Impacts of a short-interval severe fire on forest structure and regeneration in a temperate Andean Araucaria-Nothofagus forest

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dc.article.number93
dc.catalogadoryvc
dc.contributor.authorArroyo Vargas, Paola Andrea
dc.contributor.authorBusby, Sebastian
dc.contributor.authorVeblen, Thomas T.
dc.contributor.authorGonzález, Mauro E.
dc.contributor.authorHolz, Andrés
dc.contributor.otherPontificia Universidad Católica de Chile. Centro Nacional de Excelencia para la Industria de la Madera (CENAMAD)
dc.date.accessioned2024-10-14T21:45:14Z
dc.date.available2024-10-14T21:45:14Z
dc.date.issued2024
dc.date.updated2024-10-13T00:02:55Z
dc.description.abstractBackground Warmer climate conditions are altering fire regimes globally, eroding the capacity of forest ecosystems to resist and recover from natural disturbances like wildfire. Severe and rapidly repeated wildfires are promoting tree regeneration failure of obligate-seeders and/or fire-sensitive species in temperate forests of the Southern Hemisphere. We collected post-fire field data to evaluate whether forest structure and tree regeneration responses varied between two Andean forest study areas dominated by the threatened Gondwanan conifer Araucaria araucana and Nothofagus species (southern beeches) — one area burned once, the other reburned after 13 years. Results Tree mortality was high across species after a single high severity and/or repeated wildfire, although some A. araucana trees were able to survive both events. Post-fire seedling regeneration of A. araucana and Nothofagus spp. was poor in areas affected by severe wildfires, and the latter was absent from reburned plots. A key driver of this regeneration failure was increasing distance to live seed source trees, which was negatively correlated with these species’ post-fire seedling abundances. In contrast, species with the capacity to regenerate via resprouting (A. araucana, N. alpina, N. obliqua) did so after a single high severity fire; however, only a single Nothofagus species (N. alpina) resprouted abundantly after a reburn. Conclusions Our findings suggest that high severity and short-interval fires can drastically change the structure of and limit post-fire tree regeneration in Araucaria-Nothofagus forests, promoting alternative post-fire forest ecosystem trajectories. Resprouting species of the Nothofagus genus, especially N. alpina, exhibit the greatest resilience to these emerging fire patterns. These forests are currently facing an unprecedented climatic shift toward greater fire activity, where resprouting is the favored regeneration strategy. If the occurrence of severe and short-interval fires increases in the coming decades, as predicted, we expect Araucaria-Nothofagus forests to shift toward a drier, more flammable shrubland ecosystem state.
dc.fechaingreso.objetodigital2024-10-13
dc.format.extent20 páginas
dc.fuente.origenAutoarchivo
dc.identifier.citationFire Ecology. 2024 Oct 09;20(1):93
dc.identifier.doi10.1186/s42408-024-00327-2
dc.identifier.urihttps://doi.org/10.1186/s42408-024-00327-2
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/88212
dc.identifier.wosidWOS:001338522400001
dc.information.autorucS/I; Arroyo Vargas Paola Andrea; S/I; 1337015
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaFire Ecology
dc.rightsacceso abierto
dc.rights.holderThe Author(s)
dc.rights.licenseCC BY Atribución Internacional 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAraucaria araucana
dc.subjectForest fres
dc.subjectForest regeneration
dc.subjectMonkey puzzle tree
dc.subjectNothofagus species
dc.subjectPost-fre regeneration
dc.subjectShort-interval fres
dc.subjectSouthern hemisphere temperate forests
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods15 Life on land
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleImpacts of a short-interval severe fire on forest structure and regeneration in a temperate Andean Araucaria-Nothofagus forest
dc.typeartículo
dc.volumen20
sipa.codpersvinculados1337015
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