Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers
International audience Paleoenvironmental studies previously performed on Lake Igaliku revealed two agropastoral phases in south Greenland: the Norse settlement from AD 986 to ca. AD 1450 and the recent installation of sheep farmers, since the 1920s. To improve the knowledge of the timing and magnit...
Published in: | The Holocene |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://hal.science/hal-01568909 https://doi.org/10.1177/0959683616675811 |
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ftbrgm:oai:HAL:hal-01568909v1 |
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Open Polar |
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BRGM: HAL (Bureau de Recherches Géologiques et Minières) |
op_collection_id |
ftbrgm |
language |
English |
topic |
agropastoral activities ecosystem responses lake sediments molecular biomarkers Norse south Greenland [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
agropastoral activities ecosystem responses lake sediments molecular biomarkers Norse south Greenland [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Guillemot, Typhaine Bichet, Vincent Gauthier, Emilie Zocatelli, Renata Massa, Charly Richard, Hervé Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers |
topic_facet |
agropastoral activities ecosystem responses lake sediments molecular biomarkers Norse south Greenland [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Paleoenvironmental studies previously performed on Lake Igaliku revealed two agropastoral phases in south Greenland: the Norse settlement from AD 986 to ca. AD 1450 and the recent installation of sheep farmers, since the 1920s. To improve the knowledge of the timing and magnitude of the Greenlandic agropastoral activities, a lipid inventory was realized and compared with biological and geochemical data. During the 12th century, a major increase in deoxycholic acid (DOC) and coprophilous fungal spores revealed a maximum of herbivores. Synchronously, a minimum of the n-C29/n-C31 alkane ratio and tree and shrub pollen and a maximum of triterpenyl acetates showed a reduction in the tree and shrub cover, because of grazing activities. Lupanone, produced by angiosperms, appeared simultaneously in the molecular content, probably revealing an introduction of plant species by the Norse, as it has been the case for Rumex spp. No major erosion was recorded by trimethyl-tetrahydrocrysenes (TTHCs) and titanium (Ti) fluxes. No massive algal production, identified by the n-C17/total n-alkane ratio and mesotrophic diatoms, was either revealed. After the Norse abandon (around AD 1450), a return of the vegetation to quasi-pristine conditions was observed in the molecular content. Finally, a re-introduction of sheep in the 1920s provoked major impacts between the 1970s and the 1990s. A major decrease in the n-C29/n-C31 alkane ratio and tree and shrub pollen associated with maxima of triterpenyl acetates, TTHCs, Ti fluxes, and mesotrophic diatoms highlighted a reduction in the tree and shrub cover, a strong soil mobilization, and algal blooms, probably linking to the recent mechanized creation of hay fields and the massive use of fertilizers. In this study, molecular biomarkers revealed two periods of major impacts: the 12th century and between the 1970s and the 1990s, separated by centuries without agropastoral practices, allowing a quasi-resilience of the vegetation. |
author2 |
Swiss Federal Insitute of Aquatic Science and Technology Dübendorf (EAWAG) 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)-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) Biogéosystèmes Continentaux - UMR7327 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)-Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) |
format |
Article in Journal/Newspaper |
author |
Guillemot, Typhaine Bichet, Vincent Gauthier, Emilie Zocatelli, Renata Massa, Charly Richard, Hervé |
author_facet |
Guillemot, Typhaine Bichet, Vincent Gauthier, Emilie Zocatelli, Renata Massa, Charly Richard, Hervé |
author_sort |
Guillemot, Typhaine |
title |
Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers |
title_short |
Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers |
title_full |
Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers |
title_fullStr |
Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers |
title_full_unstemmed |
Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers |
title_sort |
environmental responses of past and recent agropastoral activities on south greenlandic ecosystems through molecular biomarkers |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-01568909 https://doi.org/10.1177/0959683616675811 |
genre |
Greenland greenlandic Igaliku |
genre_facet |
Greenland greenlandic Igaliku |
op_source |
ISSN: 0959-6836 EISSN: 1477-0911 The Holocene https://hal.science/hal-01568909 The Holocene, 2017, 27 (6), pp.783-795. ⟨10.1177/0959683616675811⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683616675811 hal-01568909 https://hal.science/hal-01568909 doi:10.1177/0959683616675811 |
op_doi |
https://doi.org/10.1177/0959683616675811 |
container_title |
The Holocene |
container_volume |
27 |
container_issue |
6 |
container_start_page |
783 |
op_container_end_page |
795 |
_version_ |
1799480938926702592 |
spelling |
ftbrgm:oai:HAL:hal-01568909v1 2024-05-19T07:41:20+00:00 Environmental responses of past and recent agropastoral activities on south Greenlandic ecosystems through molecular biomarkers Guillemot, Typhaine Bichet, Vincent Gauthier, Emilie Zocatelli, Renata Massa, Charly Richard, Hervé Swiss Federal Insitute of Aquatic Science and Technology Dübendorf (EAWAG) 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)-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) Biogéosystèmes Continentaux - UMR7327 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)-Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) 2017 https://hal.science/hal-01568909 https://doi.org/10.1177/0959683616675811 en eng HAL CCSD London: Sage info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683616675811 hal-01568909 https://hal.science/hal-01568909 doi:10.1177/0959683616675811 ISSN: 0959-6836 EISSN: 1477-0911 The Holocene https://hal.science/hal-01568909 The Holocene, 2017, 27 (6), pp.783-795. ⟨10.1177/0959683616675811⟩ agropastoral activities ecosystem responses lake sediments molecular biomarkers Norse south Greenland [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2017 ftbrgm https://doi.org/10.1177/0959683616675811 2024-05-02T00:19:54Z International audience Paleoenvironmental studies previously performed on Lake Igaliku revealed two agropastoral phases in south Greenland: the Norse settlement from AD 986 to ca. AD 1450 and the recent installation of sheep farmers, since the 1920s. To improve the knowledge of the timing and magnitude of the Greenlandic agropastoral activities, a lipid inventory was realized and compared with biological and geochemical data. During the 12th century, a major increase in deoxycholic acid (DOC) and coprophilous fungal spores revealed a maximum of herbivores. Synchronously, a minimum of the n-C29/n-C31 alkane ratio and tree and shrub pollen and a maximum of triterpenyl acetates showed a reduction in the tree and shrub cover, because of grazing activities. Lupanone, produced by angiosperms, appeared simultaneously in the molecular content, probably revealing an introduction of plant species by the Norse, as it has been the case for Rumex spp. No major erosion was recorded by trimethyl-tetrahydrocrysenes (TTHCs) and titanium (Ti) fluxes. No massive algal production, identified by the n-C17/total n-alkane ratio and mesotrophic diatoms, was either revealed. After the Norse abandon (around AD 1450), a return of the vegetation to quasi-pristine conditions was observed in the molecular content. Finally, a re-introduction of sheep in the 1920s provoked major impacts between the 1970s and the 1990s. A major decrease in the n-C29/n-C31 alkane ratio and tree and shrub pollen associated with maxima of triterpenyl acetates, TTHCs, Ti fluxes, and mesotrophic diatoms highlighted a reduction in the tree and shrub cover, a strong soil mobilization, and algal blooms, probably linking to the recent mechanized creation of hay fields and the massive use of fertilizers. In this study, molecular biomarkers revealed two periods of major impacts: the 12th century and between the 1970s and the 1990s, separated by centuries without agropastoral practices, allowing a quasi-resilience of the vegetation. Article in Journal/Newspaper Greenland greenlandic Igaliku BRGM: HAL (Bureau de Recherches Géologiques et Minières) The Holocene 27 6 783 795 |