Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains
International audience Water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) over the last 2500 years (Late Holocene) have been reconstructed using charophyte remains in the lake sediment archives. The study involved 22 pits (1-3 m deep) dug along a transect across the lake sh...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2009
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Online Access: | https://insu.hal.science/insu-00426196 https://insu.hal.science/insu-00426196/document https://insu.hal.science/insu-00426196/file/DA_trichA_.pdf https://doi.org/10.1016/j.palaeo.2009.09.012 |
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ftunivpoitiers:oai:HAL:insu-00426196v1 |
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Open Polar |
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Université de Poitiers: Publications de nos chercheurs.ses (HAL) |
op_collection_id |
ftunivpoitiers |
language |
English |
topic |
Palaeolimnology Late Holocene Charophytes Chara aspera Chara hispida Gyrogonites Karstic lake Middle-Atlas Mountains Morocco [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Palaeolimnology Late Holocene Charophytes Chara aspera Chara hispida Gyrogonites Karstic lake Middle-Atlas Mountains Morocco [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Détriché, Sébastien Bréhéret, Jean-Gabriel Soulié-Märsche, I. Karrat, L. Macaire, Jean-Jacques Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains |
topic_facet |
Palaeolimnology Late Holocene Charophytes Chara aspera Chara hispida Gyrogonites Karstic lake Middle-Atlas Mountains Morocco [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) over the last 2500 years (Late Holocene) have been reconstructed using charophyte remains in the lake sediment archives. The study involved 22 pits (1-3 m deep) dug along a transect across the lake shore terrace. Biogenic activity appears to be a dominant contributor to the accumulation of the lake sediments, as the thickest deposits are tufas composed of charophyte-encrusted stems with numerous gyrogonites (termed "charophyte tufas"). The gyrogonites were identified as Chara aspera and Chara hispida remains. The spatial distribution of these two species, measured vertically within a single core and horizontally along the shore terrace, varies according to bathymetry. Shallow proximal environments are characterized by the development of C. aspera, whereas C. hispida remains are mostly observed in distal sediments. Moreover, according to their ecological characteristics, the C. hispida belt migrated proximally when the water level rose, whereas the C. aspera belt migrated distally when the water level fell. These trends were observed successively in a single charophyte tufa layer which records the rise, highstand, and fall of lake level in a single depositional sequence. The late Holocene palaeobathymetry of Lake Afourgagh was inferred by comparing data on charophyte remains and deposit geometry. Data provide evidence for four major low lake level phases (estimated in terms of amplitude) which induced the development of palaeosols in proximal settings at 2191 cal. BP, 1769 BP, 1515 cal. BP and 1062 cal. BP. These results confirm the accuracy of charophyte-based palaeobathymetry studies. |
author2 |
Transferts continentaux : forçages anthropiques, climatiques et géodynamiques Institut des Sciences de la Terre d'Orléans (ISTO) Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) Université Sidi Mohamed Ben Abdellah (USMBA) This work was supported by the "Action Intégrée" MA 01/10 programme (François Rabelais University, Tours, France/Sidi Mohamed Ben Abdellah University, Fez, Morocco) and the CNRS-ECLIPSE project: "Impact anthropique sur l'érosion des sols et la sédimentation dans les zones humides associées durant l'Holocène" in 2005 and 2006-2007 |
format |
Article in Journal/Newspaper |
author |
Détriché, Sébastien Bréhéret, Jean-Gabriel Soulié-Märsche, I. Karrat, L. Macaire, Jean-Jacques |
author_facet |
Détriché, Sébastien Bréhéret, Jean-Gabriel Soulié-Märsche, I. Karrat, L. Macaire, Jean-Jacques |
author_sort |
Détriché, Sébastien |
title |
Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains |
title_short |
Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains |
title_full |
Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains |
title_fullStr |
Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains |
title_full_unstemmed |
Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains |
title_sort |
