Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs.
Relationships between steppe vegetation, human practices and climate changes in the past are crucial to disentangle human development in Eurasia. In this frame, our study investigates (1) modern pollenvegetation relationships and (2) changes in vegetation, human activity and climate in the Holocene...
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Online Access: | http://hdl.handle.net/11695/103241 https://doi.org/10.1016/j.quascirev.2021.107297 |
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ftunivmoliseiris:oai:iris.unimol.it:11695/103241 2024-04-14T08:16:13+00:00 Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. Mary Robles Odile Peyron Elisabetta Brugiapaglia Guillemette Menot Lucas Dugerdil Vincent Ollivier Salome Ansanay-Alex Anne-Lise Develle Petros Tozalakyan Khachatur Meliksetian Kristina Sahakyan Lilit Sahakyan Berengere Perello Ruben Badalyan Claude Colombie Sebastien Joannin Robles, MARY AURORE Peyron, Odile Brugiapaglia, Elisabetta Menot, Guillemette Dugerdil, Luca Ollivier, Vincent Ansanay-Alex, Salome Develle, Anne-Lise Tozalakyan, Petro Meliksetian, Khachatur Sahakyan, Kristina Sahakyan, Lilit Perello, Berengere Badalyan, Ruben Colombie, Claude Joannin, Sebastien 2021 http://hdl.handle.net/11695/103241 https://doi.org/10.1016/j.quascirev.2021.107297 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000766906200004 volume:277 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11695/103241 https://doi.org/10.1016/j.quascirev.2021.107297 Vegetation dynamics Human impact Agriculture Water level changes Paleoclimate Arid climate events Transfer functions XRF info:eu-repo/semantics/article 2021 ftunivmoliseiris https://doi.org/10.1016/j.quascirev.2021.107297 2024-03-21T18:12:32Z Relationships between steppe vegetation, human practices and climate changes in the past are crucial to disentangle human development in Eurasia. In this frame, our study investigates (1) modern pollenvegetation relationships and (2) changes in vegetation, human activity and climate in the Holocene record of Vanevan peat (south-eastern shore of Lake Sevan, Armenia), using a multiproxy approach including sediment geochemistry (XRF), pollen, Non-Pollen Palynomorphs (NPPs), and branched Glycerol Dialkyl Glycerol Tetraethers (brGDGTs). Climate reconstructions are provided by (1) water-level changes, (2) brGDGTs, and (3) pollen transfer functions (multi-method approach: Modern Analogue Technique, Weighted Averaging Partial Least Squares regression, Random Forest, and Boosted Regression Trees). Modern pollen assemblages are selected along an altitudinal transect in Armenia. They show a dominance of Chenopodiaceae in semi-desert/steppe regions while meadows steppes, subalpine, and alpine meadows are dominated by Poaceae. Past vegetation is characterized by steppes dominated by Poaceae surrounded during the Mid-Holocene (8200e4200 a cal BP) by scarce open woodlands. Humans have influenced the local vegetation, mainly through their agricultural practices present since 5200 a cal BP with several intensification steps. Our reconstruction indicates a climate shift from a cold and arid Early Holocene toward a warmer and more humid Mid-Late Holocene. An aridification trend marks the last 5000 years causing a drop in water level, which allowed humans to live and cultivate on Lake Sevan shores. Arid events are recorded at 6.2 ka, 5.2 ka, 4.2 ka and 2.8 ka a cal BP, which are commonly related to multi-centennial-scale variations of Westerlies activity (North Atlantic Oscillation). Through our temperature reconstruction, we can assign (1) the 5.2 and 2.8 ka events as being cold and probably related to a strong Siberian High, and (2) the 4.2 ka event as being warm associated with high Arabian subtropical pressures in the South ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Università degli Studi del Molise: IRIS Quaternary Science Reviews 277 107297 |
institution |
Open Polar |
collection |
Università degli Studi del Molise: IRIS |
op_collection_id |
ftunivmoliseiris |
language |
English |
topic |
Vegetation dynamics Human impact Agriculture Water level changes Paleoclimate Arid climate events Transfer functions XRF |
spellingShingle |
Vegetation dynamics Human impact Agriculture Water level changes Paleoclimate Arid climate events Transfer functions XRF Mary Robles Odile Peyron Elisabetta Brugiapaglia Guillemette Menot Lucas Dugerdil Vincent Ollivier Salome Ansanay-Alex Anne-Lise Develle Petros Tozalakyan Khachatur Meliksetian Kristina Sahakyan Lilit Sahakyan Berengere Perello Ruben Badalyan Claude Colombie Sebastien Joannin Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. |
