BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA
Présentation orale International audience During the last two millennia, global climate warming events allowed two phases of agricultural expansion in Southwestern Greenland (Massa et al., 2012a). The first phase coincided with the medieval Norse colonization between 986 AD and the mid-fifteenth cen...
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ftunivnantes:oai:HAL:insu-00864274v1 2023-05-15T16:28:45+02:00 BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA Guillemot, Typhaine Jacob, Jérémy Zocatelli, Renata Bichet, Vincent Massa, Charly Gauthier, Emilie Le Milbeau, Claude Richard, Hervé Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Tenerife, Spain 2013-09-15 https://hal-insu.archives-ouvertes.fr/insu-00864274 en eng HAL CCSD insu-00864274 https://hal-insu.archives-ouvertes.fr/insu-00864274 IMOG : the 26th International Meeting on Organic Geochemistry https://hal-insu.archives-ouvertes.fr/insu-00864274 IMOG : the 26th International Meeting on Organic Geochemistry, Sep 2013, Tenerife, Spain [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/conferenceObject Conference papers 2013 ftunivnantes 2023-02-08T00:05:55Z Présentation orale International audience During the last two millennia, global climate warming events allowed two phases of agricultural expansion in Southwestern Greenland (Massa et al., 2012a). The first phase coincided with the medieval Norse colonization between 986 AD and the mid-fifteenth century; the second, corresponds to the modern reestablishment of farmers since 1920, after the end of the Little Ice Age. This context appears as an exceptional study model to examine the transition from a pristine to an anthropogenic landscape. To this respect, lake deposits provide a sensitive recorder of environmental changes due to land use. In order to assess the history and impacts of grazing activities, a first molecular inventory was conducted on a sedimentary sequence retrieved from Lake Igaliku (61°00'N, 45°26'W, 15m asl). A well-dated core spanning the last two millennia was analyzed in order to identify biomarkers that attest to pastoralism such as fecal sterols (Bull et al., 2001) and bile acids (Tyagi et al., 2008). 40 samples were extracted, separated into neutral, acid and polar fractions. The neutral fraction was further separated into aliphatics, aromatics, ethers ketones and alcohols by flash chromatography. After addition of an internal standard, fractions were analysed by Gas Chromatography-Mass Spectrometry. 205 compounds were identified and quantified including n-alkanes, n-alkan-2-ones, mid-chain ketones, wax esters, sterols, hopanoids, fernenes, triterpenyl acetates, polycyclic aromatic hydrocarbons (PAH), tricyclic diterpenes, fatty acids, bile acids, diacids and hydroxy-acids. Principle Components Analysis of the data allowed us distinguishing three main groups of distinct behaviour: (i) fatty acids, bile acids, diacids and hydroxy-acids; (ii) tricyclic diterpenes; (iii) PAH and sterols. The evolution of biomarker concentrations were compared to other parameters such as total organic carbon, total nitrogen and sulfur contents, sediment accumulation rate and non-pollens palynomorph ... Conference Object Greenland Igaliku Université de Nantes: HAL-UNIV-NANTES Greenland Igaliku ENVELOPE(-45.421,-45.421,60.988,60.988) |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Guillemot, Typhaine Jacob, Jérémy Zocatelli, Renata Bichet, Vincent Massa, Charly Gauthier, Emilie Le Milbeau, Claude Richard, Hervé BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
description |
Présentation orale International audience During the last two millennia, global climate warming events allowed two phases of agricultural expansion in Southwestern Greenland (Massa et al., 2012a). The first phase coincided with the medieval Norse colonization between 986 AD and the mid-fifteenth century; the second, corresponds to the modern reestablishment of farmers since 1920, after the end of the Little Ice Age. This context appears as an exceptional study model to examine the transition from a pristine to an anthropogenic landscape. To this respect, lake deposits provide a sensitive recorder of environmental changes due to land use. In order to assess the history and impacts of grazing activities, a first molecular inventory was conducted on a sedimentary sequence retrieved from Lake Igaliku (61°00'N, 45°26'W, 15m asl). A well-dated core spanning the last two millennia was analyzed in order to identify biomarkers that attest to pastoralism such as fecal sterols (Bull et al., 2001) and bile acids (Tyagi et al., 2008). 40 samples were extracted, separated into neutral, acid and polar fractions. The neutral fraction was further separated into aliphatics, aromatics, ethers ketones and alcohols by flash chromatography. After addition of an internal standard, fractions were analysed by Gas Chromatography-Mass Spectrometry. 205 compounds were identified and quantified including n-alkanes, n-alkan-2-ones, mid-chain ketones, wax esters, sterols, hopanoids, fernenes, triterpenyl acetates, polycyclic aromatic hydrocarbons (PAH), tricyclic diterpenes, fatty acids, bile acids, diacids and hydroxy-acids. Principle Components Analysis of the data allowed us distinguishing three main groups of distinct behaviour: (i) fatty acids, bile acids, diacids and hydroxy-acids; (ii) tricyclic diterpenes; (iii) PAH and sterols. The evolution of biomarker concentrations were compared to other parameters such as total organic carbon, total nitrogen and sulfur contents, sediment accumulation rate and non-pollens palynomorph ... |
author2 |
Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Guillemot, Typhaine Jacob, Jérémy Zocatelli, Renata Bichet, Vincent Massa, Charly Gauthier, Emilie Le Milbeau, Claude Richard, Hervé |
author_facet |
Guillemot, Typhaine Jacob, Jérémy Zocatelli, Renata Bichet, Vincent Massa, Charly Gauthier, Emilie Le Milbeau, Claude Richard, Hervé |
author_sort |
Guillemot, Typhaine |
title |
BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA |
title_short |
BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA |
title_full |
BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA |
title_fullStr |
BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA |
title_full_unstemmed |
BIOMARKER INSIGHTS INTO THE EVOLUTION OF LAND USE IN SOUTHERN GREENLAND DURING THE LAST TWO MILLENIA |
title_sort |
biomarker insights into the evolution of land use in southern greenland during the last two millenia |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00864274 |
op_coverage |
Tenerife, Spain |
long_lat |
ENVELOPE(-45.421,-45.421,60.988,60.988) |
geographic |
Greenland Igaliku |
geographic_facet |
Greenland Igaliku |
genre |
Greenland Igaliku |
genre_facet |
Greenland Igaliku |
op_source |
IMOG : the 26th International Meeting on Organic Geochemistry https://hal-insu.archives-ouvertes.fr/insu-00864274 IMOG : the 26th International Meeting on Organic Geochemistry, Sep 2013, Tenerife, Spain |
op_relation |
insu-00864274 https://hal-insu.archives-ouvertes.fr/insu-00864274 |
_version_ |
1766018432400097280 |