late holocene water level fluctuations of lake afourgagh (middle-atlas mountains, morocco) inferred from charophyte remains |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://insu.hal.science/insu-00426196 https://insu.hal.science/insu-00426196/document https://insu.hal.science/insu-00426196/file/DA_trichA_.pdf https://doi.org/10.1016/j.palaeo.2009.09.012 |
genre |
Chara aspera Chara hispida |
genre_facet |
Chara aspera Chara hispida |
op_source |
ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://insu.hal.science/insu-00426196 Palaeogeography, Palaeoclimatology, Palaeoecology, 2009, 283 (3-4), pp.134-147. ⟨10.1016/j.palaeo.2009.09.012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2009.09.012 insu-00426196 https://insu.hal.science/insu-00426196 https://insu.hal.science/insu-00426196/document https://insu.hal.science/insu-00426196/file/DA_trichA_.pdf doi:10.1016/j.palaeo.2009.09.012 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.palaeo.2009.09.012 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
283 |
container_issue |
3-4 |
container_start_page |
134 |
op_container_end_page |
147 |
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1810438915662807040 |
spelling |
ftunivpoitiers:oai:HAL:insu-00426196v1 2024-09-15T18:01:51+00:00 Late Holocene water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) inferred from charophyte remains Détriché, Sébastien Bréhéret, Jean-Gabriel Soulié-Märsche, I. Karrat, L. Macaire, Jean-Jacques Transferts continentaux : forçages anthropiques, climatiques et géodynamiques Institut des Sciences de la Terre d'Orléans (ISTO) Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) Université Sidi Mohamed Ben Abdellah (USMBA) This work was supported by the "Action Intégrée" MA 01/10 programme (François Rabelais University, Tours, France/Sidi Mohamed Ben Abdellah University, Fez, Morocco) and the CNRS-ECLIPSE project: "Impact anthropique sur l'érosion des sols et la sédimentation dans les zones humides associées durant l'Holocène" in 2005 and 2006-2007 2009 https://insu.hal.science/insu-00426196 https://insu.hal.science/insu-00426196/document https://insu.hal.science/insu-00426196/file/DA_trichA_.pdf https://doi.org/10.1016/j.palaeo.2009.09.012 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2009.09.012 insu-00426196 https://insu.hal.science/insu-00426196 https://insu.hal.science/insu-00426196/document https://insu.hal.science/insu-00426196/file/DA_trichA_.pdf doi:10.1016/j.palaeo.2009.09.012 info:eu-repo/semantics/OpenAccess ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://insu.hal.science/insu-00426196 Palaeogeography, Palaeoclimatology, Palaeoecology, 2009, 283 (3-4), pp.134-147. ⟨10.1016/j.palaeo.2009.09.012⟩ Palaeolimnology Late Holocene Charophytes Chara aspera Chara hispida Gyrogonites Karstic lake Middle-Atlas Mountains Morocco [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2009 ftunivpoitiers https://doi.org/10.1016/j.palaeo.2009.09.012 2024-07-18T03:12:21Z International audience Water level fluctuations of Lake Afourgagh (Middle-Atlas Mountains, Morocco) over the last 2500 years (Late Holocene) have been reconstructed using charophyte remains in the lake sediment archives. The study involved 22 pits (1-3 m deep) dug along a transect across the lake shore terrace. Biogenic activity appears to be a dominant contributor to the accumulation of the lake sediments, as the thickest deposits are tufas composed of charophyte-encrusted stems with numerous gyrogonites (termed "charophyte tufas"). The gyrogonites were identified as Chara aspera and Chara hispida remains. The spatial distribution of these two species, measured vertically within a single core and horizontally along the shore terrace, varies according to bathymetry. Shallow proximal environments are characterized by the development of C. aspera, whereas C. hispida remains are mostly observed in distal sediments. Moreover, according to their ecological characteristics, the C. hispida belt migrated proximally when the water level rose, whereas the C. aspera belt migrated distally when the water level fell. These trends were observed successively in a single charophyte tufa layer which records the rise, highstand, and fall of lake level in a single depositional sequence. The late Holocene palaeobathymetry of Lake Afourgagh was inferred by comparing data on charophyte remains and deposit geometry. Data provide evidence for four major low lake level phases (estimated in terms of amplitude) which induced the development of palaeosols in proximal settings at 2191 cal. BP, 1769 BP, 1515 cal. BP and 1062 cal. BP. These results confirm the accuracy of charophyte-based palaeobathymetry studies. Article in Journal/Newspaper Chara aspera Chara hispida Université de Poitiers: Publications de nos chercheurs.ses (HAL) Palaeogeography, Palaeoclimatology, Palaeoecology 283 3-4 134 147 |