The role of climate and disturbance regimes upon temperate rainforests during the Holocene: A stratigraphic perspective from Lago Fonk (-40 degrees S), northwestern Patagonia

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dc.contributor.authorHenriquez, Carla A.
dc.contributor.authorMoreno, Patricio, I
dc.contributor.authorLambert, Fabrice
dc.contributor.authorAlloway, Brent, V
dc.date.accessioned2024-01-10T13:10:05Z
dc.date.available2024-01-10T13:10:05Z
dc.date.issued2021
dc.description.abstractClimate and disturbance regimes play key roles in shaping the structure, composition and functioning of terrestrial ecosystems. Despite this importance, very few stratigraphic studies in the temperate rainforests from northwestern Patagonia have explored this relationship in detail along a time continuum through the entire Holocene. Here we present a high-resolution fossil pollen and charcoal record from Lago Fonk (median resolution: 20 years), a small closed-basin lake in the lowlands of the Chilean Lake District (41 degrees S), where wildfires and explosive volcanism have intermittently taken place during the Holocene, along with pronounced human-induced disturbance in post-colonial time. Our results show persistence of temperate rainforest throughout the Holocene, with changes in the composition and structure of Valdivian rainforests (VRF) at millennial timescales. We detect centennial-scale alternations in dominance between the VRF tree Eucryphia/Caldcluvia and generalist trees found in VRF and North Patagonian rainforests after-6.5 cal ka BP. Intervals dominated by VRF coincide with enhanced fire occurrence signaling negative hydroclimate anomalies with a mean duration of-150 years, which alternate with positive hydroclimate anomalies lasting-312 years on average. Our results suggest that the magnitude and rapidity of vegetation changes detected at 10.2-9.9, 4.0-3.0,-1.0, and-0.7 cal ka BP were amplified by disturbance regimes, and led to the establishment and maintenance of Eucryphia/Caldcluvia-dominated forests in the Longitudinal Valley of the Chilean Lake District. On several occasions the higher incidence of fire disturbance during warm/dry climate intervals coincided with episodes of heightened explosive volcanic activity from multiple eruptive centers within the Southern Andean Volcanic Zone. (c) 2021 Elsevier Ltd. All rights reserved.
dc.description.funderANID/Fondecyt
dc.description.funderFONDAP
dc.description.funderANID Millennium Science Initiative/Millennium Nucleus Paleoclimate
dc.description.funderBeca Doctorado Nacional 2014-Conicyt
dc.description.funderproject ANID/Fondecyt
dc.description.funderproject ANID/Fondap
dc.fechaingreso.objetodigital08-04-2024
dc.format.extent17 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.quascirev.2021.106890
dc.identifier.eissn1873-457X
dc.identifier.issn0277-3791
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2021.106890
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77765
dc.identifier.wosidWOS:000643686400003
dc.information.autorucFacultad de Historia, Geografía y Ciencia Política; Lambert No Informado, Fabrice; S/I; 250043
dc.language.isoen
dc.nota.accesoContenido parcial
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.revistaQUATERNARY SCIENCE REVIEWS
dc.rightsacceso restringido
dc.subjectFire disturbance
dc.subjectExplosive volcanism
dc.subjectPollen analysis
dc.subjectLake sediment cores
dc.subjectCentennial
dc.subjectmillennial-scale variability
dc.subjectFIRE REGIMES
dc.subjectVEGETATION
dc.subject43-DEGREES-S
dc.subjectVARIABILITY
dc.subjectCIRCULATION
dc.subjectWESTERLIES
dc.subjectSHIFTS
dc.subjectEPOCH
dc.subjectAGE
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleThe role of climate and disturbance regimes upon temperate rainforests during the Holocene: A stratigraphic perspective from Lago Fonk (-40 degrees S), northwestern Patagonia
dc.typeartículo
dc.volumen258
sipa.codpersvinculados250043
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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