Historia vegetal y regímenes de fuego recientes de la turbera costera de Chepu, Isla Grande de Chiloé, Chile

Castro, J.; Saldaña, Alfredo; Rondanelli-Reyes, Mauricio J.

doi:10.4067/s0717-66432015000200014

Cited by 1 publication

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“…The absence of aquatic taxa in this period suggests a moisture shortage in the system, with only traces of marsh taxa that reveal to a certain extent the amphibious nature of the system (Troncoso et al, 2015). The low abundance of taxa characteristic of the Chiloé forest, represented in the diagram by Myrceugenia and Amomyrtus , and the gradual decrease of Elaeocarpaceae both indicate a decrease in precipitation and an increase in temperature.…”

Section: Discussionmentioning

confidence: 99%

A new multi-proxy record of environmental change over the last 1000 years on Chiloé Island: Lake Pastahué, south-central Chile (42°S)

et al. 2018

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Knowledge of past environmental and climatic conditions of lake ecosystems on Chiloé Island on a millennial scale is limited. Hence, this study fills a gap in our understanding of this part of southern Chile. The aim of this study was to reconstruct the environmental and climatic history of the last 1000 years of Lake Pastahué through a multi-proxy sediment core analysis. The 1-m-long core was subsampled every centimeter for the organic matter, magnetic susceptibility, grain-size distribution, and biological indicator (pollen, chironomids) analyses. The age model was constructed from 210Pb, 137Cs, and 14C activity. Pollen results revealed a North Patagonian forest composition represented by Nothofagus, Weinmannia, Drimys, Tepualia, Myrtaceae, Poaceae, and Pteridophyta. The abundance of Rumex and Pinus in the most recent part of the pollen assemblage reflects a clear anthropogenic impact. The sedimentological parameters and chironomid assemblage show similar variations, which highlight changes in the trophic state of the lake. The changes observed in all proxies suggest the influence of climate events such as the ‘Medieval Climate Anomaly’ (MCA) and ‘Little Ice Age’ (LIA). The variations observed since the beginning of the 20th century could be the result of the combined effect of anthropogenic activities and the increase in temperature recorded in south-central Chile and Patagonia.

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Section: Discussionmentioning

confidence: 99%

A new multi-proxy record of environmental change over the last 1000 years on Chiloé Island: Lake Pastahué, south-central Chile (42°S)

et al. 2018

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show abstract

Historia vegetal y regímenes de fuego recientes de la turbera costera de Chepu, Isla Grande de Chiloé, Chile

Abstract: La reconstrucción de la vegetación a través del análisis polínico y los regímenes de incendio inferidos a partir de partículas de carbón son de gran importancia para el estudio de fenómenos climáticos pasados, tales

Cited by 1 publication

References 34 publications

A new multi-proxy record of environmental change over the last 1000 years on Chiloé Island: Lake Pastahué, south-central Chile (42°S)

A new multi-proxy record of environmental change over the last 1000 years on Chiloé Island: Lake Pastahué, south-central Chile (42°S)

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