Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic)
International audience Within the Porcupine Bank Canyon (NE Atlantic), cold-water coral (CWC) mounds are mostly found clustered along the canyon lip, with individual disconnected mounds occurring nearby on the western Porcupine Bank. Remotely operated vehicle-mounted vibrocoring was utilized to acqu...
Published in: | Marine Geology |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://univ-angers.hal.science/hal-04278613 https://univ-angers.hal.science/hal-04278613/document https://univ-angers.hal.science/hal-04278613/file/1-s2.0-S0025322722002018-main.pdf https://doi.org/10.1016/j.margeo.2022.106930 |
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ftunivnantes:oai:HAL:hal-04278613v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Cold-water corals Benthic foraminifera assemblages Holocene NE Atlantic submarine canyon [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Cold-water corals Benthic foraminifera assemblages Holocene NE Atlantic submarine canyon [SDE.MCG]Environmental Sciences/Global Changes O'Reilly, Luke Fentimen, Robin Butschek, Felix Titschack, Jürgen Lim, Aaron Moore, Niamh O'Connor, O, J Appah, John Harris, Kimberley Vennemann, Torsten Wheeler, Andrew, J Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) |
topic_facet |
Cold-water corals Benthic foraminifera assemblages Holocene NE Atlantic submarine canyon [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Within the Porcupine Bank Canyon (NE Atlantic), cold-water coral (CWC) mounds are mostly found clustered along the canyon lip, with individual disconnected mounds occurring nearby on the western Porcupine Bank. Remotely operated vehicle-mounted vibrocoring was utilized to acquire cores from both of these sites. This study is the first to employ this novel method when aiming to precisely sample two closely situated areas. Radiometric ages constrain the records from the early to mid-Holocene (9.1 to 5.6 ka BP). The cores were then subjected to 3D segmented computer tomography to capture mound formation stages. The cores were then further examined using stable isotopes and benthic foraminiferal assemblages, to constrain the paleoenvironmental variation that influenced CWC mound formation of each site. In total, mound aggradation rate in the Porcupine Bank Canyon and western Porcupine Bank was comparable to other Holocene CWC mounds situated off western Ireland. Results derived from multiproxy analysis, show that regional climatic shifts define the environmental conditions that allow positive coral mound formation. In addition, the aggradation rate of coral mounds is higher adjacent to the Porcupine Bank Canyon than on the western Porcupine Bank. Benthic foraminifera assemblages and planktic foraminiferal δ13C reveal that higher quality organic matter is more readily available closer to the canyon lip. As such, we hypothesize that coral mound formation in the region is likely controlled by an interplay between enhanced shelf currents and the existence of the Eastern North Atlantic Water-Mediterranean Outflow Water-Transition Zone. The geomorphology of the canyon promotes upwelling of these water masses that are enriched in particles, including food and sediment supply. The higher availability of these particles support the development and succession of ecological hotspots along the canyon lip and adjacent areas of the seafloor. These observations provide a glimpse into the role that ... |
author2 |
University College Cork (UCC) Laboratoire de Planétologie et Géosciences - Angers (LPG-ANGERS) Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Université de Lausanne = University of Lausanne (UNIL) |
format |
Article in Journal/Newspaper |
author |
O'Reilly, Luke Fentimen, Robin Butschek, Felix Titschack, Jürgen Lim, Aaron Moore, Niamh O'Connor, O, J Appah, John Harris, Kimberley Vennemann, Torsten Wheeler, Andrew, J |
author_facet |
O'Reilly, Luke Fentimen, Robin Butschek, Felix Titschack, Jürgen Lim, Aaron Moore, Niamh O'Connor, O, J Appah, John Harris, Kimberley Vennemann, Torsten Wheeler, Andrew, J |
author_sort |
O'Reilly, Luke |
title |
Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) |
title_short |
Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) |
title_full |
Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) |
title_fullStr |
Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) |
title_full_unstemmed |
Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) |
title_sort |
