Evidence of Neogene wildfires in central Chile: Charcoal records from the Navidad Formation

Abarzúa, Ana M.; Vargas, Camila Lehnhart; Jarpa, Leonora; Gutiérrez, Néstor M.; Hinojosa, Luis Felipe; Paula, Susana

doi:10.1016/j.palaeo.2016.06.036

Cited by 13 publications

(5 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…caven where simulated cattle ingestion did not influence seed germination [ 61 ], nor heat-shock treatments (this study), but plant-derived smoke can break its seed dormancy [ 35 ]. Therefore, the possibility of fire adaptations among native matorral species cannot be discarded considering the recent discovery of Miocene fires [ 29 ] and the selection of heritable seed traits by anthropogenic fires in a native annual [ 4 – 5 ].…”

Section: Discussionmentioning

confidence: 99%

“…Although natural fires were relatively common through the Miocene [29], the Andean uplift in the late-Miocene formed an effective barrier to westward storms. This barrier, together with the decrease in the air temperature due to the cold Humboldt oceanic current, reduced the frequency of lightning, and thus the occurrence of lightning-initiated fires [10, 30–31].…”

Section: Introductionmentioning

confidence: 99%

“…Mediterranean-type ecosystems of Central Chile (the matorral) stand out among the other MTE because their current fire regime is recent (Holocene) and mainly driven by human activities [ 27 – 28 ]. Although natural fires were relatively common through the Miocene [ 29 ], the Andean uplift in the late-Miocene formed an effective barrier to westward storms. This barrier, together with the decrease in the air temperature due to the cold Humboldt oceanic current, reduced the frequency of lightning, and thus the occurrence of lightning-initiated fires [ 10 , 30 – 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…The extent to which this complex fire history has affected the fire adaptations of plants remains to be explored in detail. The existence of lignotubers in native woody species (a specialized postfire resprouting organ; [ 6 , 18 , 32 ]) and the low recruitment of seedlings observed in burned areas [ 33 ], suggest that a reduction in fire frequency during the Holocene (compared to Early-Middle Miocene [ 29 ]) might have caused the loss of seeder syndromes [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Postfire responses of the woody flora of Central Chile: Insights from a germination experiment

et al. 2017

Self Cite

View full text Add to dashboard Cite

Fire is a selective agent shaping plant traits and community assembly in fire-prone ecosystems. However, in ecosystems with no fire history, it can be a cause of land degradation when it is suddenly introduced by humans, as plant species may not be able to respond to such novel disturbance. Unlike other Mediterranean-type ecosystems (MTE) of the world, natural fires have not been frequent during the Quaternary in the matorral of Central Chile, and thus, plant adaptive responses are expected to be uncommon. We evaluated the effect of heat shock on seed survival and germination of 21 native woody plants of the Chilean matorral and compiled information on smoke-stimulation and resprouting, to evaluate the importance of fire-adaptive responses in the context of the other MTE. We found that in the Chilean woody flora negative seed responses to fire cues were more frequent than positive responses. Although resprouting is a relatively widespread trait, fire-stimulated germination is not as common in the Chilean matorral as in other MTE. The seeds of seven endemic species were strongly damaged by fire cues and this should be considered in post-fire restoration planning. However, our results also showed that many species were resistant to elevated doses of heat shock and in some, germination was even stimulated. Thus, future research should focus on the evolutionary causes of these responses. These findings could help to develop strategies for fire management in the Chilean matorral. In addition, they will improve our understanding of the evolutionary forces that shaped this plant community and to better frame this region among the other MTE worldwide.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Postfire responses of the woody flora of Central Chile: Insights from a germination experiment

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Aunque en todas las ETM la frecuencia de incendios ha aumentado debido a actividades humanas, Chile Central se diferencia de los demás ETM porque su régimen actual de incendios es reciente (Holoceno) (Aravena et al 2003, Montenegro et al 2004, Gómez-González et al 2017, Gómez-González 2018. Sin embargo, existe evidencia (Abarzúa et al 2016) de la ocurrencia de incendios naturales en el centro de Chile durante el Neógeno, lo que pudo haber generado algunos atributos adaptativos en la flora de Chile central, por ejemplo, la capacidad de rebrotar vegetativamente después de incendios. La baja frecuencia de incendios forestales naturales durante el holoceno tardío en esta región se explica por la escasez de fuentes de ignición no antropogénica, como los relámpagos (Montenegro et al 2003).…”

Section: Introductionunclassified

Dinámica post-incendio de la vegetación en la localidad de Rastrojos, Chile central

2022

View full text Add to dashboard Cite

Los incendios son un tipo de perturbación frecuente en muchos ecosistemas, con fuertes consecuencias para la vegetación. A pesar de lo común de los incendios en Chile central, pocos trabajos han monitoreado los cambios en la vegetación después de ocurridos. En este trabajo se describe la dinámica de la vegetación en la localidad de Rastrojos, región del Maule, después del mega-incendio ocurrido el verano de 2017 en Chile central. En septiembre de 2018 se muestreó la composición y densidad de la regeneración de especies leñosas, diferenciando si provenían desde semilla o rebrote vegetativo, y la cobertura de estratas vegetacionales leñosa y herbácea, en cuadrantes que volvieron a muestrearse en septiembre de 2020. También se evaluó la abundancia de individuos adultos sobrevivientes al incendio. Se observó una rápida, diversa y abundante regeneración vegetativa después del incendio. La regeneración desde semilla, aunque presente, fue menor en riqueza y densidad. La cobertura leñosa y herbácea mostraron una rápida recuperación post-incendio. Si bien se produjo un pulso inicial importante de recuperación de la vegetación, después de un año y medio desde el incendio, la diversidad, abundancia y cobertura dejaron de aumentar, sugiriendo un estancamiento de la recuperación. Sólo la abundancia de especies exóticas leñosas continuó aumentando con el tiempo post-incendio. Nuestros resultados sugieren que la vegetación leñosa se recupera rápidamente después de incendios, mayoritariamente desde regeneración vegetativa. Proponemos que la restauración post-incendio en Chile central debe basarse principalmente en estrategias pasivas, aunque se requiere enriquecimiento en sitios abiertos sin rebrote vegetativo.

show abstract

Evidence for the repeated occurrence of wildfires in an upper Pliocene lignite deposit from Yunnan, SW China

Liu

Spiekermann

Zhao

et al. 2022

International Journal of Coal Geology

View full text Add to dashboard Cite

Evidence of Neogene wildfires in central Chile: Charcoal records from the Navidad Formation

Cited by 13 publications

References 50 publications

Postfire responses of the woody flora of Central Chile: Insights from a germination experiment

Postfire responses of the woody flora of Central Chile: Insights from a germination experiment

Dinámica post-incendio de la vegetación en la localidad de Rastrojos, Chile central

Evidence for the repeated occurrence of wildfires in an upper Pliocene lignite deposit from Yunnan, SW China

Contact Info

Product

Resources

About