioning

confidence: 99%

Leaf Thermal and Chemical Properties as Natural Drivers of Plant Flammability of Native and Exotic Tree Species of the Valparaíso Region, Chile

Guerrero

Hernández

Toledo

et al. 2021

IJERPH

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“…The phytosociology of the zone indicates that the woody vegetation is composed of open hawthorn and mixed sclerophyllous scrub. Herbaceous plantations are distributed in dry grasslands, wet grasslands, cattails, and cypress and aquatic communities in the lake [36] E. globulus is the most abundant species in the Valparaíso region, and also within the PLNR, accounting for 1,712.2 ha, while plantations of other exotic species are distributed as follows: 499.9 ha for P. radiata, 79.3 ha for A. dealbata, 32.5 ha for E. globulus-P. radiata, and 4.8 ha for A. melanoxylon-A. dealbata [34].…”

Section: Study Area and Leaf Samplingmentioning

confidence: 99%

Drivers of Flammability of Eucalyptus globulus Labill Leaves: Terpenes, Essential Oils, and Moisture Content

Guerrero

Carmona

Hernández

et al. 2022

Forests

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Mediterranean climate regions have become more vulnerable to fire due to the extreme weather conditions and numerous Eucalyptus globulus plantation areas. The aim of this study is to analyze the fire hazard related to E. globulus in a forest fire scenario, based on the contrast of thermochemical parameters and their relationship with chemical properties, considering the predominant exotic forest species (E. globulus, Pinus radiata, Acacia dealbata, and Acacia melanoxylon) present in the Valparaiso region, Chile. The results revealed that although all of the studied species were highly flammable, E. globulus was extremely flammable, as its leaves contain high concentrations of essential oils, monoterpenes, and sesquiterpenes, which can generate a flammable atmosphere due to their low flashpoint and the strong negative influence shown between the essential oils, volatile terpenes, and limonene concentration. Moreover, the heat of combustion of E. globulus was positively correlated with its high essential oil contents. Finally, all of the studied species had low flashpoints and high heating values; therefore, they are predisposed to ignite in the presence of a heat source, releasing high amounts of energy during combustion, which contributes to the risk of the formation and spread of canopy fires among these tree formations.

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“…Other tree species within this fragment were Cryptocarya alba (Molina) Looser, Peumus boldus Molina, and Schinus latifolius Engl. (Hauenstein et al 2009). In the savanna of A. caven there were no other tree species, and A. caven trees were 2-5 m height, isolated, discontinuously distributed, and their canopies covered approximately 30% of the savanna in the locality.…”

Section: Study Area and Speciesmentioning

confidence: 99%

Seed dispersal distance, seed morphology, and recruitment in the Chilean sclerophyllous tree Quillaja saponaria: implications for passive restoration in a semiarid ecosystem

et al. 2021

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Recolonization of wind-dispersed tree species in degraded areas may decline with distance from remnant forest fragments because seed rain frequently decreases with distance from the seed source. However, regeneration of these species may be even more limited to sites close to the seed source if dispersal distance is negatively affected by seed mass, and germination probability is positively affected by seed mass. We evaluated these hypotheses in a Mediterranean-type ecosystem of central Chile, using the wind-dispersed tree species Quillaja saponaria. We assessed the seed rain curve in a degraded open area adjacent to a remnant forest fragment of this species, and related seed mass with dispersal distance from the seed source. Then, we evaluated the relationship between seed mass, germination, and seedling growth, and if seeds that fall nearer the seed source have greater germination probability. We found a decreasing seed rain with the distance from the seed source. Seed mass was not related to dispersal distance, although seeds with higher wing area dispersed further. Germination probability was Communicated by Michelle Tedder.

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Flora y vegetación de la Reserva Nacional Lago Peñuelas, Reserva de la Biósfera, Región de Valparaíso, Chile

Cited by 19 publications

References 16 publications

Leaf Thermal and Chemical Properties as Natural Drivers of Plant Flammability of Native and Exotic Tree Species of the Valparaíso Region, Chile

Leaf Thermal and Chemical Properties as Natural Drivers of Plant Flammability of Native and Exotic Tree Species of the Valparaíso Region, Chile

Drivers of Flammability of Eucalyptus globulus Labill Leaves: Terpenes, Essential Oils, and Moisture Content

Seed dispersal distance, seed morphology, and recruitment in the Chilean sclerophyllous tree Quillaja saponaria: implications for passive restoration in a semiarid ecosystem

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