Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy).
Poster International audience Lake Ledro is part of the French program ANR LAMA (coordinators: M. Magny and N. Combourieu Nebout) which aims to link Holocene paleoenvironmental changes along a north-south transect in Italy. Lake Ledro (652 m a.s.l.; Trentino, north-eastern Italy) is the northward co...
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2010
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Online Access: | https://hal.archives-ouvertes.fr/hal-00481825 |
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geo envir Joannin, Sébastien Vannière, Boris Galop, Didier Magny, Michel Gilli, Adrian Chapron, Emmanuel Wirth, Stefanie Anselmetti, Flavio Desmet, Marc Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). |
topic_facet |
geo envir |
description |
Poster International audience Lake Ledro is part of the French program ANR LAMA (coordinators: M. Magny and N. Combourieu Nebout) which aims to link Holocene paleoenvironmental changes along a north-south transect in Italy. Lake Ledro (652 m a.s.l.; Trentino, north-eastern Italy) is the northward component of the transect. It is located on the southern slope of the Alps and its catchment area covers 131 km2 with mountains culminating at 1500-2000 m. A multi-proxy approach based on biotic and abiotic indicators (lake-level, palynology, geochemistry and geophysic) was developed from deep and littoral cores, including sediment sequences in Early and Middle Bronze Age lake-shore archaeological sites. We aim reconstructing paleoenvironmental changes resulting from both climate and anthropic influences trough the entire Holocene. A deep master core was built after extracting twin cores from a non disturbed sediment zone recognised by seismic-reflexion investigations. The age-depth model is based on 13 AMS 14C ages measured on terrestrial plant macrofossils and the mean temporal resolution for analyses is ca 60 years. Palynological study shows the usual vegetation succession for the southern slope of the Alps. During the first part of the Holocene, abrupt changes are observed in pollen assemblages in relation to changes in other proxies (XRF and Magnetic Susceptibility) and correlate with cold events associated to the deglaciation in the North-Atlantic area. Cool episodes corresponding to the PreBoreal Oscillation (ca 11.3 ka cal BP) and 8.2 ka event are respectively characterized by stopping afforestation and a strong development of Abies in the local ecosystem. During the second part of the Holocene, two declines of arboreal pollen abundance are observed in relation with occurrences in both cereal and anthropic pollen indicators. These two phases are confirmed by increase in soil erosion as indicated by abiotic proxies. They give evidence of two successive steps for human settlement (Early-Middle Bronze Age and ... |
author2 |
Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE) Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC)-Centre National de la Recherche Scientifique (CNRS) PaleoEnvironnements et PaleobioSphere (PEPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) Maison des Sciences de l'Homme et de l'Environnement Claude Nicolas Ledoux (UAR 3124) (MSHE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Géographie de l'environnement (GEODE) Université Toulouse - Jean Jaurès (UT2J)-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Swiss Federal Institute of Technology - ETH Zürich (D-ERDW) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Institut des Sciences de la Terre d'Orléans (ISTO) Université de Tours (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Geological Institute ETH Zürich Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) ACCES-INRP |
format |
Other/Unknown Material |
author |
Joannin, Sébastien Vannière, Boris Galop, Didier Magny, Michel Gilli, Adrian Chapron, Emmanuel Wirth, Stefanie Anselmetti, Flavio Desmet, Marc |
author_facet |
Joannin, Sébastien Vannière, Boris Galop, Didier Magny, Michel Gilli, Adrian Chapron, Emmanuel Wirth, Stefanie Anselmetti, Flavio Desmet, Marc |
author_sort |
Joannin, Sébastien |
title |
Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). |
title_short |
Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). |
title_full |
Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). |
title_fullStr |
Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). |
title_full_unstemmed |
Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). |
title_sort |
holocene vegetation changes through lac ledro sediments (trentino, italy). |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-00481825 |