topic_facet |
Vegetation dynamics Human impact Agriculture Water level changes Paleoclimate Arid climate events Transfer functions XRF |
description |
Relationships between steppe vegetation, human practices and climate changes in the past are crucial to disentangle human development in Eurasia. In this frame, our study investigates (1) modern pollenvegetation relationships and (2) changes in vegetation, human activity and climate in the Holocene record of Vanevan peat (south-eastern shore of Lake Sevan, Armenia), using a multiproxy approach including sediment geochemistry (XRF), pollen, Non-Pollen Palynomorphs (NPPs), and branched Glycerol Dialkyl Glycerol Tetraethers (brGDGTs). Climate reconstructions are provided by (1) water-level changes, (2) brGDGTs, and (3) pollen transfer functions (multi-method approach: Modern Analogue Technique, Weighted Averaging Partial Least Squares regression, Random Forest, and Boosted Regression Trees). Modern pollen assemblages are selected along an altitudinal transect in Armenia. They show a dominance of Chenopodiaceae in semi-desert/steppe regions while meadows steppes, subalpine, and alpine meadows are dominated by Poaceae. Past vegetation is characterized by steppes dominated by Poaceae surrounded during the Mid-Holocene (8200e4200 a cal BP) by scarce open woodlands. Humans have influenced the local vegetation, mainly through their agricultural practices present since 5200 a cal BP with several intensification steps. Our reconstruction indicates a climate shift from a cold and arid Early Holocene toward a warmer and more humid Mid-Late Holocene. An aridification trend marks the last 5000 years causing a drop in water level, which allowed humans to live and cultivate on Lake Sevan shores. Arid events are recorded at 6.2 ka, 5.2 ka, 4.2 ka and 2.8 ka a cal BP, which are commonly related to multi-centennial-scale variations of Westerlies activity (North Atlantic Oscillation). Through our temperature reconstruction, we can assign (1) the 5.2 and 2.8 ka events as being cold and probably related to a strong Siberian High, and (2) the 4.2 ka event as being warm associated with high Arabian subtropical pressures in the South ... |
author2 |
Robles, MARY AURORE Peyron, Odile Brugiapaglia, Elisabetta Menot, Guillemette Dugerdil, Luca Ollivier, Vincent Ansanay-Alex, Salome Develle, Anne-Lise Tozalakyan, Petro Meliksetian, Khachatur Sahakyan, Kristina Sahakyan, Lilit Perello, Berengere Badalyan, Ruben Colombie, Claude Joannin, Sebastien |
format |
Article in Journal/Newspaper |
author |
Mary Robles Odile Peyron Elisabetta Brugiapaglia Guillemette Menot Lucas Dugerdil Vincent Ollivier Salome Ansanay-Alex Anne-Lise Develle Petros Tozalakyan Khachatur Meliksetian Kristina Sahakyan Lilit Sahakyan Berengere Perello Ruben Badalyan Claude Colombie Sebastien Joannin |
author_facet |
Mary Robles Odile Peyron Elisabetta Brugiapaglia Guillemette Menot Lucas Dugerdil Vincent Ollivier Salome Ansanay-Alex Anne-Lise Develle Petros Tozalakyan Khachatur Meliksetian Kristina Sahakyan Lilit Sahakyan Berengere Perello Ruben Badalyan Claude Colombie Sebastien Joannin |
author_sort |
Mary Robles |
title |
Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. |
title_short |
Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. |
title_full |
Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. |
title_fullStr |
Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. |
title_full_unstemmed |
Impact of climate changes on vegetation and human societies during the Holocene in the South Caucasus (Vanevan, Armenia): A multiproxy approach including pollen, NPPs and brGDGTs. |
title_sort |
impact of climate changes on vegetation and human societies during the holocene in the south caucasus (vanevan, armenia): a multiproxy approach including pollen, npps and brgdgts. |
publishDate |
2021 |
url |
http://hdl.handle.net/11695/103241 https://doi.org/10.1016/j.quascirev.2021.107297 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000766906200004 volume:277 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11695/103241 https://doi.org/10.1016/j.quascirev.2021.107297 |
op_doi |
https://doi.org/10.1016/j.quascirev.2021.107297 |
container_title |
Quaternary Science Reviews |
container_volume |
277 |
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107297 |
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1796314831522889728 |