Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina
We present pollen and spore analysis from a peat-bog section from southwestern Isla de los Estados (Staaten Island), Tierra del Fuego to better understand late-Holocene environmental change in southernmost Patagonia. The island's position as the easternmost landmass at the southernmost of South...
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ftconicet:oai:ri.conicet.gov.ar:11336/58637 2023-10-09T21:47:15+02:00 Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina Ponce, Juan Federico Borromei, Ana Maria Menounos, Brian Rabassa, Jorge Oscar application/pdf http://hdl.handle.net/11336/58637 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618215301415 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2016.04.016 http://hdl.handle.net/11336/58637 Ponce, Juan Federico; Borromei, Ana Maria; Menounos, Brian; Rabassa, Jorge Oscar; Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina; Pergamon-Elsevier Science Ltd; Quaternary International; 442; Parte A; 23-6-2017; 26-34 1040-6182 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ POLLEN CLIMATE CHANGE ISLA DE LOS ESTADOS LATE HOLOCENE LITTLE ICE AGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.quaint.2016.04.016 2023-09-24T18:24:00Z We present pollen and spore analysis from a peat-bog section from southwestern Isla de los Estados (Staaten Island), Tierra del Fuego to better understand late-Holocene environmental change in southernmost Patagonia. The island's position as the easternmost landmass at the southernmost of South America, places it squarely within the influence of the southern westerly winds (SWW) and the Antarctic Circumpolar Current, and so makes the island a unique location to document the palaeoecological response to climate change during the late Quaternary. We compare our Nothofagus pollen record from Bahía Franklin with other Nothofagus pollen records from Isla de los Estados and Tierra del Fuego. Nothofagus has been shown to respond to changes in mean annual temperature in the southern latitudes under cooler climate with little seasonality in precipitation. We also evaluate the correspondence between these changes in vegetation to other late-Holocene environmental proxies that include variations in sea surface temperature (SST) from the Beagle Channel and records of past glacier fluctuations. Our results show that low concentrations of Nothofagus pollen existed at Bahía Franklin at about 4000 cal yr BP. Climate ameliorated between ca. 3500 and 500 cal yr BP based on an increase in frequency and concentration values of Nothofagus and Drimys winteri. Between about 500 and 50 cal yr BP, the pollen record revealed a noticeable decline in the forest density. We interpret the decline in forest density in Isla de los Estados between 500 and ∼50 yr cal BP as a response to cold and windy conditions during the Little Ice Age (LIA). Our interpretation from our Nothofagus pollen record broadly agrees with regional cooling recorded in reconstructed SST of the Beagle Channel and with glacier expansion in the Fuegian Cordillera. Fil: Ponce, Juan Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del ... Article in Journal/Newspaper Antarc* Antarctic Antártida Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Austral Patagonia Argentina Quaternary International 442 26 34 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
POLLEN CLIMATE CHANGE ISLA DE LOS ESTADOS LATE HOLOCENE LITTLE ICE AGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
POLLEN CLIMATE CHANGE ISLA DE LOS ESTADOS LATE HOLOCENE LITTLE ICE AGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Ponce, Juan Federico Borromei, Ana Maria Menounos, Brian Rabassa, Jorge Oscar Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina |
topic_facet |
POLLEN CLIMATE CHANGE ISLA DE LOS ESTADOS LATE HOLOCENE LITTLE ICE AGE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
We present pollen and spore analysis from a peat-bog section from southwestern Isla de los Estados (Staaten Island), Tierra del Fuego to better understand late-Holocene environmental change in southernmost Patagonia. The island's position as the easternmost landmass at the southernmost of South America, places it squarely within the influence of the southern westerly winds (SWW) and the Antarctic Circumpolar Current, and so makes the island a unique location to document the palaeoecological response to climate change during the late Quaternary. We compare our Nothofagus pollen record from Bahía Franklin with other Nothofagus pollen records from Isla de los Estados and Tierra del Fuego. Nothofagus has been shown to respond to changes in mean annual temperature in the southern latitudes under cooler climate with little seasonality in precipitation. We also evaluate the correspondence between these changes in vegetation to other late-Holocene environmental proxies that include variations in sea surface temperature (SST) from the Beagle Channel and records of past glacier fluctuations. Our results show that low concentrations of Nothofagus pollen existed at Bahía Franklin at about 4000 cal yr BP. Climate ameliorated between ca. 3500 and 500 cal yr BP based on an increase in frequency and concentration values of Nothofagus and Drimys winteri. Between about 500 and 50 cal yr BP, the pollen record revealed a noticeable decline in the forest density. We interpret the decline in forest density in Isla de los Estados between 500 and ∼50 yr cal BP as a response to cold and windy conditions during the Little Ice Age (LIA). Our interpretation from our Nothofagus pollen record broadly agrees with regional cooling recorded in reconstructed SST of the Beagle Channel and with glacier expansion in the Fuegian Cordillera. Fil: Ponce, Juan Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del ... |
format |
Article in Journal/Newspaper |
author |
Ponce, Juan Federico Borromei, Ana Maria Menounos, Brian Rabassa, Jorge Oscar |
author_facet |
Ponce, Juan Federico Borromei, Ana Maria Menounos, Brian Rabassa, Jorge Oscar |
author_sort |
Ponce, Juan Federico |
title |
Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina |
title_short |
Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina |
title_full |
Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina |
title_fullStr |
Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina |
title_full_unstemmed |
Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina |
title_sort |
late-holocene and little ice age palaeoenvironmental change inferred from pollen analysis, isla de los estados, argentina |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/58637 |
geographic |
Antarctic The Antarctic Austral Patagonia Argentina |
geographic_facet |
Antarctic The Antarctic Austral Patagonia Argentina |
genre |
Antarc* Antarctic Antártida Tierra del Fuego |
genre_facet |
Antarc* Antarctic Antártida Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1040618215301415 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2016.04.016 http://hdl.handle.net/11336/58637 Ponce, Juan Federico; Borromei, Ana Maria; Menounos, Brian; Rabassa, Jorge Oscar; Late-Holocene and Little Ice Age palaeoenvironmental change inferred from pollen analysis, Isla de los Estados, Argentina; Pergamon-Elsevier Science Ltd; Quaternary International; 442; Parte A; 23-6-2017; 26-34 1040-6182 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.quaint.2016.04.016 |
container_title |
Quaternary International |
container_volume |
442 |
container_start_page |
26 |
op_container_end_page |
34 |
_version_ |
1779310245672124416 |