op_coverage |
Vienne, Austria |
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ENVELOPE(-97.607,-97.607,56.000,56.000) |
geographic |
Age Lake |
geographic_facet |
Age Lake |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société EGU Natural and anthropogenic environmental change as evidenced in high-resolution continental archives (co-listed) EGU Natural and anthropogenic environmental change as evidenced in high-resolution continental archives (co-listed), May 2010, Vienne, Austria |
op_relation |
hal-00481825 10670/1.r1ol05 https://hal.archives-ouvertes.fr/hal-00481825 |
op_rights |
undefined |
_version_ |
1766135242112892928 |
spelling |
fttriple:oai:gotriple.eu:10670/1.r1ol05 2023-05-15T17:35:56+02:00 Holocene vegetation changes through Lac Ledro sediments (Trentino, Italy). Joannin, Sébastien Vannière, Boris Galop, Didier Magny, Michel Gilli, Adrian Chapron, Emmanuel Wirth, Stefanie Anselmetti, Flavio Desmet, Marc Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE) Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC)-Centre National de la Recherche Scientifique (CNRS) PaleoEnvironnements et PaleobioSphere (PEPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) Maison des Sciences de l'Homme et de l'Environnement Claude Nicolas Ledoux (UAR 3124) (MSHE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Géographie de l'environnement (GEODE) Université Toulouse - Jean Jaurès (UT2J)-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Swiss Federal Institute of Technology - ETH Zürich (D-ERDW) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Institut des Sciences de la Terre d'Orléans (ISTO) Université de Tours (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Geological Institute ETH Zürich Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) ACCES-INRP Vienne, Austria 2010-05-02 https://hal.archives-ouvertes.fr/hal-00481825 en eng HAL CCSD hal-00481825 10670/1.r1ol05 https://hal.archives-ouvertes.fr/hal-00481825 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société EGU Natural and anthropogenic environmental change as evidenced in high-resolution continental archives (co-listed) EGU Natural and anthropogenic environmental change as evidenced in high-resolution continental archives (co-listed), May 2010, Vienne, Austria geo envir Conference Output https://vocabularies.coar-repositories.org/resource_types/c_c94f/ 2010 fttriple 2023-01-22T17:29:37Z Poster International audience Lake Ledro is part of the French program ANR LAMA (coordinators: M. Magny and N. Combourieu Nebout) which aims to link Holocene paleoenvironmental changes along a north-south transect in Italy. Lake Ledro (652 m a.s.l.; Trentino, north-eastern Italy) is the northward component of the transect. It is located on the southern slope of the Alps and its catchment area covers 131 km2 with mountains culminating at 1500-2000 m. A multi-proxy approach based on biotic and abiotic indicators (lake-level, palynology, geochemistry and geophysic) was developed from deep and littoral cores, including sediment sequences in Early and Middle Bronze Age lake-shore archaeological sites. We aim reconstructing paleoenvironmental changes resulting from both climate and anthropic influences trough the entire Holocene. A deep master core was built after extracting twin cores from a non disturbed sediment zone recognised by seismic-reflexion investigations. The age-depth model is based on 13 AMS 14C ages measured on terrestrial plant macrofossils and the mean temporal resolution for analyses is ca 60 years. Palynological study shows the usual vegetation succession for the southern slope of the Alps. During the first part of the Holocene, abrupt changes are observed in pollen assemblages in relation to changes in other proxies (XRF and Magnetic Susceptibility) and correlate with cold events associated to the deglaciation in the North-Atlantic area. Cool episodes corresponding to the PreBoreal Oscillation (ca 11.3 ka cal BP) and 8.2 ka event are respectively characterized by stopping afforestation and a strong development of Abies in the local ecosystem. During the second part of the Holocene, two declines of arboreal pollen abundance are observed in relation with occurrences in both cereal and anthropic pollen indicators. These two phases are confirmed by increase in soil erosion as indicated by abiotic proxies. They give evidence of two successive steps for human settlement (Early-Middle Bronze Age and ... Other/Unknown Material North Atlantic Unknown Age Lake ENVELOPE(-97.607,-97.607,56.000,56.000) |