environmental forcing by submarine canyons: evidence between two closely situated cold-water coral mounds (porcupine bank canyon and western porcupine bank, ne atlantic) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://univ-angers.hal.science/hal-04278613 https://univ-angers.hal.science/hal-04278613/document https://univ-angers.hal.science/hal-04278613/file/1-s2.0-S0025322722002018-main.pdf https://doi.org/10.1016/j.margeo.2022.106930 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0025-3227 Marine Geology https://univ-angers.hal.science/hal-04278613 Marine Geology, 2022, 454, pp.106930. ⟨10.1016/j.margeo.2022.106930⟩ https://www.sciencedirect.com/science/article/pii/S0025322722002018?via%3Dihub |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2022.106930 hal-04278613 https://univ-angers.hal.science/hal-04278613 https://univ-angers.hal.science/hal-04278613/document https://univ-angers.hal.science/hal-04278613/file/1-s2.0-S0025322722002018-main.pdf doi:10.1016/j.margeo.2022.106930 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.margeo.2022.106930 |
container_title |
Marine Geology |
container_volume |
454 |
container_start_page |
106930 |
_version_ |
1799485519920365568 |
spelling |
ftunivnantes:oai:HAL:hal-04278613v1 2024-05-19T07:45:28+00:00 Environmental forcing by submarine canyons: Evidence between two closely situated cold-water coral mounds (Porcupine Bank Canyon and Western Porcupine Bank, NE Atlantic) O'Reilly, Luke Fentimen, Robin Butschek, Felix Titschack, Jürgen Lim, Aaron Moore, Niamh O'Connor, O, J Appah, John Harris, Kimberley Vennemann, Torsten Wheeler, Andrew, J University College Cork (UCC) Laboratoire de Planétologie et Géosciences - Angers (LPG-ANGERS) Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Université de Lausanne = University of Lausanne (UNIL) 2022-10-29 https://univ-angers.hal.science/hal-04278613 https://univ-angers.hal.science/hal-04278613/document https://univ-angers.hal.science/hal-04278613/file/1-s2.0-S0025322722002018-main.pdf https://doi.org/10.1016/j.margeo.2022.106930 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2022.106930 hal-04278613 https://univ-angers.hal.science/hal-04278613 https://univ-angers.hal.science/hal-04278613/document https://univ-angers.hal.science/hal-04278613/file/1-s2.0-S0025322722002018-main.pdf doi:10.1016/j.margeo.2022.106930 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0025-3227 Marine Geology https://univ-angers.hal.science/hal-04278613 Marine Geology, 2022, 454, pp.106930. ⟨10.1016/j.margeo.2022.106930⟩ https://www.sciencedirect.com/science/article/pii/S0025322722002018?via%3Dihub Cold-water corals Benthic foraminifera assemblages Holocene NE Atlantic submarine canyon [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1016/j.margeo.2022.106930 2024-05-01T23:54:34Z International audience Within the Porcupine Bank Canyon (NE Atlantic), cold-water coral (CWC) mounds are mostly found clustered along the canyon lip, with individual disconnected mounds occurring nearby on the western Porcupine Bank. Remotely operated vehicle-mounted vibrocoring was utilized to acquire cores from both of these sites. This study is the first to employ this novel method when aiming to precisely sample two closely situated areas. Radiometric ages constrain the records from the early to mid-Holocene (9.1 to 5.6 ka BP). The cores were then subjected to 3D segmented computer tomography to capture mound formation stages. The cores were then further examined using stable isotopes and benthic foraminiferal assemblages, to constrain the paleoenvironmental variation that influenced CWC mound formation of each site. In total, mound aggradation rate in the Porcupine Bank Canyon and western Porcupine Bank was comparable to other Holocene CWC mounds situated off western Ireland. Results derived from multiproxy analysis, show that regional climatic shifts define the environmental conditions that allow positive coral mound formation. In addition, the aggradation rate of coral mounds is higher adjacent to the Porcupine Bank Canyon than on the western Porcupine Bank. Benthic foraminifera assemblages and planktic foraminiferal δ13C reveal that higher quality organic matter is more readily available closer to the canyon lip. As such, we hypothesize that coral mound formation in the region is likely controlled by an interplay between enhanced shelf currents and the existence of the Eastern North Atlantic Water-Mediterranean Outflow Water-Transition Zone. The geomorphology of the canyon promotes upwelling of these water masses that are enriched in particles, including food and sediment supply. The higher availability of these particles support the development and succession of ecological hotspots along the canyon lip and adjacent areas of the seafloor. These observations provide a glimpse into the role that ... Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Marine Geology 454 106930 |